ML20205J718
| ML20205J718 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 09/21/1984 |
| From: | Khatibrhabar, Pratt T BROOKHAVEN NATIONAL LABORATORY |
| To: | Lyon W Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20205J677 | List: |
| References | |
| CON-FIN-A-3778, FOIA-87-7 NUDOCS 8704010396 | |
| Download: ML20205J718 (10) | |
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N_CcpM ye f US. NUCLEAR LEGULATORY COMMISSION LATE La Phoeos0L l
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PROJEbT AND BUDGET PROPOSAL FOR NRC WORK S^ptemb7r 21, 1984 wN, l
O atvisioN No.
mster viv'La FiNNvusER l
Review of the PRA for the Seabrook Nuclear Power Plant I
A-3776 NRC e&R NUMBER NRC CFFICE Nuclear Reactor Regulation 20-19-40-41-3 con coa.?R Actor Associated Universities, Inc.
$N',MC' o" ' CCC WT Brookhaven National laboratorv 04174 y
SITE dot e&R NUMBER Upton, New York 11973 COGNIZANT PER$oNNEL ORC ANIZATION FTS PHONE NUMaER tt.RicoOF PE R F ORMA NCE NRC PROJECT M AN AGER STARTING DATE W. C. 1. von nec/ngs 492-940s 08/01/84
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L,THE;4 NRC TECHNICAL STAFF COMPLETaoN oATE -
06/30/85 FIX
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STAFF YEARS oF EFFORT (Aound so neerett tenta ofa yese)
FY 1984 FY 1983 FY FY iFY oer:a $ceentHac/Technicat 0.2 0.5 Oiher o.h (G,.e.di 0
0.1 TOTAL olRECT STAFF YE ARS 0.2 0.6 CoSTPRoPoSAL c..ects.w e to 37 Mistiett and Serviers (E scludir's AoP) 0 1
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PROJECT AND BUDGET PROPOSAL FOR NRC WORK o.T a Sectember 21. 19 %
P RoJ Ecl 1416L Review of the PRA for the Seabrook Nuclear Power Plant we encrosino omoswiz Avion Associated Universities, Inc.
Brookhaven National Laboratory Scheowied to Start - 6
- 's - Compietee (3hown an Quater } esr/
FORECAST MILESTONE CHART:
PROVIDE ESTIM ATED DOLLAR COST FOR E ACH T ASK FOR E ACH FISCAL YE AR Fv 1985 (Fv Fv
- Fv Fv-1964 TASK in l2ne l 3re l4th in l 2ne l3re l 4th in l2nel 3rdl 4th in l 2ndl 3re l4th l 1n l 2ne l 3re l de SCHE DULE b
f Task 1' cog 7 f8K 66K j
SCHEDULE COST SCH E DUL,E COST SCH E DULE COST
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SCHEDULE COST TOTAL ESTlMATED PROJECT COST 18K 66K thovoce norre tore eescretoons et the fattemng toercs on she eraerInsred. Arman en poorn pacer to anos NMC form Iss.11 en o PROJECT OESCRIPTl0N:
not opptoenble, so sete.l 1, OBJECTIVE OF PROPOSEDWORK
- 2.
SUMMARY
OF PRIOR EFFORTS
- 3. WORK TO BE PERFORME0 AND EXPECTED RESULTS
- 4. DESCRIPTION CF ANY FOLLOWCN EFFORTS S. RELATIONSHIP TO OTHER PROJECTS
- 6. AEPORTING SCHEDULE
- 7. SUSCCNTR &CTCR i'.F Cou ATION
- 8. LIST NEW CAPITAL E0uiPMENT REQUIRED
- 9. DESCRIBE SPECIAL F ACILiffES REQUIRED
- 10. CONFLICT OF INTEREST INFORM ATION SEE p RC MANUAL CHAPTER 1102 POR ADDITION AL IN80RMATION lDATE f.PP Roy ab AuT MOmiT Y =5loN ATuRE 7/2W4
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Review of the Probabilistic Risk Assessment for the i
Project
Title:
Seabrook Nuclear Power Plant
- p. 3 i'
PROJECT DESCRIPTION 1.
OBJECTIVE OF PROPOSED WORK a.
Background
The Reactor Systems Branch (RSB) has the responsibility to assist the Reliability j
and Risk Assessment Branch (RRAB) within the Of fice of Nuclear Reat;gr Regulation (NRR) in the review of Probabilistic Risk Assessments (PRAs) submitted to the NRC by license applicants and licansees.
A PRA has been submitted to NRC by the Public j
Service Company of New Rampshire, an operating license applicant, pertaining to the Seabrook Nuclear Power Plant.
i b.
Objectives 1-The objective of this project will be to provide a limited review of those aspects of the Seabrook PRA leading to estimates of risk corresponding to various plant da -
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age states to determine the accuracy of the estimates. The investigation will be directed toward differences between phenomenological behavior of the Seabrook plant l
and other large dry containment plants such as Zion and Indian Point.
In addition, unique features of the Seabrook PRA will be audited.
t i
2.
SUMMARY
OF PRIOR EFFORTS l
l-
" Not Applicable.
1 j
3.
WORK TO BE PERFORMED AND EXPECTED RESULTS l
1 a.
Work Requirements i
BNL staff will perform a limited review and evaluation of the risk assessment sub-sitted by the licensee for the Seabrook PWR power plant to determine if estimates of
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risk reflect appropriate use of risk assessment methods and plant / site information.
4 BNL will compara the Seabrook containment and other severe accident mitigation fea-l tures to those at Zion and Indian Point.
Since the review is to be limited, maximum t
utilization will be made of results from evaluation of other large dry containment j
plant PRAs, and emphasis will be placed on differences between those plant PRAs and the Seabrook PRA.
i The defensibility of the licensee's submittal of the risk and associated uncertainty spread with respect to (1) use of state-of-the-art assessment methods, (2) thorough-ness and comprehensiveness of analysis, (3) availability and appropriate use of
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data, and (4) realism of modeling assumptions, will be considered.
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The review will focus on the calculation of risk (based upon a staff supplied site
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consequence model) given the frequencies of the plant damage states, including j
methodology, assumptions, data, information sources, models, plant understanding, j
completeness of the analysis, and any other area which could affect the quantitative 1
4 1
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(See Continuation Sheet) t
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Review of the Probabilistic Risk Assessment for the P*oject
Title:
Seabrook Nuclear Power Plant r
- p. 4 3.
WORK TO BE PERFORMED AND EXPECTED RESULTS (Cont.)
or qualitative results.
A limited sensitivity analysis will take alternatives iden-i tified in the review in appropriate combinations and determine the incremental change in risk resulting from the use of alternatives in the dominant sequences.
In general, these alternatives will be evaluated by performing separate effects / phenom-enological calculations within the overall analysis.
The work to be performed in this project will be based in part upon'Une "frcat-en'd" work to be performed by the Lawrence Livermore National Laboratory under NRR/ DST funding (FIN No. A-3754-4), an'd will be fully coordinated *with that effort.
The work described herein consists of one task which is divided into several parts to be consistent with the A-3754-4 effort. These are:
i 1.
Evaluation of Containment Failure Modes and Radiological Source Terms i
for Internal Events 2.
Evaluation of Containment Failure Modes and Radiological Source Terms for External Events 3.
Draft Final Reports 4.
Final Reports 5.
Questions to Licensee Each it'em is discussed below.
1 y
Task I - Perform "Back-End" Evaluation of the Seabrook PRA Estimated Level of Effort:
FY84 0.15 staff years FY85 0.55 staff years Estimated Completion Date:
August 30, 1985 i
The following items are to be accomplished to complete the contract task:
Subtask I.1 - Evaluation of containment Failure Modes and Radiological Source Terms f or Internal Events l
(a)
BNL will perform a limited review and evaluation of the I
l scope, assumptions, and systems analysis aspects of the PRA due to internal event plant damage states and other items identified as a result of the initiating events review and provided to BNL by the NRC Program Manager.
(b)
BNL will compare such items as methodology, assumptions, data, information sources, models, plant understanding, completeness of the analysis, and other areas which could af fect the results.
- BNL will provide a compila-tion of significant similarities and differences.
t (See Continuation Sheet)
I
Review of the Probabilistic Risk Assessment for the Project
Title:
Seabrook Nuclear Power Plant
- p. 5 3.
WORK TO BE PERFORMED AND EXPECTED RESULTS (Cont.)'
(c)
BNL will develop a table of assumptions used in the li-censee's analysis.and evaluate the validity.
(d)
BNL will identify omissions and deficiencies in the-l phenomenological analysis and estimate the impact where reasonable, considering the scope and depth of the. Task effort. BNL will also include the techhical basis for these estimates.
(e)
BNL will incorporate NRR tec nical review comments as provided by the NRC Program Manager.
(f)
BNL will perform a limited assessment of the uncertainty l
analysis and consider propagation and completeness in the treatment of uncertainty,. data uncertainty, and mod- !
eling sensitivity / uncertainty.
J (g)
BNL staff will maintain close contact with Lawrence Livermore National Laboratory in regard te the front-end i
analyses which serve as the starting point for the above work.
'i Subtask I.2 - Evaluation of Containment Failure Modes and Radiological j
Source Terms for External Events (a)
BNL will perform a limited review of each type of exter-nal event considered and concur with or modify the in-4 formation for each plant damage state which is signifi-j cantly affected by the review.
(b)
BNL will review and evaluate the assumptions of the li-censee's external events analysis.
1 (c)
BNL will identify omissions and deficiencies in the ex-ternal event analysis, and estimate the impact where practical with respect to the effort funded under this task.
- If BNL find omissions and deficiencies for which j
an evaluation is believed to be beyond the state-of-
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the-art, a list of the omissions and the basis for the belief that they are beyond the state-of-the-art will be j j
provided.
t (d)
BNL will assess the uncertainty analysis and examine l
propagation and completeness in treatment of uncer-tainty, data uncertainty, and modeling sensitivity /un-certainty.
1 (See Continuation Sheet)
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7
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s,c[1 5
Review of the Probabilistic Risk Assessment for.the
? N Project
Title:
Seabrook Nuclear Power Plant
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.m 3.
WORK TO BE PERFORMED AND EXPECTED RESULTS (Cont.)
(e)
BNL staff will maintain close contact with Lawrence Livermore Laboratories in regardcro the frant-end analy-i sis which serve as the starting point for. the Subthk
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I.2 work.
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Subtask I.3 - Draft Reports d
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Draf t Reports will be provided in accordance with the sched-m ule described in Subtask I.4.
The -reports,are,te inc16de, at -
a minimum, the following:
4)
(a)
For each of the PRA areas reviewed,'BNL will define the basis for acceptability and describe what was consicerad in the review. The findings will include selected rees-timates of risk infornation corresponding to plant dar.l age states, identification of arets'which were not put-sued, and identification of grey areas where sensit.ivity studies might be used to bound a central estimate. t (b) The BNL review will describe areas of incompleteness in the PRA. BNL will also quantify, where ccasistent with I
the funded depth of the review,.the potential impact of these areas, including a discussion of the basis fbr_
quantification values.
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(c)
Based on BNL reviewer audits, BNL will discuss the accu-racy, uncertainty, and adequacy of the PRA author's risk,v quantifications.
'g (d)
An approximate outline of the reports is given belowl i
s I
D 1.
Summary li i
p' 2.
Introduction
2.1 Background
s'
-[,1 2.,2 Scope
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2.3 Assumptions 3.
Internal Events Containment Failure Modes and [#
s Radiological Source Terms s
g 4.
External Ivents Containment Failure Modes and Radiological Source Terms
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i (See Continuation Sheet) g
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Review of the Probabilistic Risk Assessment for the Proj ect
Title:
Seabrook Nuclear Power Plant
- p. 7 3.
WORK TO BE PERFORMED AND EXPECTED RESULTS (Cont.)'
5.
Summary and Conclusions 5.1 Do=inant Risks Corresponding to Each Plant Damage State 5.2 Important Problems and Omissions 5.3 Treatment of Uncertainties 5.4 overall Evaluation of Seabroog, Risk Assessment 6.
Appendices (as required)
This outline is similar to the outline to be followed by Lawrence Livermore in their accomplishment of FIN A-3754-4.
Although the BNL and Lawrence Livermore raports are to be
' stand-alone" reports, the contents will be coordinated so that complete coverage of the technical topic is provided if one has both the BNL and the Lawrence 'Livermore reports.
Subtask 1.4 - Pinal Reports The final reports will take into account pertinent comments on the draft final reports by NRC and other interested par-ties. They will be published as NUREG/CR reports.
The first final. report will be provided by November 30,1984 (in a pre-liminary form) and the second, which covers the entire pro-gram, is to be provided by August 30, 1985.
subtask I.5 - Questions to Licensee BNL staff will provide questions for forwarding to the 11-censee coverinF all aspects of the analysis on a schedule that is to be mutually agreeable between BNL and the NRC Project Manager.
Level of Effort and Period of Performance The overall level of effort is 0.7 professional staff years with the effort to be completed by August 30, 1985.
b.
Meetings and Travel Various members of the BNL staff will participate in several meetings at NRC head-quarters (six 1-day meetings with the NRC Project Manager in Bethesda are planned) and at other locations to obtain infor=ation for this program. These cay include attendance at hearings, visits to other laboratories or institutions, and participa-tion at professional meetings.
In addition, two 3-day visits to the Seabrook reac-tor site are planned and budgeted.
(See Continuation Sheet)
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l l
Review of the Probabilistic Risk Assessment for the
' Proj ect
Title:
Seabrook Nuclear Power Plant
- p. 8 i
l c.
NRC-Furnished Materials
)
The NRC will provide any documentation relevant to the above tasks including that which is submitted by licensee / applicants during the course of this project. NRC will furnish copies of the latest relevant codes together with appropriate User's Manuals and description of subroutines.
4.
DESCRIPTION OF ANY FOLLOW-ON EFFORTS Not' Applicable.
5.
RELATIONSHIP TO OTHER PROJECTS As discussed in the background to this project, the~ scope of work is similar to, but will not duplicate, work to be accomplished by Bh1 staff under FIN's A-3705 and A-3748. In addition, the extensive review by BNL staff of the Zion and Indian Point Probabilistic Safety St6 dies under FIN A-3712 will provide us'eful background for this project.
I 6.
REPORTING REOVIREMENTS Technical Reports 1
f All technical products which are required from this contract have been identified specifically in the above discussion. BNL shall submit six copies of draf t NUREG/CR
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reports for NRC staff review and approval if required by the NRC Project Manager.
For NUREC/CR reports, within sixty days of receipt of the staff's comments on these reports, BNL shall submit one reproducible and six reproduced copies of the final reports in accordance with NRC Manual Chapter 3202, " Publication of Unclassified Regulatory and Technical Reports Prepared by NRC Contractors."
Business Letter Reports i
A monthly business letter report will be submitted by the 20th of the month to W.
Lyon, NRC Project Manager, with copies provided to the Director, Division of Systems Integration, ATTN:
S. Boyd, R. W. Houston, and C. L FGaioma, NRR. The report will contain three sections as follous:
f4 Qg 4 a.
Proj ect Stat'us Section 1)
A listing of efforts completed during the period, milestones reached, or if missed, an explanation provided.
2)
Any problems or delays encountered or anticipated and recc.:endations for resolution.
(NOTE:
If the recommended resolution involves a con-tract modification, i.e., change in' work requirements, level of ef fort
'(costs), or period of performance, a separate letter will be prepared l
J (See Continuation Sheet)
l Review of the Probabilistic Risk Assessment for the Project
Title:
Seabrook Nuclear Power Plant
- p. 9 6.
REPORTING REOUIREMENTS (Cont.)
and submitted to the Director, Division of Systems Integration, ATTN:
S. Boyd, and a copy provided to the Project Manager and T. L. DiGaloma, NRR.
3)
A summary of progress to date.
(This may be expressed in terms of per-centage completion for each task.)
- 4) A brief summary o,f plans for the next reporting period.
b.
Financial Status Section BNL will provide the total cost (value) of the project as reflected in the proposal (NRC Form 189), the total amount of funds obligated to date, and the balance of, funds required to complete the work by fiscal year as follows:
Total Funds Balance of Funds Projected Obligated by Fiscal Year Project Cost to Date FY-FT-FY-BNL will provide the amount of fundo expended (costed) by category dur-ing the period and total cumulative year-to-date as follows:
Period Cumulative Direct Salaries Indirect Salaries ADP Support Travel Subcontracts Equipment and Materials Overhead Total
(%)*
" Percentage of funds received (year-to-date) against funds obligated, c.
Tee Recovery Cost Status Section Pursuant to the provisions of NRC Regulations,10 CFR 170, BNL will provid the total amount of funds expended (costed) during the period and cumula-
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tive year-to-date for each task, e.g., by facility or report, and report them on a separate page as part of this report in the following format:
(See Continuation Sheet)
W"
b Review of the Probabilistic Risk Assessment for the
_Proj ect
Title:
Seabrook Nuclear Power Plant p. 10 6.
REPORTING REOUIREMENTS (Cont.)
FIN:
TITLE:
PERIOD:
Facility / Report Docket #
ID#
Period
,)nn)
Seabrook 50-443 7.
SUBCONTRACTOR INFORMATION BNL does not intend to subcontract any portion of this work.
In the event a subcon-tract is anticipated, BNL will notify NRC before it is initiated.
8.
NEW CAPITAL EOUIPMENT REQUIRED 1
None.
9.
SPECIAL FACILITIES REOUIRED jNone.
10.
CONFLICT OF INTEREST INFORMATION j
There are neither significant contractual nor organizational relationships of the Department of Energy, BNL and enployees, or expected subcontractors or consultants on this proposal, with industries regulated by the NRC and suppliers thereof that give rise to an apparent or actual conflict of interest.
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