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NIOSH Program Area:

Radiation Dose Reconstruction

 

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

Location: Oak Ridge, Tennessee

Site Profile

  1. Introduction
    (Revised October 24, 2006)
    this document in PDF 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)
    this document in PDF 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)
    this document in PDF 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)
    this document in PDF 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
    (Revised March 12, 2012)
    this document in PDF PDF 968 KB (79 pages)

    Revision Includes: Addition of new SEC designation to Section 5.1.3 to clarify, correct, and update the SEC class of covered employees. Added U-232 exception to Section 5.2.2. Added internal coworker study (formerly ORAUT-OTIB-0029) as Attachment B. Revision initiated to add Attributions and Annotations section and make minor editorial corrections. Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of the document.

  6. Occupational External Dose
    (Revised December 18, 2009)
    this document in PDF 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

    Document Number: ORAUT-OTIB-0015 Rev-00

    This document has been canceled. Bayesian methods are no longer used for dose reconstructions. Therefore, information in ORAUT-OTIB-0015 Rev-00 is no longer relevant.

    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
    this document in PDF PDF 457 KB (35 pages)

    Document Number: ORAUT-OTIB-0064 Rev-02

    Revised: April 29, 2013

    Revision Includes: Updates Section 6.1 and adds update of previous ORAUT-OTIB-0047, Rev 00 as Attachment A. No sections were deleted. No changes occurred as a result of formal internal review. Incorporates formal NIOSH review comments. Constitutes a total rewrite of the document.


  • Effect of Threshold Energy and Angular Response of NTA Film on Missed Neutron Dose at the Oak Ridge Y-12 Facility
    this document in PDF 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
    this document in PDF 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--CANCELED

    Document Number: ORAUT-OTIB-0047 Rev-00

    Note: This document has been canceled. There is no longer a need to keep this technical information bulletin as a stand-alone document. The information about the methods contained in this document has been incorporated into ORAUT-OTIB-0064 Rev. 02, Coworker External Dosimetry Data for the Y-12 National Security Complex. Previous versions of this document are located on this page under the Previous Versions of Y-12 Plant Documents section.


  • Historical Evaluation of the Film Badge Dosimetry Program at the Y-12 Plant in Oak Ridge, Tennessee: Part 1 - Gamma Radiation
    this document in PDF PDF 1 MB (104 pages)

    Document Number: ORAUT-OTIB-0044 Rev-01

    Revised: April 29, 2013

    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 2 - Neutron Radiation
    this document in PDF 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
    this document in PDF 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--CANCELED

    Document Number: ORAUT-OTIB-0013 Rev-00

    Note: This document has been canceled. There is no longer a need to keep this information in a stand-alone document. The information about the methods contained in this document has been incorporated into ORAUT-OTIB-0064 Rev 01, Coworker External Dosimetry Data for the Y-12 National Security Complex.


  • Internal Dosimetry Coworker Data for Y-12

    Document Number: ORAUT-OTIB-0029 Rev-00

    This document has been canceled. There is no longer a need to keep this information in a stand-alone document. The information contained in this document has been incorporated into the Y-12 National Security Complex Occupational Internal Dose Technical Basis Document, ORAUT-TKBS-0014-5 Rev 03.

    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
    this document in PDF 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
    this document in PDF 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
    this document in PDF PDF 58 KB (9 pages)

  • November 9, 2004
    Meeting with Y-12 Atomic Trades and Labor Council

    Final Minutes
    this document in PDF PDF 43 KB (8 pages)

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Advisory Board and NIOSH Comments and Discussion Papers on the Y-12 Plant

The Y-12 Plant discussion papers listed below are working documents prepared by NIOSH or its contractor for use in discussions with the Advisory Board on Radiation and Worker Health or its Working Groups or Subcommittees. Draft, preliminary, interim, and white paper documents are not final NIOSH or Advisory Board (or their technical support and review contractors) positions unless specifically marked as such. These documents represent preliminary positions taken on technical issues prepared by NIOSH or its contractor.

The discussion papers have been reviewed to identify and redact any information that is protected by the Privacy Act 5 USC 552a and have been cleared for distribution.

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Public 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.

Comments Received

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Special Exposure Cohort Petition Information for the Y-12 Plant

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Previous Versions of Y-12 Plant Documents

  • Site Profile: Introduction section

    • Page Change Revision October 11, 2005
      this document in PDF 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
      this document in PDF 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
      this document in PDF PDF 77 KB (7 pages)


  • Site Profile: Site Description section

    • Page Change Revision October 25, 2006
      this document in PDF 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
      this document in PDF 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
      this document in PDF 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
      this document in PDF PDF 259 KB (30 pages)

      Page Change Revision Includes: Deletes unused reference on page 22.

    • Approved November 19, 2003
      this document in PDF PDF 204 KB (30 pages)


  • Site Profile: Occupational Medical Dose section

    • Page Change Revision April 18, 2006
      this document in PDF 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)
      this document in PDF 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
      this document in PDF 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
      this document in PDF PDF 178 KB (19 pages)


  • Site Profile: Occupational Environmental Dose section

    • Page Change Revision October 11, 2005
      this document in PDF 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
      this document in PDF 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
      this document in PDF 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
      this document in PDF PDF 806 KB (45 pages)


  • Site Profile: Occupational Internal Dose section

    • Page Change Revision October 10, 2006)
      this document in PDF 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.

    • Revised August 3, 2006
      this document in PDF 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
      this document in PDF 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
      this document in PDF 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
      this document in PDF 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
      this document in PDF 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
      this document in PDF 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
      this document in PDF 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
      this document in PDF 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
      this document in PDF 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
      this document in PDF PDF 318 KB (47 pages)


  • Technical Information Bulletin 64: Coworker External Dosimetry Data for the Y-12 National Security Complex

    • Revised December 18, 2009
      this document in PDF PDF 431 KB (21 pages)

      Document Number: ORAUT-OTIB-0064 Rev-01

      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.

    • Approved: August 3, 2009
      this document in PDF 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.



  • Technical Information Bulletin 47: External Radiation Monitoring at the Y-12 Facility During the 1948-1949 Period--CANCELED

    • Approved September 20, 2005
      this document in PDF PDF 178 KB (15 pages)

      Document Number: ORAUT-OTIB-0047 Rev-00

      About this Document: Summarizes 1948-1949 monitoring data for the Y-12 site.

      Note: This document has been canceled. There is no longer a need to keep this technical information bulletin as a stand-alone document. The information about the methods contained in this document has been incorporated into ORAUT-OTIB-0064 Rev. 02, Coworker External Dosimetry Data for the Y-12 National Security Complex.


  • Technical Information Bulletin 13: Individual Dose Adjustment Procedure for Y-12 Dose Reconstruction--CANCELED

    • September 9, 2004
      this document in PDF PDF 148 KB (9 pages)

      Document Number: ORAUT-OTIB-0013 Rev-00

      About this Document: Describes an individual dose adjustment procedure that can be used as part of the dose reconstruction for certain workers at the Y-12 Plant.

      Note: This document has been canceled. There is no longer a need to keep this information in a stand-alone document. The information about the methods contained in this document has been incorporated into ORAUT-OTIB-0064 Rev 01, Coworker External Dosimetry Data for the Y-12 National Security Complex.


  • Technical Information Bulletin 29: Internal Dosimetry Coworker Data for Y-12

    • Approved: April 5, 2005
      this document in PDF 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.

      Note: This document has been canceled. There is no longer a need to keep this information in a stand-alone document. The information contained in this document has been incorporated into the Y-12 National Security Complex – Occupational Internal Dose Technical Basis Document, ORAUT-TKBS-0014-5 Rev 03.

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Page last updated: March 21, 2014
Page last reviewed: August 10, 2013
Content Source: National Institute for Occupational Safety and Health (NIOSH) Division of Compensation Analysis and Support