ML17324B276
| ML17324B276 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 03/11/1987 |
| From: | Alexich M INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| AEP:NRC:0692AX, AEP:NRC:692AX, NUDOCS 8703170070 | |
| Download: ML17324B276 (4) | |
Text
REGULATORY FORMATION DISTRIBUTION S EM (RIDS)
ACCESSION NBR: 8703170070 DOC, DATE: 87/03/11 NOTARIZED:
NQ DOCKET 0 FACIL:50-315 Donald C.
Cook Nucl'ear Pover Plant>
Unit ii Indiana 5
05000315 50-316 Donald C.
Cook Nuclear Pomer Plant>
Unit 2.
Ind iana 5
05000316 AUTH. NAME AUTHOR AFFILIATIQN ALEXICHiM. P.
Indiana h Michigan Electric Co.
RECIP. NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Submits amend to position on super'vision of manual isolation valves associated e/reactor coolant pumps.fire suppression sos. Plans to continue indefinitelg chaining Sc. locking isolation valves in open position.
DISTRIBUTION CODE:
A006D COPIES RECEIVED: LTR ENCL SI.ZE:
TITLE: QR/Licensing Submittal: Fire Protection NOTES:
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INDIANA & MICHIG AN ELEC TR IC COMPA NY P.O. BOX 16631 COLUMBUS, OHIO 43216 March 11, 1987 AEP:NRC:0692AZ Donald C.
Cook Nuclear Plant Unit Nos.
1 and 2
Docket Nos.
50-315 and 50-316 License Nos.
DPR-58 and DPR-74 INOPERABLE TAMPER SWITCHES ON ISOLATION VALVES OF FIRE SUPPRESSION SYSTEM INSIDE CONTAINMENT U.S. Nuclear Regulatory Commission Attn: 'ocument Control Desk Washington, D.C.
20555
Dear Sirs:
The purpose of this letter is to amend our position on the supervision of the manual isolation valves associated with the reactor coolant pumps fire suppression systems.
In our letters dated January 31, 1977 and March 31, 1983 (AEP:NRC:0692E),
we stated that supervisory capability for all shut-off valves for individual water suppression systems is provided by position-indication tamper switches.
In our letter of January 16, 1986 (AEP:NRC:0692AI) we advised you of the inoperability of four tamper switches that provide electrical supervision of the above manual isolation valves in Unit 1 containment.
Although we stated in our letter of January 16, 1986 that we planned to repair the four inoperable tamper switches, we now believe that it would be more expedient (and just as effective) to continue indefinitely with the compensatory action described in that letter,
- namely, the chaining and locking of the isolation valves in the open position.
The repair of the broken tamper switches would have required removal of the present
- switches, design and engineering work for the procurement of new
- switches, and installation during an outage to minimize ALARA concerns.
We believe that chaining and locking the valves, which are located in containment, would be just as-effective as electrical supervision because of the strict controls on entry into containment.
Furthermore, the locking of such valves in their open position is consistent with the NFPA codes.
8703170070 870311 PDR ADQCK 05000315 F
PDR Ok pD
~ 'EP'NRC:0692AX The Unit 2 tamper switches are performing satisfactorily at this time.
However, in the event we develop malfunctions with the Unit 2 containment tamper switches, we will also implement this procedure in Unit 2.
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, f'.
P. Alex'.ch Vice President cc:
John E. Dolan W.
G. Smith, Jr.
- Bridgman G. Bruchmann R.
C. Callen G. Charnoff NRC Resident Inspector
- Bridgman J.
G. Keppler
- Region III