ML19259C199

LER 79-017/03L-0 on 790515:during Overspeed testing,12 Diesel Generator Auxiliary Blowers Failed,Rendering Diesel Inoperative.Caused by Interference Between Lobes of Blower. Blower Returned to Vendor for Rebuilding

ML19259C199
Person / Time
Site:	Calvert Cliffs
Issue date:	06/12/1979
From:	Carroll J, Romney K BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19259C198	List: ML19259C197 ML19259C199
References
LER-79-017-03L-01, LER-79-17-3L-1, NUDOCS 7906140352
Download: ML19259C199 (2)

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lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) l1@l@l o 1 l 7 8 l9 M lLICENSEE D l CCODE { C l N l 1 l@15l010 14 l- NUMdER LICENSE 1010101010 l- 1010 25 26 l@l4 LICENSE TYPEl1 JO 11 5711 CAT- 58 CON'T o

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REPORT DATE EVENT DESCRIPTION AND PROB ABLE CONSECUENCES h f oTTI Louring oerformance of oversoeed testina 12 diesel cenerator auxiliary blower o a 1 failed at 0930 rendering the diesel inocerative. Diesel cenerators 11 and 21 o 4 Iwere tested and assioned to Unit 2 which was coerating at 100% oower. Unit 1 l o s lwas in mode 6 with no core alterations or reactivity changes in progress. At I o e 12330 on 5/15/79 11 diesel cenerator was reassioned to Unit 1 to facilitate fuel I o 7 l movement. UDon ComDletion of Core alteration 11 diesel Cenerator was again assioned l o a I to Unit 2 at 0821 on 5/17/79.12 diesel generator was returned to service at 1430 (CONT)l 7 8 9 80 C DE C E SLBC E CCMPCNENT CODE SuBCC O E SU OCE ol9 l E l E l@ W@ lB l@ l Bl Ll 0l WI El Rl@ l Z l@ [Z_j @

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41 l42 Yl@ l43 Al@ lF l0 l1 l0 Ig 44 47 CAUSE CESCRIPTION AND CORRECTIVE ACTICNS h iio lThe blower failure was caused by an interference develocing between the lobes of I i i i the blower. The bearings were insoected and no deterioration was noted. The I i 2 I blower has been returned to the vendor for rebuilding. If the exact cause of i

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• 7 10 , 68 69 30 g NAME OF PREPARER d. I. Carroll /X. M. Romnev psoys (301) 234-7943/7960 2

DOCKET NO. 50-317 EVENT DATE 05/15/79 REPORT DATE 06/12/79 LER N0'. 79-17/3L ATTACHMENT EVENT DESCRIPTION AND PROBABLE CONSEOUENCES: (CONT) on 5/23/79. This is not a repetitive occurrence.

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