ML20197G904
| ML20197G904 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 05/23/1984 |
| From: | Whittier G Maine Yankee |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 3001L-GDW, GDW-84-110, MN-84-81, NUDOCS 8406180200 | |
| Download: ML20197G904 (2) | |
Text
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e May 23, 1984 MN-84-81 GDW-84-110 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. DPR-36 (Docket No. 50-309)
(b) MYAPCo Letter to USNRC dated May 4, 1984 (MN-84-74)
Subject:
Reactor Trip Breakers Gentlemen:
Reference (b) provided a reactor trip breaker testing and maintenance program for Cycle 8 operation. A revised program based on comments received from members of your staff is s',tached herewith.
We understand that the staff is revising its staridard technical specifications for reactor trip breaker testing and cocracility.
We plan to evaluate the need for enanges to Maine Yankee Technicil Specifications associated with reactor trip breakers based on the rerised guidance from the staff.
Very truly yours, MAINE YANKEE ATOMIC POER COWANY G. D. Whittier Licensing Section Head GOW/bjp
Enclosure:
(1 Page) cc: Mr. James R. Miller Mr. Cornelius F. Holden lb 8406180200 840523 PDR ADOCK 05000309 P
PDR I
3001L-GDW
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MAINE Y ANK3C ATOMIC POWEN COMPANY MAINE YANKEE REACTOR TRIP BREAKER TESTING AND MINTENANCE PROGRAM CYCLE 8 OPERATION Testing o
1.
The in service reactor trip breakers will be demonstrated operable by testing within one week prior to the startup for Cycle 8 operation.
2.
Monthly surveillance testing of each inservice break'er will be conducted as required by Technical Specification 4.1.
3.
In addition, periodic timing tests of the undervoltage trip device will be performed on a schedule which permits increasing the interval based upon performance as follows:
a.
Weekly for 3 consecutive weeks.
If operating time is 100 ms, or less, interval may be increased to monthly, b.
Monthly for 3 consecutive months.
If operating time is 100 ms. or less interval may be increased to quarterly, c.
Quarterly testing will continue for the remainder of Cycle 8.
d.
Operation times in excess of 100 ms, indicate the need for remedial maintenance and the adoption of an increased testing frequency on the breaker until confidence is restored.
c.
The reactor trip breaker will not be intentionally cycled just prior to a timing test of the undervoltage trip device.
f.
A breaker which falls the periodic timing test (greater than 100 ms.) must be opened or removed from its cubicle until it can pass the timing test.
4.
Timing tests of the shunt trip will be performed on a refueling interval.
5.
A breaker will be considered operable if it opens within 100 m1.
when tested as described above or it is either locked in its open position or completely removed from its cubicle, o
Maintenance Regular preventative maintenance will be performed quarterly as outlined in maintenance department procedures. Procedures will incorporate the most. recent advice from General Elcetric including avoidance of "reyitalizing" fluids"on breakers with the impruved lubricant.
l 3001L-GOW
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