ML20086G357

RO 75-24:on 751019,all Cooling Towers Removed from Svc. Caused by High Mud Content in River Water.After Mud Content in River Decreased,Cooling Tower a Returned to Svc. Corrective Maint Performed on Cooling Tower C

ML20086G357
Person / Time
Site:	Peach Bottom
Issue date:	10/29/1975
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Boyd R Office of Nuclear Reactor Regulation
References
RO-75-24, NUDOCS 8401110261
Download: ML20086G357 (2)

Text

-_

/ ._.

I> ,

) }; M M 'g N

PHILADELPHIA ELECTRIC COMPANY , i 2301 MARKET STREET QCT3MO7b~ ~!

\ ,.

m l PHILADELPHI A. PA.19101 t <

jj (21518414000 - . ' . -

. d .I M

October 29, 1975 Mr. Roger S. Boyd, Acting Director Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nu:.:1 car Regulatory Conraission Washington, D.C. 20555

Subject:

Environmental Deviation The following deviation was reported to Mr. Walt Baunack, Office of Inspection and Enforcement, Region 1, United States Nucicar Regulatory Commission on October 20, 1975.

Reference : License Number DPR-44/56 Environmental Technical Specifications: 2.1 Report No.: 50-277/278-75-24 Report Date: October 29, 1975 Deviation Date: October 19, 1975 Facility: Peach Bottom Atomic Power Station Units 2 and 3 R.D. #1, Delta, Pennsylvania 17314 Identification of Deviation:

Removal of all cooling towers from service.

Conditions Prior to Deviation:

Both units operating at approximately 557. power. River flows in excess of 100,000 cubic feet per second.

Descript ion of Deviation:

Large amounts of rainfall caused by local storme on October 17, October 18 and October 19, 1975 rapidly increased the Susquehanna River flow to a maximum of 139,000 cfs. With tne increase in river flow, the condition of the river became very muddy. The mud content in the river forced the removal from service of the two operable cooling towers because of repeated plugging of the lubricating water filter. Lubricating water is supplied to the main lift pump shaft.

COPY SENT REGION , ^

0401110261 751029 "

PDR ADOCK 05000277 S PDR N5 Id'

e. -- . _ -. --., __ - . . - - . _ _ . -- -.

Mr. Rogsr S. Boyd 50- 77/278-75-24 ,

October 29, 1975

() -

Paga 2' ,

4 i

Designation of Apparent Cause of Deviation:

High mud content in river water.

Analysis of Deviation:

l There is insignificant environmental impact associated with j this deviation since the river flows during the period of inoperability i of the cooling towers was in excess of 100,000 cfs.

Corrective Action:

)

The 'A' cooling tower was returned to service on 10/20/75 after the mud content in the river decreased. During the outage, cor-rective maintenance of the 'C' cooling tower was performed. This

, included repair to a leaking distribution header, replacement of the lube oil pump, and correction of additional fire alarm system nitrogen piping Icaks. The 'C' cooling tower was returned to service on 10/22/75.

Failure Data:

l A similar deviation was reported as 50-277/278-75-21 Very truly yours,

/

1. . Cooney erintendent eneration Div.-Nuclear cc: Mr James P. O'Reilly, Director, Region 1 Office of Inspection and Enforcement i United States Nucicar Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 t

6 h

I a

4 4

i Y, , - - - . , , N