ML17334A844

Advises That Phase a Containment Isolation Signal Would Have to Be Reset to Permit Safe Opening of Four Containment Isolation Valves That Supply Instrument Air to Reactor Coolant Sample Valves During Loca,Per Criterion 3

ML17334A844
Person / Time
Site:	Cook
Issue date:	11/07/1984
From:	Alexich M INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	Harold Denton Office of Nuclear Reactor Regulation
References
AEP:NRC:068K, AEP:NRC:68K, NUDOCS 8411140304
Download: ML17334A844 (3)

Text

ACCE'.SION NUR FAC IL:50 315 50 316 AUTH ~ NAMZE ALEXICHRM ~ PE REC IP ~ NAME DENTONRH ~ RE REGULATORY iNFORMATION DISTRIBUTION SYS FM (RIDS)

8411140304 OUTDATE: 84/11/07 NOTAIZED:

NO DOCKET 0

Oonala CD Cook Nuclear Power PlantR Unit ii Indiana 8

05000315 Donald C.

Cook Nuclear Power P'lant< Unit 2< Indiana lt Od~

AUTHOR AFFILI ATION

'ndiana lt Michigan Electric Co ~

HEC IPIENl'FF ILIATION Office of Nuclear Reactor Regulationi l;irector,

SUBJECT:

Advises that Phase A containment isolation signal would have to be reset to permit safe opening of four containment isolation valves that supply instrument air to reactor coolant sample valves during LOCAEper Criterion 3.

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INDIANA8 MICHIGAN ELECTRIC COMPANY P.O. BOX 16631 COLUMBUS, OHIO 43216 November 7, 1984 AEP: NRC:0678K Donald C.

Cook Nuclear Plant Unit Nos.

1 and 2

Docket Nos.

50-315 and 50-316 License Nos.

DPR-58 and DPR-74 POST ACCIDENT SAMPLING SYSTEM; PROVIDING INSTRUMENT AIR TO REACTOR COOLANT SAMPLE VALVES DURING A LOCA, CRITERION 3 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Dear Mr. Denton:

Pursuant to our response to Criterion 3 in our letter AEP:NRC:0678H dated August 2, 1984, we have completed the evaluation of plant procedures to determine the steps necessary to safely provide instrument air to the reactor coolant sample valves inside containment.

This letter summarizes the results of this evaluation.

To provide instrument air to the sample valves during safety injection, the Phase A containment isolation signal would have to be reset to permit opening the four (4) containment isolation valves that supply instrument air to the sample valves.

The evaluation determined that resetting the containment isolation signal would not affect the status of any containment isolation valves, safety injection, or safety related equipment.

Therefore, we are incorporating procedural changes to permit resetting the containment Phase A isolation and open the containment isolation valves for instrument air.

These changes will be implemented by the end of January, 1985.

8411140304 841107 PDR ADOCK 05000315 P

PDR

Mr. Harold R. Denton AEP -NRC:0678K This document has been prepared following Corporate procedures which incorporate a reasonable set of controls to insure its accuracy and completeness prior to signature by the undersigned.

Very truly yours,

'JP M.. Alexich

~ g, I Vice President ~'"'"i MPA/cm cc:

John E.

Dolan W. G. Smith, Jr.

Bridgman R.

C.

Cal len G. Bruchmann G.

Cham off NRC Resident Inspector Bridgman