ML20085E485

LER ER-76-025:on 760813,during Semiannual Operational Check of Hydrogen Recombiners,Unit M69B Loaded to 43 Kw,Resulting in Heater Temp Below Tech Spec Limits.Caused by Grounded Heater Phase

ML20085E485
Person / Time
Site:	Palisades
Issue date:	09/09/1976
From:	Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
LER-ER-76-025, LER-ER-76-25, NUDOCS 8308120254
Download: ML20085E485 (2)

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Q Q UCENSEE EVENT REPORT CONTROL BLOCK:{l l l l l l [M. EASE PRINT ALL RSdBUutED W8PORGAATION) )

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O lMl Tl Pl A lLl1l l 0l 0l-l 0l 0l 0l 0l 0 l-l 0l 0l l h l 1 l1l 1l 1l l0l3l 32 7 89 14 15 25 28 30 31 TYPE UA1C 00Cx(T NU 9ER EVENT CATE REPORT DATE O CONT l l l [LJ l,JJ l0 l 5 l 01-10 l215 l51 lo 18 l1 l 317 l 746l lo7519 l0l 9l 71 61 80 7 8 57 58 59 80 8* 88 89 EVENT DESCRIPTION gg l While verforming the semiannual operational check of the two hydrogen recombiners, l 7 89 80

@ l Unit "69B could only be loaded to h3 kW and the resulting heater temperature was l 7 a9 80

$ l 170 F below the tennerature reouired by Technical Snecification h.2.2.12.b.h l 7 d9 80 SE l (1200 F). The heater met the requirements of the six month test but vould not meet l go 7 89 BE I the recuirements of the 18-month test. The unit is considered inoperable. (ER-76-29) 7 89 ,,,,, 80 C DE COMPONENT CODE P! W1ATON ME l Sl El ]

7 89 10 11 lR lEl Cl 0] MlBl 12 17

@43 44 lW l1 l 2 l 0l 47

{48 CAUSE DESCRIPTION DE l '"he ureliminary inspection indicates that one phase of the heater is grounded. A l 7 89 80

@ l detailed investication vill be made at the next plant cold shutdown. In addition l 7 89 80 3 l tc the 1005 redundant recombiner unit the containment purge system is (see Line 18) l 7 89 S  % POWER OTHER STATUS OE OSCOVERY DESCAPTON 1 [Ej l0l 9l 9l l NA l [b_] l NA l 7 8 9 10 12 13 44 45 46 80 aYtE54 [o AuouNT os ACTmTv LoCAfos os nELEASE E0 W Es l,,ZJ$UISE l NA l l NA l 7 8 9 10 11 44 45 80 IEASONNEL EXPOSURES NUMBE A TYPE DESCApicN

]E l Cl 0 l 0 l 7 89 11 Wl12 13 NA 80 l'

PERSONNEL INJURIES NUMBER DESCASTON 3E I ol O l 01 1 NA l 7 89 11 12 80 PROBABLE CONSEQUENCES gg l None - Redundant systems are available. l 7 89 80 LOSS OR DAMAGE TO FACIUTY TYPE DESCAFTON g] ] l NA l 7 89 10 80 PUBLOTY gg l None l 7 89 80 ADDITIONAL FACTORS g l (Contd From Line 10) available. Either system is capable of maintaining H,3 belov l 7 89 80 gg l the combustible limit during post LOCA conditions. l 7 89

8308120254 760909 l PDR ADOCK 05000255 l S PDR

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4 i Consumers f 5 Power

% f Company General Offices: 212 West Michigan Avenue. Jackson, Michigan 49201. Area Code 517788-0560 September 10, 1976

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Mr James G. Keppler

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Office of Inspection & Enforcement # w # f s,ac.

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US Nuclear Regulatory Ccemission 4k(,h 799 Roosevelt Road N /p';':7' '(3 Glen Ellyn, IL 60137 DOCKET 50-255, LICENSE DPR-20 PALISADES PLANT, ER-76-25 HYDROGEN RECOMBINER Attached is a reportable event related to the Palisades Plant. This event has been classified as a condition leading to operation in a degraded mode.

David A. Bixel (Signed)

David A. Bixel Assistant Nuclear Licensing Administrator 9419 copy SENT REGIOR

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