ML20136J519

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Ack Receipt of Insp Rept 50-309/85-28.Steam Generator Low Pressure Instrument Slow Response Time Caused by Degraded, Not Inoperable,Condition
ML20136J519
Person / Time
Site: Maine Yankee
Issue date: 01/02/1986
From: Whittier G
Maine Yankee
To: Murley T
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
6895L-GDW, GDW-86-02, GDW-86-2, MN-86-02, MN-86-2, NUDOCS 8601130462
Download: ML20136J519 (1)


Text

MAME 9ADHEE AToml0 POWER 00MPARUe avausrA$ain"a5 January 2,1986 (207) 623 3521 ff MN-86-02 GDW-86-02 O

Region I United States Nuclear Regulatory Commission Office of Inspection and Enforcement 631 Park Avenue King of Prussia, Pennsylvania 19406 Attention: Dr. Thomas E. Murley, Regional Administrator

References:

(a) License No. OPR-36 (Docket No. 50-309)

(b) USNRC Letter to MYAPCo dated November 26, 1985 (c) MYAPCo Letter tci:USNRC dated November 27, 1985 (MN-85-201)

(d) USNRC Letter to ilYAPCo dated August 28,1985 (Inspection Report 50-309/84-19)

Subject:

Region I Inspection 50-309/85-28 Gentlemen:

We have reviewed the subject inspection report and we believe it to be generally accurate. However, we do have several comments which are provided below for your consideration.

As noted in Reference (c), we believe that the steam generator low pressure instruments would have functioned properly but it is possible that their response time may have been slow in the event of rapid pressure changes. For this reason, we believe the instruments were potentially degraded instead of inoperable as stated on pages 1 and 2 of Reference (b).

The as found positions of the steam generator low pressure instrument root valves on August 7,1985 were described in Reference (d) as follows: three of the root valves were found to be open, and six were found to be partially We open. The as found position of three root valves was not determined.

request that page five of Reference (b) be modified to reflect these as found valve positions.

Please contact us if you have any questions in this matter.

Very truly yours, MAIE YAN<EE ATOMIC POWER C0f43ANY

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B601130462 860102 PDR ADOCK 05000309:

h/8 AV G ppg G. D. Whittier, Manager Nuclear Engineering & Licensing GDW/bjp cc: Mr. Ashok C. Thadani, Director Mr. Cornelius F. Holden D\

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