ML20085D077

Telecopy Ao:On 730710,circuit Breaker for Containment Cooler Fan 2 Tripped.Caused by Overcurrent Due to Misalignment of Calibr Spring in Overcurrent Trip Device.Spring Realigned

ML20085D077
Person / Time
Site:	Robinson
Issue date:	07/10/1973
From:	Furr B CAROLINA POWER & LIGHT CO.
To:	Oleary J US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20085D064	List: ML20085D062 ML20085D066 ML20085D072 ML20085D077 ML20085D084
References
NUDOCS 8307200324
Download: ML20085D077 (1)

Text

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SUSPECTED DUPLICATE 2-OF0F87E191 ICS IPMMTZZ CSP 8'033321351 MGM TDMT HARTSVILLE S 152 07-10 0340P EST ZIP 20545 0

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-4 IN ACCORDANCE WITH SECTION 6.6.2 0F THE TECHNICAL SPECIFICATIONS THE FOLLOVING ABNORMAL OCCURRENCE IS REPORTED AT 0830 ON JULY C

10 WHILE ROUTINELY PUTTING' CONTAINMENT FOR COOLER NUMBER TWO O

IN SERVICE, THE CIRCUIT BREAKER FOR THIS FAN TRIPPED. I NVESTIGATI ON REVEALED THAT THE TRIP WAS INITIATED BY INSTANTANEOUSLY OVER t.b OCCURRENCE CAUSED BY THE MISALIGNMENT OF THE INSTANTANEOUSLY O

I CALIBRATION SPRING IN THE OVER CURRENT TRIP DEVICE. THE DEVICE L.

WAS REMOVED, THE SPRING REALIGNED AND THE COOLING UNIT PUT IN SERVICE SATISFACTORILY AT 1007. TO PREVENT THE RECURRENCE OF THIS TRIP, ALL NEWLY INSTALLED TRIP DEVICES ARE BEING VISUALLY INSPECTED FOR PROPER SPRING ALIGNMENT. THIS UNIT HAD OPERATED L

SATISFACTORILY FOLLOWING THE INSTALLATION OF THE NEY TRIP DEVICE.

THIS WAS REPORTED TO MR HERB WHITTNER IN PERSON ON JULY 10, 1973.

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