ML20086G371

Environ RO 75-21:on 750926,all Cooling Towers Removed from Svc.Caused by High Mud Content in River Water.Cooling Towers Returned to Svc After Mud Content Decreased

ML20086G371
Person / Time
Site:	Peach Bottom
Issue date:	10/06/1975
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Boyd R US ATOMIC ENERGY COMMISSION (AEC)
References
RO-75-21, NUDOCS 8401110285
Download: ML20086G371 (2)

Text

_ __

i~

.s o 0

\

PHILADELPHIA ELECTRIC COMPANY 23O1 MARKET STREET PHILADELPHI A. PA.19101 1215)841 4000 October 6,1975 -

l Mr. Roger S. Boyd O(., .,

Acting Director C N ' f ,' o Division of Reactor Licensing ,

g.,g7d 'O  ;

i Office of Nuclear Reactor Regulation *

/( . , Ij United States Nuclear Regulatory Commission Washington, DC 20555 i .. y 3 ') , ;ff.,;f g,t gf ' t.y

Dear Mr. Boyd:

,, y Tiw

Subject:

Environmental Deviation .

The following deviation was reported to Mr. Don Caphton, Office of Inspection and Enforcement, Region 1, United States Nuclear Regulatory Comnission on September 26, 1975

Reference:

License Number DPR-44/56 Environmental Technical Specifications: 2.1 Report No.: 50-277/278-75-21 -

Report Date: October 6,1975 Deviation Date: September 26, 1975 i

Facility: Peach Bottom At'omic Power Station Units 2 & 3' R.D. -1, Delta, Pennsylvania .173'14 Identification of Deviation:

Removal of all cooling . towers from service.

Conditions Prior to Deviation: ,.

Both units operating at approximately 50X power. River flows in excess of 400,000 cubic feet per second.

Description of Deviation:

Large amounts of rainfall caused by Hurricane Elouisc significantly increased the Susquehanna River flow on September 25, 1975 thru September 30, 1975 The river condition during this period was very muddy and included largo quantitics of floating debris. The mud content in the river forced the removal from service of the two operable cooling towers becaQse of re-pcated plugging of the lubricating water filter. The lubricating water is supplied to the main lift pump shaft.

8401110285 751006 PDR ADOCK 05000277 S PDR g, ,

a xuaruaw

.-.. . - . . .~ . - - __ . _ _ . - . _. _ - - .-.

' 4 C/ ' 9tr. Roger S. B 0-277/278-75-21 2* October 6, 1975 Pago 2

< Designation of Apparent Cause of Deviation:

1 ,

High mud content in river water.

Analysis of Deviation

-

There is insignificant environmental impact associated with -

i the deviation since the river flows during the period of inoperability of the cooling towers was in excess of 200,000 cubic feet per second.

Corrective Action: .

l The cooling towers were returned to service af ter the mud j content in the river decreased. The 'B' cooling tower was returned to service ear ly on 9/29/75 The 'C' cooling tower was returned to service late on 9/29/75 The 'C' cooling tower remained out of scrvice for an additional day in order to permit an underwater inspection of the cooling tower lif t pump impeller and suction plenum.

Failure Data:

' ^

None similar.

Very truly yours, *

/

1 H. Cooney Ass Gen't Superintendent -

Generation Division 1

a cc: Mr. J. P. O'Reilly Director, Region 1 Office of Inspection and Enforcement '

United States Nuclear Regulatory Commission 631 Park Avenue

' King of Prussia, PA 19406 . -

4 1

.; i i

i e

6 4

e i

.-. ~ ._ ._ _ , , _