ML18093A570

Advises That Util Implemented Pilot Program to Replace,On Trial Basis,Five Mechanical Snubbers W/Lisega Hydraulic Snubbers.Util Requests That Trial Snubber Program Be Controlled Under 10CFR50.59

ML18093A570
Person / Time
Site:	Salem
Issue date:	01/04/1988
From:	Corbin McNeil Public Service Enterprise Group
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
NLR-N87235, NUDOCS 8801130183
Download: ML18093A570 (2)

Text

Public Service Electric and Gas Company Corbin A. McNeil!, Jr. Public Service Electric and Gas Company P.O. Box236, Hancocks Bridge, NJ 08038 609 339-4800 Senior Vice President -

Nuclear January 4, 1988 NLR-N87235 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Gentlemen:

TRIAL SNUBBER PROGRAM SALEM UNIT NO. 1 DOCKET NO. 50-272 Salem Unit 1 currently uses Pacific Scientific type mechanical snubber models PSA-1/4 and PSA-1/2. These snubbers have historically exhibited a high failure rate during surveillance testing. Consequently, PSE&G has been evaluating the possibility of replacing these snubbers with types having a better performance record. Our evaluations have identified Liseg~

hydraulic snubbers, manufactured in Germany, to have a superior performance record. PSE&G has implemented a pilot program to replace, on a trial basis, five mechanical snubbers with Lisega hydraulic snubbers during the current Salem Unit 1 outage. These snubbers will be placed into service until the next refueling outage, at which time they will be removed and functionally tested and evaluated.

Mr. Don Fischer of your staff was contacted on December 10, 1987, concerning this matter. PSE&G requested that the trial snubber program be controlled under the provisions of 10CFR50.59. Mr.

Fischer was informed that the Lisega snubbers are a replacement since these snubbers have the same design load, qualification, pin to pin distance, and end attachments as the PSA models.

Also, like the PSA models, the Lisega snubbers are built to ASME Section III requirements. Unlike the PSA models however, each Lisega snubber is dynamically tested and evaluated by the manufacturer.

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• Document Control Desk 2 January 4, 1988 On December 14, 1987, Mr. Fischer indicated that after discussions with NRR technical review personnel, the snubber trial program could be conducted subject to the requirements of 10CFR50.59. Furthermore, he requested that this matter be documented in writing. This letter provides this documentation.

If you should have any further questions regarding this matter, please do not hesitate to contact us.

C Mr. D. c. Fischer USNRC Licensing Project Manager Mr. T. J. Kenny USNRC Senior Resident Inspector Mr. w. T. Russell, Administrator USNRC Region I Mr. D. M. Scott, Chief Bureau of Nuclear Engineering Department of Environmental Protection 380 Scotch Road Trenton, NJ 08628