Division of Compensation Analysis and

Support

Program Evaluation Report

Document Number: DCAS-PER-082

Effective Date: 01/08/2018

Revision No. 0

United Nuclear Corporation Page 1 of 2

Author: Signature on file Date: 01/08/2018 

 Dave Allen, HP Team Leader

Approval: Signature on file Date: 1/8/2018 

 J. W. Neton, Associate Director for Science

Supersedes: none

RECORD OF ISSUE/REVISIONS

ISSUE 

AUTHORIZATION 

DATE

EFFECTIVE

DATE

REV. NO. DESCRIPTION

01/08/2018 01/08/2018 0 New document to determine the effect of 

revisions to DCAS-TKBS-0008 (United 

Nuclear Corporation TBD) on previously 

completed claims.

1.0 Description

A United Nuclear Corporation (UNC) site specific appendix to Battelle-TBD-6001 

(Appendix D) was issued on 3/14/2008. This appendix was revised on 4/30/2010 and 

then superseded by a stand-alone Technical Basis Document (TBD) on 3/21/2011 

(DCAS-TKBS-0008 rev. 0). This TBD was then revised on 2/21/2017 (revision 1). 

The effect of these revisions on previously completed claims is the subject of this PER.

2.0 Issue Evaluation

Revision 1 of Appendix D increased neutron, photon and beta doses during the 

operational period as well as adding thorium intakes in 1964. When the Appendix was 

converted to a stand-alone TBD (DCAS-TKBS-0008) no changes were made to the dose 

estimates. However, revision 1 of DCAS-TKBS-0008 increased uranium intakes in 

1960-1962. This revision also increased uranium intakes during the residual period. 

The overall effect of the revisions are that at least one aspect of the dose estimate 

increased each year during the operational and residual periods. Therefore, all previously 
Division of Compensation Analysis and 

Support

Program Evaluation Report

Document Number: DCAS-PER-082

Effective Date: 01/08/2018 Revision No.: 0 Page 2 of 2

completed claims with employment at UNC will be reevaluated under this Program 

Evaluation Report (PER).

3.0 Plan for Resolving Corrective Action

A search of the NIOSH Claims Tracking System (NOCTS) database identified 37 claims 

with UNC employment that had a probability of causation (POC) of less than 50%. 

Three of these claims had been completed after revision 1 of Appendix D was issued and 

had no employment in the residual period or the 1960-1962 period. Therefore, they were 

unaffected by the additional revisions and were eliminated from further evaluation. 

Another claim met the same criteria but did have some employment in the residual 

period. The dose reconstruction was reviewed and determined that it was not affected by 

additional revisions so it was also removed from further evaluation. One additional claim 

was determined to have been pulled from dose reconstruction because it qualified as a 

member of the special exposure cohort (SEC). This case was removed from further 

evaluation since the compensability of the claim no longer depended on a dose 

reconstruction.

As a result of the search, 32 claims were found that needed further evaluation. The doses

for each of the 32 remaining cases were recalculated using revision 1 of the UNC TBD

(DCAS-TKBS-0008), as well as the current revision of any other applicable documents. 

Of the 32 claims, 31 resulted in a new POC below 45% and one resulted in a POC greater 

than 52%. NIOSH will provide the Department of Labor with the list of all the claims 

evaluated under this PER. Further, NIOSH will request the return of the 1 claim that 

would now result in a probability of causation greater than 50%.