ML20238C198

Forwards SER Re Operation of MSIVs During First Cycle W/ Refurbished Seat & Ball (Leak Integrity Problem).Resumption of Startup Testing & Operation for First Operating Cycle W/ Installed Refurbished MSIVs Authorized.Salp Input Also Encl

ML20238C198
Person / Time
Site:	Nine Mile Point
Issue date:	02/02/1987
From:	Lainas G Office of Nuclear Reactor Regulation
To:	Adensam E Office of Nuclear Reactor Regulation
Shared Package
ML20238A944	List: IA-87-438, Forwards SER & SALP Input Re Util Request for Permission to Operate W/Wye Pattern Globe MSIVs W/O Leakage Control Sys Being Required.Wye Pattern Globe MSIVs Replaced ball-type Msivs.Request Granted ML20238A940 ML20238B200 ML20238C116 ML20238C133 ML20238C168 ML20238C198 ML20238C580 ML20238C643 ML20238C650 ML20238C693 ML20238C712 ML20238C720 ML20244D225 ML20244D227 ML20244D230 ML20244D463 ML20244D466 ML20244D469 ML20244D473 ML20244E235 ML20244E388 ML20244E403 ML20244E456 ML20245A561
References
FOIA-87-438 TAC-63454, NUDOCS 8709090702
Download: ML20238C198 (1)

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,,i focket h h 60-410 MEMORANDUM FOR; Elinor Adensam Director

,j Project Directorate #3 t,O F

Diyision of BWR Licensing pe FROM:

Gus C. Lainas,' Assistant Director Division'cT.BWR Licensing

SUBJECT:

SAFETY EVALUATION FOR OPERATION OF MAIN STEAM ISOLATION VALVES DURING FIRST FUEL CYCLE WITH REFURBISHED SEAT AND BALL (LEAK INTEGRITY PROBLEM - TAC # 63454) f Ec By letters dated January 14', 23 and 27 and February 3, 1987 (NMP2L 0971, 0977, 0980, 0981, and 0990), the licensee has provided additional information on the

!" hine Mile Point Unit 2 Main Steam Isolation Valve (MSIV) leakage problem which l

supplements that which was evaluated in our October 27, 1986 SER. This information describes the recurrence of the MSIV leakage problem during preoperational testing in December, 1986, additional valve stroking and leak testing, as well as details on the MSIV prototype test program.

E The. enclosed SER covers the expected MSIV performance, MSIV leakage testing, the' prototype test program, the radiological evaluation of MSIV leakage greater than Technical Specification limits, and the equivalence of a 12 SCFH between the seat leakage test to that of a 6 SCFH through the valve test.

From the standpoint of Velve leak tightness, we find that Nine Mile Point Unit 2 may resume startup testing and operation for the first operating cycle with the installed refurbished MSIVs. The two additional MSIV problems on defective actuator and actuator control system logic are being addressed in separate SERs.

Our SALP input-is also enclosed.

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V Gus f. Lainas, Assistant Director Division of BWR Licensing

Enclosures:

As stated cc w/ enclosures:

R. W. Houston M. Haughey C. McCracken R. Hermann J. Calvo-R. Stevens Rv Bosnak J. Lombardo

Contact:

F. Witt. X29440 r:

FoT S - 8 7-U7 BIO 9090702 070028 3

PDR FDIA WETTERHG7-438 PDR m

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