ML19345D866

Forwards LER 80-027/01T-0

ML19345D866
Person / Time
Site:	Peach Bottom
Issue date:	12/09/1980
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19345D867	List: ML19345D866 ML19345D871
References
NUDOCS 8012170633
Download: ML19345D866 (2)

Text

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!. PHILAD EL,1HIA ELECTRIC COMPANY l

2301 M ARKET STREET

) P.O. EOX 8699 PHILADELPHI A, PA.19I01

.l 121584941 4 000

Decamber 9, 1980 i

cir . Soyce n. (s.ier, Director .  !

Of fice of Inspection and En fo rc ement l Region T i

US Nuclear Regulatory Commission

] 631 Park Avenue j {ing of Prussia, PA 19406

SUBJECT:

LICENSEE EVENT REPORT NARRATIVE DESCRIPTION 4

Dear Mr. Grier:

The following occurrence was reported to Mr. Cowgill, Region  :'

l I, Office of Inspection and Enforcement on November 24, 1980.

Reference:

Docket No. 50-278 Report No.: 3-80-27/IT Report Date: December 9, 1980 Occurrence Date: November 24, 1980 j Facility:

• Peach Bottom Atomic Power Station RD #1, Delta, PA 17314 Technical Soecification Referenca? +

Technical Specification 3 5.C.1 states that "the HPCI

Subsystem shall be operable whenever there is~ irradiated fuel in i

the reactor vessel, reactor pressure is dreater than 105 psia, and prior to reactor startup from a Cold Condition, except as specified'in 3 5.C.2 and 3 5.C.3 below." s Description of the Event:

On November 24, 1980, during HPCI Surveillance Test 6.5, HPCI steam supply valve MO-3-23-14 continued to drive in the closed direction causing the valve fuses to blow. The Unit 3 HPCI.was inoperable for approximately one half hour until the fuses were replaced. During this time, all other ECCS systems were operable. The HPCI valve closing torque switch was inspected, b A,"o so nno $33  ?

Pa r, e 2 i

readjusted, and the valve was stroked satisfactorily. Dur;ng

, testing on December 1, 1980, the valve did not fully clos 2.

Later attempts to stroke the valve were successful. The valve operator and valve were disassembled, inspected, and reassenbled on December 5, 1980. Ho conditions were found which could have caused the v alve to operate improperly. Due to minor scratches, the valve stem and stem packing were replaced.

Probable Consequences of the Occurrence:

The motor operated valve, which is noraally closed, opens on an automatic initiation signal. At no time did the valve fail to operate in the open direction except during the short period on November 24, 1980, when the valve fuses blev. Flh e n der ?du tal.e ve m acts . existed, all ECCS systems and tne RCIC system were either kr.o wn to be oper able or were tested i, o verify operability. Additionally, operation o f this valve is nou equired for containment isolation.

Eause of the Event The cause of this occurrecce is believed to have been improper adjustment of the valve closing torque switch.

Corrective Action:

The immediate corrective action was the adjustment of the torque switch and valve testing. After the valve failed to close during subsequent testing, it was disassembled, and tested as described above.

Very truly yours.

/ .n .

!' j' j/ /,'lc,'::Ag,(

'M.;J. Coone/J Superintendent

, Generation Division - Nuclear Attachment cc: Director, NRC - Of fice of Inspection and Enforcement Mr. Norman M. Haller, NRC - Office of Management &

Program Analysis g**D

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