ML19296D179

LER 80-013/03L-0:on 800203,while Maint Was Performed on 2082-K002 Static Inverter,Emergency Control Transfer Switch Was Placed in Emergency Position.Reactor Core Isolation Cooling Was Rendered Inoperable.Caused by Personnel Error

ML19296D179
Person / Time
Site:	Hatch
Issue date:	02/20/1980
From:	Baxley S GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19296D178	List: ML19296D177 ML19296D179
References
LER-80-013-03L-01, LER-80-13-3L-1, NUDOCS 8002290446
Download: ML19296D179 (2)

Text

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[ o 13 j l was placed in the emergency position while maintenance was beinq per- 1 o 4 l formed on 2C82-K002 static inverter. The combination of the switch I o s l position and the failed inverter rendered RCIC inoperative. The l 1016 I I system was not declared inop durinn this period _of time. There was I o 7 l no effect on the environs. This is a non-repetitive event. I lois 1 I 80 I

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44 47 43 CAUSE DESCRIPTION AND CORHECTIVE ACTIONS h i o l The failure to declare the system inoperative was caused by personnel I i i l error. The position of the control transfer switch was changed to 1 i , return the control to the control room. The static inverter was 1

[, 3l l repaired and returned to service which made the remote RCIC controls I f i 141 1 operable. I 7 8 9 80 STA S 'n. POW E R OTHERSTATUS DISCO RY OlSCOVERY DESCHlP TION liIsl l El@ l019 9l@l NA l l l@l Onerator Observation I A TlVITY CO TENT sTE LE Asr D OF HELE ASE AUGUNT OF ACTIVITV LOCATION OF REL E ASE i c L1J @ L7J@ "A I I NA I 7 H 9 10 11 44 45 6J F E H S OW E L f

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NAME Of PREPARFH S. X. Baxley pggyg. 912-367-7781 o

PLAtlT E. I. HAT Q Licensee Event Report R0 Report No. 50-366/1980-13 February 20, 1980 NARRATIVE REPORT On February 3,1980 at 1055 EST, the RCIC systen was discovered to have been inoperative since 0730 EST. The system had not been declared inoperative. The system inoperability was due to the combination of a failed static inverter for the remote shutdown panel and the placement of the emergency transfer control switch to the emergency position. The failed inverter rendered the RCIC controls at the remote shutdown panel inoperative. The emergency control transfer switch transfered control to the inoperable panel controls. The switch had been placed in the emergency position to ailow maintenance personnel to troubleshoot the pro-blem with the static inverter.

Upon discovery of t'ie inoperability of RCIC, the operator returned the emergency control transfer switch to the normal position. Maintenance personnel completed the repair of the static inverter and returned the remote controls to an operable status. There was no effect on normal plant operation. The health and safety of the public was not effected.

A review of the event found no generic problems. HPCI, Core Spray, and ADS were all operable during the event.

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