ML20148H604

Forwards Application for Amend to License DPR-6,changing Tech Specs Re Frequency of Reactor Depressurization Sys Depressurizing Valve Testing by Eliminating Quarterly Partial Stroke Test

ML20148H604
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	03/22/1988
From:	Berry K CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20148H610	List: ML20148H604 ML20148H627 ML20148H633
References
NUDOCS 8803300044
Download: ML20148H604 (2)

Text

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Consumers Power Koueth W Berry 9Q96fgR$NG Durraor MKolNEAN'S PR06Ni55 ""'"' " " *'

General Offeces. 1945 West Parnall Road. Jadson. MI 49201 e (517) 7881636 March 12, 1988 Nuclear Regulatory Commission Document Control Desk Wast,?ngton, DC 20555 DOCKET 50-155 - LICENSE DPR BIG ROCK POINT PLANT -

TECHNICAL SPECIFICATION CHANGE REQUEST - FREQUENCY OF RDS DEPRESSURIZING VATVE TESTING Attached is a Request for Change to the Big Rock Point Technical Specifications.

As part of the Big Rock Yoint Integrated Plan, Issue B-082, Reactor Depressuri-zation System (RDS) Reliability Improvements, the attached proposed temporary surveillance testing frequency change, which eliminates the quarterly partial stroke test of the RDS depressurizing valves, is requested for the duration of Cycle 23 operation and, under a given set of conditions, for the duration of Cycle 24 operation. The existing requirements are paralleled in our proposed Inservice Testing Program. RDS reliability is believed to be enhanced by this request in two ways: (1) Improving the actual depressuri::ing valve test by full stroke testing one depressurizing valve each refueling outage. Currently valves are only partial stroke tested; and (2) Reducing depressurizing valve pilot valve leakage by demon erating that the existing partial stroke tests are a significant contributor to pilot valve leakage. If partial stroke testing is a significe.nt cc e cibutor, permanently increased testing frequencies may be justified provided the valves continue to have excellent stroke test success rate.

By letter dated November 26, 1984, Consumers Power Company had previously proposed a similar surveillance testing frequency change. This request was denied by NRC letter dated December 18, 1984 on the basis t. hat it was not supported by a thorough evaluation of the proposed testing frequency or of other alternatives to reduce pilot valve leakage. Our letter dated February 11, 1985 provided the NRC with resolutions to the specific concerns  ;

of the previous safety evaluation. Subsequent initiatives to reduce pilot )

valve leakage have been provided in our Integrated Plan Semiannual Updates I dated February 12, 1985, August 28, 1985, February 28, 1986, August 29, 1986, I

February 27, 1987, and August 31, 1987. Additional initiatives ate included with this change request. I 00 OC0288-UO44-NLO4 i

8s03300044 eso322 C PDR ADOCK 05000155 g P DCD )

2 Pursuant to 10CFR170.12(c), a check in the amount of $150.00 is remitted with this application.

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Kenneth W Berry Director, Nuclear Licensing CC Administrator, Region III, NRC NRC Resident Inspector - Big Rock Point Attachments OC0288-0044-NLO4