ML20024A067

Response to ASLB 830526 Memorandum & Order Directing Clarification of Certain Matters Re Contention Sc 11.Every safety-related Check Valve Included in Inservice Testing Program & Tested in One of Three Ways

ML20024A067
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	06/10/1983
From:	Flanagan D HUNTON & WILLIAMS, LONG ISLAND LIGHTING CO.
To:
Shared Package
ML20024A068	List: ML20024A067 ML20024A069 ML20024A074
References
IEB-83-03, IEB-83-3, ISSUANCES-OL, NUDOCS 8306150370
Download: ML20024A067 (3)

Text

.

, LILCO, June 10, 1983

.g UNITED STATES OF AMERICA 00CXETED i C NUCLEAR REGULATORY COMhISSION Before the Atomic Safety and Licensin d r 20:22 In the Matter of )

)

LONG ISLAND LIGHTING COMPANY ) . Docket No. 50-322 (OL)

)

(Shorenam Nuclear Power Station, )

Unit 1) )

Response to the Board's Memorandum and Order Directing Clarification of Certain Matters Related to Contention SC 11 Tnis response provides the Board with information re-quested in its " Memorandum and Grder Directing Clarification of Certain hatters helated to Contention SC 11" (hay 26, 1963).

Specifically, it addresses the following four questions:

(1) nhat safety-related check-valves are includ-ed in LILCO's In-service Testing (IST) pro-gram; (2) hhat number'of check valves will be tested; (3) Will the testing follow the recommendations of Bulletin 83-03; and (4) What is the extent of LILCO efforts to iaen-tify the causes of passive mecnanical valve failures.

Tnis response answers these questions in narrative forr..

Supporting details are provided in tne Affidavits of Jonn A.

Rigert and' John F. Alexander, whicn are attached.

(1) Check valves from tne following systems are included

~in the IST program: Service Water-(including Diesel Generator Cooling water Supply check valves), Main and Auxiliary Steam, 8306150370 830610 PDR ADOCK 05000322 C PDR ye .

( . Feedwater, Reactor Water Recirculation, Control Rod Drive, Standby Liquid Control, Residual Heat Removal, Core Spray, High Pressure Coolant Injection, Fuel Pool Cooling and Clean-up, Reactor Core Isolation Cooling, Radwaste, Reactor Water Clean-up, Reactor Building Standoy Ventilation and Control Room Air Conditioning, Reactor Building Closed Loop Cooling Water, Instrument and Service Air, Fuel Oil Transfer, Diesel Generator Air Start, and Primary Containment Atmospheric Control.

(2) Each and every one of the 579 safety-related enecx valves at Shoreham is included in the IST program and eacn one

-- not just a sample -- is tested in one of three ways:

forward flow testing, reverse flow testing, or both forward anc reverse flow testing.

(3) I&E Bulletin 83-03 imposed a requirement tnat diesel generator cooling water supply check valves be tested for botn forward and reverse flow. LILCO complies fully with that specific requirement. Selection of flow direction for testing valves in Shoreham's IST program was based upon tne required valve response for proper system operation. For example, it a valve must allow forward flow and prevent reverse flow, tnen it is tested for botn forward and reverse flow. Thus, there are 50 check valves in the IST program that are tested for both forward and reverse flow.

(4) LILCO's efforts to identify passive mechanical valve failures are part of its general evaluation of industry experi-ence. This evaluation was explained during the litigation of, among others, SC Contention 11. See LILCO's Findings D-12 to

. -20. LILCO's primary efforts presently consist of evaluating NRC and other industry documents that report passive mechanical valve failures. Identifying the causes of the valve failures is an integral part of sucn evaluations. The Affidavit of John F. Alexander describes the efforts of tne Independent Safety Engineering Group (ISEG) that are presently underway.

In addition, the Affidavit of John A. Rigert briefly describes a computerized program, under consideration by LILCO, that can be used to incorporate industry and Shoreham-specific valve-related-experiences into the IST and preventive mainte-nance programs. This program would assist LILCO in performing trending analyses and in identifying common causes of not only passive mecnanical valve failures but all valve failures.

h Q J7 e's Faniel O. Flanagan/

g One of LILCO's Coun/sel Hunton & Williams 707 E. Main Street P.O. Box 1535 Richmon6, Virginia 23212 DATED: June 10, 1983 t

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