ML20148H585

Forwards RAI Re Emergency Core Cooling Sys Venting to Plants,Unit 2,per 970605 Telcon

ML20148H585
Person / Time
Site:	Byron, Braidwood
Issue date:	06/06/1997
From:	Dick G NRC (Affiliation Not Assigned)
To:	Johnson I COMMONWEALTH EDISON CO.
References
TAC-M98780, TAC-M98782, NUDOCS 9706100366
Download: ML20148H585 (4)

Text

June 6, 1997 Ms. Irene M. Johnson. Acting. Manager Nuclear Regulatory Services Commonwealth Edison Company Executive Towers West III I

1400 Opus Place Suite 500 Downers Grove, IL 60515

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING EMERGENCY CORE COOLING SYSTEM VENTING - BPAIDWOOD STATION. UNIT 2 AND BYRON STATION, UNIT 2 (TAC NOS. M98780 AND M98782)

Dear Ms. Johnson:

On May 24, 1997. Commonwealth Edison Com)any (Comed) submitted a request for an exigent license amendment regarding tie emergency core cooling system venting for Braidwood. Unit 2 and Byron. Unit 2. During the course of our review, we havr identified the need for further information as documented in the enclosed request for additional information (RAI). The questions were discussed. in part, with.the Comed staff during our telephone conference call on June.5. 1997. Please provide your response to the request so that we may continue.our review of your submittal.

Sincerely.

Original signed by Ramin R. Assa for:

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George F. Dick, Jr., Project Manager .

Project Directorate III-2 1 Division of Reac. tor Projects - III/IV Office of Nuclear Reactor Regulation Docket Nos. STN 50-457, STN 50-455

Enclosure:

RAI l

cc w/ encl: see next page i DFO ( ' i l Distribution:  ;

% Docket 4 File.JTSC3: PUBLIC PDIII-2 r/f-J. Roe,lJWR E. Adensam EGA1 R. Capra C. Moore (2) G. Dick (3)~ R. Assa l S. Bailey C. Jackson.- 08E23- M. Shuaibi, 08E23

! '0GC. 015818 ACRS, T2E26 , R. Lanksbury. RIII l 9706100366 970606 i PDR ADOCK 05000455 a 4 e eOa e. NHC'M[ E CR,TER CDPV DOCUMENT'NAME: BB98780.RAI N l

. To receive a copy of this document, indicate in the box: , 4

) "C" = Copy without enclosures, "E" = Copy wit [hpolosures "N" = No copy l

OFFICE PM:PD} l-2, l e.

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L6:6EU-2 l L D:PDill-2 lF l NAME- GDICK / M/l m Ch100RE j RCAPRA w

i. DATE 06/ G / 97 ' ' 06/Lt/97 06/d /9/  ;

I 0FFICIAL RECORD COPY ,

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t I. Johnson Byron /Braidwood Power Stations Commonwealth Edison Company cc:

Mr. William P. Poirier, Director George'L. Edgar Westinghouse Electric Corporation Morgan, Lewis and Bochius Energy Systems Business Unit 1800 M Street, N.W.

Post Office Box 355, Bay 236 West Washington, DC 20036 Pittsburgh, Pennsylvania 15230 Attorney General

! Joseph Gallo 500 South Second Street Gallo & Ross Springfield, Illinois 62701 1250 Eye St., N.W.

' Suite 302 EIS Review Coordinator ,

Washington, DC 20005 U.S. Environmental Protection Agency i 77 W. Jackson Blvd. l l Michael I. Miller, Esquire Chicago, Illinois 60604-3590 l Sidley and Austin One First National Plaza Illinois Department of Chicago, Illinois 60603 Nuclear Safety  !

l Office of Nuclear Facility Safety i Howard A. Learner 1035 Outer Park Drive l Environmental law and Policy Springfield, Illinois 62704 I Center of the Midwest i 203 North LaSalle Street Commonwealth Edison Company  !

Suite 1390 Byron Station Manager i l Chicago, Illinois 60601 4450 North German Church Road l l Byron, Illinois 61010 )

U.S. Nuclear Regulatory Commission j Byron Resident Inspectors Office Kenneth Graesser, Site Vice President  ;

4448 North German Church Road Byron Station -l Byron, Illinois 61010-9750 Commonwealth Edison Station '

4450 N. German Church Road Regional Administrator, Region III Byron, Illinois 61010 U.S; Nuclear Regulatory Commission 801 Warrenville Road U.S. Nuclear Regulatory Commission Lisle, Illinois. 60532-4351 Braidwood Resident Inspectors Office Rural Route #1, Box 79 Ms. Lorraine Creek Bracev111e, Illinois 60407  ;

Rt. 1, Box 182 4 Manteno, Illinois 60950 Mr. Ron Stephens Illinois Emergency Services Chairman, Ogle County Board and Disaster Agency Post Office Box 357 110 East Adams Street Oregon, Illinois 61061 Springfield, Illinois 62706 Mrs.'Phillip B. Johnson Chairman t

, 1907 Stratford Lane Will County Board of Supervisors Rockford, Illinois 61107 Will County Board Courthouse Joliet, Illinois 60434

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1 Commonwealth Edison Company Braidwood Station Manager Rt. 1, Box 84-

! Braceville, Illinois 60407 Ms. Bridget Little Rorem Appleseed Coordinator 117 North Linden Street ,

Essex, Illinois 60935 l

l Document Control Desk-Licensing Commonwealth Edison Company 1400 Opus Place,- Suite 400 Downers Grove, Illinois 60515 l Mr. H. G. Stanley Site Vice President Braidwood Station Commonwealth Edison Company RR 1, Box 84 l Braceville, IL 60407 l'

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REQUEST FOR ADDITIONAL INFORMATION EMERGENCY CORE COOLING SYSTEM VENTING COMMONWEALTH EDIS0N COMPANY

! BRAIDWOOD STATION. UNIT 2: BYRON STATION. UNIT 2 l DOCKET NOS. STN 50-457 AND STN 50-455 l

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1. Comed is requested to identify any relative high points in the normal and emergency piping for the centrifugal charging (CV) discharge piping that it does not intend to vent or test with ultrasonic testing to support the technical specification request, and describe why testing or venting is not necessary. Please include the possible effects of a water hammer event and the consequences if there is )iping damage. In preparing the ,

answer, please include a discussion of low the issues contained in >

Information Notice 92-61, " Loss of High Head Safety Injection," affect any conclusions.

l 2. The proposed technical specification bases state that system pressure is sufficient to provide confidence that water hammer is not a concern.

This is not consistent with the surveillance requirement which includes surveillances on pressurized piping. Please provide additional .

justification why. voids in pressurized piping do not cause water hammer. l or revise the statement accordingly. 1

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ENCLOSURE 1