ML20042A258

Thirty-day Deficiency Rept Re Slamming of Two Cheek Valves in Turbine Exhaust Line,Originally Reported on 820205.Cause Not Stated.Damaged Components to Be Replaced by 820601

ML20042A258
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	03/09/1982
From:	Milligan M LONG ISLAND LIGHTING CO.
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
10CFR-050.55E, 10CFR-50.55E, SNRC-672, NUDOCS 8203230253
Download: ML20042A258 (2)

Text

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. e LONG ISLAND LIGHTING COM PANY FLd'O ve/ w // m et SHOREHAM NUCLEAR POWER STATION P.O. BOX 618, NORTH COUNTRY ROAD e WADING RIVER, N.Y.11792 March 9, 1982 SNRC-672 Mr. Ronald C. Haynes /

Office of Inspection & Enforcement, Region 1 ' ccM f g, sc ,,

U.S. Nuclear Regulatory Commission f <\

631 Park Avenue ,

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King of Prussia, PA 19406 02: m f

LONG ISLAND LIGHTING COMPANY

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SHOREHAM NUCLEAR POWER STATION - UN 721 - ,

DOCKET NO. 50-322 V f,- /

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Dear Mr. Grier:

On February 5, 1982, we reported verbally in accordance with 10CFR50. 55 (e) to Region 1, e deficiency concerning two check valves located in the RCIC Turbine Exhaust line. These valves manufactured by the Velan Engineering Company were examined after slamming was noted. The examination disclosed physical damage had occurred in various valve parts. This letter serves as our 30-day report on this deficiency.

Description of the Deficiency An Engineering and Design Coordination Report (E&DCR) was prepared by the System Startup Engineer reporting that the RCIC 8" Velan swing check valves revealed damage to the valve body, disc and mounting bracket bushings as a result of RCIC turbine and pump testing using auxiliary steam. Investigation of the circumstances leading up to the valve failures disclosed that the RCIC turbine was being tested at low flow conditions.

Examination of the valves has disclosed that the slamming and cyclic action of the valve resulted in wear to the swing check bushings, the anti-rotation pins and the swing checks. The valve bodies showed rubbing marks from the interaction with the swing check. Coincident with the above, we received G.E.

Application Informati'on Document (AID) No. 56 which describes the possible cyclic action (noisy operation) of the HPCI/RCIC turbine exhaust line check valves which may occur during startup testing and low flow conditions.

8203230253 820309 PDR 6 ADOCK 05000322 ,

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SNRC-672 March 9, 1982 Page 71o A systems review of the valve failures indicates that damage to these components could have an impact on the turbine exhaust back pressure thereby causing the turbine to trip and thus jeopardizing safety. Accordingly, it was determined that this constituted a reportable deficiency.

Corrective Action All damaged components of the RCIC . exhaust check valves will be replaced and the valves will be rebuilt to assure properly conditioned and working valves are installed. Additionally, the operational recommendations of G.E. AID No. 56 will be reviewed and station procedures will be updated as necessary to implement applicable means of reducing the RCIC turbine exhaust check valve duty.

Date of Full Compliance The replacement valve internals are being purchased from Velan.

We anticipate completion of the refurbishing process by June 1, 1982.

Very truly yours,

%. 5 M. H. Milligan Project Engineer Shoreham Nuclear Power Station RLS/pd cc: Mr. Richard DeYoung, Director NRC Office of Inspection and Enforcement Div. of Reactor Operations Inspection Washington, D.C. 20555 Mr. J. Higgins,-NRC Site Trailer Ec hk '*

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