ML20004F141

LER 81-003/01T-0:on 810526,steam Generator 2A Blowdown Sample Isolation Valve Failed to Close Upon Actuation.Caused by Excessive Stem to Packing Friction Due to Dried Out Packing.Packing Gland Adjusted & Valve Stem Lubricated

ML20004F141
Person / Time
Site:	Point Beach
Issue date:	06/04/1981
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20004F136	List: ML20004F135 ML20004F141
References
LER-81-003-01T, LER-81-3-1T, NUDOCS 8106160548
Download: ML20004F141 (2)

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U. S. NUCLEA'1 CEiULATCY COMMISSION (7 77)

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69 0 l EVENT 512oATE l 6 l 8 l 741 l@l 3 uRCE 75 REPORT oATE 80 7 8 EVENT DESCRIPTION AND PROGA8LE CONSEOUENCES h o 2 lDuring normal operations at 1250 hours0.0145 days <br />0.347 hours <br />0.00207 weeks <br />4.75625e-4 months <br /> , on May 26, 1981, attempts to I g o ,3 l l cycle 2A steam generator blowdown sample isolation valve, 2CV-20 8 3, we re l io g4; lunsuccess ful. Failure of 2CV-2083 to close when actuated is a technicall l o I s l lviolation of containment integrity as defined in T. S. 15.1.d. This l o s loccurrence is reportable in accordance with T. S.

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 Fi l o t IFailure of 2CV-2083 to close upon actuation was due to excessive stem tol i i packing friction resulting from dried out packina. Followina disecve w I g jof the probi.em the packing gland was adjusted and the valve stem was I g l1ubricated. The valve was tested satisfactorily and returned to I ii i,i l operation at 1330 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.06065e-4 months <br /> on May 26, 1981. At no time was the public l safety endangered. m 7 8 9

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NAME OF PREPARER C. W. Fay PHONE: 414/277-2811 {

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ATTACHMENT TO LICENSEE SVENT REPORT NO. 81-O'13/O lT-0 Wisconsin Electric Power Company Point Beach Nuclear Plant Unit 2 Docket No. 50-301 i

At 1250 hours0.0145 days <br />0.347 hours <br />0.00207 weeks <br />4.75625e-4 months <br /> on May 26, 1981, during normal power operation, Unit 2, "A" steam generator blowdown sample valve , 2CV-20 8 3, failed to close upon a manual remote signal from the control operator. The attempt to close 2CV-2083 was at the request of Chemistry Group personnel to stroke the valve. Valve 2CV-2083 is an air-operated containment isolation valve which is required to close automatically upon actuation of containment isolation. Inoperability of 2CV-2083 is a technical violation of containment integrity as defined in Technical Specification 15.1.d. This occurrence is reportable in accordance with Technical Specification 15.6.9.2. A.2 as operating in a less conservative manner than the limiting condition of operation specified in Technical Specification 15.3.6.A.a.

After an immediate investigation it was found that 2CV-2083 failed to close due to excessive stem to packing friction resulting from dried out packing. The packing was adjusted and the valve stem lubricated. Following a satis-factory operational' test on 2CV-2083, it was returned to an operable status at 1330 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.06065e-4 months <br /> on May 26, 1981. . .

The automatic containment isolation function of 2CV-20 83 was installed, in accordance with NUREG-0578, -

during the Unit 2 refueling outage ending on May 22, 1981.

The last operability test of 2CV-2083 was conducted on May 13, 1981, with satisfactory results. If containment isolation was initiated while 2CV-2083 was inoperable, isolation could be provided via accessible manual valves downstream of 2CV-208 3. At no time was the public safety endangered.

The nameplate data for 2CV-2083 is as follows:

Manufacturer: Copes Vulcan Body Size: 3/4" Pressure Rating: 600 psig Type: D-100-60

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