ML20094H054

1991 Annual Rept of All Challanges to Safety Relief Valves, Unit 1 - Rept 7 & Unit 2 - Rept 3

ML20094H054
Person / Time
Site:	Limerick
Issue date:	02/21/1992
From:	Leitch G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9203060349
Download: ML20094H054 (2)

Text

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, . TS 6.9.1.5.b PIIILADELPIIIA ELECTRIC COMI%Ny 3924009420 j LIMERICK GENERATING STATION P. O. BOX 2300 Pulu1GVN, PA 19464-0920 (215) 3271200, EXT, 3000  :

February 21, 1992 l GTf@$cH Docket Nos. 50-352  ;

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License Nos. IIPF-39 HPF-85 l

U. S. Nuclear Regulatory Commission 1 Attn Document Control Desk Washington, DC 20555

Subject:

Limerick Generating Station, Units 1 and 2 1991 Annual Report of All Challenges to Safety / Relief Valves, Unit 1 - Report No. 7 and Unit 2 - Report No. 3 1

Gentlemen:

This letter transmits the Limerick Generating Station, Units l 1 and 2 1991 Annual Report of All Challenges to Safety / Relief l Valves. This report represents Report No. 7 for Unit 1 and Report l No. 3 for Unit 2, as required by Technical Specification 6.9.1.5.b. '

The definition of challenges - considered in this report is the automatic opening 'of main steam system - safety / relief valves in response to high reactor pressure.

Unit 1 (Recort No.-7) -

During 1991,'there was one event which automatically _ opened-several of the main steam safety / relief valves-in response to high reactor pressure.

On April 12, 1991, the Unit 1 Mair Turbine tripped and the-reactor; scrammed _ due to an Electro-Hydraulic Control'(EHC) system electrical malfunction.. The-resulting pressure spike -

-caused the1H', '1K', and 81N'~-Safety Relief Valves (SRV's) to momentarily _'open.

I 7203060349 920221 h.

PDR ADOCK 05000352 ./

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3924009420 U.Di U (Renort No. 3)

During 1991, there were no events which automatically opened the main steam safety / relief valves in response to high reactor pressure.

Surveillance testing of the five (5) safety relief valves associated with the Automatic Depressurization System was conducted in June 1991 with satisfactory results, as part of preparation for restart of the unit following the first refueling outage.

Documentation of all challonges to the main steam system safety / relief valves has been submitted as part of the monthly operating report in order to comply with Technical Specification 6.9.1.6.

Should you have any questions concerning this matter, please contact us.

very trul yours,

/f A ,

hTM/dtc cc: T. T. Martin, Administrator, Region I, USNRC T. J. Kenny, USNRC Senior Resident Inspector, LGS

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