ML20093K738

From kanterella
Jump to navigation Jump to search
Forwards Addl Info on Outstanding Issues 68 & 71 of Draft SER Re Seismic Qualification of Indicators on Emergency Shutdown Panel & Support Sys & Protection Sys Interrelationships,Respectively
ML20093K738
Person / Time
Site: Beaver Valley
Issue date: 10/11/1984
From: Woolever E
DUQUESNE LIGHT CO.
To: Knighton G
Office of Nuclear Reactor Regulation
References
2NRC-4-165, NUDOCS 8410180140
Download: ML20093K738 (4)


Text

_ -

I den

'Af

( 12 87 514 (412) 923-1960 i Nuclear Construction Division Telecopy (412) 787-2629 Robinson Plaza, Building 2. Suite 210 Pittsburgh, PA 15205 October 11, 1984 United States Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Mr. George W. Knighton, Chie f Licensing Branch 3 Of fice of Nuclear Reactor Regulation

SUBJECT:

Beaver Valley Power Station - Unit No. 2 Do cke t No . 50-412 Open Item Response Gentlemen:

This le tter forwards res ponses to the issues li s ted below. The following items are attached:

At tachment 1: Additional Information on Outstanding Issue 68 of the Beaver Valley Power Station Unit No. 2 Draf t Safety Evaluation Report Attachment 2: Additional Information on Outstanding Issue 71 of the Beaver Valley Power Station Unit No. 2 Draf t Safety Evaluation Report DUQUESNE LIGHT COMPANY By E .(/J . ~Wooleve r Vice President IULT/wjs Attachments cc: Mr. H. R. Denton, Director NRR (w/a)

Mr. D. Eisenhut, Director Division of Licensing (w/a)

Mr. G. Walton, NRC Resident Inspector (w/a)

Mr. E. A. Licitra, Project Manager (w/a)

Ms. M. Ley, Project Manager (w/a)

SUBSCRIBED AND SWO TO B FORE ME THIS

~

/M DAY OF L , 1984.

AddMMA Notary Public ANITA ELAINE REITER, NOTARY PUDUC G410180140 841011 ROBINSON TOWNSHIP, ALLEGHENY COUNTY hDRADOCK05000 MY COMMISSION EXPlRES OCTOBER 20,1986 Booi

'b

A-

_ ; Unitcd. Stttac Nucler R'Jgulctory Comission Mr. Ge:rg2 W. Knighton, Chief

--Page 2 COMMONWEALTH OF PENNSYLVANIA )

) -SS:

COUNTY OF ALLEGHENY )

On this - '

/ N day of , '/// , before me, a Notary - Public in and for said Commonwealth and County, personally appeared

.E.'J. Woolever, who being duly sworn, deposed and said that (1) he is Vice

. President of Duquesne Light, -(2) he is duly authorized to execute and file the foregoing Submittal on behalf of said Company, and (3) the statements set forth' in the Submittal 'are true and correct to the best of-his knowledge.

. Notary Public ANITA ELAINE REITER, NOTARY FUDUC ROBINSON TOWNSHIP, ALLEGH NY COUNTY MY COMMISSION EXPIRES OCTOBER 20,-1986

=

p-4 . . _ ,

u +:

~ ATTACHMENT 1.

-n.

P ' '

E Ad'd itional Information lon Outstanding Issue' 68 of the

. Beaver. Valley. Poser, Station Unit No. 2 Draf t Safety Evaluation Report; w During -:the June 29,--1984,- meeting with the NRC, the NRC reviewer questioned the seismic l qualification of~ the indicators on the emergency shutdown panel

'(ESP). 'The~following is provided'in response to this question, c

i The ESP! 'isidesigned ' to meet the requirements of GDC '19. The indicators

- on . the ESP ~ are manufactured by the - same vendor and. are. the same model (VX252) :as : those used on the main control board. The' indicators on the main control' board are seismically . qualified. The ESP indicators ,

. however, were not purchased as seismic instruments, as the seismic event is not considered when operation ~ from the ESP is required. Because the

ESP-? instrumentation was not . purchased as seismic instrumentation, no

~

s

documentation' . exists to document its ability to withstand a seismic

.av

.; event. ' However, the similarity between this instrumentation and that .on

' the -' main . control ' board (sane manufacturer and model) implies that the ESP' instrumentation would remain functional through a seismic event.

w 2

4 0

+

3

g: '

ATTACHMENT 2 Additional.Information on Outstanding Issue 71 of the Beaver Valley Power Station Unit No. 2 Draft Safety Evaluation Report

- During the June 29, 1984, meeting with the NRC, Duquesne Light Company (DLC) agreed . to . review the -implementation of Regulatory Guide (R.G.) 1.47 with

' respect to the ' " support system" and .' protect ion system" interrelationships.

~

DLC has reviewed - thir .and unders tands that if a safety system directly

. depends ~on . a support . syrtem, then the safety . system should indicate that it is inoperable any time the support system is inope rable . This should be so indicated even if the support system is separatly indicated. This is the position advocated by the NRC reviewer.

' Therefore, DLC will make the following' changes to the Bypassed and Inoperable

- Systems -Indication (BISI) logic which follow- from this philosophy.

-1. Inoperability of contairunent component cooling water. will cau se residual heat removal to indicate inoperable.

2. Inope: ability of service water will cause component cooling,~ diesel generator, and recirculation spray to indicate inoperable.

_ , - ~ , . - - , , . . . .- ..- # .-.vr m.--. , ,w-- .,,e, --r w