ML20057B696
| ML20057B696 | |
| Person / Time | |
|---|---|
| Issue date: | 08/31/1993 |
| From: | Fields J NRC OFFICE OF ADMINISTRATION (ADM) |
| To: | Colina I SCIENCE & ENGINEERING ASSOCIATES, INC. |
| References | |
| CON-FIN-L-1854, CON-NRC-04-91-071, CON-NRC-4-91-71 NUDOCS 9309230149 | |
| Download: ML20057B696 (7) | |
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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 2055! @ 001 j'
AUG 311993 Science & Engineering Associates, Inc.
ATTN: Ms. Ilene Colina SEA Plaza 6100 Uptown Boulevard, N.E.
Albuquerque, New Mexico 87110
Dear Ms. Colina:
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SUBJECT:
TASK ORDER N0. 06, ENTITLED " TECHNICAL ASSISTANCE FOR ESTIMATING THE POTENTIAL FOR LOSS OF LOW PRESSURE C00LENTINJECTION(LPCI)CAPABILITYINBWRsDUETOLOCA GENTERATED DEBRIS BLOCKAGE" UNDER CONTRACT NO.
NRC-04-91-071 In accordance with Section G.5(c) of the subject contract, entitled " Task Order Awarci," this letter definitizes the subject task order.
This effort shall be performed in accordance with the enclosed Statement of Work, and the Contractor's technical proposal dated August 5, 1993 with revision dated August 24, 1993.
Task Order No. 06 shall be in effect from August 31, 1993 through May 30, 1994, with a cost ceiling of $217,993.00.
The amount of $200,915.00 represents the total estimated reimbursable costs and the amount of $17,078.00 represents the fixed fee.
The obligated amount of this task order is $194,000.00.
The accounting data for the subject task order is as follows:
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B&R No.:
36019202400 Job Code No.:
L1854 Appropriation No.:
31X0200.360 B0C No.:
2542 Obligated Amount:
$194,000.00 RES Unique Identifier:
RES-C93-127 The following individuals are considered to be essential to. the successful performance of the work hereunder: Mr. Frank Sciacca, Mr. Bob Walsh, Mr. Gilbert Zigler and Dr. D.V. Rao.
The Contractor agrees that such personnel shall not be' removed from the effort under the task order without compliance with Contract Clause H.1, Key Personnel.
9309230149 930831
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. Contract No. NRC-04-91-071 Task Order No. 06 Your contacts during the course of this task order are:
Technical Matters:
Mr. Aleck Serkiz Project Officer (301) 492-3942 Contractual Matters:
Jeanne Cucura Contract Administrator (301) 492-8296 The issuance of this task order does not amend any terms or conditions of the subject contract.
Please indicate your acceptance of this task order by having an official, authorized to bind your organization, execute three (3) copies of this document in the space provided and return two (2) copies to the U.S. Nuclear Regulatory Commission, ATTN: Jeanne Cucura, Division of Contracts and Property Management, P-902,ADM/DCPM/ CAB 3, Washington,D.C. 20555. You should retain the third copy for your records.
Sincerely, 1 yce A. Fields, Contracting Officer Contract Administration Branch No. 3 Division of Contracts and Property Management Office of Administration
Enclosure:
As stated ACCEPTED:
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TASK DESCRIPTION f
for BIB Task Order Contract with SEA Task Order No. 6, Technical Assistance for
,Estimating the Potential for Loss of Low Pressure Coolant Injection (LPCI) Capability in BWRs due to LOCA Generated Debris Blockage
Background:
Loss of post-LOCA recirculation capability due to i
debris generation was evaluated in the resolution i
of USI A-43, " Containment Emergency Sump Performance". The technical effort was focused primarily on PWRs and the conclusion was that backfit action could not be justified from a value-impact perspective (see NUREG-0869, Rev.1, Oct. 1985).
In July 1992 the Barsebaeck-2 BWR plant in Sweden experienced loss of RHR (LPCI trains of ECCS) recirculation capability as a result of debris blockage of the RHR intake strainers and more recently the Perry plant (a US BWR site) experienced loss of RHR recirculation capability due to blockage of the intake strainers. These events have raised design adequacy questions related to US BWRs.
Objectives:
The objectives of Task 6 are to: a) estimate the probability of loss of LPCI/RHR in a reference BWR (which will be selected by NRR staff) using analysis methods similar to those used to analyze a PWR in NUREG-0879, Rev. 1, b) develop a model for the evaluation of BWRs and c) investigate the potential effects of corrosion products and other types of debris which can be'found in BWR suppression pools.
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Work Scope:
s Subtask 6.1 Analyze a " reference" BWR for purposes of estimating the probability of loss of LPCI Injection /RHR recirculation capability utilizing the methodology outlined in NUREG/CR-2791, NUREG/CR-3394, Vols. 1 & 2, and summarize these findings in a manner similar to Apendices D and E of NUREG-0869, Rev. 1. The plant selection will be made in consultation with NRC. A site visit to-the selcted plant or A&E design firm may be needed to l
Task 6 Wor}mcope 6-24-93
2 obtain "as constructed" piping and plant layout information.
Thes
.tnalyses are to be of a generic nature and wil?. encompass the spectrum of pipe breaks used in the above references. The analysis will parametrically investigate LPCI flow rates of 5,000 to 15,000 gpm, break size and location, and nearby insulation which can be targeted by the break jet for a L/D range of 3-7. The blocked strainer head loss will be calculated assuming low-density and high density fibrous insulations (see NUREG/CR-2982, Rev.1). The analysis will also utilize debris blockage information obtained by Swedish licensing authorities which will be provided by the NRC.
Level of Effort:
600 person-hrs (Est'd)
Subtask 6.2 Develop models and perform analyses which incorporate the potential effects of: a) transport of LOCA generated debris following a LOCA, b) debris deposition on suction strainers as a function of time,' c) estimated strainer pressure drop as a function of transported and deposited debris, and d) corrective fixes or actions which
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would enhance safety and the estimated backfit impact.
This task should generally follow the analysis y
guidelines in Regulatory G2ide 1.82, Rev.
1.
However, if model developstnt identifies computational approaches which warrant revising RG 1.82, Rev. 1, such findings should be brought to NRC's attention and draft, revisions submitted.
This task should make use of hydraulic modelling expertise of the nature and level utilized in resolving USI A-43.
Level of Effort:
300 person-hrs Ost'd)
Subtask 6.3 The contractor will utilize the results from Subtasks 6.1 and 6.2 to estimate changes in core damage frequency (CDF) due to LOCA generated debris, estimate the costs for implementing plant c
actions which might be used for resolving perceived safety concerns and calculate cost / benefit ratios which can be used in preparing a regulatory. analysis (RA).
6-24-93 Task 6 Workscope
3 The contractor will prepare input for a draft regulatory analysis (RA) which conforms to
" Regulatory Analysis Guidelines of the U.S.
Nuclear Regulatory Commission," NUREG/BR-0058 (or the most recent update). The RA will utilize (to the extent practical) the guidance and methodology provided in the " Regulatory Analysis Technical Evaluation Handbook,".
Level of Effort:
200 Person-Hrs (Est'd)
Subtask 6.4 Evaluate the effects of potential long-term corrosion product and other foreign materials on RHR suction strainers with and without an agglomeration of fibers on the surface of the strainers.
This task should consider materials that could accumulate in the suppression pool, as well as materials that accumulate in the drywell and the primary containment which will be flushed to the suppression pool during a LOCA.
The task should consider the progressive filtering of finer particles by agglomerated fibers on the surface'of the strainers and'the effect of filtering on the pressure drop across the strainer.
This subtask will not commence until the results of Subtask 6.3 are known. In addition, prior to commencing this task the contrator(s) will meet
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with NRC staff to identify specifics of corrosion products to be evaluated.
Level of Effort:
300 person-hrs (Est'd)
Subtask 6.5 Provide technical assistance as required during
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the internal NRC review process (e.g. CRGR, ACRS, and EDO).
8 Level of Effort:
140 Person,-hrs (Est'd)
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Deliverables and Reportina Letter and/or FAX reports describing key results obtained as work progresses.
Drafts of technical findings for Subtasks 6.1 and 6.2 are due 3 months following work authorization. It is recognized that final calculated results may be pending and those sections should be noted accordingly. A completed draft final report for NRC review Task 6 Workscope 6-24-93
4 for these subtasks will be submitted 1 month later.
A draft technical findings report for Subtask 6.3 is due 1 month following submittal of the draft reports for Subtasks 6.1 and 6.2. A draft final report for Subtask 6.3 for NRC review will be submitted 1 month late.
Monthly reports will be submitted by mid-month for the prior month. These monthly reports will summarize progress to-date, results obtained and provide expenditure summaries and forecast expenditures for future months.
Travel The contract estimate includes allowance for 6 trips to NRC Headquarters in Rockville, Maryland and 4 trips to reactor or other sites.
Estimated Contract Term i
August 31, 1993 through May 30, 1994
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Task 6 Workscope 6-24-93