Disclaimer 

This document is made available in accordance with the unanimous desire of the Advisory Board on 

Radiation and Worker Health (ABRWH) to maintain all possible openness in its deliberations. However, 

the ABRWH and its contractor, SC&A, caution the reader that at the time of its release, this report is predecisional and has not been reviewed by the Board for factual accuracy or applicability within the 

requirements of 42 CFR 82. This implies that once reviewed by the ABRWH, the Board’s position may 

differ from the report’s conclusions. Thus, the reader should be cautioned that this report is for 

information only and that premature interpretations regarding its conclusions are unwarranted. 

Working Draft 

ISSUES MATRIX FOR THE SAVANNAH RIVER SITE
 

SEC PETITION AND PETITION EVALUATION REPORT
 

FEBRUARY 2014 UPDATE
 

Contract Number 200-2009-28555 

Author
 

Arjun Makhijani
 

Prepared by 

S. Cohen & Associates
 

1608 Spring Hill Road, Suite 400
 

Vienna, Virginia 22182
 

Saliant, Inc. 

5579 Catholic Church Road
 

Jefferson, Maryland 21755
 

February 2014
 
 

 

 

 

 

 

 

 

 

 

 

 

Savannah River Site Issues Matrix 2 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 

INTRODUCTION
 

A draft issues matrix for the Savannah River Site (SRS) SEC Petition and Petition Evaluation 

Report (ER) was prepared in September 2009 (Privacy Act-cleared version, October 2010) 

pursuant to the Advisory Board of Radiation and Worker Health’s charge to SC&A to review the 

SRS SEC Petition (Petition number SEC-00103) and its associated ER, published by NIOSH on 

November 14, 2008 (NIOSH 2008), and the request of the Chair of the Work Group, Mark 

Griffon, that a first draft of an SEC matrix be prepared. 

The original September 2009 matrix (SC&A 2009a) was based on issues that were unresolved 

from the SC&A review of the SRS Site Profile, SC&A’s preliminary review of NIOSH’s ER 

(NIOSH 2010a), and SC&A’s preliminary review of the petition that was performed prior to the 

publication of the NIOSH ER (SC&A 2009b). It also drew on interviews completed by SC&A 

up to that date as part of its SEC petition review. NIOSH published the first addendum to its ER 

in 2010 (NIOSH 2010b). SC&A prepared an update of the outstanding issues in November 2010 

(SC&A 2010a) and a review of the first addendum in January 2011 (SC&A 2011a). NIOSH 

published a second addendum to its ER in August 2011 (NIOSH 2011). SC&A prepared a 

review of 10 claimant files (SC&A 2011e) to assess the completeness and adequacy of dosimetry 

records for the implementation of the inclusions of employees in the SEC recommended by 

NIOSH in NIOSH 2011. 

An update of the SRS SEC Issues Matrix followed the vote of the Advisory Board during its 

December 7–8, 2011, meeting in Tampa, Florida, to recommend an SEC for all employees, 

subcontractors, and subcontractors who worked at SRS between January 1, 1953, and September 

30, 1972, and otherwise met the employment duration qualifications. Both construction workers 

(CWs) and non-construction workers (NCWs) were included. The update was needed, since 

some of the issues were rendered moot by the vote so far as consideration of dose reconstruction 

feasibility in the SEC context is concerned. Other issue reviews will be more limited in time (so 

far as the SEC is concerned). Priorities may need to be revisited in light of the Board vote. Old 

priorities (from February 2011) are not indicated in this version. 

NIOSH produced a number of reports in 2012 and 2013. SC&A reviewed a number of them. In 

turn, NIOSH has responded to two of the major SC&A reviews (SC&A 2013a and 2013b). This 

update of the SRS matrix reflects the current status of each Matrix Issue. 

Note that the “relevance” of an issue as noted in the comment column refers only to SEC 

considerations and does not pre-judge the issue as a site profile issue for dose reconstruction for 

non-SEC cancers or its importance in terms of the possible magnitudes of doses received by 

workers. This matrix was prepared to provide a summary of SEC issues status. The term 

“resolved” therefore refers only to the status of the issue as it concerns SEC-00103. 
 

 

 

 

 

 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

1 Thorium up to 

1965 

7.1.1.8 Thorium work was carried out in a number of 

areas and dose reconstruction methods need to be 

specified. NIOSH had reserved the issue for 

further research up to 1960 in the ER, but 

extended the date to 1965 when it published an 

addendum to the ER in April 2010. 

NIOSH published Addendum 2 

to it evaluation report in August 

2011 (NIOSH 2011) 

recommending that workers 

with certain area and dosimetry 

codes who worked between Jan. 

1, 1953, and Sept 30, 1972, be 

added to the SEC because of the 

infeasibility of thorium dose 

reconstruction in certain 

buildings in this period. 

SC&A did an analysis of 

the completeness of area 

and dosimetry codes in 

the records of 10 

claimants (not a random 

sample). (SC&A 2011e) 

Resolved. Board 

recommended 

addition of all 

workers from Jan. 1, 

1953, to Sept. 30, 

1972 to the SEC. 

Includes CWs and 

NCWs. 

SC&A Update – February 21, 2014: This issue is resolved. 

2 Thorium, 

1965 onwards 

7.1.1.8 Thorium 1965 and after. No coworker model or 

specific approach to bounding dose was provided 

in the ER. 

See above up to September 30, 

1972. NIOSH is researching 

the thorium issue after that date. 

SC&A has provided draft 

reports to the Board 

indicating some thorium 

work after Sept. 30, 1972. 

Resolved up to Sept. 

30, 1972. Open after 

that. 

SC&A Update – February 21, 2014: NIOSH has published Addendum 3 to its Evaluation report (NIOSH 2012). NIOSH has also published its internal coworker dosimetry 

data in ORAUT 2013a and a revision of that document (ORAUT 013b). SC&A has reviewed NIOSH 2012 and the data relating to thorium that NIOSH proposes to use (SC&A 

2013a). NIOSH has responded to SC&A’s review (NIOSH 2014a). SC&A is reviewing the new information in ORAUT 2013b and NIOSH 2014a and provided its comments 

during the Work Group meeting held on February 5, 2014, and will provide further comments during the conference call scheduled for February 26, 2014. SC&A’s review of 

NIOSH SRS coworker models is connected with its review of NIOSH’s proposal to aggregate internal monitoring data according to a “One Person-One Sample” (OPOS) method, 

as described in ORAUT 2012a. SC&A’s review of the OPOS method, in general, has been issued to the SEC Work Group (SC&A 2014). SC&A’s review of OPOS includes 

some SRS-specific matters. SC&A’s SRS-specific finding is that SRS non-construction worker (NCW) data cannot be used for the estimation of unmonitored construction trades 

worker (CTW) internal doses for a variety of reasons. NIOSH disagrees and contends that it can. 

3 Recycled 

Uranium (RU) 

7.1.1.2 This issue is in part a carry-over from the SC&A 

TBD review (SC&A 2005, p. 71). A timeline for 

the RU operations has not been published. 

Some revised trace contaminant 

data were provided in July 2010 

(NIOSH 2010b) using DOE RU 

publications and a 1984 SRS 

document as references. A start 

SC&A started a review of 

the NIOSH ratios and 

associated reference 

material. Report 

preparation was stopped 

Relevant only after 

Sept. 30, 1972. 

Savannah River Site Issues Matrix 3 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

date of 1955 for RU was 

provided. 

pending resolution of 

issues related to ER 

addenda. 

SC&A Update – February 21, 2014: SC&A is preparing a review of the RU ratios; the review is scheduled to be completed by June 2014. 

4 Trivalent 7.1.1.5, Trivalent actinides: Am, Cm, and Cf. There are NIOSH proposes to use SC&A awaits the SC&A has not 

actinides Am, 7.1.1.6, no data for Cm-244 until 1963 (ER Fig. 7-1). measured data or coworker coworker model and will checked the ending 

Cm, and Cf 7.1.1.7 Data analysis and coworker models have not 

been provided for any period. Relevance of later 

data to earlier periods has not been established. 

Relationship between NCW and CW intakes for 

trivalent radionuclides in the period before 

monitoring began and after monitoring began has 

not been established. Where NIOSH proposes to 

use gross alpha data (e.g., for Cf-252, method for 

selecting workers for assigning dose and 

selecting the radionuclide) have not been 

scientifically established. The resulting dose 

estimates would need to be examined for validity 

and reasonableness. Californium-252 

assignment would also need to be reviewed in 

relation to spontaneous fission-related organ 

doses (including neutrons from spontaneous 

fission after intake). 

models for estimating dose with 

sufficient accuracy (ER 

Sections 7.1.1.5 to 7.1.1.7). 

Since data were collected for all 

three trivalent radionuclides 

rather than each separately, 

NIOSH proposes to assign the 

result to Cf-252 as appropriate 

(ER, p. 51). NIOSH has not yet 

published its coworker model. 

NIOSH has specified an ICRP 

model for Cf-252 spontaneous 

fission. 

be review it when it is 

available. SC&A agrees 

with NIOSH regarding 

the ICRP model for Cf252. 

date for these 

radionuclides. Now 

only relevant after 

Sept 30, 1972. 

SC&A Update – February 21, 2014: NIOSH has published a coworker model for trivalent actinides (ORAUT 2012c). Many of the findings for thorium in SC&A 2013a apply 

to NIOSH’s proposed methods for coworker trivalent actinide dose estimation because NIOSH proposes to use trivalent actinide monitoring data for thorium dose reconstruction. 

Therefore, SC&A has not reviewed ORAUT 2012c as such, pending resolution of the findings in SC&A 2013a that also apply to ORAUT 2012c. SC&A notes that SC&A 2013a 

does not address adequacy or completeness of SRS trivalent actinide data for coworker modeling of those three radionuclides (Am, Cm, Cf). 

Savannah River Site Issues Matrix 4 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

5 Np-237 7.1.1.4 Data analysis and coworker model not provided. 

Adequacy of data for coworker model not 

established. Applicability of back-extrapolation 

of data from 1960s and after to pre-1960 period 

not established. 

NIOSH proposes to use data for 

the workers who were 

monitored to reconstruct their 

dose and a coworker model for 

the rest. Data available from 

1960 onward in claimant 

database. NIOSH has not yet 

published its coworker model. 

SC&A awaits the 

coworker model and will 

review it when it is 

available. 

Now relevant only 

after Sept. 30, 1972. 

SC&A Update – February 21, 2014: NIOSH has published a coworker model for Np-237 (ORAUT 2012b), which SC&A has reviewed (SC&A 2013b). NIOSH has responded 

to SC&A’s review (NIOSH 2014b). SC&A provided its comments regarding NIOSH 2014b at the meeting held on February 5, 2014, and will provide further comments during 

the during the Work Group conference call scheduled for February 26, 2014. SC&A’s review of NIOSH SRS coworker models is connected with its review of NIOSH’s proposal 

to aggregate internal monitoring data according to a “One Person-One Sample” (OPOS) method (ORAUT 2012a). SC&A’s review of the OPOS method, in general, has been 

issued to the SEC Work Group (SC&A 2014). SC&A’s review of OPOS includes some SRS-specific matters. SC&A’s SRS-specific finding is that SRS non-construction worker 

(NCW) data cannot be used for the estimation of unmonitored construction trades worker (CTW) internal doses for a variety of reasons. NIOSH disagrees and contends that it 

can. 

6 Fission and 

activation 

products 

7.1.1.9 Validity of back-extrapolation of Sr-90 data has 

not been established. Adequacy of fission 

product monitoring data for coworker model has 

not been established. ER states that strontium 

radioisotope monitoring began in the “late 

1950s.” The proposed coworker model has not 

been published. 

NIOSH has not yet published its 

coworker model. 

SC&A awaits the 

coworker model and will 

review it when it is 

available. 

Now relevant only 

after Sept. 30, 1972. 

SC&A Update – February 21, 2014: NIOSH has published a coworker model for mixed fission and activation products (ORAUT 2012d). Some of the findings for thorium and 

neptunium in SC&A 2013a and SC&A 2013b apply to NIOSH’s proposed methods for mixed fission and activation products. SC&A has not reviewed ORAUT 2012d, as such, 

pending resolution of the findings in SC&A 2013a and SC&A 2013b that also apply to ORAUT 2013d. SC&A notes that SC&A 2013a and SC&A 2013b do not address 

adequacy or completeness of SRS mixed fission and activation product data for coworker modeling of those radionuclides. 

7 Co-60 7.1.1.10 Validity of use of fission product data prior to 

1960 has not been established. Coworker model 

has not been published. ER does not address the 

NIOSH has not yet published its 

coworker model. 

SC&A awaits the 

coworker model and will 

review it when it is 

Now relevant only 

after Sept. 30, 1972. 

Savannah River Site Issues Matrix 5 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

issue of incidents. Individual bioassay data or 

coworker model based on claimant data will be 

used. Targets were encapsulated (comment in 

TBD matrix). The potential similarity of the 

irradiation of encapsulated sources is noted in the 

July 7, 2007, Work Group meeting notes. 

available. 

SC&A Update – February 21, 2014: NIOSH covered Co-60 in its report on “exotic radionuclides” (ORAUT 2012e). NIOSH states that whole body counting data are available. 

There is no indication of production after October 1, 1972, in ORAUT 2012e. SC&A has not reviewed this ORAUT 2012e. 

8. Po-210 7.1.1.11 The coworker model has not been published. 

Incidents are not addressed. Relationship of CW 

to NCW intakes has not been established. 

NIOSH published a paper on 

Po-210 in January 2011 

(ORAUT 2011). The Po-210 

program at SRS ended in 1970. 

No review needed. Resolved by the 

Board SEC vote. 

Ending date may need 

to be checked. 

SC&A Update – February 21, 2014: NIOSH’s report on exotic radionuclides (ORAUT 2012e) includes further information on Po-210 and does not provide any indication of 

production of Po-210 after October 1, 1972. SC&A has not further checked the ending date for Po-210 production at SRS. SC&A recommends that this issue be tentatively 

closed. 

9 Tritium 7.1.1.1 NIOSH has not demonstrated that the TBD 

approach of applying environmental doses to 

unmonitored workers (no badge, no bioassay) 

and reporting level to workers with external 

monitoring only is suitable for unmonitored 

CWs. NIOSH has not demonstrated that it has a 

bounding dose approach for tritium for CW. 

NIOSH published a report on 

use of tritium data for CW 

exposure estimation in 

November 2010 (ORAUT 

2010). NIOSH is preparing a 

second part of this report that 

specifically addresses CW vs. 

NCW exposure. 

SC&A published a report 

that included tritium, 

comparing CW and NCW 

data in January 2010 

(SC&A 2010b) and 

another in November 

(SC&A 2010c) using a 

larger tritium bioassay 

database provided by 

NIOSH. Both indicate 

that CWs had higher 

bioassays than NCWs in 

some areas, some periods, 

and some job types. 

SC&A will produce a 

Only the data from 

Oct. 1, 1972, onward 

will be evaluated. 

There have been 

tritium/tritides-related 

data capture visits and 

interviews (NIOSH 

and SC&A). SC&A 

tritium interview 

summary has been 

merged with a prior 

summary of other 

issues. Combined 

summary is being sent 

to DOE for 

Savannah River Site Issues Matrix 6 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

single review of NIOSH’s 

tritium report when the 

second part is published. 

classification review. 

SC&A Update – February 21, 2014: NIOSH published Part 2 of its tritium report in November 2011 (Stancescu and Watkins 2011). SC&A has not resumed its review of 

tritium-specific issues pending resolution of findings relating to Issues 2, 4, 5, and 6, as well as general issues relating to the methods by which CTW and NCW monitoring data 

can be compared and/or combined (Matrix Issue 13). 

10 Special tritium 

compounds 

for CWs 

ER refers to ORAUT-OTIB-0066 for special 

tritium compound exposure. Relationship of CW 

to NCW exposure to special tritium compounds 

or some other means of bounding CW exposure 

to them needs to be established. OTIB-0066, 

which discusses a method to calculate doses due 

to exposure to special tritium compounds, is not 

specific to SRS and does not discuss dose 

reconstruction issues for such compounds 

specific to CWs. 

The solubility of one – 

lanthanum-nickel hydride – is 

under investigation at SRS. 

NIOSH is completing a draft of 

its interview notes. 

SC&A awaits the NIOSH 

approach to estimating 

tritide doses. 

See above Issue 9 for 

interview status. 

SC&A Update – February 21, 2014: NIOSH has not published any data regarding tritides since the last matrix update in 2011. 

11 Exotic 

radionuclides 

7.1.1.9 in 

part 

About 150 radionuclides were produced at SRS, 

and targets were fabricated there (ORAUT 2006, 

p. 25). No analysis of the production processes 

is provided, nor are there any descriptions of 

incidents. The incident database is incomplete, 

which was one of SC&A’s findings in its TBD 

review (see below). The lack of analysis may be 

parallel to the situation at Y-12, where a large 

number of isotopes were produced, with the 

difference that at Y-12, they were produced in 

accelerators, and at SRS, they were produced in 

reactors. No documentation of the encapsulation 

processes is provided. The exceptions to the 

NIOSH will respond to the 

SC&A report on exotic 

radionuclides. NIOSH will also 

sort out what other 

radionuclides were produced 

that are not in the SC&A report. 

NIOSH will specify dose 

reconstruction methods with 

due attention to the criteria for 

exotic radionuclides presented 

by Jim Neton to the Board 

during the November 2010 

SC&A provided the Work 

Group with a report on 

exotic radionuclides in 

December 2010 (SC&A 

2010d). 

Only relevant after 

Sept 30, 1972. 

Savannah River Site Issues Matrix 7 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

coverage of radionuclides by whole-body 

counting are not discussed. There is no 

discussion of whether any of the target materials 

were themselves radioactive. 

Santa Fe Board meeting. 

SC&A Update – February 21, 2014: NIOSH published a report on exotic radionuclides in 2012 (ORAUT 2012e). SC&A 2010d raised a question whether an exotics 

production program that was proposed in 1969 was ever pursued. NIOSH did not find any evidence that it was (ORAUT 2012e, p. 12). SC&A has not reviewed this finding. 

Most of ORAUT 2012e covers the pre-1972 period. SC&A has not further reviewed the periods of exotic radionuclide production beyond that in SC&A 2010d. 

12 Internal dose 

due to 

incidents 

5.2.3, 7.3.6 The Special Hazards Investigations list is 

incomplete. In its Tank Farm Fault Tree 

Databank, the site acknowledged that many early 

tank farm area incidents were not recorded (until 

1965). The ER states that there are incident 

records, including the Special Hazards 

Investigation files, and that NIOSH has data 

relating to incidents (ER, p. 29). No evidence of 

cover up of incidents was found, and NIOSH can 

bound dose in any case (ER p. 71). 

NIOSH will respond to the 

SC&A report. NIOSH may 

follow up with workers 

interviewed by SC&A. 

SC&A prepared a report 

on extent of and potential 

gaps in incident 

documentation in worker 

records to elaborate on its 

TBD review finding 

(SC&A 2011b). 

Interviews also 

indicate that there 

were unrecorded 

incidents. Only 

relevant after Sept 30, 

1972. 

SC&A Update – February 21, 2014: NIOSH has not responded to SC&A 2011b. The issue remains open. 

13 Overall CW to 

NCW internal 

dose relation 

7.1 ER states that ORAUT-OTIB-0052 (ORAUT 

2007) found NCW intakes “were generally 

higher than construction trades workers” (ER, p. 

39). OTIB-0052 suggests a 1:1 ratio for CW to 

NCW intakes. SC&A analysis indicates that the 

assumption that NCW intakes (as indicated by 

bioassay data) would be generally higher than for 

CW is not generally valid. The adequacy of 

bioassay data for constructing coworker models 

needs to be examined for different periods, areas, 

radionuclides, and types of CWs. 

NIOSH has produced an 

analysis of tritium data 

comparing CWs to all workers 

(including CWs) (ORAUT 

2010). NIOSH is preparing a 

second part comparing CWs to 

NCWs. NIOSH is also revising 

OTIB-0052. NIOSH included 

both CWs and NCWs in its 

thorium SEC recommendation 

in the ER Addendum 2 (NIOSH 

Besides the two reviews 

of CWs vs. NCWs 

(SC&A 2010b and SC&A 

2010c), SC&A also 

produced a report 

evaluating the plutonium 

database used in OTIB0052 (SC&A 2010e). 

SC&A also published a 

master interview 

summary as part of 

SC&A 2011b; this 

CW vs. NCW 

resolved up to Sept 

30, 1972, by Board 

vote of 8 Dec. 1972 

since both CW and 

NCW were included 

in the SEC 

recommendation. 

Also issues 19 

(tentatively) and 21 

are closed. A 

considerable amount 

Savannah River Site Issues Matrix 8 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

2011). summary contains some 

discussion of CW vs. 

NCW matters. SC&A 

was to review NIOSH’s 

revision of OTIB-0052 

when it is published. 

SC&A will await 

instructions on this issue, 

given the December 8, 

2011, Board vote on the 

SRS SEC to include CWs 

and NCWs. 

of work has been 

done by NIOSH and 

SC&A as indicated in 

the reports cited here. 

The Work Group had 

directed tritium data 

as the current focus of 

this issue to be 

followed by uranium. 

This is still an 

outstanding issue for 

the period after Sept. 

30, 1972. Issue may 

need re-assessment in 

light of the inclusion 

of both CWs and 

NCWs in the SEC up 

to Sept. 30, 1972. 

SC&A Update – February 21, 2014: This issue is being covered under the review of coworker models for specific radionuclides as well as in SC&A’s review of the NIOSH’s 

“One-Person-One-Sample” aggregation of monitoring data. A number of findings relating to CTW dose reconstruction, comparison on NCW and CTW distributions of 

measurements, and NIOSH’s coworker models remain open. 

14 Special 

Exposure 

Conditions 

7.4.2 There are several areas of concern that can be 

described as “special exposure conditions,” 

including off-normal or unauthorized work 

practices, burning of spent tributyl phosphate in 

open pans in the early years (to 1971), and high 

exposure potential during certain authorized 

work practices, such as opening tank risers or 

cleanup of high-level waste leaks. 

NIOSH has stated that it has air 

concentration data in the 

burning ground area, and that it 

will provide a dose 

reconstruction approach. 

See comment column. SC&A worker 

interviews done as 

part of the SEC 

investigation also 

indicate off-normal 

practices and high 

exposure potential 

during certain types of 

work, including in the 

Tank Farms. A 

master summary of 

Savannah River Site Issues Matrix 9 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

SC&A’s interviews 

(excluding tritides) is 

in SC&A 2011b. The 

burning ground issue 

is no longer relevant, 

since open pan 

burning ended in 

February 1972 

(Conner et al. 2000, p. 

1068 of the pdf file). 

SC&A Update – February 21, 2014: This issue has been subsumed under Matrix Issue 12 for the period October 1, 1972, through 2007. 

15 Construction 

worker job 

types 

Worker intakes and coworker models may have 

to be built by CW job type in order to ensure that 

the models are bounding doses (or more accurate 

than bounding doses). 

This issue is merged 

into Issue 13 above. 

SC&A Update – February 21, 2014: See update for Matrix Issue 13. 

16 OTIB-0075 

validity for 

SEC use – 

internal dose 

7.1, 7.3.4, 

7.4.2 

The use of ORAUT-OTIB-0075, which asserts 

representativeness of claimant data for the whole 

worker population for SRS CW SEC is 

questionable. 

NIOSH also produced a report 

on data with a significant 

fraction of “less-than” results 

that is general, but also applies 

to the SRS SEC. (ORAUT 

2009). 

SC&A did a review of 

OTIB-0075 (SC&A 

2010b). SC&A also 

reviewed ORAUT 2009 

(SC&A 2010f). 

This issue is merged 

into Issue 13 above. 

SC&A Update – February 21, 2014: See update for Matrix Issue 13. 

Savannah River Site Issues Matrix 10 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

17 Early neutron 

dose to 1961 

7.2.2.2 Fig. 7-3 of the ER (p. 65) shows no neutron 

monitoring data for the 200-F Area until about 

1958, and generally less than 20 badges per cycle 

until 1962 (except for part of 1959). This was 

“one of the highest neutron-exposure areas at 

SRS,” according to the ER (p. 64). The entire 

early period will have to depend almost 

exclusively on area neutron and photon 

monitoring data. The relationship of the n/p ratio 

data to workers and their personnel neutron 

exposure experience will need to be established 

with essentially no reference to actual monitoring 

data. It is unclear whether there are any early 

neutron monitoring data for CWs. 

NIOSH will use an approach 

based on n/p ratios. On Feb. 3, 

2011, NIOSH reported no 

progress on this item, which has 

been pushed down the list of 

priorities due to many other 

action items. NIOSH will 

provide a date when this will be 

done. NIOSH stated it has the 

data to do dose reconstruction. 

This issue is resolved 

by the Dec. 8, 2011, 

Board vote. 

SC&A Update – February 21, 2014: This issue has been resolved. 

18 Neutron dose 

1962-1971 

6.2 and 7.2.2 ER acknowledges unmonitored dose at SRS due 

to neutrons, since monitoring was required only 

when area neutron dose rates were in excess of 1 

mrem per hour. Neutron data are very sparse in 

general up to the mid-1960s, and sparse even 

after that. Representativeness of area monitoring 

for worker exposure and representativeness of 

available n/p data for all workers in the class 

needs to be assessed. Additionally, back 

extrapolation of post-1972 data was proposed in 

the TBD. It is unclear whether there will be 

back-extrapolation to demonstrate bounding 

dose; if there is, the validity of such backextrapolation may need to be examined. 

Validity of assumption of low neutron doses in 

the reactor areas needs to be examined. 

NIOSH had stated that it has 

paired neutron and photon data 

and may issue a report in March 

2011. 

This issue is resolved 

by the Board vote of 

Dec. 8, 2011. 

Savannah River Site Issues Matrix 11 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

Validity of implicit assumption that CW neutron 

doses were lower than NCWs needs to be 

examined in view of the higher bioassay results 

for some periods and radionuclides, including 

plutonium in some periods. 

SC&A Update – February 21, 2014: This issue has been resolved. 

19 Test reactor 

neutron dose 

Neither the ER nor the TBD analyzes the neutron 

dose at the Heavy Water Components Test 

Reactor. Issue of an incident was raised in a 

worker interview done by SC&A. 

NIOSH is addressing neutron 

doses as part of issues 17 and 

18 above. 

SC&A research did not 

result in any specific 

information about this 

accident (such as date and 

accident description). 

One SC&A 

interviewee indicated 

an incident took place 

at this reactor (crack 

in the core). No 

further information 

was available from 

the interviewee and 

no information on 

such an incident was 

found in document 

research done by 

SC&A. As a result, 

this issue has been 

tentatively closed. 

SC&A Update – February 21, 2014: No information that would warrant a reopening of this issue has come to light since the last matrix update. 

20 Tank Farm 

exposure 

geometry 

NIOSH to estimate the geometry of exposure in 

special work situations, such as those described 

in the F and H Area Tank Farm Fault Tree 

Databank, and the frequency with which these 

corrections may need to be applied to external 

dose. While correction factors can, in principle, 

be calculated, it is not clear that a scientifically 

valid set of scenarios, including time worked and 

NIOSH is preparing a model for 

developing adjustment factors 

due to geometry of exposure in 

the tank farm. 

SC&A will review the 

NIOSH report when it is 

published. 

A more general issue 

of geometry, and 

specifically hand 

exposure, has been 

raised in worker 

interviews. NIOSH is 

preparing a tank farm 

geometry report. 

Savannah River Site Issues Matrix 12 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

radiological conditions, can be constructed. Work Group needs to 

NIOSH has not addressed this issue in the ER. address whether work 

beyond that is needed 

for SEC review. 

Open pan burning 

issue is not relevant, 

since it ended in Feb. 

1972. 

SC&A Update – February 21, 2014: NIOSH has stated that it is using MCNP modeling to address this issue. The final model has not been published. This issue was put into a 

low priority since external dose geometry issues have been satisfactorily resolved in the past and have not been SEC issues (ABRWH 2013, pp. 57–64). 

21 External 

exposure coworker data 

adequacy for 

CW 

7.2.1.3 ORAUT-OTIB-0052 is claimant favorable for a 

large majority of CWs. However, it is not 

claimant favorable for some categories. A 

bounding dose (or better) demonstration needs to 

be made for all CW job types. 

A suitable adjustment has been 

made for all CWs. No further 

work is needed. 

SC&A agrees that 

existing databases can be 

used for CW coworker 

external dose estimation 

with appropriate adjustment. This does not 

include issues 22 and 23, 

which do not concern 

coworker data adequacy. 

See SC&A review of 

OTIB-0052 (SC&A 

2007). 

SC&A Update – February 21, 2014: This issue has been resolved. 

22 Badges not 

capturing dose 

SC&A worker interviews suggest that workers 

kept their badges out of higher radiation areas in 

order not to exceed dose limits, or sometimes 

CWs would be in radiological situations without 

knowing it (one incident is described when 

workers were working with radioactive tools 

NIOSH will review the SC&A 

report. 

SC&A prepared a report 

compiling worker issues 

relating to radiation dose 

as it was experienced 

compared to dose that 

was recorded. This 

includes Matrix Issue 23 

Savannah River Site Issues Matrix 13 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

thought initially to be clean). (SC&A 2011c). 

SC&A Update – February 21, 2014: NIOSH has not responded to SC&A 2011c. 

23 External dose 

recording 

accuracy and 

completeness 

7.3 Petitioners raised the issue of working conditions 

with high dose rates when badge dose may have 

been under-recorded or not recorded (such as 

weekend work) and/or pencil dosimeters were 

off-scale, or when there are zero doses in the 

record. An issue connected to this would be 

whether the HPAREH database reflects actual 

work experience. Petitioners also state that in 

some cases, workers thought they were working 

in clean areas that were then determined to be 

contaminated. 

NIOSH will respond to the 

SC&A report. 

SC&A 2011c covers both 

Matrix Issues 22 and 23. 

This issue has been 

merged with Issue 22 

above. SC&A 

prepared a single 

report on Matrix 

Issues 22 and 23. 

SC&A Update – February 21, 2014: See update on Matrix Issue 22. 

24 Early 

monitoring 

data 

Various The ER has addressed lack of early monitoring 

data for many workers and radionuclides by a 

number of devices, including building coworker 

models, using reporting levels, using air 

monitoring data, and estimating neutron to 

photon ratios. While each of these needs to be 

assessed in its own right (as described in the 

issues listed above), an overall assessment of 

early recordkeeping practices, adherence to 

procedures, and adequacy of data appears to be 

warranted. 

This issue had been 

merged with other 

issues, but is no 

longer an SEC issue 

in view of the Board 

vote on Dec. 8, 2011. 

SC&A Update – February 21, 2014: This Matrix Issue has been resolved. 

25 Environmental None Using dispersion modeling of stack source terms See issue 14. This issue has been 

Savannah River Site Issues Matrix 14 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

December 2011 Update of Issues Matrix for the SRS SEC Petition and Petition ER 

Matrix 

Issue No. 

Issue Brief ER Section 

No. Issue Description NIOSH Issue Status SC&A review status Comments 

dose as described in the TBD and referred to in the ER 

(p. 72) is not appropriate for onsite SRS workers. 

For instance, thousands of gallons of solvents 

contaminated with fission products and 

plutonium were burned in the Burning Ground. 

Use of a Gaussian plume model is not 

appropriate here, especially for particles greater 

than half a micron. Furthermore, the 

resuspension factor does not appear to be 

claimant favorable and is not entirely appropriate 

for this class of problem. It may not be claimant 

favorable by three or four orders of magnitude. 

Even for stack releases, one potentially 

significant issue is the non-conservatism of the 

standard Gaussian model used in the TBD, where 

it pertains to “non-standardized” short-term 

releases occurring during stable atmospheric 

conditions. 

merged with Issue 14. 

Now resolved since 

open-pan burning 

stopped in Feb. 1972. 

See comment for 

Issue 14 above. 

SC&A Update – February 21, 2014: Merged with issue 14. This Matrix Issue has been resolved for open pan burning. 

26 Additional 

worker and 

worker 

representative 

issues 

Worker and petitioner representatives raised 

various issues during Work Group meetings and 

comment periods. 

NIOSH will respond to SC&A 

report. 

SC&A compiled a report 

detailing the issues raised 

and categorized them, 

with an indication of 

where the issue was 

already covered by an 

existing matrix issue 

(SC&A 2011d). 

SC&A Update – February 21, 2014: NIOSH has not provided a specific response to SC&A 2011d. The issues raised in SC&A 2011d are broadly similar to Matrix Issues 12 

and 22/23 in most cases, but workers provided specific additional examples, such as lack of HP coverage in some cases. 

Savannah River Site Issues Matrix 15 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

 

 

 

 

 

References 

ABRWH 2013. Transcript of the teleconference meeting of the Work Group on the Savannah 

River Site, Advisory Board on Radiation and Worker Health, February 12, 2013, on the web at 

http://www.cdc.gov/niosh/ocas/pdfs/abrwh/2013/wgtr021213.pdf 

Conner et al. 2000. K.R. Conner, J. Leyba, A Preston, Workplan/RCRA Facility 

Investigation/Remedial Investigation Report for the Old Radioactive Waste Burial Ground 643-

E, S01-S22- Volume I–Text and Volume II–Appendices, Westinghouse Savannah River 

Corporation, WSRC-RP-00127, Rev. 1.4. August 2000. On the web at 

http://sti.srs.gov/fulltext/WSRC-RP-97-00127.pdf 

NIOSH 2008. SEC Petition Evaluation Report Petition SEC-00103, November 14, 2008. 

NIOSH 2010a. SEC Petition Evaluation Report Petition SEC-00103, Addendum, April 28, 

2010. 

NIOSH 2010b. Timothy D. Taulbee, ABRWH SRS Workgroup NIOSH Action Item List: 

Responses and Status, NIOSH, National Institute for Occupational Safety and Health, Cincinnati, 

Ohio. July 19, 2010. On the O-Drive at O:\AB Document Review\SRS\DCAS Docs. 

NIOSH 2011. SEC Petition Evaluation Report Petition SEC-00103, Addendum 2, August 9, 

2011. 

NIOSH 2012. SEC Petition Evaluation Report: SEC-00103, Addendum 3, National Institute for 

Occupational Safety and Health, Cincinnati, Ohio. November 20, 2012. 

NIOSH 2014a. Draft Responses to Review of Addendum 3 to the NIOSH Savannah River Site 

Special Exposure Cohort (SEC-00103) Evaluation Report, National Institute for Occupational 

Safety and Health, Cincinnati, Ohio. January 16, 2014. 

NIOSH 2014b. Response to the SC&A Report “Review of the Methods for Estimating 

Neptunium-237 Intakes at the Savannah River Site for the Period 1972-2007,” National Institute 

for Occupational Safety and Health, Cincinnati, Ohio. January 9, 2014. 

ORAUT 2006. Savannah River Site: Technical Basis Document, ORAUT-TKBS-0003, 

Revision 04-E, unpublished, Oak Ridge Associated Universities Team, Cincinnati, Ohio. 

November 6, 2006. On the O-Drive. 

ORAUT 2007. Parameters to Consider When Processing Claims for Construction Trade 

Workers, ORAUT-OTIB-0052; Rev. 00 PC-1. Oak Ridge Associated Universities Team, 

Cincinnati, Ohio. January 16, 2007. SRDB Ref ID: 29978. 

ORAUT 2009. Analysis of Bioassay Data with a Significant Fraction of Less-Than Results, 

ORAUT-RPRT-0044, Rev. 00-A, Oak Ridge Associated Universities Team, Cincinnati, Ohio. 

2009. 

Savannah River Site Issues Matrix 16 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

 

 

 

 

 

ORAUT 2010. Thomas R. LaBone, Discussion of Tritium Coworker Models at the Savannah River 

Site – Part 1. ORAUT-RPRT-0049, Rev. 00, Oak Ridge Associated Universities Team, 

Cincinnati, Ohio. November 23, 2010. 

ORAUT 2011. James Mahathy, Feasibility of Reconstructing Doses Received from Potential 

Exposures to Polonium at Savannah River Site. ORAUT-RPRT-0048, Oak Ridge Associated 

Universities Team, Cincinnati, Ohio. January 24, 2011. 

ORAUT 2012a. Analysis of Stratified Coworker Datasets, ORAUT-RPRT-0053, Rev. 01, Oak 

Ridge Associated Universities Team, Cincinnati, Ohio. July 16, 2012. 

ORAUT 2012b. A Comparison of Coworker Models for Neptunium at the Savannah River Site, 

Rev. 00, ORAUT-RPRT-0056, Oak Ridge Associated Universities Team, Cincinnati, Ohio. 

August 20, 2012. 

ORAUT 2012c. A Comparison of Exotic Trivalent Radionuclide Coworker Models at the 

Savannah River Site, ORAUT-RPRT-0055, Rev. 00, Oak Ridge Associated Universities Team, 

Cincinnati, Ohio. July 20, 2012. 

ORAUT 2012d. A Comparison of Mixed Fission and Activation Product Coworker Models at 

the Savannah River Site, ORAUT-RPRT-0058, Rev. 00, Oak Ridge Associated Universities 

Team, Cincinnati, Ohio. September 10, 2012. 

ORAUT 2012e. Exotic Radionuclides at the Savannah River Site, ORAUT-RPRT-0054, Rev. 

00, Oak Ridge Associated Universities Team, Cincinnati, Ohio. January 20, 2012. 

ORAUT 2013a. Internal Coworker Dosimetry Data for the Savannah River Site, ORAUTOTIB-0081, Rev. 01, Oak Ridge, Associated Universities Team, Cincinnati, Ohio. April 1, 2013 

ORAUT 2013b. Internal Coworker Dosimetry Data for the Savannah River Site, ORAUTOTIB-0081, Rev. 02, Oak Ridge, Associated Universities Team, Cincinnati, Ohio. December 

16, 2013. 

SC&A 2005. Review of the Site Profile for the Savannah River Site, S. Cohen & Associates, 

Vienna, Virginia. March 21, 2005. 

SC&A 2007. Review of ORAUT-OTIB-0052, Parameters to Consider when Processing Claims 

for Construction Trade Workers, Revision 1, S. Cohen & Associates, Vienna, Virginia. July 

2007. 

SC&A 2009a. Issues Matrix for the Savannah River Site SEC Petition and Petition Evaluation 

Report, S. Cohen & Associates, Vienna, Virginia. September 2009. 

SC&A 2009b. “Paper Study” Evaluation of Special Exposure Cohort (SEC) Petitions, SEC00103 and SEC-00104, Related to Construction Workers’ Exposures at the Savannah River Site. 

S. Cohen & Associates, Vienna, Virginia. March 2009 

Savannah River Site Issues Matrix 17 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

 

SC&A 2010a. Arjun Makhijani, memorandum to Savannah River Site Work Group (Chair – 

Mark Griffon). Subject: Status of SC&A’s Action Item List from the May 5, 2010 Work Group 

meeting with Updates and Task List from the Nov. 10, 2010, Work Group meeting highlighted in 

yellow. S. Cohen & Associates, Vienna, Virginia. November 18, 2010. 

SC&A 2010b. Review of ORAUT-0075: Use of Claimant Datasets for Coworker Modeling for 

Construction Workers at Savannah River Site, S. Cohen & Associates, Vienna, Virginia. 

January 2010. 

SC&A 2010c. Harry Chmelynski, Comparison of Claimant Tritium Samples from Construction 

Trade Workers and Non-Construction Workers at Savannah River Site. S. Cohen & Associates, 

Vienna, Virginia. November 2010. 

SC&A 2010d. Arjun Makhijani, memorandum to Savannah River Site Work Group (Chair – 

Mark Griffon), List of Exotic Radionuclides at Savannah River Site and Dose Reconstruction 

Issues Associated with Them in the Context of the Savannah River Site Construction Trade 

Workers Special Exposure Cohort Petition, Savannah River Site Matrix Issue 11, Exotic 

Radionuclides. S. Cohen & Associates, Vienna, Virginia. December 10, 2010. 

SC&A 2010e. Comparison of ORAUT-OTIB-0052 Plutonium Data for Construction and NonConstruction Workers and the Implications for Coworker Models at Savannah River Site. S. 

Cohen & Associates, Vienna, Virginia, April 2010. 

SC&A 2010f. Joyce Lipsztein and Harry Chmelynski, Draft Review of ORAUT-RPRT-0044: 

Analysis of Bioassay data with A Significant Fraction of Less-Than Results, S. Cohen & 

Associates, Vienna, Virginia. November 2010 

SC&A 2011a. Joyce Lipsztein, SC&A Review of the NIOSH Addendum to the Savannah River 

Site Special Exposure Cohort (SEC-00103) Evaluation Report. S. Cohen & Associates, Vienna, 

Virginia. January, 2011. 

SC&A 2011b. Arjun Makhijani, Incident Records at Savannah River Site: Discussion of the 

Special Exposure Cohort Issue Number 12 Related to Incidents. S. Cohen & Associates, Vienna, 

Virginia. January, 2011. 

SC&A 2011c. Arjun Makhijani, memorandum to Savannah River Site Work Group (Chair – 

Mark Griffon), Subject: Matrix Issues 22 and 23 regarding Petitioner External Dose Issues, S. 

Cohen & Associates, Vienna, Virginia. January 20, 2011 

SC&A 2011d. Lynn Ayers and Kathryn Roberston-DeMers, “Review of the Worker Comments 

for the May 22, 2008, Savannah River Site (SRS) Worker Outreach Meeting and Petitioner 

Supporting Material,” S. Cohen & Associates, Vienna, Virginia. February 2011. 

SC&A 2011e. Lynn Ayers, Review of Some SRS Claimant Cases to Examine Badge and Area 

Codes for Adequacy in Thorium SEC Implementation, S. Cohen & Associates, Vienna, Virginia. 

November 2011. 

Savannah River Site Issues Matrix 18 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release. 
 

 

 

 

 

 

SC&A 2013a. SC&A Review of Addendum 3 to the NIOSH Savannah River Site Special 

Exposure Cohort (SEC-00103) Evaluation Report. S. Cohen & Associates, Vienna, Virginia. 

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SC&A 2013b. Review of the Methods for Estimating Neptunium-237 Intakes at the Savannah 

River Site for the Period 1972-2007. S. Cohen & Associates, Vienna, Virginia. September 

2013. 

SC&A 2014. Draft Review of Proposed One Person-One Sample (OPOS) Approach to 

Coworker Modeling, SCA-SEC-PR2014-0053, Rev. 1. SC&A, Vienna, Virginia. February 21, 

2014. 

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River Site – Part 2. ORAUT-RPRT-0050, Rev. 00, Oak Ridge Associated Universities Team, 

Cincinnati, Ohio. November 14, 2011. 

Savannah River Site Issues Matrix 19 SC&A – Updated February 22, 2014 

NOTICE: This February 22, 2014, version of the SRS SEC Issues Matrix has been reviewed and cleared for potential information 

protected by Privacy Act 5 USC §552a. Future versions of this matrix will require additional review prior to public release.