ML20085E476

LER ER-76-026:on 760817,cooling Water Basin Level Increased More Rapidly than Expected During Determination of Effect of Dilution Water Flow on Plant Output.Test Procedure Revised to Accommodate Level Increase

ML20085E476
Person / Time
Site:	Palisades
Issue date:	08/31/1976
From:	Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20085E478	List: ML20085E476 ML20085E480
References
LER-ER-76-026, LER-ER-76-26, NUDOCS 8308120249
Download: ML20085E476 (2)

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O UCENSEE EVENT REPORT Palisades CONTROL SLOCK:l l l l l l l (MEASA pneff ALL ASSUNISD MBI'OltAAATIOmi) 1 8 UCENSE NUM8ER TYPE O l MlIl pl A lL l1l l0 l 0 l-l 0 l 0l 0l 0 l 0 l-l0 l 0 l l h l 1 l 1l1l 1l 30 l0l1l 32 7 89 14 15 25 28 31 OOCKET NUM8ER EVENT DATE REPORT DATE O CONT l

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• l [L_j l 0 l 5 l 0l-l 0 l 21515 l l0 l8 l1l Tl 7l 6l l 0 l 813 l1l7 l6 l 7 8 57 58 59 80 81 88 89 74 75 80 EVENT DESCRIPTION DG lDuring a test to determine the effect of diverting dilution water flow (to the main l 7 89 80 32 l condenser) on riant outuut the level in the cooling tower basin increased more l 7 89 80 3E l rapidly than expected. Readjustment of the CT pump discharge valve to terminate l 7 89 80 DE lthis increase resulted in a closed cycle condenser cooling system discharge temper-_j 7 89 80

@ l ature maximum of 6.6 F and a discharge time, over the allovable 5 F limit, of about l 7 89 min e. 80 (ER-76-26)

CODE CODE COMPONENT CODE SUPPLER MANUFACTUNR VOLATION BE lH l F l W 7 89 10 11 12 l Zl Zl Zl Zl Z l Zl 17 W43 l Z l 9l 9l 9l 44 47

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48 CAUSE DESCRIPTION gg l Based on calculations provided by the A-E, a rapid rise in the CT basin level was l 7 89 80 SE lnot exrected. The test procedure was revised to accommodate this change and rea- l 7 89 80 QE l sonably good control was achieved. l 5  % POWER OTHER STATUS 06C VE OSCOVERY DESCRIPTON h 1 l1l Ol 0l l NA l @ l NA l 7 8 9 10 12 13 44 45 48 80 EL OF LE SE AMOUNT OF ACTMTY LOCATON OF RELEASE WE 7 8 9 Lz_1 WI 10 11 NA l 44 l

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PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTON DE 1010101 Lz_] l NA l 7 89 11 12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTON EE 1010101 1 NA l l 7 89 11 12 30 j PROBABLE CONSEQUENCES 3G Fone; NPDES per=it levels were not exceeded. l

7 89 80 LOSS OR OAMAGE TO FACIUTY TYPE DESCRIPTON D2 l Zj l NA l 7 89 10 80 PU8LICITY DE l None. l 7 89 80 l ADDITIONAL FACTORS DE I Au l

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s o.n rai ome.s: 212 West wchigan Avenue, Jackson, Wchigan 492 e Area Code 017 788-OSSO [ 8/C  % g August 31, 1976 ,

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• fG Mr James G. Keppler Office of Inspection & Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255, LICENSE DPR PALISADES PLANT ER-76 PLANT DISCHARGE TEMPERATURE Attached is a reportable occitrrence which relates to the Palisades Plant.

at/C6b $ A h h /3 I David A. Bixel Assistant Nuclear Licensing Administrator

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/ r QGG l COPY SENT REGION /N SEP 3 1976 )