ML20085E425

LER AO-75-27:on 751221,water Lost to Mixing Basin When Cooling Tower Pump a Removed from Svc Resulting in Discharge Temp Rising Above Tech Spec Limit.Caused by Valve Closing Too Slow to Prevent Weir Overflow

ML20085E425
Person / Time
Site:	Palisades
Issue date:	01/05/1976
From:	Sewell R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	Kepper J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
LER-AO-75-27, NUDOCS 8308110438
Download: ML20085E425 (2)

Text

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UCENSEE EVENT REPORT

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CATEGORY TYPE SOURct DOCKETLetR EVENT DATE 6'd REPORT DATE ECON' l

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• l 7 8 Ltj LL_] lo i s 101-1012151 51 1112121117 l 51 1011101517151 57 58 59 SO B1 88 68 74 75 80 EVENT E RPTON

• BS l Wher. the 'A' cooling tower pump was removed from service following plant shutdown. the l 7 89 80

@ l vater lost to the mixing basin caused the temperature at discharge to be h5 5 degrees l 7 89 80

@ l F. The delta-T was 8.h degrees F which is above the Tech Spec limit of 5 degrees F.

7 89 l 80 7

3G8 l Due to the infrequency of occurrence and the negligible impact on environment, a Tech l

@9l Spec Change has been requested to permit short periods of time (continued on Li'ne l 1

skshM Chuk CCot CODE COMPO(/J')

ENT CCOE SLFPLER t cor MANUFACTUNR [/I)

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@ l Hl Fl~ W 7 89 10 11 12 l Vl Al Ll Vl OlPl .

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48 CAUSE DESCRIPTON U7)

@ l The valve closing time is too slow to prevent veir overflow following pump trip. l 8l 00 80 l

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OTH(tRSTATUSut N or STATUS A 2.) (AV B0

% POWER DISCOVERY DSCOVERlDESCRSTON 7 0 9 d 10 l 0l 0l 0l l NA l W l Environmental Monitoring Program l 12 13 44 45 46 80 Rft CF RE AS AMOUNT O CTMTV 7 8 9 W Wl 10 11 NA l l LOCAT NA RELEASE l

44 45 PERSONNEL EXPOSURES - 80 NuMets 2V H I 01 01(01) tv Z C)lotsCRetONh/) NA 7 89 11 12 13 l PERSONNEL INJURIES 80 NUMBE EE l 0l 0lN}2) 7 89 0l lotscRescN(1])

NA 11 12 l

/y o robstble Consequ'3enc)es 80 R l No effect on public health and safety.

7 89 ]

LOSS OR OAMAGE TO FACILITY tres !

8 Lz}r)1ctscRescN 7 89 10 NA 0 6) l PUBLOTY (3 2) 80

'@89[ Copies of this report are being sent to MI news media.

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l 80 ADDITONAL FACTORS (.3 7)

@ l_ vith delta-T above 5 degrees F. (AO-75-27)

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PDR ADOCK 05000255

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Mr. J. G. Keppler US Nuclear Regulatory Comission

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799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255, LICENSE DPR-20 PALISADES PLANT Transmitted attached is a " License Event Report" for the Palisades Plant.

Ralph B. Sewell (Signed)

Ralph B. Sewell Nuclear Licensing Administrator CC: Director of Nuclear Reactor Regulation, USNRC 111 2

' COPY SENT REGION

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