ML20086G048

Telecopy AO 75-56:on 750817,standby Gas Treatment Sys Fan OBV20 Failed to Auto Start.Cause Under Investigation. Corrective Maint Will Be Performed Subsequent to Identifying Problem

ML20086G048
Person / Time
Site:	Peach Bottom
Issue date:	08/18/1975
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086G029	List: ML20086G026 ML20086G048
References
A-75-56, A0-75-56, NUDOCS 8401100031
Download: ML20086G048 (1)

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. 1 PHILADELPHIA ELECTRIC' COMPANY Peach Botton Atomic Power Station ~

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Confirning W. T. U11 rich's phone conversation with Mr. Jim Partlov, Region.1, United States.liuelear Reguintory/Conniasi-- -

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Reference:

License- Ilumber DPR-4h . .

Technical Specification

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• Report Date: August.It?. 1975 Occurrence Date:. Au g u st- 17, 1975 -

,4 Facility: Pench Botton Atomic Power Station

• R.D. 1, Delta.. Pennsylvania 17314 j

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. Identification.of Occurrence:

Standby Gas Treatment Systen Fan.(OBV20)s failed to "AUT0" start.. i Conditions Prior to Occurrence-Unit 2 shutdown. f Description of Occurrence: .

During the performance of ST 1.3. PCIS Logie Systen Functional Test, the "B" fan failed to " AUTO" start with.the "A" fan in " Pull To Lock" and a reactor building ventilation isolation signal.

Designation of Apparent Cause of Occurrence: - -

Under investigation.

Analysis of Occurrence:

, During the test, on the reactor building ventilation isolation signal.

the "A" SBGTS fan started autenatically. In addition,'the "B" fan operated satisfactorily manually. Safety implications are, therefore.

' . minimal.

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Corrective Action:

Corrective maintenance vill be performed subsequent to identifying the problem.

Failure Data:

A previous failure of this type was reported as AO Su-277-7L-50.

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} Yery truly yours.

SVWd W. T. Ullrich, Superintendent l Peach Botton Atomic Power Station

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