ML20028G822
| ML20028G822 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 08/27/1990 |
| From: | Nichols S Maine Yankee |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-89-10, IEB-85-003, IEB-85-3, MN-90-82, SEN-90-242, NUDOCS 9009050062 | |
| Download: ML20028G822 (2) | |
Text
-
'(
MaineYankee 1
httsrut itreni6fOoa uwil.nct we ED: SON DRVE
- AUGUSTA, MAINE 04336 + (207) 022 4868 t
August 27, 1990 MN-90-82 SEN-90-242 UNITED STATES NUCLEAR REGULATORY COMMISSION Attention:
Document Control Desk Washington, DC 20555
References:
(a) License No. DPR-36 (Docket No. 50-309)
(b) USNRC IE Bulletin No. 85-03:
Motor-0perated Valve Common Mode Failures During Plant Transients Due to Improper Switch Settings, dated November 15, 1985 (c) USNRC Letter to MYAPCo dated June 28, 1989:
Safety-Related Motor-Operated Valve Testing and Surveillance (Generic Letter No. 89-10)
(d) MYAPCo letter to USNRC dated February 1, 1990 (MN-90-15)
(e) USNRC Letter to MYAPCo dated June 18, 1990
Subject:
Maine Yankee Motor-Operated Valve (MOV) Testing and Surveillance -
y Response to Generic Letter No. 89-10 L
t Gentlemen:
NRC Generic letter 89-10, Reference (c), expanded the scope of' valves covered by NRC Bulletin 85-03, Reference (b), to include additional safety class MOVs, and l
l aosition changeable MOVs.
Maine Yankee responded to the action iter s of Generic
.etter 89-10 by Reference (d).
In general, Maine Yankee's plan is to build on our already acceptable MOV program to incorporate the additional measures of Generic Letter No. 10.
By Reference (e), the staff provided several comments and l
recommendations on our MOV program and requested a discussion of our plan with respect to the five-year or three-refueling outage schedule recommended by the Generic letter for completion of the initial test program.
With respect to the staff's recommendations, we note the following:
1.
Our switch setting program is a living program.
We are involved with inoustry activities.
We do modify our program as necessary to be consistent with current knowledge with respect to MOV operating characteristics.
l 9009050062 900827 fDR ADOCK 05000309 I[f PDC SEN90242.LTR C-
MaineYankee UNITED STATES NUCLEAR REGULATORY COMMISSION MN-90-82 Attention: Document Control Desk Page Two 2.
We are aware of and, as appropriate, utilize the "two stage" approach as part of our MOV program.
3.
We recognize the value of "as found" data, especially as it applies-to potentially lengthening periodic requirements. Our plan is that once the initial test cycle is complete (in 1993), our program description will incorporate the recording of as-found trending data upon subsequent tests, j
With respect to our )lans relative to the five-year or three-refueling outage schedule recommended by tie GL for completion of the initial test program, we did not interpret Item 1 of the GL to require a specific commitment date for design basis reviews.
We recognize that design basis reviews must be completed for a specific valve well in advance of testing that valve.
We are pursuing these reviews on a cycle basis to support scheduled testing.
Approximately half of the anticipated scope of the GL already has a completed design review.
We believe our initial program will be completed within the recommended schedule. We have just completed the first of three refueling outages in our test program.
By the end of our next outage, all MOVs will have been tested to either the GL or the Bulletin's requirements and by the end of the 1993 refueling outage, all MOVs will have completed the initial GL test program.
We trust this information is satisfactory.
Please contact us should you have any further questions.
Very tru,1y yours, I
W /UIL d4 S. E. Nichols Licensing Section Head WBD:SJJ c:
Mr. Thomas T. Martin Mr. Charles S. Marschall Mr. Eric J. Leeds SEN90242.LTR
-