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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$$$*SShEES's SUSPECTED DUPLICATE "7' 73 mestern union u v C U 2-OF0F87E191 ICS IPMMTZZ CSP Q IM i -.x j *******

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. 8'033321351 MGM TDMT HARTSVILLE S 152 07-10 0340P EST l

ZIP 20545 0 50-261 C c} 'b 3 7 ,

JOHN F OLEARY I DIRECTORATE OF LICENSING USAEC ll gJ- -

') .A C WASHINGTON DC 20545 -

JUL131973> -

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h E.S. AT07.*.1C EllIR"Y

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(' $la$ 3 g Nd se:uca CD -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

t. REVEALED THAT THE TRIP WAS INITIATED BY INSTANTANEOUSLY OVER I b OCCURRENCE CAUSED BY THE MISALIGNMENT OF THE INSTANTANEOUSLY O CALIBRATION SPRING IN THE OVER CURRENT TRIP DEVICE. THE DEVICE WAS REMOVED, THE SPRING REALIGNED AND THE COOLING UNIT PUT IN '

L. 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.

l. BENNY J FURR MANAGER H B ROBIt130N SEG PLANT PO BOX 790 HARTSVILLE O SC 29550 l 2041 EST O MGMVSHB WSH lC e lC O C O 2 p.lf (ri 1 -

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