ML17333B107

Confirms That Util Completed Requested Actions of GL 96-01, Testing of Safety Related Logic Circuits. Actions Described in Ltr Provide Reasonable Assurance That Util Testing of safety-related Logic Circuits Adequate

ML17333B107
Person / Time
Site:	Cook
Issue date:	10/28/1997
From:	Fitzpatrick E INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
AEP:NRC:1246A, GL-96-01, GL-96-1, NUDOCS 9710310184
Download: ML17333B107 (5)

Text

CATEGORY 1 REGUDATQO INFORMATION DISTRIBUTION TEM (RIDE)

ACCESSION NBR:9710310184 DOC.DATE: 97/10/28 NOTARIZED: YES DOCKET I FACIL:50-315~Donald C.

Cook Nuclear Power Plant, Unit 1, Indiana M

05000315 54-316 Donald C.

Cook Nuclear Power -Plant, Unit 2, Indiana M

05000316 AUTH.NAME AUTHOR AFFILIATION FITZPATRICK,E.

American Electric Power Co., Inc.

RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Confirms that util completed requested actions of GL 96-01, "Testing of Safety Related Logic Circuits."

DISTRIBUTION CODE:

A067D COPIES RECEIVED:LTR ENCL SIZE:

.TITLE: GL 96-01 Response-Testing of Safety-Related Logic NOTES:

E RECIPIENT ID CODE/NAME NRR INTERNA 'ILE CENTER EXTERNAL: NOAC COPIES LTTR ENCL RECIPIENT ID CODE/NAME HICKMAN,J NRR/DRCH/HICB NRC PDR COPIES LTTR ENCL D'

U E'

NOTE TO ALL MRIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD)

ON EXTENSION 415-2083 TOTAL NUMBER OF COPIES REQUIRED:

LTTR 6

ENCL

' I It NII'

indiana Michigan Power Company 500 Circle Drive Buchanan, Mi 491071395 INQMMA NICNESAN PQMfM October 28, 1997 AEP:NRC:1246A Docket Nos.:

50-315 50-316 U. S. Nuclear Regulatory Commission ATTN:

Document Control Desk Washington, D.

C.

20555 Gentlemen:

Donald C.

Cook Nuclear Plant Units 1 and 2

RESPONSE

TO GENERIC LETTER (GL) "'96-01, TESTING OF SAFETY RELATED LOGIC CIRCUITS The purpose of this letter is to confirm that we have completed the requested actions of generic letter (GL) 96-01.

As discussed in our submittal AEP:NRC:1246, dated April 17,

1996, we have compared electrical elementary drawings for the reactor protection system (RPS),

emergency diesel generator (EDG) load shedding and sequencing, and actuation logic for the engineered safety features actuation systems (ESFAS) against plant surveillance test procedures to provide reasonable'assurance that the logic circuitry, including the parallel logic, interlocks,

bypasses, and inhibit circuits, are adequately covered in the surveillance procedures to fulfill the technical specification (T/S) requirements.

This review included relay contacts, control

switches, and other electrical components utilized in logic circuits performing a safety-function within these systems.

To implement GL 96-01, we used T/S table 3.3-1 as the source of the RPS T/S requirements, T/S section 3/4.8.1 as the source of the EDG load shedding and sequencing requirements, and T/S table 3.3-3 as the source of the ESFAS requirements.

The safety related functions described in these T/Ss were used to establish the "functional" scope of the GL 96-01 review.

The hardware scope

'of GL 96-01 for RPS and ESFAS consists of the initiating bi-stable contacts from the control circuitry, through the solid state protection system, to the contacts that actuate the equipment that accomplishes the required safety functions.

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'he hardware scope of GL 96-01 for the EDG load shedding and sequencing requirements consists of the initiating undervoltage

relays, the master relay that starts the

EDGs, various breakers through the breaker timing and control circuitry (as determined by the initiating event),

to the contacts that actuate the equipment that accomplishes the required safety functions.

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~ U. S. Nuclear Regulatory Commission Page 2

AEP:NRCr1246A The surveillance procedures were reviewed against the electrical elementary drawings containing the logic circuits for safety related functions within the scope of GL 96-01, defined above.

We conclude that the actions described in this letter provide reasonable assurance that our testing of safety-related logic circuits is adequate.

Sincerely,

, E.. H. Fitzpatrick

-Vice President SWORN TO AND SUBSCRIBED BEFORE ME

/.;THYD~P DAY OF~f 1997 (7 I Notary Public vlb cc:

A. A. Blind A. B. Beach MDEQ -

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& RPD NRC Resident Inspector J.

R. Padgett UNDAL BOElCKE Notary Public, Berrion County, MI hhy Commission Expires January 2 1 200 t