ML20062L016

RO 2-81-02/1P:on 810105,at 100% Power,During Surveillance Testing,Reactor Core Isolation Cooling Pump Flow Indication Observed Upscale W/Pump Secured.Caused by Failed Square Root Extractor in Flow Control Loop.Extractor Replaced

ML20062L016
Person / Time
Site:	Peach Bottom
Issue date:	01/05/1981
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
RO-2-81-02-1P, RO-2-81-2-1P, NUDOCS 8101120429
Download: ML20062L016 (2)

Text

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PHILADELPHIA ELECTRIC C0wPANY Peach Bottom Atomic Power Station l Delta, Pennsylvania ,

17314 January 5, 1981 ~J J

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Mr. Boyce H. Grier, Director - .

Office of Inspection and Enforcement --

Regica 1 --

5 United States Nuclear Regulatory Cosmaission J:: _ q

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C31 Park Avenue N King of Prussia, PA 19406 5URJECT: REPORTABLE OCCURRENCE - PROWT NOTIPICAT_ ION Confirming 5. R. Roberts' conversation with Mr. Curt Cowgill, Region 1, United States Nuclear Regulatory Cosmaission on 1/5/51.

Reference:

Decket Number 050-277 Peach Botton Unit 2 Technical Specification

Reference:

3.5.D.1 Report No. 2-51-02/IP Occurrence Date: 1/5/81 Identification of Occurrence:

Reactor core isolation cooling subsystem inoperable.

Conditions Prior to Occurrence: l Unit 2 at 1004 power.

I Description of Occurrence:  ;

i During arercillance testing RCIC pump floor indication was observed upscale -

with the paup secured. Investigation revealed a failed square root extractor in l the flow control loop.

l Analysis of Oecurrence:

Safety iglications are considered minimal. The HPCI subsystem was immediately tested and proven operable. The RCIC subsystem was scill operable in manual from the control room and ins 11y operable from the emergency shotdown panel.

Corswetive Action:

'.'hdodimetive sepmas root extractor was replaced. The RCIC subsystem was

,-ammassaftally tested and returned to service.

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