ML20085F532

Telecopy AO AO-74-24:on 741019 Outlet & Inlet Water Ph Difference Exceeded Allowable Limit.Cooling Tower a Acid Injection Sys Left on When Cooling Tower a Circulating Pump E-30A Shut Off,So Ph Depressed in Discharge Effluents

ML20085F532
Person / Time
Site:	Palisades
Issue date:	10/21/1974
From:	De Witt R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	Cook R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20085F531	List: ML20085F529 ML20085F532
References
NUDOCS 8308220411
Download: ML20085F532 (4)

Text

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r VEC235(17t t)(1-832885C294)PD 18/21/74 1654 19MOCT21 PM 1,: M TLX CONS 0WER_JXN ,gg _ ,

USPECTED DUPL 3 M D i"dN,$I"A"I M y m .<3Jh[ ,

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799 ROOSEVELT ROAD a I -

GLEN ELLYN, IL ATT: RON COOK b" ,

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THIS'IS A FOLLOW-UP OF THE PHONE CONVERSATION WITH MR FISHER .

ON 10 74 CONCERNING A0-74-24 THE GREATER THAN 8.5 PH UNITS DIFFERENCE NETWEEN THE LAME INLET AND LAXE OUTLET CIRCULATING .-

WATER, 8308220411 74tiig I'DR ADOCK 05000255 PDR -

ON 18 74 THE OUTLET ENVIRONMENTAL WATER. - PLANT OUTLET - p

\ SAMPLE ANALYSIS HAD A PH OF 7.65. THE INLET ENVIRONMENTAL WATER - , ,

SF.1201 (R5-69) -

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' western union Tele ra'm PLANT LAKE INLET - SAMPLE SHOWED A PH OF 8.38. INDICATING A DIF-FERENCE OF 0.7 PH UNITS. THIS IS GREATER THAN THE 4.5 PH UNITS ALLOWED BY TECH SPEC 3.9.9 IN THE WATER PRIOR TO RELEASE To LAXE MICHIG AN .

THE CAUSE OF THE VARIATION WAS AS FOLLOWS ON 10-18-74 AT 1938 HOURS THE "A" COOLING TOWER CIRCULATING PUMP-E-384- WAS SHUT OFF. THE "A" COOLING T0WER ACID INJECTION SYSTEM

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WAS LEFT ON. THE BLOWDOWN FROM THIS TOWER RESULTED IN DEPRESSING

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THE PH IN THE DISCHARGE EFFLIENTS 8.7 PH UNITS BELOW THE LAKE IN-

, FLUENT PM. THE TOWER ACID SYSTEM WAS SHUT OFF ON 10-19-74 AT 8915.

THE COOLING TOWER BLOWDOWN WAS SECIRED. 2598 POUNDS OF s LIME WAS ADDED TO THE "A" COOLING TOWER BASIN TO RAISE THE PH. '

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• Tele ra'm i TO PREVENT A REOCCURRENCE TE COOLING T0WER ACID INJECTION SYSTEMS WILL BE INTERLOCMED WITH THE C00 LING' TOWER CIRCULATING WATER PMPS S0 THAT THE ACID SYSTEM FOR EACH TOWER CANOT BE -

OPERATED WHILE ITS CIRCULATING PUMP IS OFF. THIS ACTION WILL BE

( T AMEN AFTER APPROPRIATE REVIEWS AND APPROVALS HAVE BEEN MADE. .

, R R DE WITY PALISADES PLANT ~

CONSUMERS POWER COMPANY ALL H0 CC R L HAUETER

) R 3 SEWELL er-initu o

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