ML20204B362

Part 21 & Deficiency Rept Re Reactor Protection Sys Power Supply Circuit Breaker Deficiencies.Initially Reported on 860616.Unit 3 Mods Complete.Unit 2 Mods,To Be Completed During Spring 1987 Outage,Currently in Progress

ML20204B362
Person / Time
Site:	Peach Bottom
Issue date:	03/19/1987
From:	Gallagher J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
REF-PT21-87, REF-PT21-87-082-000 PT21-87-082-000, PT21-87-82, NUDOCS 8703250038
Download: ML20204B362 (2)

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PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 PHILADELPHIA. PA.19101 1215) 841 5001 JOSEPH W. G ALLAGH E R

. uT.". .".".'.*.","7.. . March 19, 1987 Docket Nos. 50-277 50-278 Dr. Thomas E. Murley, Administrator Region I U. S. Nuclear Regulatory Commission ATTN: Document Control Derk Washington, D.C. 20555

Subject:

Peach Bottom Atomic Power Station Units 2 and 3 Reactor Protection System Power Supply Circuit Breakers

Reference:

10 CFR Part 21 Report, S. L. Daltroff, PECo to Dr. T. E. Murley, NRC, dated June 16, 1986

Dear Dr. Murley:

The purpose of this letter is to inform you that the modifications at Peach Bottom Atomic Power Station Unit 3 to correct Reactor Protection System power supply circuit breaker deficiencies have been completed. The proposed modifications will be completed on Unit 2 during the spring 1987 outage, now in progress.

The referenced report notified the NRC of a manufacturing defect in Westinghouse Reactor Protection System (RPS) power supply circuit breakers at Peach Bottom along with our immediate and long term corrective action to prevent future failures. It was stated in the report that we expected to perform the modifications on the Unit 3 RPS power supply breakers during a mid-cycle weld inspection outage. By order modification dated December 31, 1986, R. M. Bernero, U.S. NRC to E. G. Bauer, Jr., PECo, the requirement for the mid-cycle weld inspections was withdrawn. Consequently, the mid-cycle outage was eliminated and the Unit 3 modifications were rescheduled and completed on March 9, 1987 during an unplanned outage.

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. , . s Dr. Thomas E. Murley March 19, 1986 Page 2 Should you have any questions or require additional information, please do not hesitate to contact us.

Very truly yours,

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cc: Addressee J. M. Taylor, Director, NRC, Office of Inspection & Enforcement (3)

T. P. Johnson, Resident Site Inspector 1

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