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National Institute for Occupational Safety and Health (NIOSH)
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NIOSH Program Area:

Radiation Dose Reconstruction

 

Pantex Plant
(Site Profile/Docket Number 031)

Location: Amarillo, Texas

Site Profile

  1. Introduction
    (Revised May 11, 2007)
    this document in PDF PDF 110 KB (11 pages)

    Revision Includes: Includes Attribution and Annotation section. Constitutes a total rewrite of the document. Incorporates formal internal review comments. This revision results in no change to the assigned dose and no PER is required.


  2. Site Description
    (Revised May 8, 2007)
    this document in PDF PDF 496 KB (21 pages)

    Revision Includes: Incorporates Attributions and Annotations, Purpose and Scope Sections. Constitutes a total rewrite of the document. Incorporates formal internal review comments. This revision results in no change to the assigned dose and no PER is required.

  3. Occupational Medical Dose
    (Revised March 20, 2014)
    this document in PDF PDF 202 KB (21 pages)

    Revision Includes: Revision to ensure organ doses are calculated according to current project practices and according to accumulated historical evidence, to add skin doses for all projections and time periods, and to add dose to the B-lymphocytes. Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of document.

  4. Occupational Environmental Dose
    (January 3, 2014)
    this document in PDF PDF 970 KB (42 pages)

    Revision Includes: Clarifies dose assignments. Updates Section 4.1. Adds paragraphs to Attachment A for clarification of dose assignments. Updates format; includes editorial changes. Adds Tables A-3 and A-4 to simplify on-site ambient dose assignment. Figure 4-4 was deleted. Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of the document.

  5. Occupational Internal Dose
    (January 3, 2014)
    this document in PDF PDF 661 KB (48 pages)

    Revision Includes: Adds section detailing the Special Exposure Cohort classes and limitations for internal dose assessment from intakes before 1991. Revises Sections 5.2.1 through 5.2.3 to reflect assessment of internal radiation dose only if monitoring data are available for all periods after the end of the SEC periods (1991). Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of the document.

  6. Occupational External Dose
    (Revised June 22, 2007)
    this document in PDF PDF 838 KB (75 pages)

    Revision Includes: Incorporates Attributions and Annotations section. Constitutes a total rewrite of the document. Added references and made editorial changes. Modified Table 6-1 average total dose for 1958, 1977, 1983, and 1997. Modified Table 6-9 to add Radiography NDE. No further changes occurred as a result of formal internal review. Incorporates formal NIOSH review comments. This revision results in no change to the assigned dose and no PER is required. Training required: As determined by the Task Manager. Initiated

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Technical Information Bulletins (TIBs)

At the current time, there are no TIBs for the Pantex Plant.

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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 26: Pantex TBD Revision - ORAUT-TKBS-0013
    this document in PDF PDF 16 KB (2 pages)

    Document Number: OCAS-PER-026 Rev-00

    About this Document: New document to determine which previously completed claims require evaluation for the effect of revising the Pantex Plant TBD.

    Approved: October 31, 2007

    Summary: There were 50 Pantex claims meeting the employment dates and target organ criteria above that were completed with a probability of causation below 50% prior to February 1, 2007. NIOSH will review the records of each claim to determine if the dose assigned in the revised TBD is higher than that assigned in the dose reconstruction. NIOSH will provide DOL with the list of 50 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 Pantex Plant:

  • January 29, 2008 (7:00 p.m.)
    Meeting with Workers and former workers from the Pantex Plant and other interested parties, Ashmore Inn & Suites, Amarillo, Texas

    Final Minutes
    this document in PDF PDF 70 KB (18 pages)

  • January 29, 2008 (2:00 p.m.)
    Meeting with Workers and former workers from the Pantex Plant and other interested parties, Ashmore Inn & Suites, Amarillo, Texas

    Final Minutes
    this document in PDF PDF 117 KB (27 pages)

  • July 31, 2007
    Meeting with Pantex Plant Guards Union and Metal Trades Council of Amarillo, Amarillo, Texas

    Final Minutes
    this document in PDF PDF 82 KB (18 pages)

  • June 3, 2004
    Meeting with the Metal Trades Council

    Final Minutes
    this document in PDF PDF 52 KB (11 pages)

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Advisory Board Work Group on the Pantex Plant

This Work Group is responsible for reviewing the Pantex Plant site profile, the SEC petition from Pantex Plant petitioners, the NIOSH Evaluation Report of the petition, the SC&A Review of the Pantex Plant Site Profile, considering issues raised by the Board's contractor (SC&A) concerning the site profile and the petition Evaluation Report, and for assisting NIOSH and SC&A in the resolution of such issues. The Work Group may recommend to the Board, changes in the site profile as appropriate. The Work Group should strive to develop a recommendation to the Board on whether a class should be added to the SEC.

  • Work Group Members

    Bradley P. Clawson (Chair)
    Josie Beach
    John W. Poston, Sr.
    Phillip Schofield

  • Meeting Information

    • September 4, 2014
      Meeting of the Advisory Board's Work Group on Pantex Plant

      9:00 a.m. (Eastern Time)

      Cincinnati Airport Marriott
      2395 Progress Dr.
      Hebron, KY 41048
      859-586-0166

      This meeting is open to the public, but without a public comment period. Teleconference call access is available for this meeting and it is limited only by the number of ports available. To access the meeting via the teleconference call access, you must dial 1-866-659-0537. To be automatically connected to the meeting, you will need to enter the following participant code: 9933701.

      Agenda
      this document in PDF PDF 15 KB (2 pages)

      Discussion paper:

      SC&A Working Draft: Pantex Plant Site Profile Issues Matrix Draft Preliminary SC&A Assessment, Rev. 3
      Contract No. 200-2009-28555
      October 8, 2013
      this document in PDF PDF 507 KB (38 pages)

      Please note that as part of the procedures and processes of the Advisory Board's Work Groups, several kinds of pre-decisional documents may be developed. These documents, which can include white papers, matrices, working drafts, etc., are distributed among the Work Group members as research and background tools to facilitate discussion and deliberation. The discussions during the above meeting may cover a pre-decisional document. Because these types of documents are pre-decisional in nature, may contain sensitive information, and may change over time, they are not posted on our Web site. These finalized, reviewed and redacted pre-decisional documents are also available to other interested parties through an appropriate Freedom of Information Act request. Requests for documents not in the public domain should be submitted to the CDC/ATSDR Freedom of Information Act Office at foiarequests@cdc.gov.

    • June 18, 2013
      Meeting of the Advisory Board's Work Group on the Pantex Plant

      9:00 a.m. (Eastern time)

      Cincinnati Airport Marriott
      2395 Progress Dr.
      Hebron, KY 41048
      (859) 586-0166

      This meeting is open to the public, but without a public comment period. Teleconference call access is available for this meeting and it is limited only by the number of ports available. To access the meeting via the teleconference call access, you must dial 1-866-659-0537. To be automatically connected to the meeting, you will need to enter the following participant code: 9933701.

      Agenda
      this document in PDF PDF 9 KB (1 page)

      Transcript
      this document in PDF PDF 462 KB (166 pages)

      Discussion Paper:

      Please note that as part of the procedures and processes of the Advisory Board's Work Groups, several kinds of pre-decisional documents may be developed. These documents, which can include white papers, matrices, working drafts, etc., are distributed among the Work Group members as research and background tools to facilitate discussion and deliberation. The discussions during the above meeting may cover a pre-decisional document. Because these types of documents are pre-decisional in nature, may contain sensitive information, and may change over time, they are not posted on our Web site. These finalized, reviewed and redacted pre-decisional documents are also available to other interested parties through an appropriate Freedom of Information Act request. Requests for documents not in the public domain should be submitted to the CDC/ATSDR Freedom of Information Act Office at foiarequests@cdc.gov

    • August 10, 2011
      Meeting of the Advisory Board's Work Group on Pantex Plant

      Cincinnati Airport Marriott
      2395 Progress Dr.
      Hebron, KY 41048
      (859) 586-0166

      9:00 a.m. (Eastern time)

      This meeting is open to the public, but without a public comment period. Teleconference call access is available for this meeting and it is limited only by the number of ports available. To access the meeting via the teleconference call access, you must dial 1-866-659-0537. To be automatically connected to the meeting, you will need to enter the following participant code: 9933701.

      Agenda
      this document in PDF PDF 15 KB (1 page)

      Transcript
      this document in PDF PDF 748 KB (285 pages)

      Please note that as part of the procedures and processes of the Advisory Board's Work Groups, several kinds of pre-decisional documents may be developed. These documents, which can include white papers, matrices, working drafts, etc., are distributed among the Work Group members as research and background tools to facilitate discussion and deliberation. The discussions during the above meeting may cover a pre-decisional document. Because these types of documents are pre-decisional in nature, may contain sensitive information, and may change over time, they are not posted on our Web site. These finalized, reviewed and redacted pre-decisional documents are also available to other interested parties through an appropriate Freedom of Information Act request. Requests for documents not in the public domain should be submitted to the CDC/ATSDR Freedom of Information Act Office at foiarequests@cdc.gov.

    • May 3, 2011
      Meeting of the Advisory Board's Work Group on Pantex Plant

      Cincinnati Airport Marriott
      2395 Progress Dr.
      Hebron, KY 41048
      (859) 586-0166

      9:00 a.m. (Eastern time)

      This meeting is open to the public, but without a public comment period. Teleconference call access is available for this meeting and it is limited only by the number of ports available. To access the meeting via the teleconference call access, you must dial 1-866-659-0537. To be automatically connected to the meeting, you will need to enter the following participant code: 9933701.

      Agenda
      this document in PDF PDF 15 KB (1 page)

      Transcript
      this document in PDF PDF 537 KB (255 pages)

      Please note that as part of the procedures and processes of the Advisory Board's Work Groups, several kinds of pre-decisional documents may be developed. These documents, which can include white papers, matrices, working drafts, etc., are distributed among the Work Group members as research and background tools to facilitate discussion and deliberation. The discussions during the above meeting may cover a pre-decisional document. Because these types of documents are pre-decisional in nature, may contain sensitive information, and may change over time, they are not posted on our Web site. These finalized, reviewed and redacted pre-decisional documents are also available to other interested parties through an appropriate Freedom of Information Act request. Requests for documents not in the public domain should be submitted to the CDC/ATSDR Freedom of Information Act Office at foiarequests@cdc.gov.

    • January 19, 2011
      Teleconference Meeting of the Advisory Board's Work Group on Pantex Plant

      11:00 a.m. (Eastern time)

      This meeting is open to the public, but without a public comment period. Teleconference call access is available for this meeting and it is limited only by the number of ports available. To access the meeting via the teleconference call access, you must dial 1-866-659-0537. To be automatically connected to the meeting, you will need to enter the following participant code: 9933701.

      An agenda will be provided at a later date.

      Transcript
      this document in PDF PDF 257 KB (122 pages)

      Please note that as part of the procedures and processes of the Advisory Board's Work Groups, several kinds of pre-decisional documents may be developed. These documents, which can include white papers, matrices, working drafts, etc., are distributed among the Work Group members as research and background tools to facilitate discussion and deliberation. The discussions during the above meeting may cover a pre-decisional document. Because these types of documents are pre-decisional in nature, may contain sensitive information, and may change over time, they are not posted on our Web site. These finalized, reviewed and redacted pre-decisional documents are also available to other interested parties through an appropriate Freedom of Information Act request. Requests for documents not in the public domain should be submitted to the CDC/ATSDR Freedom of Information Act Office at foiarequests@cdc.gov.

    • May 4, 2010
      Meeting of the Advisory Board's Work Group on the Pantex Plant

      Cincinnati Airport Marriott
      2395 Progress Dr.
      Hebron, KY 41048
      (859) 586-0166

      9:30 a.m. (Eastern time)

      This meeting is open to the public, but without a public comment period. Teleconference call access is available for this meeting and it is limited only by the number of ports available. To access the meeting via the teleconference call access, you must dial 1-866-659-0537. To be automatically connected to the meeting, you will need to enter the following participant code: 9933701.

      Agenda
      this document in PDF PDF 16 KB (1 page)

      Transcript
      this document in PDF PDF 649 KB (312 pages)

      Please note that as part of the procedures and processes of the Advisory Board's Work Groups, several kinds of pre-decisional documents may be developed. These documents, which can include white papers, matrices, working drafts, etc., are distributed among the Work Group members as research and background tools to facilitate discussion and deliberation. The discussions during the above meeting may cover a pre-decisional document. Because these types of documents are pre-decisional in nature, may contain sensitive information, and may change over time, they are not posted on our Web site. These finalized, reviewed and redacted pre-decisional documents are also available to other interested parties through an appropriate Freedom of Information Act request. Requests for documents not in the public domain should be submitted to the CDC/ATSDR Freedom of Information Act Office at foiarequests@cdc.gov.

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Advisory Board and NIOSH Comments and Discussion Papers on Pantex Plant

The Pantex 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 has been cleared for distribution.

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Public Comments on Pantex Plant Documents

How to Submit Comments
Comments on Pantex Plant 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, 1090 Tusculum Avenue, Cincinnati, OH 45226. Please include the Site Profile/Docket Number (031) on all comments.

Comments Received

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Special Exposure Cohort Petition Information for the Pantex Plant


Open/Active SEC Petitions

There are currently no open/active SEC petitions from Pantex Plant.


Class(es) Added to the SEC

  • All employees of the Department of Energy, its predecessor agencies, and their contractors and subcontractors who worked at the Pantex Plant in Amarillo, Texas, during the period from January 1, 1958 through December 31, 1983, 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 SEC

    (Note: This class was established from Petition 68)


  • All employees of the Department of Energy, its predecessor agencies, and their contractors and subcontractors who worked at the Pantex Plant in Amarillo, Texas, from January 1, 1984, through December 31, 1991, 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 SEC

    (Note: This class was established from Petition 68)


Class(es) Not Added to the SEC

All employees of the Department of Energy, its predecessor agencies, and their contractors and subcontractors who worked at the Pantex Plant in Amarillo, Texas, from January 1, 1951, through December 31, 1957


(Note: This class was established from Petition 68)


SEC Petitions Not Qualifying for Evaluation

Not applicable at this time.


Petitions Qualified for Evaluation

To date, one petition from Pantex Plant has qualified for evaluation. The left-hand column of the table below shows the various steps in the SEC petitioning process. The right-hand column of the table contains information related to the Pantex Plant petition.

Petition 68
Date Received

September 8, 2006

Date Qualified for Evaluation

November 20, 2007

Summary of Information in Petition

Location: Amarillo, Texas

Job Titles and/or Job Duties: Production workers, technicians, including radiography, guards, physical plant, maintenance, administrative and support staff, contractors, and Atomic Energy Commission staff

Period of Employment: January 1, 1950 through December 31, 1991

Note: The information above is what qualified for evaluation. During our evaluation of whether dose reconstructions can adequately be completed for the above job titles and period of employment, information may cause NIOSH to change some the dates or job titles/duties. Therefore, as this petition proceeds through the SEC petitioning process and if an SEC class is proposed, the proposed class may not exactly match the above information.

Copy of the Petition Received

September 8, 2006
this document in PDF PDF 1.3 MB (33 pages)

Federal Register Notice Announcing that a Pantex Plant SEC Petition has met the Minimum Qualifications for Review and Evaluation

December 17, 2007
(January 1, 1950 through December 31, 1991)
this document in PDF PDF 84 KB (1 page)
SEC Petition Evaluation Report

August 8, 2008
(January 1, 1951 through December 31, 1991)
(August 8, 2008)
this document in PDF PDF 603 KB (67 pages)

Evaluation Report Sent to the Advisory Board

August 8, 2008

Petition Discussed by the Advisory Board

The Advisory Board discussed the petition on September 2-4, 2008, and August 25, 2011, during its regular meetings. The petition was discussed via teleconference on October 20, 2011.

Advisory Board Recommendation on SEC Petition

November 17, 2011
(January 1, 1958 through December 31, 1983)
this document in PDF PDF 97 KB (2 pages)

August 28, 2013
(January 1, 1951, through December 31, 1957)
this document in PDF PDF 34 KB (2 pages)

August 28, 2013
(January 1, 1984, through December 31, 1991)
this document in PDF PDF 33 KB (2 pages)

HHS Letters to Congress Regarding the SEC Petition

December 21, 2011
(January 1, 1958 through December 31, 1983)
this document in PDF PDF 94 KB (10 pages)

January 1, 1984, through December 31, 1991
(September 30, 2013)
this document in PDF PDF 74 KB (10 pages)

September 30, 2013
(January 1, 1951, through December 31, 1957)
this document in PDF PDF 69 KB (9 pages)

HHS Designation of Additional Members to the SEC

December 21, 2011
(January 1, 1958 through December 31, 1983)
this document in PDF PDF 42 KB (5 pages)

September 30, 2013
(January 1, 1984, through December 31, 1991)
this document in PDF PDF 39 KB (5 pages)

Note: A "designation" means that HHS is recommending a class be added to the SEC.

HHS Determination Concerning a Petition to Add Members to the SEC September 30, 2013
(January 1, 1951, through December 31, 1957)
this document in PDF PDF 34 KB (4 pages)

Note: A "determination" means that HHS is recommending a class not be added to the SEC.

Federal Register Notice: Designation of a Class of Employees for Addition to the Special Exposure Cohort

January 18, 2012
(January 1, 1958 through December 31, 1983)
this document in PDF PDF 92 KB (1 page)

October 29, 2013
(January 1, 1984, through December 31, 1991)
this document in PDF PDF 88 KB (1 page)

Note: A "designation" means that HHS is recommending a class be added to the SEC.

Federal Register Notice: Determination Concerning a Petition to Add a Class of Employees to the Special Exposure Cohort October 29, 2013
(January 1, 1951, through December 31, 1957)
this document in PDF PDF 72 KB (1 page)

Note: A "determination" means that HHS is recommending a class not be added to the SEC.

Effective Date for the SEC Class

January 20, 2012
(January 1, 1958 through December 31, 1983)


October 30, 2013
(January 1, 1984, through December 31, 1991)

Federal Register Notice: Final Effect of Designation of a Class of Employees for Addition to the Special Exposure Cohort

February 2, 2012
(January 1, 1958 through December 31, 1983)
this document in PDF PDF 51 KB (1 page)


November 27, 2013
(January 1, 1984, through December 31, 1991)
this document in PDF PDF 52 KB (1 page)

Note: A "designation" means that HHS is recommending a class be added to the SEC.


Letter to DOL Regarding the Addition of a New Class of Employees to the SEC

January 25, 2012
(January 1, 1958 through December 31, 1983)
this document in PDF PDF 20 KB (1 page)


November 4, 2013
(January 1, 1984, through December 31, 1991)
this document in PDF PDF 64 KB (1 page)


Back to Top of SEC Section

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Previous Versions of Pantex Plant Technical Documents

  • Advisory Board and NIOSH Comments and Discussions on Pantex Documents

    SC&A Draft: Review of Proposed NIOSH Dose Reconstruction Methods for Uranium and Thorium at Pantex Plant during 19511957 and 19841991, Rev. 1

    Contract No. 200-2009-28555, Rev. 1
    June 13, 2013
    this document in PDF PDF 717 KB (26 pages)

  • Site Profile: Introduction section

    • Revised July 27, 2006
      this document in PDF PDF 102 KB (10 pages)

      Revision Includes: Constitutes a total rewrite of document. Revised as a result of the biennial document review. Incorporates NIOSH formal review comments. This revision results in no change to the assigned dose.

      Approved February 18, 2004
      this document in PDF PDF 40 KB (7 pages)

  • Site Profile: Site Description section

    • Revised July 27, 2006
      this document in PDF PDF 465 KB (18 pages)

      Revision Includes: Constitutes a total rewrite of document. Revised as a result of the biennial document review. Incorporates NIOSH formal review comments. This revision results in no change to the assigned dose.

      Approved March 30, 2004
      this document in PDF PDF 404 KB (17 pages)

  • Site Profile: Occupational Medical Dose section

    • Revised February 1, 2007
      this document in PDF PDF 203 KB (20 pages)

      Revision Includes: Approved Revision 02 for organ dose assignment based on site specific information. Added Section 3-5, Skin Dose Method Description and Section 3-8, Attributions and Annotations. Incorporates internal formal and NIOSH formal review comments. Constitutes a total rewrite of document. This revision results in an increase in assigned dose and a PER is required.

    • Revised December 23, 2005
      this document in PDF PDF 176 KB (19 pages)

      Revision Includes: Document Publication Record contains no detailed description of revision details.

      Approved August 24, 2004
      this document in PDF PDF 153 KB (15 pages)

  • Site Profile: Occupational Environmental Dose section

    • Revised June 22, 2007
      this document in PDF PDF 1 MB (43 pages)

      Revision Includes: Incorporates Attributions and Annotations. Constitutes a total rewrite of the document. Incorporates formal internal review comments. No changes were needed as a result of formal NIOSH review. This revision results in no change to the assigned dose and no PER is required.

    • Approved August 24, 2004)
      this document in PDF PDF 894 KB (36 pages)

  • Site Profile: Occupational Internal Dose section

    • Revised June 22, 2007
      this document in PDF PDF 664 KB (72 pages)

      Revision Includes: Incorporates Attributions and Annotations and additional references. No sections were deleted. Minor editorial changes were made in Sections 5.2.1, 5.2.1.1, 5.2.1.1.4, 5.2.2.5, and 5.2.2.6.2. 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.

    • Page Change Revision February 8, 2007
      this document in PDF PDF 593 KB (55 pages)

      Page Change Revision Includes: Page change revision to change the date for the first DU-laden hydroshot from 1952 to 1959 on page 31. Updated the text in Section 5.2.2.6 on page 28 and updated Table 5-11 on page 32 and 5-19 on page 48. Added reference on page 49 for the telephone conversation that confirmed the actual date. Table 5-1 was moved from page 9 to page 10. Results in a decrease in the intake of DU and resultant dose for the years 1952 to 1959. Text was modified or added in Section 5 and References (pages 9-12, 28, 31-32, 48-49, and 53). No sections were deleted. Incorporates internal formal review comments and NIOSH formal review comments. This revision results in a reduction in assigned dose and no PER is required.

      Approved July 27, 2006
      this document in PDF PDF 588 KB (55 pages)

  • Site Profile: Occupational External Dose section
    (Approved July 27, 2006)
    this document in PDF PDF 745 KB (61 pages)

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Page last updated: August 20, 2014
Page last reviewed: August 10, 2013
Content Source: National Institute for Occupational Safety and Health (NIOSH) Division of Compensation Analysis and Support