ML19274E786

LER 79-039/03L-0 on 790325:during Normal Operation,Power Supply to Hydrogen Recombiner Deenergized & Recombiner Inoperable for 10-h.Unit 2 Emergency Bus Degraded Voltage Protection Modified & Reenergized

ML19274E786
Person / Time
Site:	North Anna
Issue date:	04/19/1979
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19274E784	List: ML19274E783 ML19274E786 ML19274E789
References
LER-79-039-03L, LER-79-39-3L, NUDOCS 7904240411
Download: ML19274E786 (1)

Text

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DAT E i 8 60 61 OOC A E T N UMO L H EVENT DESCRIPTION AND PROGABLE CONSEQUENCES h

___j o 2 [During normal power operations, the power supply to the Unit 2 post DBA Hydtngon go]3i lRecombiner was deenergized. This action rendered the Hydrogen Recombiner. 2-HC-HC-1. I O 4 [ inoperable for ten hours. This event did not jeopardize the health and safety _of tho I lO is i [ general public since the Unit 1 Hydrogen Recombiner,1-HC-HC-1 was still available. I Io in l l Reportable pursuant to T.S. 6.9.1.9.b. I l

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_/1 95UB. FPLI MA FA T EH TAKEP Af 71 i O*J PL A T 1 ( HOUHS S 6 ITT D F X l@ll_J@ L.LJ@ L2J@ 10 10 o Io l_nJ O l_nJ @ la_J@ wI 11 ? I 47118 3J 34 35 30 3/ 40 41 42 43 44 CAUSE DESCRIPTIGN AND CORRECTIVE ACTIONS i o [Necessary modifications to the Unit 2 Emergency Bus Deoraded Voltage Protection Svstom I ti li l required the comrlete deenergization of the 2H 4160 volt bus and thornfnen thn opn uniti il i7; [ bus which supplies power to 2-HC-HC-1. As soon as the work was complete. the Unit ? I ii ;3l l Emergency Bus was reenergized. I i 4 l 1 __

80 1 8 9 ST >S  % POWEH OTHE R STATUS ISC DISCOVEHY DESCRIPTION 1 5 [f j@ l 0 l 9 l 8 l@ NA l [lLJ@l 00nrator Ohsorvatinn 1 ACT IVI T Y CONTENT HELEASED OF HELE ASE AMOUNT OF ACTIVITY LOCATION OF HE L E ASE i c [L] @ [_zj@l na l I e i 7 8 9 10 11 44 45 80 PE RSONNE L E xPoSURE S NUVHtH TVPF Of SCHIPTION "A I i i 101010 l@L7]@l"

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ESCHIPTION 240 % .

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[.fL [@l NA I IIIIIIIIIIIIIi 7 8 9 10 68 69 80 5 W. R. Cartwright psoNe: 701-8q4-51s1 2, NAME of PREPAftEft