ML20203B836

Requests plant-specific Info & Data to Resolve Generic Issue 105, Interfacing Sys LOCAs at Lwrs, Including Plant Surveillance Testing Procedures for Rhr,Lpci,Hpci & RCIC

ML20203B836
Person / Time
Site:	Peach Bottom
Issue date:	04/07/1986
From:	Gears G Office of Nuclear Reactor Regulation
To:	Daltroff S PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
References
NUDOCS 8604180265
Download: ML20203B836 (2)

Text

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.. Docket Nos. 50-277/278-

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~ APR O 71566

)Mr,.,Sc;L. . Da l t ro f f- .

,Vice President, Electric Production .

4 Philadelphia Electric. Company- n g i. '

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.- 2301' Market-Street-E ,1 ~P.O.-Box 18699 ~

; ;Phil'ade1phia, Pennsylvania 19101-ne .

SUBJECTI REQUESTED ASSISTANCE (PLANT INFORMATION) FROM THE' PHILADELPHIA -

x - * + ELECTRIC-COMPANY CONCERNING NRC RESEARCH ACTIVITIES TO RESOLVE GENERIC

/; i ISSUE'105-INTERFACING SYSTEMS LOCAs AT LWRs. 3

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Dear M,

r.-Kemper:

~Re Peach Bottom Atomic Power Station, Units 2 and 3 Recently,~there have been reported failures of the boundary between the reactor coolant system and low pressurJ injection systems-in several

> plants. .In these cases, there was a degradation of the pressure f isolation valves due~to personnel errors. None of these plants '

were required'to leak-test pressure isolation valves.

-These recent operating events. indicate that the isolation valves between the reactor coolant' system and low pressure interfacing systems may not adequately protect ~against over pressurization of low pressure-systems. As such, the frequency of a LOCA, combined with a failure of-the ECCS, may result in an unacceptably high public risk.

In order'to resolve this issue, the NRC staff together with its contractor is undertaking a research' effort. For meaningful resolution of this generic. issue, we request your voluntary assistance in helping the NRC gain.certain plant specific information and data on the Peach Bottom facility. The type of information requested entails copies of certain plant surveillance testing procedures for RHR, LPCI, HPCI, and' RCIC. Also'the staff would need certain P&ID drawings for the systems mentioned above as well as RWCU. A specific list of desired information could be the subject of a information gathering visit by NRC'to Philadelphia and/or Peach Bottom.

'Please contact me if the' Philadelphia Electric Company can assist us..in thi s -~ ma t ter . We would appreciate a contact to whom the'NRC research personnel can go to directly.

8604180265 860407 PDR ADOCK 05000277 P PDR s

.fj No if.you have any questions, please call me at (3011-492-4993.

Sincerely, WI 8 1U11 cig:;n Gerald E. Gears Project Manager, Prcject Directorate #2 Division of BWR Licensing

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