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NIOSH Program Area:

Radiation Dose Reconstruction

 

Weldon Spring Plant
(Site Profile/Docket Number 053)

Location: Weldon Spring, Missouri

Also known as: Mallinckrodt
                         Weldon Spring Chemical Co.
                         Weldon Spring Site Remedial Action Project (WSSRAP)
                         WSS

Site Profile

  1. Introduction
    (Revised May 24, 2013)
    this document in PDF PDF 99 KB (9 pages)

    Revision Includes: Revision implemented according to guidance from ORAUT-PROC-0031, Rev. 04. Section 1.1: Replaced introductory text with updated template language. Added Section 1.1.1, “Purpose,” and changed heading from “Site Profile Description” to “Scope” for Section 1.1.2. Minor technical editing conducted for Section 1.2. Deleted repetitious details and results that appear in subsequent sections of the Site Profile from Sections 1.3 through 1.6. Updated the Acronyms and Abbreviations and the References sections. 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.

  2. Site Description
    (Revised May 21, 2013)
    this document in PDF PDF 693 KB (44 pages)

    Revision Includes: Incorporates data that has been found since the initial draft was issued. Updates description of processed materials and throughputs. No 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 January 30, 2013)
    this document in PDF PDF 152 KB (12 pages)

    Revision Includes: Incorporates historical documents captured since the first revision, to include skin doses for all areas of skin, and to address SC&A comments. Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of the document.

  4. Occupational Environmental Dose
    (Revised May 17, 2013)
    this document in PDF PDF 707 KB (35 pages)

    Revision Includes: Revises the TBD as a result of completion of Advisory Board Work Group issues. Includes information in Section 4.2.2.1 about the drying of the raffinate pits and its potential for resuspension of pit radionuclide content. Includes factors for calculation of recycled uranium contaminant activity based on ppb or pCi uranium. Revises and implements according to ORAUT-PROC-0031, Rev. 02. Adds a table for maximum sitewide median intake values to comply with PROC-0031, and also adds a table of annual median intake values for the WSCP, WSRP, and WSQ. Replaces introductory text with updated template language in Section 4.1. Revised Section 4.1.1, Purpose, and Section 4.1.2, Scope. Revises Sections 4.2.1 and 4.2.2 to more specifically target the radionuclides of concern and source terms that contribute to 95% of the potential internal dose. Revises the approach to determination of annual intake of radionuclides (Section 4.2.3.1) during the operational period to optimize the use of available site-specific monitoring data. Adds a table of annual median values for occupational external dose to be used as surrogates for onsite ambient dose during the operational period. Adds Section 4.4 as a summary of environmental doses for use by dose reconstructors and provides tabulated inhalation intakes and ambient dose default values. Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of the document.


  5. Occupational Internal Dose
    (Revised May 21, 2013)
    this document in PDF PDF 642 KB (60 pages)

    Revision Includes: Modifies the indoor radon equilibrium factor from 0.5 to 0.7 to coincide with Advisory Board meeting transcripts from September 19, 2012. This increases the radon intake value from 8.8 WLM/year to 12.4 WLM/year. Changes were made in Section 5.6.1.3 and Table 5-23. No changes occurred as a result of formal internal and NIOSH review.

  6. Occupational External Dose
    (Revised February 6, 2013)
    this document in PDF PDF 3 MB (45 pages)

    Revision Includes: Removes all surrogate data except the data from MCW. Adds new material located since the last revision. Includes a correction factor to account for worker-radiation source geometry to be applied to the measured and missed photon dose for operators, material handlers and trade workers to avoid an underestimate of dose. Organs most affected by this are those in the lower torso (stomach, pancreas, ovaries, etc.). DCAS-TIB-0013 was included as a reference and used to determine this geometric correction factor of 2.1. Incorporates responses and commitments based on SC&A and Advisory Board Working Group issues. Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of the document.

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Technical Information Bulletins (TIBs)

At the current time, there are no TIBs for Weldon Spring 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.

At the current time, no PERs or PEPs specific to Weldon Spring Plant have been developed. However, we have developed PERs and PEPs that pertain to multiple sites. To view all PERs and PEPs that have been developed, please refer to the Program Evaluation Reports (PERs) and Program Evaluation Plans (PEPs) page.

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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 Weldon Spring Plant:

  • September 2, 2009
    Meeting with Laborers Local 660, St. Charles, Missouri

    Final Minutes
    this document in PDF PDF 42 KB (6 pages)

  • February 2, 2005
    Meeting with St. Louis Building and Construction Trades Council, AFL-CIO

    Final Minutes
    this document in PDF PDF 29 KB (4 pages)

  • February 2, 2005
    Meeting with United Nuclear Weapons Workers (UNWW)

    Final Minutes
    this document in PDF PDF 36 KB (6 pages)

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Advisory Board Work Group on Weldon Spring Plant

This Work Group is responsible for reviewing the Weldon Spring Site Profile, SEC petitions from Weldon Spring petitioners, the NIOSH Evaluation Report of the petition, and the SC&A Review of the Weldon Spring Site Profile. It is also responsible for considering issues raised by the Board's contractor (SC&A) concerning the Site Profile and SEC petitions, 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 recommendations to the Board on whether a class should be added to the SEC.

  • Work Group Members

    Richard A. Lemen, Ph.D., M.S.P.H. (Chair)
    R. William Field, Ph.D., M.S.
    James Malcolm Melius, M.D., Dr. P.H.

  • Meeting Information

    • September 10, 2012
      Teleconference Meeting of the Advisory Board's Work Group on Weldon Spring Plant

      1:00 p.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 103 KB (1 page)

      Transcript
      this document in PDF PDF 264 KB (61 pages)

      Discussion Papers:

      NIOSH White Paper: Weldon Spring Thorium Processing Investigations, Rev. 0
      (August 27, 2012)
      this document in PDF PDF 771 KB (8 pages)

      SC&A Memo: Potential Drying of Weldon Spring Pits
      (July 9, 2012)
      this document in PDF PDF 960 KB (8 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 7, 2012
      Teleconference Meeting of the Advisory Board's Work Group on Weldon Spring Plant

      1:30 p.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 62 KB (1 page)

      Transcript
      this document in PDF PDF 311 KB (72 pages)

      Discussion Paper:

      NIOSH/DCAS: Weldon Spring Plant Special Exposure Cohort Petition Evaluation Report Presentation
      (Full Color Version)

      June 2012
      this document in PDF PDF 289 KB (8 pages)

      NIOSH/DCAS: Weldon Spring Plant Special Exposure Cohort Petition Evaluation Report Presentation
      (Black & White Version)

      June 2012
      this document in PDF PDF 93 KB (8 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.

    • February 14, 2012
      Teleconference Meeting of the Advisory Board's Work Group on Weldon Spring Plant

      10:00 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 20 KB (1 page)

      Transcript
      this document in PDF PDF 364 KB (84 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.

    • November 29, 2011
      Teleconference Meeting of the Advisory Board's Work Group on Weldon Spring Plant

      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 327 KB (125 pages)

      Discussion Papers:

      SC&A Draft: Issues Matrix for the Weldon Spring Site Special Exposure Cohort Petition and NIOSH Evaluation Report, and SC&A's Review of the Weldon Spring Site Profile
      November 9, 2011
      this document in PDF PDF 220 KB (29 pages)

      SC&A Draft: SC&A's Evaluation of NIOSH's Response of September 7, 2011, to Daily Weighted Exposure Blunders in Weldon Spring Data
      September 27, 2011
      this document in PDF PDF 29 KB (4 pages)

      SC&A Draft: SC&A's Initial Test of External and Bioassay Data Completeness for the Weldon Spring Site
      August 15, 2011
      this document in PDF PDF 55 KB (9 pages)

      SC&A Draft: SC&A's Evaluation of NIOSH's Weldon Spring Response of April 21, 2011, and the Work Group Meeting of May 9, 2011
      August 3, 2011
      this document in PDF PDF 75 KB (12 pages)

      SC&A Draft: SC&A's Evaluation of NIOSH's July 1, 2011, Response Concerning Recycled Uranium (SEC Issue #5) at Weldon Spring
      August 3, 2011
      this document in PDF PDF 47 KB (9 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.

    • September 13, 2011
      Meeting of the Advisory Board's Work Group on Weldon Spring 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 16 KB (1 page)

      Transcript
      this document in PDF PDF 847 KB (147 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 9, 2011
      Meeting of the Advisory Board's Work Group on Weldon Spring 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 11 KB (1 page)

      Transcript
      this document in PDF PDF 623 KB (239 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.

    • March 23, 2011--POSTPONED
      Note: This meeting was postponed and will be rescheduled at a later date.

      Meeting of the Advisory Board's Work Group on Weldon Spring 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.

      An agenda will be provided at a later date.

      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 25, 2011
      Meeting of the Advisory Board's Work Group on Weldon Spring 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 38 KB (1 page)

      Transcript
      this document in PDF PDF 720 KB (279 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.

    • October 19, 2010
      Meeting of the Advisory Board's Work Group on Weldon Spring 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 24 KB (1 page)

      Transcript
      this document in PDF PDF 570 KB (218 page)

      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 Weldon Spring Plant

The Weldon Spring 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 Weldon Spring Plant Documents

How to Submit Comments
Comments on Weldon Spring 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 (053) on all comments.

Comments Received
  • No public comments have been received at this time.

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Special Exposure Cohort Petition Information for Weldon Spring Plant

  • Class(es) Added to the SEC

    Not applicable at this time.


  • Class(es) Not Added to the SEC

    All employees of the Department of Energy, Department of Energy contractors, or subcontractors who worked in any area at the Weldon Spring Plant in Weldon Spring, Missouri, during the applicable covered operational period from January 1, 1957, through December 31, 1967

    (Note: This class was established by Petition 143.)


  • Petition(s) Qualified for Evaluation

    Location: Weldon Spring, Missouri

    Job Titles and/or Job Duties: All employees of DOE, DOE contractors, or subcontractors who worked in any area

    Period of Employment: January 1, 1957 through December 31, 1966


  • Federal Register Notice Announcing that a Weldon Spring Plant SEC Petition has met the Minimum Qualifications for Review and Evaluation
    September 22, 2009
    this document in PDF PDF 61 KB (1 page)


  • Copies of the Petitions Received
    Copy of a Weldon Spring Plant SEC petition received (January 1, 1957 through December 31, 1966)
    (April 29, 2009)
    this document in PDF PDF 5 MB (68 pages)

    Copy of a Weldon Spring Plant SEC petition received (January 1, 1955 through December 31, 1967)
    (April 29, 2009)
    this document in PDF PDF 4 MB (72 pages)

    NOTE: The two petitions listed above have been merged into one petition.


  • SEC Petition Evaluation Report
    April 21, 2010
    this document in PDF PDF 679 KB (92 pages)


  • Petition Discussed by the Advisory Board
    The Advisory Board discussed the petition on May 20, 2010, May 25, 2011, February 29, 2012, June 19, 2012, and September 19, 2012, during its regular meetings.

    Note: the agenda and transcripts from these meetings are available on the Advisory Board and Public Meetings page.


  • Advisory Board Recommendation on the SEC Petition
    October 31, 2012
    this document in PDF PDF 173 KB (1 page)


  • HHS Letters to Congress Regarding the SEC Petition
    December 7, 2012
    this document in PDF PDF 289 KB (9 pages)


  • HHS Determination Concerning a Petition to Add members to the Special Exposure Cohort
    December 7, 2012
    this document in PDF PDF 289 KB (9 pages)


  • Federal Register Notice: Determination Concerning a Petition to Add Members to the Special Exposure Cohort
    December 28, 2012
    this document in PDF PDF 76 KB (1 page)


  • Effective Date for the SEC Class
    Not applicable.
    (Note: this only applies if the class is added to the SEC.)


  • Federal Register Notice: Final Effect of Designation of a Class of Employees for Addition to the Special Exposure Cohort
    Not applicable.
    (Note: this only applies if the class is added to the SEC.)


  • Letter to DOL Regarding the Addition of a New Class of Employees to the SEC
    Not applicable.
    (Note: this only applies if the class is added to the SEC.)

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Previous Versions of Weldon Spring Plant Documents

 

Site Profile

  • Section 1: Introduction section

    • Page Change Revision June 30, 2008
      this document in PDF PDF 176 KB (11 pages)

      Revision Includes: Approves page change revision initiated to eliminate reference to a user's guide on page 10 in Section 1.2, which was never published due to a change in policy. Addsan Attributions and Annotations Section on page 10, updated NIOSH required language on page 5 in Section 1.1, and ORAU team references on pages 8 and 11. Now uses term, "favorable to claimant" on pages 6, 9, and 10 in Sections 1.1 and 1.2. No sections were deleted. Incorporates formal internal review comments. No changes were needed as a result of NIOSH formal review.

    • Approved June 28, 2005
      this document in PDF PDF 122 KB (11 pages)


  • Section 2: Site Description section

  • Section 3: Occupational Medical Dose section

  • Section 4: Occupational Environmental Dose

  • Section 5: Occupational Internal Dose

    • Revised March 15, 2013
      this document in PDF PDF 659 KB (60 pages)

      Revision Includes: Incorporates numerous minor corrections and edits. SRDB numbers and page numbers were added. In Section 5.2.1, the specific activity for slightly enriched (1%) uranium was adjusted to agree with the formula in DOE 2001a. Sections 5.2.2 related to uranium decay products were edited to reflect the fact that the early uranium mills may not have been effective in removing thorium and to increase the amount of Th-230 and daughters to assume in calculations. The maximum concentrations for certain decay products at the WSRP and WSQ were eliminated. A discussion was added in Section 5.2.3 on potential intakes from thoron. Site-specific ratios of Th-230 to other contaminants were developed in Section 5.6.1.1 for use during initial uranium processing. DWA concentrations for thorium dust measurements were added as Attachment A, and these values were used to create a new table of thorium intakes in Section 5.6.1.2. Thoron guidance was also added to this section. A statement was added in Section 5.6.1.1 to use Friday urine sampling data statistics to avoid underestimating intakes. The estimated annual exposure from radon was increased in Section 5.6.1.3, and Section 5.2.4 on recycled uranium was updated in response to issues raised in the Advisory Board Work Group. Thorium-232 intake rates updated to reflect an 8-hour workday normalized to a calendar for each of the years for Th-232 operations, and equations were included in the text regarding calculation of the median and 95th percentiles of the Th-232 intake rates. Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of the document.


    • Approved June 28, 2005
      this document in PDF PDF 506 KB (43 pages)



  • Section 6: Occupational External Dose section

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Page last updated: June 19, 2013
Page last reviewed: August 25, 2014
Content Source: National Institute for Occupational Safety and Health (NIOSH) Division of Compensation Analysis and Support