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NIOSH Program Area:

Radiation Dose Reconstruction

 

Los Alamos National Laboratory (LANL)
(Site Profile/Docket Number 027)

Location: Los Alamos, New Mexico

Also Known As: Los Alamos Scientific Laboratory

Site Profile

  1. Introduction
    (Revised October 1, 2007)
    this document in PDF PDF 170 KB (10 pages)

    Revision Includes: Initiated to include References and Attributions and Annotations sections. Minor editorial changes made. No further changes occurred as a result of formal internal review. Incorporates formal NIOSH review comments.

  2. Site Description
    (Approved May 7, 2004)
    this document in PDF PDF 565 KB (65 pages)

  3. Occupational Medical Dose
    (Revised September 14, 2010)
    this document in PDF PDF 219 KB (18 pages)

    Revision Includes: Incorporates data captured since the last revision to better document what has come to be known about PFG at LANL, and to add skin doses for all projections and periods. Added references and included Attributions and Annotations Section. Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of the document.

  4. Occupational Environmental Dose
    (Revised March 26, 2010)
    this document in PDF PDF 1.6 MB (96 pages)

    Revision Includes: Adds new environmental external and uptake data prior to 1971. Added Attributions and Annotations section. Incorporated SEC-00061 and SEC-00051. Intakes to assign maximum doses for four primary radionuclides during the specified employment period for the class of Los Alamos National Laboratory employees added to the Special Exposure Cohort (1943-1975) are included. Section 4.1.3.3 clarified 'partial' dose reconstruction with respect to ambient external dose; additional instructions to dose reconstructors were added to section 4.3.1, 'Ambient Radiation.' These state that on-site ambient dose is to be based on the environmental film badge and TLD results available from 1965 onward. In support of this, rows with years prior to 1965 were deleted from Table 4-26. Single correction to a preposition in Section 4.2.1. Incorporates review comments from formal internal and NIOSH review. Incorporates changes required by the adoption of an 83.14 SEC determination. This alters the definition of the class of Los Alamos National Laboratory employees added to the SEC (1943-1975), and removes the area-specific and monitoring restrictions from the class definition making the SEC class now include all employees in all areas of the LANL during the period 1943-1975. Constitutes a total rewrite of the document.

  5. Occupational Internal Dose
    (Revised April 18, 2013)
    this document in PDF PDF 940 KB (117 pages)

    Revision Includes: Incorporates SEC-00109. Removed provisions to estimate unmonitored intakes consistent with the wording in the Advisory Board recommendation (Melius 2012). Incorporates formal internal and NIOSH review comments. Constitutes a total rewrite of the document.

  6. Occupational External Dose
    (Revised March 21, 2013)
    this document in PDF PDF 1 MB (79 pages)

    Revision Includes: Incorporates dose reconstruction limitations that relate to a class of LANL employees added to the SEC comprised of all workers from January 1, 1976, to December 31, 1995, SEC-00109 (NIOSH 2012). Attachment B has been added, which contains an analysis that evaluates the neutron-to-photon ratios promulgated in earlier revisions of the TBD. No changes were made to the neutron-to-photon ratios as a result. Incorporates formal internal and NIOSH review comments. For the years 1976-1980, NIOSH has agreed, in addressing comments on the TBD, to assign neutron dose using the 95th-percentile value of the NP ratio to address uncertainties associated with the transition from film to TLD dosimeters in response to the LANL ABRWH Work Group. Constitutes a total rewrite of the document.

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Technical Information Bulletins (TIBs)

  • Internal Dosimetry Coworker Data for Los Alamos National Laboratory
    this document in PDF PDF 942 KB (104 pages)

    Document Number: ORAUT-OTIB-0062 Rev-00

    About this Document: New technical information bulletin for internal dosimetry coworker data for Los Alamos National Laboratory. Incorporates formal internal and NIOSH review comments. Analysis of plutonium-239 and cesium-137 lung counts updated and new guidance added for Type Super S plutonium-239.

    Approved: October 15, 2009


  • Los Alamos National Laboratory Bioassay Repository Database
    this document in PDF PDF 414 KB (37 pages)

    Document Number: ORAUT-OTIB-0063 Rev-00

    About this Document: Approved new technical information bulletin for Los Alamos National Laboratory Bioassay Data Project. Incorporates formal internal and NIOSH review comments.

    Approved: August 24, 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.

Program Evaluation Report: Los Alamos National Laboratory TBD Revision
this document in PDF PDF 18 KB (2 pages)

Document Number: OCAS-PER-0018 Rev-00

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

Approved: July 31, 2007

Summary: It is not possible to precisely determine the effect of the change to LAMPF dose estimates on Probability of Causation without a new Dose Estimate. However, it is possible to determine if the LAMPF energy distribution was used in the original dose estimate. It is also possible to determine if an individual was assigned unmonitored neutron dose based on neutron to photon ratios and whether the ratio used will increase or decrease under the new revision to the TBD.

In order to determine the effect of these factors, the individual cases must be re-examined. Since the unmonitored neutron dose has the potential of affecting every claim, all claims completed prior to May 30, 2007 from Los Alamos National Laboratory with a Probability of Causation less than 50% will require a review. NIOSH will request claims be returned in which the LAMPF energy distributions were originally assigned using Revision 0 for a new dose estimate. NIOSH will also request the return of claims in which the original dose estimate utilized a neutron to photon ratio that has now increased. For all other claims, NIOSH will review the claim against any other revisions to other technical documents that may affect the claim. DOL will be provided with a statement for each claim indicating what changes the claim was reviewed against and why the change did not affect the particular dose estimate or the Probability of Causation calculation. For any claims where it is not possible to provide this statement without a new Dose Estimate, NIOSH will request that DOL return the claim for a new Dose Estimate.

NIOSH has determined that 300 claims meet the criteria for further review. The remaining cases with a probability of causation less than 50% (1 claim) were completed using revision 1 of the TBD. NIOSH will provide DOL with the list of 300 claims as well as a determination on each claim as to whether a new Dose Estimate is required.

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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 LANL:

  • May 10, 2007
    Meeting with International Association of Firefighters (IAFF) Local 3279, Los Alamos County Fire Department, White Rock, New Mexico

    Final Minutes
    this document in PDF PDF 172 KB (16 pages)

  • May 9, 2007
    Meeting with International Association of Firefighters (IAFF) Local 3279, Los Alamos County Fire Department, White Rock, New Mexico

    Final Minutes
    this document in PDF PDF 108 KB (9 pages)

  • May 9, 2007
    Meeting with Executive Board of International Association of Firefighters (IAFF) Local 3279, Los Alamos County Fire Department, White Rock, New Mexico

    Final Minutes
    this document in PDF PDF 79 KB (6 pages)

  • September 17, 2008 (4:00 p.m.)
    Meeting with New Mexico Building and Construction Trades Council (BCTC), Española, New Mexico

    Final Minutes
    this document in PDF PDF 60 KB (11 pages)

  • September 17, 2008 (9:00 a.m.)
    Meeting with International Association of Firefighters (IAFF) Local 3279, White Rock, New Mexico

    Final Minutes
    this document in PDF PDF 70 KB (14 pages)

  • September 16, 2008 (6:30 p.m.)
    Meeting with International Guards Union of America (IGUA) Local 69, Los Alamos, New Mexico

    Final Minutes
    this document in PDF PDF 37 KB (6 pages)

  • September 16, 2008 (4:30 p.m.)
    Meeting with International Guards Union of America (IGUA) Local 69, Los Alamos, New Mexico

    Final Minutes
    this document in PDF PDF 60 KB (11 pages)

  • September 16, 2008 (1:00 p.m.)
    Meeting with International Guards Union of America (IGUA) Local 69, Los Alamos, New Mexico

    Final Minutes
    this document in PDF PDF 52 KB (9 pages)

  • September 16, 2008 (9:00 a.m.)
    Meeting with International Guards Union of America (IGUA) Local 69, Los Alamos, New Mexico

    Final Minutes
    this document in PDF PDF 58 KB (11 pages)

  • August 16, 2005
    Meeting with International Guards Union of America Local 69, Los Alamos, New Mexico

    Final Minutes
    this document in PDF PDF 67 KB (16 pages)

  • June 20, 2005
    Meeting with New Mexico Building and Construction Trades Council, Albuquerque, New Mexico

    Final Minutes
    this document in PDF PDF 61 KB (5 pages)

  • June 18, 2005
    Meeting with University Professional and Technical Employees Local 1663 at Northern New Mexico Community College, Espanola, New Mexico

    Final Minutes
    this document in PDF PDF 126 KB (30 pages)

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Advisory Board Work Group on LANL

This Work Group is responsible for reviewing the Los Alamos site profile (as revised), the SEC petition(s) from Los Alamos petitioners, the NIOSH Evaluation Report of the petition, the SC&A Review of the Los Alamos Site Profile. It is also responsible for 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

    Mark Griffon (Chair)
    Josie Beach
    James E. Lockey, M.D., M.S.
    Wanda I. Munn


  • Meeting Information

    • September 11, 2012--MEETING TIME CHANGED
      Teleconference Meeting of the Advisory Board's Work Group on Los Alamos National Laboratory (LANL)

      2:00 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 105 KB (1 page)

      Transcript
      this document in PDF PDF 353 KB (45 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

    • May 14, 2012
      Meeting of the Advisory Board's Work Group on Los Alamos National Laboratory (LANL)

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

      9:00 a.m. (Eastern time)

      Agenda
      this document in PDF PDF 96 KB (1 page)

      Transcript
      this document in PDF PDF 1.7 MB (307 pages)

      Discussion Papers:

      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.

    • May 2, 2011
      Meeting of the Advisory Board's Work Group on Los Alamos National Laboratory (LANL)

      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 18 KB (1 page)

      Transcript
      this document in PDF PDF 865 KB (332 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 11, 2011--CANCELED
      Meeting of the Advisory Board's Work Group on Los Alamos National Laboratory (LANL)

      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.

    • November 3, 2010
      Meeting of the Advisory Board's Work Group on Los Alamos National Laboratory (LANL)

      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 9 KB (1 page)

      Transcript
      this document in PDF PDF 933 KB (361 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.

    • April 29, 2010
      Meeting of the Advisory Board's Work Group on LANL

      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.

      An agenda will be provided at a later date.

      Transcript
      this document in PDF PDF 701 KB (273 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 LANL

The documents listed under this section were prepared by the Advisory Board on Radiation and Worker Health (or their technical support contractor) or NIOSH. Some of the items listed below are working documents and were developed for discussion purposes only. The documents represent preliminary positions taken on technical issues. Draft, preliminary, interim, and white paper documents are not final positions unless specifically marked as such.

The documents below 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.

The most recent documents appear at the top of the list.

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Public Comments on LANL Documents

How to Submit Public Comments

Members of the public can provide comments on LANL documents. Comments should 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 (027) on all comments.

Comments Received:

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Special Exposure Cohort Petition Information for LANL


Open/Active SEC Petitions

Currently there are no open/active SEC petition(s) from Los Alamos National Laboratory (LANL).


Classes Added to the SEC

  • Employees of the Department of Energy (DOE), its predecessor agencies, or DOE contractors or subcontractors who were monitored or should have been monitored for radiological exposures while working in operational Technical Areas with a history of radioactive material use at the Los Alamos National Laboratory (LANL) for a number of work days aggregating at least 250 work days from March 15, 1943 through December 31, 1975, or in combination with work days within the parameters established for one or more other classes of employees in the Special Exposure Cohort.

    (Note: This class was established from Petition 51)


  • Employees of the DOE predecessor agencies and their contractors or subcontractors who were monitored or should have been monitored for exposure to ionizing radiation associated with radioactive lanthanum (RaLa) operations at Technical Area 10 (Bayo Canyon Site), Technical Area 35 (Ten Site), and Buildings H, Sigma, and U (located within Technical Area 1) for a number of work days aggregating at least 250 work days during the period from September 1, 1944, through July 18, 1963, or in combination with work days within the parameters established for one or more classes of employees in the SEC.

    (Note: This class was established from Petition 61)


  • All employees of the Department of Energy, its predecessor agencies, and their contractors and subcontractors who worked at the Los Alamos National Laboratory (LANL) in Los Alamos, New Mexico from January 1, 1976, through December 31, 1995, 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

    (Note: This class was established from Petition 109)


  • All employees of the Department of Energy, its predecessor agencies, and their contractors and subcontractors who worked at the Los Alamos National Laboratory in Los Alamos, New Mexico from March 15, 1943 through December 31, 1975, 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.

    (Note: This class was established from Petition 170)


Classes Not Added to the SEC

Not applicable at this time.


SEC Petitions Not Qualifying for Evaluation

There were two additional petitions received that did not qualify for evaluation. One petition was withdrawn by the petitioner and the other petition did not meet the minimum petition requirements for evaluation.


Petitions Qualified for Evaluation

To date, four petitions from LANL have qualified for evaluation. Below you will find a table for each petition. The left-hand column of the tables below shows the various steps in the SEC petitioning process. The right-hand column of the tables contain information related to the specific LANL petition.

Below is a list of the petitions that qualified for evaluation. Select a petition on the list to view to the table for that particular petition.

  • Petition 51 (1943 - 1975 timeframe qualified for evaluation)

  • Petition 61 (September 1, 1944 through July 18, 1963 timeframe qualified for evaluation)

  • Petition 109 (January 1, 1976 through December 31, 2005 timeframe qualified for evaluation)

  • Petition 170 (March 15, 1943 through December 31, 1975 timeframe qualified for evaluation)

Petition 51
Date Received

January 23, 2006

Date Qualified for Evaluation

August 2, 2006

Summary of Information in Petition

Job Titles and/or Job Duties: All Department of Energy employees, contractors, and subcontractors employed in all Tech areas

Period of Employment: 1943 - 1975

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

LANL Petition:

Pages 1-48
this document in PDF PDF 2.0 MB (48 page)

Pages 49-97
this document in PDF PDF 1.9 MB (49 page)

Pages 98-146
this document in PDF PDF 3.3 MB (49 page)

Pages 147-192
this document in PDF PDF 1.6 MB (46 page)

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

August 17, 2006
this document in PDF PDF 74 KB (1 page)

SEC Petition Evaluation Report

February 6, 2007
this document in PDF PDF 514 KB (117 pages)
Evaluation Report Sent to the Advisory Board

February 6, 2007

Petition Discussed by the Advisory Board

The Advisory Board discussed the petition on September 21, 2006, during its regular meeting.

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

Advisory Board Recommendation on SEC Petition

May 23, 2007
this document in PDF PDF 543 KB (2 pages)

HHS Letters to Congress Regarding the SEC Petition

June 22, 2007
this document in PDF PDF 732 KB (6 pages)

HHS Designation of Additional Members to the SEC

June 22, 2007
this document in PDF PDF 499 KB (4 pages)

Note: this only applies if the class is added to the SEC.

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

July 30, 2007
this document in PDF PDF 79 KB (1 page)

Note: A "designation" will be published if there is a recommendation to add a class to the SEC.

Effective Date for the SEC Class

July 22, 2007

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

August 7, 2007
this document in PDF PDF 78 KB (1 page)

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

July 30, 2007
this document in PDF PDF 25 KB (1 page)

Correcting the omission of TA-33 from the list of Technical Areas with a history of radioactive material use)
(September 10, 2007)
this document in PDF PDF 54 KB (1 page)

Note: this only applies if the class is added to the SEC.

Back to Top of SEC Section

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Petition 61
Date Received

June 5, 2006

Date Qualified for Evaluation

June 7, 2006

Summary of Information in Petition

Job Titles and/or Job Duties: All workers potentially exposed to radioactive lanthanum at the Technical Area 10 Bayo Canyon facility, TA-35 (Ten Site), or TA-1, buildings Sigma, H, and U

Period of Employment: September 1, 1944 through July 18, 1963

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

LANL Petition
(June 5, 2006)
this document in PDF PDF 88 KB (2 pages)

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

June 26, 2006
this document in PDF PDF 84 KB (1 page)

SEC Petition Evaluation Report

August 18, 2006
this document in PDF PDF 57 KB (17 pages)

Evaluation Report Sent to the Advisory Board

August 18, 2006

Petition Discussed by the Advisory Board

The Advisory Board discussed the petition on February 17, 2009, during its regular meeting.

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

Advisory Board Recommendation on SEC Petition

October 11, 2006
this document in PDF PDF 517 KB (2 pages)

HHS Letters to Congress Regarding the SEC Petition

November 9, 2006
this document in PDF PDF 506 KB (6 pages)

HHS Designation of Additional Members to the SEC

November 9, 2006
this document in PDF PDF 183 KB (4 pages)

Note: this only applies if the class is added to the SEC.

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

December 8, 2006
this document in PDF PDF 103 KB (2 pages)

Note: A "designation" will be published if there is a recommendation to add a class to the SEC.

Effective Date for the SEC Class

December 9, 2006

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

December 27, 2006
this document in PDF PDF 146 KB (2 pages)

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

December 12, 2006
this document in PDF PDF 79 KB (1 page)

Note: this only applies if the class is added to the SEC.

Back to Top of SEC Section

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Petition 109
Date Received

April 3, 2008

Date Qualified for Evaluation

May 29, 2008

Summary of Information in Petition

Location: Los Alamos, New Mexico

Job Titles and/or Job Duties: All service support workers (which includes, but is not limited to, security guards, firefighters, laborers, custodians, carpenters, plumbers, electricians, pipefitters, sheet metal workers, ironworkers, welders, maintenance workers, truck drivers, delivery persons, radiation technicians, and area work coordinators) who worked in any operational Technical Areas with a history of radioactive material use.

Period of Employment: January 1, 1976 through December 31, 2005

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

LANL Petition
this document in PDF PDF 2.7 MB (111 pages)

Note: Due to their extensive number and size, some supplementary documents provided with the petition above are not posted on our Web site. These documents are available upon request.



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

June 17, 2008
this document in PDF PDF 45 KB (1 page)

SEC Petition Evaluation Report

Revised August 15, 2012
this document in PDF PDF 758 KB (98 pages)

Evaluation Report Sent to the Advisory Board

January 22, 2009 (Rev. 0)

August 22, 2012 (Rev. 1)

Petition Discussed by the Advisory Board

The Advisory Board discussed the petition on November 16, 2010, May 3, 2007, June 19, 2012, and September 18, 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 SEC Petition

October 31, 2012
this document in PDF PDF 192 KB (2 pages)

HHS Letters to Congress Regarding the SEC Petition

December 7, 2012
this document in PDF PDF 279 KB (10 pages)

HHS Designation of Additional Members to the SEC

December 7, 2012
this document in PDF PDF 138 KB (5 pages)

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

December 28, 2012
this document in PDF PDF 81 KB (1 page)

Note: A "designation" will be published if there is a recommendation to add a class to the SEC. A "determination" will be published if there is a recommendation not to add a class to the SEC.

Effective Date for the SEC Class

January 6, 2013

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

January 17, 2013
this document in PDF PDF 79 KB (1 page)

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

January 7, 2013
this document in PDF PDF 92 KB (1 page)

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Petition 170
Date Received

April 23, 2010

Date Qualified for Evaluation

April 27, 2010

Summary of Information in Petition

Job Titles and/or Job Duties: All employees of the Department of Energy, its predecessor agencies, and their contractors and subcontractors

Period of Employment: March 15, 1943 through December 31, 1975

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

LANL Petition
this document in PDF PDF 157 KB (2 pages)

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

May 6, 2010
this document in PDF PDF 101 KB (2 pages)

SEC Petition Evaluation Report

April 28, 2010
this document in PDF PDF 125 KB (20 pages)

Evaluation Report Sent to the Advisory Board

April 29, 2010

Petition Discussed by the Advisory Board

The Advisory Board discussed the petition on May 20, 2010, and July 14, 2010, during its regular meeting.

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

Advisory Board Recommendation on SEC Petition

June 11, 2010
this document in PDF PDF 48 KB (2 pages)

HHS Letters to Congress Regarding the SEC Petition

July 13, 2010
this document in PDF PDF 81 KB (10 pages)

HHS Designation of Additional Members to the SEC

July 13, 2010
this document in PDF PDF 42 KB (5 pages)

Note: this only applies if the class is added to the SEC.

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

July 30, 2010
this document in PDF PDF 68 KB (1 page)

Note: A "designation" will be published if there is a recommendation to add a class to the SEC.

Effective Date for the SEC Class

August 12, 2010

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

August 23, 2010
this document in PDF PDF 69 KB (1 page)

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

August 24, 2010
this document in PDF PDF 29 KB (2 pages)

Note: this only applies if the class is added to the SEC.

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Previous Versions of LANL Documents

  • Site Profile: Introduction
    (Approved January 25, 2005)
    this document in PDF PDF 53 KB (8 pages)

  • Site Profile: Occupational Medical Dose
    (Approved December 29, 2004)
    this document in PDF PDF 204 KB (23 pages)

  • Site Profile: Occupational Environmental Dose
    (Approved October 8, 2004)
    this document in PDF PDF 2 MB (96 pages)

  • Site Profile: Occupational Internal Dose section

    • Revised October 15, 2009
      this document in PDF PDF 1 MB (150 pages)

      Revision Includes: Incorporates information from documents not available at the time the original document was published. The current information available for uranium has been incorporated into Section 5.2.4. Clarification of MDAs, UNAA/DNAA analysis results, guidance for selection of enrichment, and a description of the new LANL Bioassay Repository database content have been included. Appropriate references have been added. For claims involving uranium UNAA bioassay results: Because of the ambiguity in the interpretation of the uranium bioassay results when results were transferred into the Bioassay Repository, the guidance in the TBD might not have been interpreted consistently by DRs and PRs. UNAA/DNAA data provided by LANL is for DU and EU rather than U-238 and U-235. A table providing an aged "pure" 238Pu mixture has been provided for use when exposures to heat source technology plutonium is suspected. Changes to the mixture might affect the total dose for plutonium intakes evaluated as "pure" 238Pu. In addition, the Tiger Team Assessment (DOE 1991), the Human Experiments and the details of the RaLa SEC Report (NIOSH 2006) have been included in the revision. Incorporates formal internal and NIOSH review comments. Adds Attributions and Annotations section. A description of the class of employees added to the SEC for SEC Petition-00051 was added to the text describing the class of employees added under SEC Petition-00061 (employees associated with RaLa operations). A new Section 5.2.4.6 was added describing the limitations on internal dose reconstruction for employees in the non-excepted TAs (as listed in the petition). Added statement about only partial dose reconstructions are possible for most TAs. A new bullet was added in Section 5.7.2, General Guidance, indicating that only partial internal dose reconstructions are possible. Incorporates methods for estimating maximum doses in accordance with the evaluation report for Petition SEC-00109, changes to address comments by OCAS commenters, updated dose reconstruction methodologies and references, and addition of an algorithm to guide dose reconstructors for dose calculation and dose assignment. Constitutes a total rewrite of the document.

    • Approved December 21, 2004
      this document in PDF PDF 923 KB (96 pages)

  • Site Profile: Occupational External Dose section

    • Occupational External Dose
      (Revised November 23, 2009)
      this document in PDF PDF 1 MB KB (77 pages)

      Revision Includes: Updated NIOSH references in Sections 6-1, 6-2, A-6 and Reference Section. Added details to the Scope in Section 6.1. In Section 6.2, "Reporting Practices" was modified to distinguish between LANL records with non-penetrating dose listed as "SHALLOW" vs. those listed as "SKIN." Several changes were made to remove dose reconstruction methods and information relating to periods when it has been determined to be infeasible to estimate external doses. Specifically, according to the HHS letter adding a class of LANL employees to the SEC (1943-1975), partial dose reconstructions may include external doses from gamma emitters in the years 1946-1975, neutrons from 1946-1975, and beta-emitters in the years 1949-1975. Incorporates formal internal and NIOSH review comments. No sections were deleted.

    • Revised May 30, 2007
      this document in PDF PDF 933 KB (76 pages)

      Revision Includes: Adds Purpose and Scope sections. Constitutes a total rewrite of document. Adds Attributions and Annotations section. Incorporates formal internal and NIOSH review comments. This revision results in an increase in assigned dose and a PER is required due to the addition of median photon adjustment values in Tables 6-22 and A-8; otherwise, the maximum values were replaced with lower 95th percentiles, and therefore would lower doses. An exception to the lower 95th-percentile values is the value for Other Operations, which is higher than the previously reported maximum value of annual geometric means. This change will result in a higher dose. Changes in Table A-7 will increase skin/shallow dose for LAMPF/LANSCE workers.

    • Approved May 10, 2005
      this document in PDF PDF 877 KB (72 pages)

  • Special Exposure Cohort (SEC) Petition Evaluation Report: Petition 109

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Page last updated: June 12, 2013
Page last reviewed: August 10, 2013
Content Source: National Institute for Occupational Safety and Health (NIOSH) Division of Compensation Analysis and Support