Department of Health and Human Services with stylized eagle made up of silhouetted human faces C D C
Department of Health and Human Services
Centers for Disease Control and Prevention

National Institute for Occupational Safety and Health (NIOSH)
Search NIOSH NIOSH Home NIOSH Topics Site Index Databases and Information Resources NIOSH Products Contact Us

NIOSH Program Area:

Radiation Dose Reconstruction

 

Mallinckrodt Chemical Co., Destrehan St. Plant
(Site Profile/Docket Number 014)

Location: St. Louis, Missouri

Also known as: Mallinckrodt Chemical Works
                         MCW
                         St. Louis Downtown Site

Site Profile

Basis for Development of an Exposure Matrix for the Mallinckrodt Chemical Company St. Louis Downtown Site and the St. Louis Airport Site, St. Louis, Missouri
(Revised November 22, 2010)
this document in PDF PDF 3 MB (242 pages)

Revision Includes: Incorporates SEC-00150 information in Section 1.0 for the St. Louis Airport Storage Site (SLAPS) as instructed by NIOSH. Additional changes in document include deletion of Sections 8.4, 8.6, and 8.8 and replacement of the material that is still applicable (considering the SEC determination) along with expanded instruction specific to SLAPS into a new Section, 9.0. In addition, the designation of covered periods noted in Section 1.0 was updated to reflect current program guidance. Incorporates formal internal and NIOSH review comments. Section 7.4 changed to clarify that medical x-ray exposure is not to be assigned at the Mallinckrodt Destrehan Street Plant due to the fact that the examinations were performed offsite. Section 1, 7.0 and 7.1 changed to clarify that external exposure to monitored employees is to be included in dose reconstructions for individuals employed prior to 1949. This exposure was previously excluded from dose reconstruction reports.

Top of Page

Technical Information Bulletins (TIBs)

  • Selected Geometric Exposure Scenario Considerations for External Dose Reconstruction at Uranium Facilities
    this document in PDF PDF 554 KB (16 pages)

    Note: Document was previously titled "Special External Dose Reconstruction Considerations for Mallinckrodt Workers."

    Document Number: DCAS-TIB-0013 Rev-01

    Revision Includes: Incorporates SC&A comments; reorganized procedure format; included dose reconstruction instructions for the application of geometric correction factors to the upper and lower torso; added information to clarify the bounding parameters associated with the Attila computation; NIOSH internal comments including procedure title change and applicability to other uranium facilities.

    Approved: November 23, 2010

Top of Page

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: Mallinckrodt Technical Basis Document (ORAUT-TKBS-0005) Revision
    this document in PDF PDF 88 KB (3 pages)

    Document Number: DCAS-PER-040 Rev-0

    Approved: September 10, 2013

    About this Document: Considers the effect of Revision 3 on claims that were completed using revision 2 or Revision 2 PC-1.

    Summary: For the ninety-one claims requiring further evaluation, dose was recalculated using all current dose reconstruction methods, including those in the current version of the TBD. From that recalculated dose, a new probability of causation was determined. The probability of causation remained below 45% for 86 of the 91 claims. For three of the remaining five claims, the probability of causation fell between 45% and 50%. In accordance with NIOSH procedures, IREP was run 30 times with 10,000 iterations for each run. The final probability of causation remained below 50% for all three claims. The final two resulted in a probability of causation greater than 50%. In both cases, this resulted primarily from the inclusion of monitored external dose between 1942 and 1948 that had not previously been included. NIOSH will notify DOL of all these results and request a return of the two claims that would now be greater than 50%.

  • Program Evaluation Report: Mallinckrodt Technical Basis Document (ORAUT-TKBS-0005) Revision
    this document in PDF PDF 16 KB (2 pages)

    Document Number: OCAS-PER-0015 Rev-00

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

    Approved: July 31, 2007

    Summary: It is not possible to determine the magnitude of the change to dose without a new dose estimate. Since (as of issuance of this PER) no Mallinckrodt claims have yet been completed with the newest revision to the TBD, NIOSH is requesting that all Mallinckrodt claims with a dose reconstruction performed using Revision 1 of ORAUT-TKBS-0005 that have a Probability of Causation less than 50% be returned for a new estimate. A list of the population of 16 potentially affected claims is attached. A new dose reconstruction will be completed for each of the claims using the latest revision to the Mallinckrodt TBD.

Top of Page

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 Mallinckrodt Chemical Co., Destrehan Street Plant:

At the current time, worker outreach activities have not been scheduled.

Top of Page

Comments on Mallinckrodt Chemical Company Documents

How to Submit Comments
Comments on Mallinckrodt Chemical Company 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 (014) on all comments.

Comments Received

Top of Page

Special Exposure Cohort Petition Information for Mallinckrodt Chemical Company

Top of Page

Previous Versions of Mallinckrodt Chemical Company Documents

  • Site Profile: Basis for Development of an Exposure Matrix for the Mallinckrodt Chemical Company St. Louis Downtown Site and the St. Louis Airport Site, St. Louis, Missouri

    • Page Change Revision May 25, 2009
      this document in PDF PDF 3 MB (225 pages)

      Page Change Revision Includes: Page change initiated to incorporate SEC information on pages 10-13 in Section 1.0 (extension of class to 12/31/1958) as instructed by NIOSH. Updated NIOSH required language on pages 10 and 11 in Section 1.0. Added information on pages 106-108 in Section 6.5. Updated NIOSH reference on pages 106-108, 124, 128 and 216 in Sections 7.1, 7.3, 8.5, 8.6, and Attachment A, respectively. Added reference on page 141 in Reference Section. On pages 158-160, updated NIOSH and ORAUT references in Reference Section. On page 210, updated NIOSH reference in Table A-34. Table A-40 on page 215 was revised to clarify that tabulated intakes represent gross alpha activity and to provide guidance on isotopic mixture to be applied. Incorporates formal internal and NIOSH review comments.

    • Revised June 14, 2007
      this document in PDF PDF 3 MB (222 pages)

      Revision Includes: Reflects comments of the ABRWH. Constitutes a total rewrite of the document. Modified Purpose and Scope, and Appendix A to incorporate SEC information as instructed by NIOSH. Made minor editorial changes to eliminate readily discernible errors and eliminated extraneous intake tables. Added information to reconstruct doses from available monitoring and coworker data for the period 1949-1962, and to clarify some discrepancies between the early-in-the program draft and current guidance. Deleted Appendix D (which was formerly C). This revision changes the method for assigning uranium, radium and thorium coworker intakes and radon exposures and eliminates the application of equilibrium amounts of uranium progeny intakes to reconstruct dose. Incorporates formal internal and NIOSH review comments. Revised dates for operational period in sections 6 and 7 to end in 1958. Removed references to unmonitored thorium and radium exposures (since reconstruction of such exposures has been determined to be not feasible by the SEC action). Added a section titled "unmonitored raffinate exposures" to cover the period 1948 - 1958 and inserted the text "reserved" to indicate that reconstruction of internal exposure from such pathways is not covered in this TBD for the time period 1948 - 1958. This revision results in an increase in assigned dose and a PER is required.

    • Revised March 10, 2005
      this document in PDF PDF 2.7 MB (248 pages)

      Revision Includes: Incorporated comments on Section 8.0 and to incorporate additional lately captured information. Revision to incorporate comments on Sections 7.0 and 8.0; to incorporate additional lately captured information regarding site work and external and radon exposure rates; to incorporate neutron exposure information; to incorporate information about the St. Louis Airport Site (SLAPS); and to provide additional guidance to dose reconstructors. Section 7.0, regarding external dose, remains on hold. Incorporated NIOSH comments.

    • Approved October 24, 2003
      this document in PDF PDF 1.3 MB (124 pages)


  • Special External Dose Reconstruction Considerations for Mallinckrodt Workers
    this document in PDF PDF 760 KB (10 pages)

    Note: Document title has changed to "Selected Geometric Exposure Scenario Considerations for External Dose Reconstruction at Uranium Facilities."

    Document Number: OCAS-TIB-0013 Rev-00

    About this Document: Provides guidance on the application of geometry-based dose correction factors to external dosimetry badge data for Mallinckrodt workers in particular job classifications

    Approved: October 26, 2005

Top of Page

Page last updated: September 16, 2013
Page last reviewed: August 10, 2013
Content Source: National Institute for Occupational Safety and Health (NIOSH) Division of Compensation Analysis and Support