ML19318A091

LER 80-028/03L-0:on 800515,during Performance of Routine Test,Diesel Generator 12 Failed to Reach Rated Speed in Less than 10-s Until Third Attempt.Caused by Intermittent Female Pin & Crack in Bakelite Spacer of Anphenol Connector

ML19318A091
Person / Time
Site:	Calvert Cliffs
Issue date:	06/13/1980
From:	Bauer E, Heibel R BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19318A081	List: ML19318A080 ML19318A091
References
LER-80-028-03L-01, LER-80-28-3L-1, NUDOCS 8006180443
Download: ML19318A091 (2)

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(PLEASE PRINT 0;) TYPE ALL REQUIRED INFO".MATISNI fo ITl8 9l r410 I c l c l NI I l@l 14 15 0101-10101010101- LICENSE NUMBER l o l o l@l 25 411 26 11 11111@l LICENSE TYPE Jo I

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T ,"C U:.j@l0l5l0l010l3l1l7l@l015l115l810l@l0161113I810l@ 68 69 EVENT oATE 74 7% RETORT oATE 80 7 60 81 DOCKET NUM8ER EVENT nESCRIPTION AND PROSABLE CONSEQUENCES h 1

ITT M i Durino the cerforrance of a routine test #12 diesel cenerator (DG) failed to ITT3"I I reach rated speed in less than 10 seconds until the third attemot. The first I o 141 l attenot was at 0300. At 0320 the diesel was left runnino as recuired by F6 Tin i T .S. 3.8.1.1. At 1005 #12 diesel was taken out of service for repairs. The io is i l DG was returned to service at 1600 on 5/15/80. Both offsite AC power sources I o I 7 l 1 and the redundant DG remained operable during the event. This is not a l o is i i repetitive occurrence.

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Co i! ' s*8CioE CouPoNENT CooE sVSSC7[o'Es"NESE l o_L9_) l E l E l@ [E_j@ l A l@ l El Ll El Cl Ol UlO l X l@ LI.J 19 20 7 8 9 10 11 12 13 18

, SE OUENTi AL OCCUR R E NCE RE PC RT REVtsloN EVENT YEAR REPORT NO. CooE TYPE .

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@ ,ago/Ro g la lo I l-l I of 21 81 1/l I ol al LLJ 30 L-l LoJ 32 21 22 23 24 26 27 28 29 31 K N ACTO oN PL NT ME Hour $ $8 i PoR > 8. S PPLIE MANUFA URER I33c l@l34z l@ l3621@ l3621 @ l 01 Ol0 10 I lY l@ l42Nl@ l43Al@ l Al 31 81 C 3J 40 41 44 4 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 11101 l investication revealed an intermittentfemale contact oin and a crack in the bakelite t i 13 i i spacer of the amphenol. connector for the 250 RPti speed switch. It is assumed that li l 2 l Ithis ennnectnr had hann mieh naloa 2+ en-o enint Ti:e e p , c u c..it of the soeed iil3; l switch caused the starting circuit to time out and initiate a start failure and ii i4i Iexciter shutdown sonnanca ST  % power OTHERSTATUS oISCo RY otScoVERY oESCRIPTioN l.LLsJ LEJ@ l il ol nl@l" na i l a l@l ny->+nr nwe- +4c-

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AMOUNT oF ACTivlTY LoCATidN oF RELEASE 1 6 RELEA$t@o IZl of RELE ASEL,2]@l NA I l NA.

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PE " s'C%'A'o' '" @ l l1l9I[Z_j@l NA 7 8 9 10 tS$UE ITTol L @of10l CRIPTroN NA I LllIllIIII11 7 8 9 68 69 i NA'.*E OF PREPARER R. P. Heibel/E. R. %or psoNg: l'401 DFC 47?P/e7 m 9'gg-.- -- ---- ..-- - -- - - . - . _ .

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LER NO. 80-28/3L DOCKET fl0. 50-317 EVEtiT DATE 05/15/80 REPORT DATE 06/13/80 ATTACH"ENT CAUSE DESCRIPTION ArtD CORRECTIVE ACTI0 tis: (C0!1 tit!UED)

The amphenol female plug was replacad, The diesel is tested on a weekly basis and no further action is contemplated.

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