05000315/LER-1985-019, :on 850420,ice Inventory within Ice Condenser Determined to Be Below Tech Spec Limits.Cause Unknown.Ice Weight of Deficient Rows Increased by Ice Replenishment Program

:on 850420,ice Inventory within Ice Condenser Determined to Be Below Tech Spec Limits.Cause Unknown.Ice Weight of Deficient Rows Increased by Ice Replenishment Program

ML20133C981
Person / Time
Site:	Cook
Issue date:	10/01/1985
From:	Blind A INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML20133C971	List: 05000315/LER-1985-017, :on 850417,accumulated Leakage Exceeded Tech Spec Limits Found While Performing Type B & C Leak Rate Tests.Cause Unknown.Penetrations Repaired 05000315/LER-1985-019, :on 850420,ice Inventory within Ice Condenser Determined to Be Below Tech Spec Limits.Cause Unknown.Ice Weight of Deficient Rows Increased by Ice Replenishment Program ML20133C966
References
LER-85-019, LER-85-19, NUDOCS 8510070552
Download: ML20133C981 (2)

LER-1985-019, on 850420,ice Inventory within Ice Condenser Determined to Be Below Tech Spec Limits.Cause Unknown.Ice Weight of Deficient Rows Increased by Ice Replenishment Program

Event date:
Report date:
3151985019R00 - NRC Website

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. NRC Pere 388 APPSIOvED OMe NO 3150-4104 LICENSEE EVENT REPO5tT (LER)

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.T R ACT a.-r R, r x,,--....,,,e..-e., ~,ye.,-e e,0 e., o.i THIS IS A PEVISION 70 LER 85-019 SUEMI'lTED ON MAY 13, 1985.

01 APRIL 20, 1985, KHIIE IN MODE 5 (00ID SHU7DOWN), THE ICE INVENIORY WITHIN THE ICE CONDENSER NAS DEIERMINED TO BE wrN THE LIMITING CX)NDITION FOR OPERATION AS

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STATED IN TECHNICAL SPECIFICATION 3.6.5.1.d.

THE SURVEILINCE REQUIPH4ENT STIPUIATING THE MINIMUM AVERAGE ICE NEIGff OF THE SAMPLE BASKEIS FROM EACH PON/ GROUP COULD NOT BE SATISFIED.

4 THE ICE KEIGHT OF THE DEFICIENT ROWS WAS ItCREASED BY AN EXTENSIVE ICE PEPLENISHMENT PROGRAM. THIS WEIGHT INCREASE BROUGHT THE RON/ GROUP AVERAGES WELL WITHIN TErHNICAL SPECIFICATION LIMITS AND SHOUID AISO INSURE ACCEPTABLE ICE BASKEr hI:IGHTS AT THE NEXT SCHEDULED SURVETT.TANCE.

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na D.C. COOK PLANT, UNIT 1 o [s to jo lo l 3l1l5 8l 5 0l1l9 0 [1 0l 2 0F 0l2 T!!IS IS A REVISION 70 LER 85-019 SLTMITTED ON MAY 13, 1985.

ON APRIL 20, 1985, hlIILE IN MODE 5 (COLD SHUTDOWN), 'HE ICE INVENTORY WI'I11IN TIE ICE CONDENSER (IEEE COMPONENT FUNCTIG4 IDENTIFIER = COND) WAS DETERMINED TO BE BEIOW THE LIMITING CONDITION FOR OPERATION AS STATED IN TECliNICAL SPECIFICA'" ION 3.6.5.1.d.

THE SURVEILLANCE RECUIRDIENT STIPUIATING TIE MINIMUM AVERAGE ICE hEIGff OF TIE SAMPLE BASKEIS FROM EACH BOW / GROUP COULD NCTf BE SATISFIED (TECl!NICAL SPECIFICATION 4.6.5.1.b.2, PARAGRAPH 2).

THE FOLIOWING FIVE POW / GROUP AVERAGES WERE FOUND DEFICIENT; 6-3, 8-2, 8-3, 9-2 AND 9-3.

IIISTORICALLY, TIE ICE BASITIS IDCATED IN TIESE ROhS (6, 8 AND 9) HAVE EXPERIENCED NNFRATED ICE IDSSES DUE 'IO SUBLIMATION AND SUBSEQUENT ICE MIGRATION.

TEE ICE NEIGff OF TifE DEFICIENT ROWS WAS INCREASED BY AN EXTENSIVE ICE REPLENISHMENT PROGRAM. 'IEIS PROGRAM INVOLVED TIE COMPIEIE EMPTYING AND REFILLING OF THE 720 ACCESSIBLE ICE BASITIS IN TIIE THREE RADIAL ROWS.' ' HIE INAOCESSIBLE BASKEIS ARE IOCATED UNDER Ti!E ICE BED SUPPORP STRUCIURE AND COUID NOT BE REPLENISHED. TIIE BASITIS THAT COUID TUr BE REFILLED INCLUDE ALL AXIAL POSITION 5 IN ROWS 6, 8 AND 9.

TIE REFTTLTNG YIELDED AN AVERAGE NEP ICE ADDITION OF APPROXIMATELY 235 POUNDS PER BASKET. THIS SUBSTANTIAL WEIGrr INCREASE BROUGIT THE SUBJECT RCW/ GROUP AVEPAGES NELL WITIIIN TECHNICAL SPECIFICATION LIMITS AND SIlOUID INSURE ACCEPTABLE ICE BASKET WEIGITS AT TIE NEXT SCHEDULED SURVEILLANCE.

PREVIOUS OCEURRENCES OF A SIMIIAR NATURE HERE REPORTED IN LERS: 50-315/83-73, 50-315/82-72, 50-316/83-59, 50-316/82-116, 50-316/82-25, AND 50-316/84-04.

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