ML20203H545

Forwards Interfacing Sys LOCA at Bwrs,Tasks 1A & 2A, Draft BNL Rept.Rept Based on Info Contained in Fsar,License & Tech Specs & P&Ids & Will Be Used in Resolving Generic Issue 105, Intersystem LOCAs in Bwrs

ML20203H545
Person / Time
Site:	Quad Cities
Issue date:	07/18/1986
From:	Zwolinski J Office of Nuclear Reactor Regulation
To:	Farrar D COMMONWEALTH EDISON CO.
Shared Package
ML20203H548	List: ML20203H545
References
NUDOCS 8608050018
Download: ML20203H545 (3)

Text

m July 18,1986 Docket No. 50 254/265 DISTRIBUTION w/ attachment

. Docket File 1 NRG PDR Mr. Dennis L. Farrar local PDR RBevan Director of Nuclear Licensing DISTRIBUTION w/o attachment Commonwealth Edison Company BWD#1 Rdg BGrimes Post Office Box 767 RBernero Jpartlow Chicago, Illinois 60690 OGC (Info onlyi NThompson EJordan CJamerson

Dear Mr. Farrar:

JZwolinski ACRS (101 RWoods QC File

SUBJECT:

COMMENTS ON DRAFT LETTER REPORT FOR PRA ON INTERSYSTEM LOSS-0F-COOLANT ACCIDENTS Re:

Quad Cities Nuclear Generating Station Units 1 and 2 The attached is a draft report compiled by Brookhaven National Laboratory (BNL), under contract to the NRC, for use in performing a probabilistic risk assessment (PRA) for intersystem loss-of-coolant accidents (LOCAs). This information is to be used in the resolution of Generic Issue No. 105, "Intersystem LOCAs in BWRs." The study is to identify possible interface between high and low pressure systems, possible failure modes and frequencies, and likely consequences of the postulated LOCAs. This draft report has been developed for nuclear units at three stations: Nine Mile Point Unit 2, Peach Bottom Units 2 and 3, and Quad Cities Units 1 and 2.

It is based on information contained in the FSAR, the license and technical specifications for each unit, piping and instrument diagrams, and similarly available sources.

We would appreciate your review of the material concerning the Quad Cities Units 1 and 2.

Your comments regarding its accuracy and completeness would be helpful in assuring that our continuing efforts in completing our study would j

be based on correct information.

Any questions regarding your participation should be directed to the NRC pro.iect manager. We appreciate your cooperation in this effort.

Sincerely, John A. Zwolinski, Director i

BWR Directorate #1 l

Division of BWR Licensing

Attachment:

Draft PRA Report cc w/ attachment: See next page 8608050018 86071s PDR ADOCK 05000254 P

PDR OFG : DBL:RWD1

DBL:RWD1

DBL:RWD1

.l_ --_______ _: ___________:-__________ :____________:____________:...._______

, _ _ _ _ _ : _ _ _ _ _ _ _ _ _O :

NAME :CJamerson RBevan

J7wolinski DATE :07/19;/86

07/p/86

07/0/86 0FFICIAL RECORD COPY 1

)

o,,

UNITED STATES 8

NUCLEAR REGULATORY COMMISSION a

E WASMNGTON, D. C. 20555 Docket No. 50-254/265 Mr. Dennis L. Farrar Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690

SUBJECT:

COMMENTS ON DRAFT LETTER REPORT FOR PRA ON INTERSYSTEM LOSS-OF-COOLANT ACCIDENTS Re:

Quad Cities Nuclear Generating Station Units I and 2 The attached is a draft report compiled by Brookhaven National Laboratory (RNL), under contract to the NRC, for use in performino a probabilistic risk assessment (PRA) for intersystem loss-of-coolant accidents (LOCAs1. This information is to be used in the resolution of Generic Issue No. 105, "Intersystem LOCAs in RWRs." The study is to identify possible interface between high and low pressure systems, possible failure modes and frequencies, and likely consecuences of the postulated LOCAs. This draft report has been develooed for nuclear units at three stations:

Nine Mile Point Unit 2, Peach Bottom Units 2 and 3, and Quad Cities Units 1 and 2.

It is based on information contained in the FSAR, the license and technical specifications for each unit, piping and instrument diagrams, and similarly available sources.

We would appreciate your review of the material concerning the~ Quad Cities Units 1 and 2.

Your comments regarding its accuracy and completeness would be helpful in assuring that our continuing efforts in completinq our study would be based on correct information.

Any questions regarding your participation should be directed to the NRC pro,iect manager. We appreciate your cooperation in this effort.

Since ely J

~

Joh A. Zwolinski, Director BWR roiect Directorate #1 Division of BWR Licensing

Attachment:

Draft PRA Report cc w/ attachment:

See next page

1 p

Mr. Dennis L. Farrar Quad Cities Nuclear Power Station Commonwealth Edison Comoany Units 1 and 2 cc:

Mr. B. C. O'Brien President Iowa-Illinois Gas and Electric Company 206 East Second Avenue Davenport, Iowa 52801 Mr. Michael I. Miller Isham, Lincoln & Reale Three First National Plaza Suite 5200 Chicago, Illinois 60602 Mr. Nick Kalivianakis Plant Superintendent Quad Cities Nuclear Power-Station 22710 - 206th Avenue - North Cordova, Illinois 61242 Resident Inspector

11. S. Nuclear Regulatory Commission 22712 206th Avenue North Cordova, Illinois 6124P Chairman Rock Island County Board of Supervisors Rock Island County Court House Pock Island, Illinois 61901 Mr. Gary N. Wright Nuclear Facility Safety Illinois Department of Nuclear Safety 1035 Outer Park Drive, 5th Floor Springfield, Illinois 62704 Regional Administrator, Region'III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 1

I