Radiation Dose Reconstruction

Y-12 Plant
(Site Profile/Docket Number 021)

Location: Oak Ridge, Tennessee

Site Profile

1. Introduction
   (Revised October 24, 2006)
   PDF 135 KB (10 pages)
   
   Revision Includes: Incorporates Y-12 National Security Complex Special Exposure Cohort class descriptions in a new section. Text was added or modified on pages 5 and 6. Headings and citations were added for the Technical Basis Documents. A Reference section was added with the TBD references. The Acronyms and Abbreviations page was adjusted per usage. No sections were deleted. Constitutes a total rewrite of the document. Incorporates formal internal and NIOSH review comments. This revision results in no change to the assigned dose and no PER is required.
   
   
2. Site Description
   (Revised November 8, 2007)
   PDF 316 KB (35 pages)
   
   Revision Includes: Initiated to add Attributions and Annotations section and additional references in response to review. The previous Section A-3, Y-12 Facilities, was eliminated. No further changes occurred as a result of formal internal review. Incorporates formal NIOSH review comments. Constitutes a total rewrite of the document.
   
   
3. Occupational Medical Dose
   (Revised June 18, 2007)
   PDF 293 KB (23 pages)
   
   Revision Includes: Initiated to add Attributions and Annotations section and additional references in response to review. Added a Purpose and Scope subsection to the Introduction (Section 3.1). Incorporates formal internal and NIOSH review comments. This revision results in no change to the assigned dose and no PER is required.
   
   
4. Occupational Environmental Dose
   (Revised July 20, 2006)
   PDF 1 MB (50 pages)
   
   Revision Includes: Revision initiated to incorporate definitions and directions for dose reconstruction for non-presumptive cancers that are excluded from the 1943 through 1947 Special Exposure Cohort. Environmental concentrations in Tables D1 through D6 for the years 1943 through 1947 were marked as 'Reserved'.
   
   
5. Occupational Internal Dose
   (Page Change Revision October 10, 2006)
   PDF 510 KB (47 pages)
   
   Page Change Revision Includes: Page change revision initiated to incorporate Y-12 National Security Complex Special Exposure Cohort class descriptions in newly added Section 5.1.3 on page 10. Minor changes occurred on pages 6, 8, and 9. Added one reference on page 37. Incorporates one new acronym, editorial changes on pages 8, 9, and 10, modifications to SEC instructions in Section 5.1.3.1 on page 10. Two references were deleted from the Reference Section. Incorporates internal and NIOSH formal review comments. No sections were deleted. This revision results in no change to the assigned dose.
   
   
6. Occupational External Dose
   (Revised December 18, 2009)
   PDF 635 KB (61 pages)
   
   Revision Includes: Attachment A in earlier versions of this document was deleted and the relevant data incorporated in the main body of the current document. Sections 6.3.1, 6.3.2, 6.3.3, 6.3.4, 6.4.2, 6.5.1, and 6.5.2 were revised to incorporate updated data from a number of Technical Information Bulletins. Updates references within the text and Reference Section. Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of the document.

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Technical Information Bulletins (TIBs)

• Bayesian Methods for Estimation of Unmonitored Y-12 External Penetrating Doses with a Time-Dependent Lognormal Model
  
  This document has been cancelled. Bayesian methods are no longer used for dose reconstructions. Therefore, information in ORAUT-OTIB-0015 Rev-00 is no longer relevant.
  
  Document Number: ORAUT-OTIB-0015 Rev-00
  
  About this Document: Establishes the technical basis for the Bayesian Methods for estimation of unmonitored Y-12 external penetrating doses with a time-dependent lognormal model.
  
  
• Coworker External Dosimetry Data for the Y-12 National Security Complex
  PDF 431 KB (21 pages)
  
  Document Number: ORAUT-OTIB-0064 Rev-01
  
  Revised: December 18, 2009
  
  Revision Includes: Revision to modify Sections 4.0 and 5.0 to be consistent with current practices of applying coworker data. Table 7-1c and references to Tables 7-1a, 7-1b, and 7-1c were added in Section 7.0. Table 7-1c includes the 95th- and 50th-percentile annual doses derived from Table 7-1a. Adds details for Table 7-1c in Section 7.0. In Section 7.0, Table 7-2 was updated to include 1947 to 1949. Incorporates formal and NIOSH review comments. Updated Attributions and Annotations. Updated references. No sections were deleted.
  
  
• Effect of Threshold Energy and Angular Response of NTA Film on Missed Neutron Dose at the Oak Ridge Y-12 Facility
  PDF 384 KB (23 pages)
  
  Document Number: ORAUT-OTIB-0051 Rev-00
  
  About this Document: Describes the effect of threshold energy and angular response of NTA film on missed neutron dose at the Oak Ridge Y-12 facility.
  
  Approved: May 15, 2006
  
  
• External Radiation Dose Estimates For Individuals Near the 1958 Criticality Accident at the Oak Ridge Y-12 Plant
  PDF 381 KB (21 pages)
  
  Document Number: ORAUT-OTIB-0057 Rev-00
  
  About this Document: To be used for external radiation dose estimates for individuals near the 1958 criticality accident at the Oak Ridge Y-12 plant.
  
  Approved: May 15, 2006
  
  
• External Radiation Monitoring at the Y-12 Facility During the 1948-1949 Period
  PDF 178 KB (15 pages)
  
  Document Number: ORAUT-OTIB-0047 Rev-00
  
  About this Document: TIB to summarize 1948-1949 monitoring data for the Y-12 site.
  
  Approved: September 20, 2005
  
  
• Historical Evaluation of the Film Badge Dosimetry Program at the Y-12 Plant in Oak Ridge, Tennessee: Part 2 - Neutron Radiation
  PDF 787 KB (56 pages)
  
  Document Number: ORAUT-OTIB-0045 Rev-01
  
  Revised: November 30, 2009
  
  About this Document: Provides information on the Y-12 film badge for the monitoring of neutron radiation. This document was previously an ORAU report converted to ORAUT-OTIB-0045 Rev 01. Revisions include formatting, editorial changes, addition of required language on page 6 in Section 1.0, and a complete rewrite of Section 3.0. New information was added on sources of neutron exposure at the Y-12 site in Table 3.1 of Section 3.0 and a large number of new references were added. Attachment B was also added which provides supporting data on neutron doses to Y-12 workers during the film badge period from another recent study. Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of the document.
  
  
• Historical Evaluation of the Film Badge Dosimetry Program at the Y-12 Plant in Oak Ridge, Tennessee: Part 3 - Beta Radiation
  PDF 1 MB (72 pages)
  
  Document Number: ORAUT-OTIB-0046 Rev-00
  
  About this Document: Provides background information on the Y-12 external dosimetry program related to film badge monitoring of beta radiation. Incorporates formal internal and NIOSH review comments. Attributions and Annotations section added. Added references and made editorial changes. No further changes occurred as a result of formal internal and NIOSH review of the Attributions and Annotations section. There is no change to the assigned dose and no PER is required.
  
  Approved: June 22, 2007
  
  
• Individual Dose Adjustment Procedure for Y-12 Dose Reconstruction
  PDF 148 KB (9 pages)
  
  Document Number: ORAUT-OTIB-0013 Rev-00
  
  About this Document: TIB which describes an individual dose adjustment procedure that can be used as part of the dose reconstruction for certain workers at the Y-12 Plant.
  
  Approved: September 9, 2004
  
  
• Internal Dosimetry Coworker Data for Y-12
  PDF 308 KB (25 pages)
  
  Document Number: ORAUT-OTIB-0029 Rev-00
  
  About this Document: TIB for assignment of Y-12 internal doses based on coworker bioassay data.
  
  Approved: April 5, 2005
  
  
• Potential Missed Dose to Nuclear Weapons Assemblers at the Y-12 Plant During the Period from 1958 to 1990
  PDF 111 KB (10 pages)
  
  Document Number: ORAUT-OTIB-0074 Rev-00
  
  About this Document: New technical information bulletin that provides bounding estimates of potential missed radiation doses to weapons assemblers who worked in the dry room of Building 9204-2 at the Oak Ridge Y-12 Plant during the period from 1958 to 1990.
  
  Approved: March 13, 2009
  
  

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Program Evaluation Reports (PERs) and Program Evaluation Plans (PEPs)

NIOSH is committed to applying the best available science in dose reconstructions. In keeping with this commitment, completed cases with probabilities of causation less than 50% are reviewed as relevant new information becomes available. The results of these reviews are described in a Program Evaluation Report (PER). The PER details the effect, if any, of the new information on the completed dose reconstruction. If it appears that the new information may result in an increase in dose for a completed dose reconstruction with a probability of causation of less than 50%, NIOSH is committed to working with the Department of Labor to reopen and rework the dose reconstruction, as appropriate. A Program Evaluation Plan (PEP) describes plans for evaluating specific program details or issues.

• PER 31: Y-12 TBD Revisions
  PDF 17 KB (2 pages)
  
  Document Number: OCAS-PER-0031 Rev-00
  
  About this Document: Document to determine which previously completed claims require evaluation for the effect of revising the Y-12 Plant TBD.
  
  Approved: December 18, 2007
  
  Summary: There were 693 Y-12 claims completed prior to January 12, 2006, with a probability of causation below 50%. The dose reconstruction methodology of each will be reviewed to determine if a new dose reconstruction is necessary to determine if the revisions increase the dose estimate. NIOSH will review these dose reconstructions to determine if they meet the criterion listed in this PER. NIOSH will provide DOL with the list of 693 claims as well as a determination on each claim as to whether a new dose estimate is required. Documentation for each claim not requiring a new dose reconstruction will provide the basis for that determination.

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Worker Outreach Activities

Based on a recommendation from the Advisory Board to provide workers and site experts with opportunities to participate in developing the technical documents used in dose reconstruction, NIOSH established a Worker Outreach Program.

At Worker Outreach Meetings, current and former DOE and AWE employees have opportunities to obtain information about Site Profiles, Technical Basis Documents, and Technical Information Bulletins, and to provide information for consideration and possible use in dose reconstruction. This process is valuable to ensure that the technical documents used in dose reconstruction contain correct and useful information.

Below are the Worker Outreach Activities for the Y-12 Plant:

• April 5, 2005
  Meeting with Security, Police, and Fire Professionals of America; International Guards Union of America
  
  Final Minutes
  PDF 58 KB (9 pages)
  
  
• November 9, 2004
  Meeting with Y-12 Atomic Trades and Labor Council
  
  Final Minutes
  PDF 43 KB (8 pages)

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Comments on Y-12 Plant Documents

How to Submit Comments
Comments on Y-12 documents can be submitted to the NIOSH Docket Officer electronically by e-mail at NIOCINDOCKET@cdc.gov or printed comments can be mailed to NIOSH Docket Office, Robert A. Taft Laboratories, MS-C34, 4676 Columbia Parkway, Cincinnati, OH 45226. Please include the Site Profile/Docket Number (021) on all comments.

• Letter from Private Citizen
  January 25, 2006
  PDF 652 KB (3 pages)
  
  
• Draft: Y-12 National Security Complex Site Profile Review
  Contract No. 200-2004-03805
  Task Order No. 1
  SCA-TR-TASK1-0007
  September 19, 2005
  PDF 2.35 MB (204 pages)
  
  Attachment 6: Site Expert Review Summary
  PDF 95 KB (22 pages)
  
  
• Comments from a Private Citizen: Comments for the Y-12 National Security Complex Documents
  PDF 101 KB (2 pages)
  
  
• Comments from a Private Citizen: Public Docket Number 021--Comments for the Y-12 National Security Complex Documents
  PDF 45 KB (1 page)
  
  
• Comments from a Private Citizen: Y-12 National Security Complex (NIOSH Docket Number 021) Submission--Health Physics Survey for Uranium Surface Contamination, 10-11-90.
  This document is currently undergoing review and clearance procedures prior to release to the public.
  
  
• Comments from G. Bell: Public Docket Number 021--Comments for the Y-12 National Security Complex Documents.
  This document is currently undergoing review and clearance procedures prior to release to the public.

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Special Exposure Cohort Petition Information for the Y-12 Plant

• SEC Petitions Not Qualifying for Evaluation
  In addition to the petitions listed below, four additional petitions were received but did not qualify for evaluation. Three petitions did not meet the minimum petition requirements and the class defined in the other petition was already included in the SEC.
  
  
• Classes Not Added to the SEC
  
  
  • Y-12 Plant (Statisticians)--The Secretary of HHS determined that the following employees do not meet the statutory criteria for addition to the SEC as authorized under EEOICPA: Statisticians who performed statistical analysis of biological experiments (working within the Oak Ridge National Laboratory Biological Sciences Division) in all locations at the Y-12 Plant in Oak Ridge, Tennessee, who were employed by the Department of Energy or its contractors between January 1, 1958, and June 30, 1958.
    
    
• Classes Added to the SEC
  
  
  • Y-12 Plant (March 1943 through December 1947)--Department of Energy (DOE) employees or DOE contractor or subcontractor employees who worked in uranium enrichment operations or other radiological activities at the Y-12 facility in Oak Ridge, Tennessee from March 1943 through December 1947 and who were employed for a number of work days aggregating at least 250 work days, either solely under this employment or in combination with work days of employment occurring within the parameters (excluding aggregate work day requirements) established for other classes of employees included in the SEC
    
    
  • Y-12 Plant (January 1948 through December 1957)--Department of Energy (DOE) employees or DOE contractor or subcontractor employees who were monitored or should have been monitored for: (1) Thorium exposures while working in Building 9201-3, 9202, 9204-1, 9204-3, 9206, or 9212 at Y-12 for a number of work days aggregating at least 250 work days from January 1948 through December 1957 or in combination with work days within the parameters (excluding aggregate work day requirements) established for one or more classes of employees in the SEC; or (2) Radionuclide exposures associated with cyclotron operations in Building 9201-2 at Y-12 for a number of work days aggregating at least 250 work days from January 1948 through December 1957 or in combination with work days within the parameters (excluding aggregate work day requirements) established for one or more classes of employees in the SEC.
    
    
  • Y-12 Plant (March 1, 1943 through December 31, 1947)--All employees of the Department of Energy (DOE), its predecessor agencies, and DOE contractors or subcontractors who worked at the Y-12 Plant in Oak Ridge, Tennessee from March 1, 1943 through December 31, 1947, for a number of work days aggregating at least 250 work days occurring either solely under this employment or in combination with work days within the parameters established for one or more other classes of employees in the Special Exposure Cohort.
    
    
  • Y-12 Plant (January 1, 1948 through December 31, 1957)--All employees of the Department of Energy, its predecessor agencies, and their contractors and subcontractors who worked at the Y–12 facility in Oak Ridge, Tennessee, during the period from January 1, 1948 through December 31, 1957, for a number of work days aggregating at least 250 work days, occurring either solely under this employment or in combination with work days within the parameters established for one or more other classes of employees in the Special Exposure Cohort.
    
    
• Petitions Qualified for Evaluation
  
  
  1. Locations: Oak Ridge, Tennessee--Building 9201-5 and the Beta Building at Y-12
     
     Job Titles and/or Job Duties: All Control Operators
     
     Period of Employment: January 1944 through December 1945
     
     
     
  2. Location: Oak Ridge, Tennessee
     
     Job Titles and/or Job Duties: All Tennessee Eastman Corporation employees that conducted laboratory equipment cleaning work
     
     Period of Employment: From 1943 through 1947
     
     
     
  3. Job Titles and/or Job Duties: All steamfitters, pipefitters, and plumbers
     
     Period of Employment: October 1944 through December 1957
     
     
     
  4. Location: Oak Ridge, Tennessee
     
     Job Titles and/or Job Duties: All statisticians in all locations
     
     Period of Employment: January 1, 1951 through June 30, 1959
     
     
     
  5. Location: Oak Ridge, Tennessee
     
     Job Titles and/or Job Duties: All workers
     
     Period of Employment: March 1, 1943 through December 31, 1947
     
     
     
  6. Location: Oak Ridge, Tennessee
     
     Job Titles and/or Job Duties: All workers potentially exposed to radioactive materials
     
     Period of Employment: January 1, 1948 through December 31, 1957
     
     
  Note: Petitions 1 and 2 were merged together
  
  
• Federal Register Notice Announcing that the Y-12 Plant SEC Petitions met the Minimum Qualifications for Review and Evaluation
  
  
  1. Control Operators; January 1944 through December 1945
     (April 7, 2005)
     PDF 52 KB (1 page)
     
     
  2. Tennessee Eastman Corporation employees that conducted laboratory equipment cleaning work; 1943-1947
     (June 6, 2005)
     PDF 62 KB (2 pages)
     
     
  3. Steamfitters, Pipefitters, and Plumbers; October, 1944 through December, 1957
     (June 6, 2005)
     PDF 81 KB (2 pages)
     
     
  4. Statiticians; January 1, 1951 through June 30, 1959
     (February 9, 2007)
     PDF 64 KB (1 page)
     
     
  5. All workers; March 1, 1943 through December 31, 1947
     (October 3, 2007)
     PDF 51 KB (1 page)
     
     
  6. All workers potentially exposed to radioactive materials; January 1, 1948 through December 31, 1957
     (May 6, 2011)
     PDF 68 KB (1 page)
     
     
• Copy of the Petitions Received
  
  
  1. Control Operators; January 1944 through December 1945
     (November 24, 2004)
     PDF 404 KB (8 pages)
     
     
  2. Tennessee Eastman Corporation employees that conducted laboratory equipment cleaning work; 1943 through 1947
     (February 8, 2005)
     PDF 1.7 MB (33 pages)
     
     
  3. Steamfitters, Pipefitters, and Plumbers; October 1944 through December 1957
     (February 15, 2005)
     PDF 1.6 MB (31 pages)
     
     
  4. Statiticians; January 1, 1951 through June 30, 1959
     (July 28, 2005)
     PDF 935 KB (19 pages)
     
     
  5. All workers; March 1, 1943 through December 31, 1947
     (September 20, 2007)
     PDF 564 KB (4 pages)
     
     
  6. All workers potentially exposed to radioactive materials; January 1, 1948 through December 31, 1957
     (April 22, 2011)
     PDF 181 KB (3 pages)
     
     
• SEC Petition Evaluation Report
  
  
  1. All DOE, DOE contractors, or subcontractors, or AWE employees who worked in uranium enrichment operations or other radiological activities at the Y-12 facility in Oak Ridge, Tennessee; January 1943 through December 1947
     (June 13, 2005)
     PDF 107 KB (25 pages)
     
     (Note: The evaluation was expanded to cover the entire "calutron" period of uranium enrichment operations at the Y-12 facility. In addition, the class start date was changed based on the completion of the Pilot Plant building shell in March 1943.)
     
     
  2. Tennessee Eastman Corporation employees that conducted laboratory equipment cleaning work; 1943 through 1947
     
     (Note: Merged with Petition 1.)
     
     
  3. Employees of the DOE or DOE contractors or subcontractors who were monitored or should have been monitored for thorium exposures while working in Building 9202, 9204-1, 9204-3, 9206, or 9212 at Y-12; January 1948 through December 1957
     (April 7, 2006)
     PDF 235 KB (46 pages)
     
     
     • Appendix 1
        PDF 1.24 MB (81 pages)
       
       
     • Appendix 2
        PDF 158 KB (21 pages)
       
       
     Supplement to Y-12 SEC Petition (October 1944 through December 1957)
     (June 8, 2006)
     PDF 60 KB (5 pages)
     
     (Note: Based on its research, NIOSH reduced the requested class because the feasibility of performing dose reconstruction for all workers employed from March 1943 through December 1947 was already addressed in the SEC Petition Evaluation Report 1 listed above.)
     
     
  4. All statisticians who performed statistical analysis of biological experiments (working within the Oak Ridge National Laboratory Biological Sciences Division) in all locations at the Y-12 Plant in Oak Ridge, Tennessee, who were employed by DOE or its contractors between January 1, 1958 and June 30, 1958
     (June 29, 2007)
     PDF 316 KB (34 pages)
     
     (Note: Based on its research, NIOSH reduced the petitioner-requested class to define a single class of employees for which NIOSH can estimate radiation doses with sufficient accuracy. The time period of the class was reduced because of the petition basis that one or more members of the class might have incurred a high level radiation dose from an unmonitored exposure incident in the first or second quarter of 1958.)
     
     
  5. All workers; March 1, 1943 through December 31, 1947
     (June 6, 2008)
     PDF 132 KB (19 pages)
     
     
  6. All workers; January 1, 1948 through December 31, 1957
     (July 19, 2011)
     PDF 1 MB (73 pages)
     
     
• Petition Discussed by the Advisory Board
  
  
  1. All DOE, DOE contractors, or subcontractors, or AWE employees who worked in uranium enrichment operations or other radiological activities at the Y-12 facility in Oak Ridge, Tennessee; January 1943
     
     The Advisory Board discussed the Y-12 Plant Petition (March 1943 to December 1947) on July 5, 2005. A copy of the transcript from the July 5, 2005, Advisory Board meeting is below:
     
     July 5, 2005
     PDF 455 KB (253 pages)
     
     
  2. Tennessee Eastman Corporation employees that conducted laboratory equipment cleaning work; 1943 through 1947
     
     (Note: Merged with Petition 1.)
     
     
  3. The Advisory Board discussed the Y-12 Plant Petition (1948-1957) on April 26, 2006 and June 15, 2006. A copy of the transcript from the April 26, 2006, Advisory Board meeting is below:
     
     April 26, 2006
     PDF 793 KB (436 pages)
     
     
  4. All statisticians who performed statistical analysis of biological experiments (working within the Oak Ridge National Laboratory Biological Sciences Division) in all locations at the Y-12 Plant in Oak Ridge, Tennessee, who were employed by DOE or its contractors between January 1, 1958 and June 30, 1958
     
     The petition was discussed by the Advisory Board on October 4, 2007, during its regular meeting.
     
     
  5. All workers; March 1, 1943 through December 31, 1947
     
     The petition was discussed by the Board on June 24, 2008, during its regular meeting.
     
     
  6. All workers; January 1, 1948 through December 31, 1957
     
     The petition was discussed by the Advisory Board on August 23, 2011, during its regular meeting.
     
     
• Advisory Board Recommendation on SEC Petition
  
  
  1. All DOE, DOE contractors, or subcontractors, or AWE employees who worked in uranium enrichment operations or other radiological activities at the Y-12 facility in Oak Ridge, Tennessee; January 1943 through December 1947
     (July 26, 2005)
     PDF 94 KB (2 pages)
     
     
  2. Not applicable. Merged with Petition 1.
     
     
  3. Employees of the DOE or DOE contractors or subcontractors who were monitored or should have been monitored for thorium exposures while working in Building 9202, 9204-1, 9204-3, 9206, or 9212 at Y-12; January 1948 through December 1957; or radionuclide exposures associated with cyclotron operations in Building 9201-2 at Y-12 from January 1948 through December 1957
     (July 5, 2006)
     PDF 258 KB (2 pages)
     
     
  4. All statisticians who performed statistical analysis of biological experiments (working within the Oak Ridge National Laboratory Biological Sciences Division) in all locations at the Y-12 Plant in Oak Ridge, Tennessee, who were employed by DOE or its contractors between January 1, 1958 and June 30, 1958
     (October 26, 2007)
     PDF 189 KB (1 page)
     
     
  5. All employees of the Department of Energy (DOE), its predecessor agencies, and DOE contractors and subcontractors who worked at the Y-12 Plant in Oak Ridge, Tennessee from March 1, 1943 through December 31, 1947 for a number of work days aggregating at least 250 work days, occurring either solely under this employment , or in combination with work days within the parameters established for other classes of employees in the Special Exposure Cohort
     (July 12, 2008)
     PDF 39 KB (2 pages)
     
     
  6. All employees of the Department of Energy, its predecessor agencies, and their contractors and subcontractors who worked at the Y-12 facility in Oak Ridge, Tennessee, during the period from January 1, 1948 through December 31, 1957, for a number of work days aggregating at least 250 work days, occurring either solely under this employment or in combination with work days within the parameters established for one or more other classes of employees included in the Special Exposure Cohort
     (September 14, 2011)
     PDF 48 KB (2 pages)
     
     
• HHS Letters to Congress Regarding the SEC Petition
  
  
  1. All DOE, DOE contractors, or subcontractors employees who worked in uranium enrichment operations or other radiological activities at the Y-12 facility in Oak Ridge, Tennessee; January 1943 through December 1947
     (August 25, 2005)
     PDF 399 KB (11 pages)
     
     
  2. Not applicable. Merged with Petition 1.
     
     
  3. Employees of the DOE or DOE contractors or subcontractors who were monitored or should have been monitored for (1) thorium exposures while working in Building 9201-3, 9202, 9204-1, 9204-3, 9206, or 9212 at Y-12 (January 1948 through December 1957); or radionuclide exposures associated with cyclotron operations in Building 9201-2 at Y-12 (January 1948 through December 1957)
     (August 8, 2006)
     PDF 271 KB (6 pages)
     
     
  4. Statisticians who performed statistical analysis of biological experiments in all locations at the Y-12 Plant between January 1, 1958, and June 30, 1958
     (December 14, 2007)
     PDF 376 KB (9 pages)
     
     
  5. All workers; March 1, 1943 through December 31, 1947
     (August 15, 2008)
     PDF 459 KB (10 pages)
     
     
  6. All workers; January 1, 1948 through December 31, 1957
     (October 18, 2011)
     PDF 103 KB (10 pages)
     
     
• Federal Register Notice: Designation of a Class of Employees for Addition to the Special Exposure Cohort
  
  
  1. Department of Energy (DOE) employees or DOE contractor or subcontractor employees who worked in uranium enrichment operations or other radiological activities at the Y-12 facility in Oak Ridge, Tennessee from March 1943 through December 1947
     (September 27, 2005)
     PDF 45 KB (1 page)
     
     
  2. Not applicable. Merged with Petition 1.
     
     
  3. Employees of the DOE or DOE contractors or subcontractors who were monitored or should have been monitored for (1) thorium exposures while working in Building 9201-3, 9202, 9204-1, 9204-3, 9206, or 9212 at Y-12 (January 1948 through December 1957); or radionuclide exposures associated with cyclotron operations in Building 9201-2 at Y-12 (January 1948 through December 1957)
     (September 7, 2006)
     PDF 46 KB (1 page)
     
     
  4. Not applicable.
     (Note: this only applies if the class is added to the SEC.)
     
     
  5. All workers; March 1,1943 through December 31, 1947
     (August 28, 2008)
     PDF 51 KB (1 page)
     
     
  6. All workers; January 1, 1948 through December 31, 1957
     (November 4, 2011)
     PDF 50 KB (1 page)
     
     
• Federal Register Notice: Determination Concerning a Petition to Add a Class of Employees to the Special Exposure Cohort
  
  
  1. Not applicable.
     (Note: this only applies if the class is not added to the SEC.)
     
     
  2. Not applicable. Merged with Petition 1.
     
     
  3. Not applicable.
     (Note: this only applies if the class is not added to the SEC.)
     
     
  4. Federal Register Notice published announcing the determination concerning a petition to add a class of employees to the SEC from the Y-12 Plant (Statisticians who performed statistical analysis of biological experiments (working within the Oak Ridge National Laboratory Biological Sciences Division) in all locations at the Y-12 Plant in Oak Ridge, Tennessee, who were employed by the Department of Energy or its contractors between January 1, 1958, and June 30, 1958)
     (January 23, 2008)
     PDF 60 KB (1 page)
     
     
  5. Not applicable.
     (Note: this only applies if the class is not added to the SEC.)
     
     
  6. Not applicable.
     (Note: this only applies if the class is not added to the SEC.)
     
     
• HHS Designation of Additional Members to the SEC
  
  
  1. HHS Designation of Additional Members from the Y-12 Plant: Department of Energy (DOE) employees or DOE contractor or subcontractor employees who worked in uranium enrichment operations or other radiological activities at the Y-12 facility in Oak Ridge, Tennessee from March 1943 through December 1947
     (August 25, 2005)
     PDF 406 KB (4 pages)
     
     
  2. Not applicable. Merged with Petition 1.
     
     
  3. HHS Designation of a Class of Employees from Y-12 Plant: Employees of the DOE or DOE contractors or subcontractors who were monitored or should have been monitored for (1) thorium exposures while working in Building 9201-3, 9202, 9204-1, 9204-3, 9206, or 9212 at Y-12 (January 1948 through December 1957); or radionuclide exposures associated with cyclotron operations in Building 9201-2 at Y-12 (January 1948 through December 1957)
     (August 8, 2006)
     PDF 172 KB (4 pages)
     
     
  4. Not applicable. Class was not added to the SEC.
     (Note: this only applies if the class is added to the SEC.)
     
     
  5. HHS Designation of Additional Members from the Y-12 Plant: All workers (March 1,1943 through December 31, 1947)
     (August 15, 2008)
     PDF 258 KB (5 pages)
     
     
  6. HHS Designation of Additional Members from the Y-12 Plant: All workers (January 1, 1948 through December 31, 1957)
     (October 18, 2011)
     PDF 41 KB (5 pages)
     
     
• HHS Determination of Additional Members to the SEC
  
  
  1. Not applicable.
     (Note: this only applies if the class is not added to the SEC.)
     
     
  2. Not applicable. Merged with Petition 1.
     
     
  3. Not applicable.
     (Note: this only applies if the class is not added to the SEC.)
     
     
  4. HHS Determination of a Class of Employees from Y-12 Plant (Statisticians who performed statistical analysis of biological experiments (working within the Oak Ridge National Laboratory Biological Sciences Division) in all locations at the Y-12 Plant in Oak Ridge, Tennessee, who were employed by the Department of Energy or its contractors between January 1, 1958, and June 30, 1958)
     (December 14, 2007)
     PDF 152 KB (4 pages)
     
     
  5. Not applicable.
     (Note: this only applies if the class is not added to the SEC.)
     
     
  6. Not applicable.
     (Note: this only applies if the class is not added to the SEC.)
     
     
• Effective Date for the SEC Class
  
  
  1. September 24, 2005: Department of Energy (DOE) employees or DOE contractor or subcontractor employees who worked in uranium enrichment operations or other radiological activities at the Y-12 facility in Oak Ridge, Tennessee from March 1943 through December 1947
     
     
  2. Not applicable. Merged with Petition 1.
     
     
  3. September 7, 2006: HHS Designation of a Class of Employees from Y-12 Plant: Employees of the DOE or DOE contractors or subcontractors who were monitored or should have been monitored for (1) thorium exposures while working in Building 9201-3, 9202, 9204-1, 9204-3, 9206, or 9212 at Y-12 (January 1948 through December 1957; or radionuclide exposures associated with cyclotron operations in Building 9201-2 at Y-12 (January 1948 through December 1957))
     
     
  4. Not applicable.
     (Note: this only applies if the class is added to the SEC. This class was not added to the SEC.)
     
     
  5. September 14, 2008: All workers (March 1,1943 through December 31, 1947)
     
     
  6. November 17, 2011 (January 1, 1948 through December 31, 1957)
     
     
• Federal Register Notice: Final Effect of Designation of a Class of Employees for Addition to the Special Exposure Cohort
  
  
  1. Department of Energy (DOE) employees or DOE contractor or subcontractor employees who worked in uranium enrichment operations or other radiological activities at the Y-12 facility in Oak Ridge, Tennessee from March 1943 through December 1947
     (October 3, 2005)
     PDF 46 KB (1 page)
     
     
  2. Not applicable. Merged with Petition 1.
     
     
  3. Employees of the DOE or DOE contractors or subcontractors who were monitored or should have been monitored for (1) thorium exposures while working in Building 9201-3, 9202, 9204-1, 9204-3, 9206, or 9212 at Y-12 (January 1948 through December 1957); or radionuclide exposures associated with cyclotron operations in Building 9201-2 at Y-12 (January 1948 through December 1957)
     (September 22, 2006)
     PDF 46 KB (1 page)
     
     
  4. Not applicable.
     (Note: this only applies if the class is added to the SEC. This class was not added to the SEC.)
     
     
  5. All workers (March 1,1943 through December 31, 1947)
     (October 8, 2008)
     PDF 57 KB (2 pages)
     
     
  6. All workers (January 1, 1948 through December 31, 1957)
     (November 28, 2011)
     PDF 167 KB (1 page)
     
     
• Letter to DOL Regarding the Addition of a New Class of Employees to the SEC
  
  
  1. Y-12 Plant March 1943 to December 1947
     (October 3, 2005)
     PDF 17 KB (1 page)
     
     
  2. Not applicable. Merged with Petition 1.
     
     
  3. Y-12 Plant January 1948 through December 1957
     (September 12, 2006)
     PDF 46 KB (2 pages)
     
     
  4. Not applicable.
     (Note: this only applies if the class is added to the SEC. This class was not added to the SEC.)
     
     
  5. Y-12 Plant March 1, 1943 through December 31, 1947
     (September 22, 2008)
     PDF 17 KB (1 page)
     
     
  6. Y-12 Plant January 1, 1948 through December 31, 1957
     (November 17, 2011)
     PDF 29 KB (1 page)
     
     
• Letter from DOL Regarding the Return of All Cases for the New SEC Class
  
  
  1. Department of Energy (DOE) employees or DOE contractor or subcontractor employees who worked in uranium enrichment operations or other radiological activities at the Y-12 facility in Oak Ridge, Tennessee from March 1943 through December 1947
     (October 3, 2005)
     PDF 506 KB (4 pages)
     
     
  2. Not applicable. Merged with Petition 1.
     
     
  3. Not available at this time.
     
     
  4. Not available at this time.
     
     
  5. Not available at this time.
     
     
  6. Not available at this time.

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Previous Versions of Y-12 Plant Documents

• Site Profile: Introduction section
  
  
  • Page Change Revision October 11, 2005
    PDF 90 KB (7 pages)
    
    Page Change Revision Includes: Page change initiated to incorporate recent direction from NIOSH to include details for the definition of a DOE facility on pages 4 and 5. No sections were deleted.
    
    
  • Page Change Revision November 24, 2004
    PDF 78 KB (7 pages)
    
    Page Change Revision Includes: Deletes acronyms and abbreviations for DOL IREP, and Office Worker Compensation Program on page 3. Revises information on page 4 to incorporate changes from DOL and NIOSH Office of General Counsel.
    
    
  • Approved January 6, 2004
    PDF 77 KB (7 pages)
    
    
• Site Profile: Site Description section
  
  
  • Page Change Revision October 25, 2006
    PDF 447 KB (35 pages)
    
    Page Change Revision Includes: Adds Purpose and Scope Sections on page 8; text and tables were modified to clarify the use of the term recycled uranium and when it was present on the site; and text was added or modified on pages 7 and 8 in Section 2.1. Section 2.4.4 was incorporated into Section 2.4.3. Changes occurred on pages 11-19 and 32-34. This revision results in no change to the assigned dose and no PER is required. The document was revised in response to comments from NIOSH during formal review.
    
    
  • Page Change Revision October 11, 2005
    PDF 293 KB (33 pages)
    
    Page Change Revision Includes: Page change initiated to incorporate the definition of U.S.C. on page 5 and details for the definition of a DOE facility on pages 6 and 7. No sections were deleted.
    
    
  • Page Change Revision January 19, 2005
    PDF 136 KB (33 pages)
    
    Page Change Revision Includes: Revises document to incorporate changes from NIOSH Office of General Counsel, to include a glossary and additional acronyms, to delete two unused references and add one new reference, to update the contents, and to make editorial changes.
    
    
  • Page Change Revision September 9, 2004
    PDF 259 KB (30 pages)
    
    Page Change Revision Includes: Deletes unused reference on page 22.
    
    
  • Approved November 19, 2003
    PDF 204 KB (30 pages)
    
    
• Site Profile: Occupational Medical Dose section
  
  
  • Page Change Revision April 18, 2006
    PDF 175 KB (20 pages)
    
    Page Change Revision Includes: Page change initiated to revise text in Table 3-5 on page 10 in Section 3.4 to remove reference that uterus is a surrogate for ovaries. No changes occurred as a result of formal internal review. No sections were deleted. Text on page 10 was revised in response to NIOSH formal review.
    
    
  • Page Change Revision October 11, 2005)
    PDF 163 KB (19 pages)
    
    Page Change Revision Includes: Page change initiated to incorporate the definition of U.S.C. on page 4 and details for the definition of a DOE facility on page 5. No sections were deleted.
    
    
  • Page Change Revision September 9, 2004
    PDF 144 KB (18 pages)
    
    Page Change Revision Includes: Deletes references to Kathren et al., to be published on pages 7, 11, 17 and 18. This document has not been published. Adds references on pages 7, 11, 17 and 18 for ORAU (Oak Ridge Associated Universities) 2003, Technical Information Bulletin: Dose Reconstruction from Occupationally Related Diagnostic X-ray Procedures, ORAUT-OTIB-0006 Rev 00, Oak Ridge, Tennessee. November 14, 2003.
    
    
  • Approved December 15, 2003
    PDF 178 KB (19 pages)
    
    
• Site Profile: Occupational Environmental Dose section
  
  
  • Page Change Revision October 11, 2005
    PDF 905 KB (47 pages)
    
    Page Change Revision Includes: Page change initiated to incorporate the definition of U.S.C. on page 5 and details for the definition of a DOE facility on page 6. No sections were deleted.
    
    
  • Page Change Revision September 9, 2004
    PDF 912 KB (46 pages)
    
    Page Change Revision Includes: Corrects last column on page 11. Heading of last column changed from μCi cm^-3 to μg cm^-3.
    
    
  • Page Change May 20, 2004
    PDF 897 KB (46 pages)
    
    Page Change Revision Includes: Corrects 3rd column on page 46, dose rate excluding background column from mrem h^-1 to μrem h^-1. Adds grid lines to Table D-7.
    
    
  • Approved December 5, 2003
    PDF 806 KB (45 pages)
    
    
• Site Profile: Occupational Internal Dose section
  
  
  • Revised August 3, 2006
    PDF 748 KB (47 pages)
    
    Revision Includes: Revised to incorporate additional directions for dose construction for non-presumptive cancers that are excluded from the 1943 through 1947 Special Exposure Cohort. Approved issue of Revision 02. Removed Section 5.4 from the text and Table of Contents, as the most recent page change addresses 1943-1947, and coworker data are used for 1948 to 1950, as specified in the coworker TIB. Incorporates NIOSH formal review comments. This revision results in no change to the assigned dose.
    
    
  • Page Change Revision February 14, 2006
    PDF 471 KB (46 pages)
    
    Page Change Revision Includes: Approved page change revision. Page changes initiated to incorporate definitions and directions for dose reconstruction for non-presumptive cancers that are excluded from the 1943 through 1947 Special Exposure Cohort. Affected pages are: page 7, page 9 in Section 5.1, pages 20 and 21 in Section 5.2.1.1, and page 36 in the Reference Section. No sections were deleted.
    
    
  • Page Change Revision January 12, 2006
    PDF 557 KB (45 pages)
    
    Page Change Revision Includes: No changes occurred as a result of formal internal review. Page change initiated to make minor changes to text in Section 5.1, page 7. Deletes and adds text about the default value for the Th-228/Th-232 equilibrium ratio for lung counts in Section 5.3, page 31. Adds new Figure 5.4. - variation of activity in natural thorium after a single purification on page 31. Also, changes date in C. M. West reference on page 36. No sections were deleted.
    
    
  • Page Change Revision October 11, 2005
    PDF 419 KB (44 pages)
    
    Page Change Revision Includes: Page change initiated to incorporate the definition of U.S.C. on page 6 and details for the definition of a DOE facility on page 7. No sections were deleted.
    
    
  • Revised May 10, 2005
    PDF 400 KB (44 pages)
    
    Revision Includes: First revision to include table numbers and titles in the body of the document.
    
    
• Site Profile: Occupational External Dose section
  
  
  • Revised June 2, 2009
    PDF 454 KB (56 pages)
    
    Revision Includes: Revision to add Section 6.1.3.3 and Attachment B to address the Special Exposure Cohort (SEC-00098). Updates required language and adds purpose and scope in Section 6.1. Revised to incorporate additional directions for dose reconstruction for nonpresumptive cancers that are excluded from the March 1, 1943, through December 31, 1947, Special Exposure Cohort in Section 6.1.3.3. Adds Attributions and Annotations Section. Incorporates formal internal and NIOSH review comments.
    
    
  • Page Change Revision May 11, 2006
    PDF 363 KB (50 pages)
    
    Page Change Revision Includes: Updates required language in Introduction (Section 6.1) on page 9. Revised to incorporate additional directions for dose reconstruction for non-presumptive cancers that are excluded from the 1943 through 1947 Special Exposure Cohort on page 10 Section 6.1. Revised to delete text on page 10 in Section 6.1, specified in comments from OCAS review. No sections were deleted.
    
    
  • Page Change Revision February 14, 2006
    PDF 358 KB (49 pages)
    
    Page Change Revision Includes: Approved page change revision. Page changes initiated to incorporate definitions and directions for dose reconstruction for non-presumptive cancers that are excluded from the 1943 through 1947 Special Exposure Cohort. Affected pages are: page 7, pages 8 and 9 in Section 6.1. No sections were deleted.
    
    
  • Page Change Revision October 11, 2005
    PDF 360 KB (48 pages)
    
    Page Change Revision Includes: Page change initiated to incorporate the definition of U.S.C. on page 7 and details for the definition of a DOE facility on page 8. No sections were deleted.
    
    
  • Approved November 19, 2003
    PDF 318 KB (47 pages)
    
    
• Technical Information Bulletin: Coworker External Dosimetry Data for the Y-12 National Security Complex
  
  
  • Approved: August 3, 2009
    PDF 288 KB (21 pages)
    
    Document Number: ORAUT-OTIB-0064 Rev-00
    
    About this Document: Provides background information on the Y-12 coworker external dosimetry data and includes tables with annual values that may be used in the process of assigning doses for unmonitored years of employment.

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