ML20154A961

Special Rept:On 880822,discharge Pressure Lost While Motor Driven Fire Pump in Operation.Caused by Crack That Formed in Column Pipe Flange Area Where It Bolts to Pump.Motor Driven Pump Removed from Pump Structure,Disassembled & Inspected

ML20154A961
Person / Time
Site:	Peach Bottom
Issue date:	09/01/1988
From:	Danni Smith PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Russell W NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
NUDOCS 8809130150
Download: ML20154A961 (2)

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. t Paxa surro%rus rowin or excsitesca D. M. Smith Vice President PHILADELPHIA ELECTRIC COMPANY PEACil BOTTOM ATOMIC POWER STATION R. D.1, ikx 2u8 Delta, Pennsylvania 17314 (717) 456 7014 September 1, 1988 Docket Nos. 50-277 50-278 Mr. W. T. Russell U. S. Nuclear Regulatory Commission ATTN

Document Control Desk Mail Station P1-137 Washington, DC 20555

SUBJECT:

REPORTABLE OCCURRENCE - Both Fire Pumps Out Of Service At Peach Bottom Atomic Power Station

Reference:

Peach Bottom Units 2 and 3 Technical Specifications (TS) 3.14.A

Dear Mr. Russell:

This special report, involving the simultaneous inoperability of both fire pumps, is being submitted pursuant to the referenced Technical Specification and satisfies the 14 day reporting requirements in accordance with TS 3.14.A.3b and the 31 day reporting requirements in accordance with TS 3.14.A.2.

identification of Occurrence:

At 1400 on August 22, 1988, while the motor driven fire pump was i operating, discharge pressure was lost. The pump was immediately secured and declared inoperable. Since the diesel driven fire pump was out of service for preventative maintenance, this occurrence rendered both fire pumps inoperable.

At the time of this occurrence, Unit 2 was in cold shutdown and Unit 3 was in i the refuel mode with the vessel defueled. A 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> notification was made to the NRC Operations Center at 1915 and a written notification was submitted on 8/23/88.

Cause of Occurrence:

The pump failure was caused by a crack that formed in the column pipe flange weld area where it bolts to the pump. This degradation resulted in misalignment of the pump and the subsequent failure of the shaft coupling.

8809130150 880901 gDR ADOCK 05000277

PDC 1 0

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k TO: Mr. W. T. Russell Page 2 Actions Taken:

The diesal driven fire pump was returned to service on 8/22/88 at 1855.

The motor driven pump was removed from the pump structure, disassembled and inspected. Since the parts necessary for repair are not available, and the vendor no longer manufactures this particular model, a replacement pump has been ordered.

Plans and Schedule:

The vendor is scheduled to ship the replacement pump on 9/2/88. It is expected that the new pump will be in service by 9/9/88.

Sincerely, cc: W. T. Russell, Administrator, Region 1. USNRC R. E. Martin, USNRC Project Manager T. P. Johnson, USNRC Senior Rasident Inspector T. E. Ma9ette, State of Maryland