ML20086G415

Environ RO 75-16:on 750829,cooling Tower B Lift Pump Tripped.Caused by Plugging of Lubricating Water to Pump Shaft.Lift Pump Lubricating Water Filter & Flow Switch Cleaned & Returned to Svc

ML20086G415
Person / Time
Site:	Peach Bottom
Issue date:	09/08/1975
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Boyd R US ATOMIC ENERGY COMMISSION (AEC)
References
RO-75-16, NUDOCS 8401110360
Download: ML20086G415 (2)

Text

w O O PHILADELPHIA ELECTRIC

• COM PANY - f r w.

/

23O1 MARKET STREET ,. ,5[

j ;~.i ,/.'. *

'~\

PHILADELPHI A. PA.19101 3, f3(

9- c.-

'0 (2151048-400o ],\ .y 3

< .:s* *-

September 8, 1975 \ jf.; , , .,

Mr. Roger S. Boyd ' k W[,* M

~

Acting Director Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nuclear Regulatory Commission

Subject:

Envi ronmental Devia tion The following deviation was reported to Mr. Walt Baunack, Office of Inspection and Enforcement, Region 1, United States Nuclear Regulatory Commission on August 29, 1975.

Reference:

License Number DPR-44/56 Envi ronmental Technical Speci fications 2.1 Report No.: 50-277/278-75-16 Report Date: September 8, 1975 Deviation Date: August 29, 1975 Faci li ty: Peach Bottom Atomic Power Station Units 2 & 3 R.D. #1, Delta, Pennsylvania 17314 Identification of Deviation:

Inoperabili ty of 'B' cooling tower for approximately two hours wi th river flows less than 10,000 cfs.

Condi tions Prior to Deviation:

Units 2 and 3 were operating at approximately 55% power.

Description of Deviation:

At approximately 2:40 p.m., on August 29, 1975, the 'Br cooling tower lif t pump tripped. River flows at thi s time were ap-proximately 7800 cfs. The 'A' and 'C' cooling towers were operational at this time.

Designation of Apparent Cause of Deviation:

[O h Tripping of the 'B' cooling tower lif t pump was traced to /-/7 M plugging of the lubricating water to the pump shaf t. /

8401110360 750908 PDR ADOcK 0500027 PY SENT REGION

[_

S o: f >

r ~. s 0

~,

, , ,.. Mr. Rog$r S. Bol ' '

(} 50-277/278-75-16 Srptember 8, 1975 Page 2 Analysis of Deviation:

The total period of time that the 'B' cooling tower was out of service was approximately 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. Temperature monitoring did not show any signi ficant changes in downstream river temperatures during the period the cooling tower was out of service. This deviation is not expected to have a significant effect on river temperatures.

Corrective Action:

The 'B' cooling tower lif t pump lubricating water filter and flow switch were cleaned and the pump returned to service. Stable lift pump operation was accomplished at 4:25p.m.on8/29/75.

Failure Data:

Envi ronmenta l Deviation Report 50-277/278-75-13 Very truly yours, M.J./ooney Asst. Gen l. Supt.

Generation Division cc: Mr.- James P. 0 8Reilly, Di rector, Region 1 .

Office of Inspection and Enforcement United States Nuclear Regulatory Commission '

631 Park Avenue King of Prussia, PA 19406 l

.