ML19341B675

LER 80-080/03L-0:on 801225,w/pressure Vessel Head Removed for Refueling,Operating B Train RHR Became Inoperable When Loop Suction Valve Closed.Caused by Signal from Pressure Transmitter Loop.Valve Reopened

ML19341B675
Person / Time
Site:	Farley
Issue date:	01/28/1981
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19341B674	List: ML19341B673 ML19341B675
References
LER-80-080-03L, LER-80-80-3L, NUDOCS 8102030618
Download: ML19341B675 (1)

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LICENSEE EVENT REPORT CONTROL BLOCK: l l l l ljh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) h2 1 A l L l J l M l F l 1 l@l O! 0l -l 0 l 0 l 0 l c l 0 l - l 0 l l0 l@

7 8 9 LICENSEE Coot 14 15 uCENSE NUMBER 25 26 UCENSE TYPE 40 57 CA 7 66 lh 4 l 1 CON'T M " ,"'

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80 I 8 60 Si ooCEET NUMB ER 68 69 EVENT oATC 74 75 RE70RToATE i

EVENT DESCRIPTION AND PRO 8ABLE CONSEQUENCES h Io 121 l At 2350 on 12/25/80, with the pressure vessel head removed for refueling, the loop

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l ro6 T31 I suction valve for B train RHR closed which resulted in the operating 3 train RHR be- l l coming ino,erable. Tech. Spec. 3.9.8 requires at least one RHR loop to be in operationj g l Tech. Spec. 3.9.8 action statement requirements were met. Health / safety of the public g o a l were not affected by this occurrence. l IIIIIII I l o a l I 7 ss so Ee" To$E susCi$a coucousNT coes sus $Eo's sSEs o s I ci vl@ Ld@ Lxj@ I v l A l L I V I E l X lh [E_jh [p_l h 7 8 9 to 11 12 13 18 19 20 stoutNTIAL Occur RENCE REPoRr REvissON LER EVENTYEAR REPORT NO. CooE TYPE No.

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35 36 40 el 42 43 44 47 CAuSE DESCRIPTION AND CORRECTIVE ACTIONS h l110 I I The suction valve was closed by a sinnal from the reactor coolant system pressure I

[LLi,) I transmitter loop. The looo was being de-terminated from its electrical penetr:ition whild L' 1.2_j l energized in order to repair the penetration when the instrument leads were inadver- l

@ l tently shorted resulting in the closing signal. The valve was reopened and RHR pump - l gl 1B was returned to service at 2355 on 12/25/80.

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