NUREG/CR-5088, Discusses Proposed Actions Re SECY-89-170, Fire Risk Scoping Study:Summary of Results & Proposed Staff Actions, (NUREG/CR-5088).Need for Addl Research Will Be Considered Following Final Definition of fire-related Parts
| ML20236E620 | |
| Person / Time | |
|---|---|
| Issue date: | 07/18/1989 |
| From: | Remick F Advisory Committee on Reactor Safeguards |
| To: | Carr K NRC COMMISSION (OCM) |
| References | |
| RTR-NUREG-CR-5088 ACRS-R-1367, NUDOCS 8907200380 | |
| Download: ML20236E620 (2) | |
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Murley, NRR July 18,1989 Bernero, NMSS' Jordan, AE0D 4
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The Honorable Kenneth M. Carr..
Chairman-U.S.! Nuclear Regulatory Comission Washington,.D.C. 20555
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Dear Chairman.Carr:
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SUBJECT:
PROPOSED STAFF ACTIONS REGARDING THE FIRE RISK SCOPING STUDY
, (NUREG/CR-5088)'
- During thei351st. meeting of the Advisory Comittee on Reactor Safeguards, July 1.13-14.31989,iwe discussed with representatives of the NRC staff the' proposed actions / delineated :in SECY-89-170, " Fire Risk Scoping Study:
Sumary lof Results and Proposed Staff Actions,".for dealing ;with various
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' recommendations' resulting from the _ Fire Risk Scoping Study. 'Our Subcommittee on Aux 111ary and Secondary Systems met on July 12,1989 with members' of the NRC staff and the Sandia National. Laboratories to discuss' this matter.
We also had the benefit of the documents referenced.
'.One of the significant findings of the. scoping study is that fire PRAs do not normally' address fire vulnerabilities in several important areas, including):
-(a) : fire-induced alternate shutdown / control. room. panel interactions. (b-
. smoke: control and manual fire-fighting effectiveness, (c) adequacy of' fire barriers, and -(d) seismic / fire interactions.
The staff agrees with this i
finding 'and is' currently considering including an effort in ' the Individual Plant' Examination ' for External Events (IPEEE) program to search for such
- vulnerabilities. Also, we _ understand that the staff's External Events Fire Subcommittee 'is developing 1 appropriate' guidance for _ dealing with these
' issues.. We consider these actions reasonable.
In SECY-89-170, the staff has concluded that no new fire-protection research is' needed at. this time.
The need for additional research will be recon-sidered following final ' definition of the fire-related parts of the IPEEE S3 program' later. in 1989, 'the peer review of NUREG-1150 fire analyses, and further discussions with the Committee.
We plan to comment on the need-for further research ' in the fire-protection area after receipt of the IPEEE
'l guidance document for examination of fire-related effects.
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!The Honorable Kenneth M. Carr
. July 18,1989 3,
Additional remarks by' ACRS members William Kerr and Charles J. Wylie ere presented below.
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Sincerely.
i Forrest J. Remick Chairman
' Additional Remarks by ACRS Members William Kerr and Charles J. Wylie
. e recommend. that the staff require the use of annored electrical cable in W' advanced light-water reactors. There are more than 20 years of U.S. electric utility experience which demonstrates its advantages in both. nuclear and fossil electric. generating plants...There.is extensive experience with
_ amored cable in naval and maritime vessels and in chemical plants..The-
_ British are re' quiring its-use in the Sizewell B plant.
The armor makes it significantly more difficult for external heat sources to
. kindle and to propagate. fires within the cables.
It is practically impossi-ble to kindle and propagate a fire from internal short circuits and over-
. Armor provides a high degree of mechanical protection for the cable.
loads.
It' also.provides shielding against exterr.a1 electromagnetic fields.
This feature becomes more important as the application of solid-state components in power plants increases.
It is particularly important'in providing protec-tion against electromagnetic pulses generated by lightning.
References' SECY-89-170, dated June 7,1989, " Fire Risk Scopin Summary of Results and Proposed Staff Actions" (Predecisional) g Study:
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U.S. Nuclear Regulatory Commission NUREG/CR-5088, " Fire Risk Scoping Study:
Investigation of Nuclear Power Plant Fire Risk. Including Previously Unaddressed Issues," Sandia National Laboratories, January 1989 3..
Memorandum, dated December 28, 1988, from Frank P. Gillespie, NRR, for Eric S. Beckjord, RES,
Subject:
" Fire Risk Scoping Study:
Summary of G
Results and Proposed Research Action" I
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