ML20126B940

Part 21 Rept:On 800116,motor Operated Gate Valve Installed in Test Loop Failed to Close Completely When Actuated Under Operating Conditions.Caused by Inadequate Guiding of Valve Gate.Gate Guides Were Modified & Retested

ML20126B940
Person / Time
Site:	Palo Verde, Catawba, Arkansas Nuclear, Bellefonte, McGuire
Issue date:	02/12/1980
From:	Wheaton W BYRON JACKSON PUMP, EMVBORGN
To:
Shared Package
ML20126B937	List: ML20126B934 ML20126B940
References
REF-PT21-80-197-000 NUDOCS 8003240078
Download: ML20126B940 (2)

Text

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NOTIFICATION REPORT- " *

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Nuclear Regulatory Commicslon PArT hWBER Yarious N/R No. 0001 -_

PA?.T i M E Gate Valve L 3" CUSTOMER Various

.iAh'JFACT13RER Nuclear Valve Div. PRCk1ECT Various

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Borg-k'arner Corp. DATE DEFECT DISCOVERED Jan.16,1980 ( Approx.)

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DESCRIPTION OF NONCONFORMANCE, ANALYSIS OF CONDITION, AND CORRECTIVE ACTION (ATTACM 5ury0x.ING DATA).

Duke at theirPcwerParshal Co., as part of an operability test program, established a test loop Stearu Carol ina. Installed in that Generating Station (non-nuclear) near Charlotte, fdrth operated gate valve. test loop was NYD P/N 74380, a 3",1500f motor During Novetter of 1979 NVD was notified that the subject valve had failed to cor:pletely close when actuated under operating conditions.

The operating conditioris were 2485 psi 8 650*F with a flow rate of 220,000 lbs per hour of steam, which is equivalent to a velocity of approx. 40 ft/sec. Under

-Jiase conditions the valve closed to about 10% of full closure.

Extensive testing and evaluation was conducted by Duke Power Co. in conjunction with NYD to determine the exact cause of the nonconformance so that a proper corrective action could be accornplished. By approxirrately, Jan. 16,1979, it was confirred that the basic cause of the failure was inadequate guiding of the valve Sate.

Continued on Page 2 CtM.NTITY AND LOCATIOk 0F All. SIMILAR ITEMS del!VERED WITHIN TH CONTAIN THE SAME NONC0tJORMANCE.

. Refer to Pa9e 2 4 d a e 2 fx ) a41/ro Director, Quality Assurance Dats /

FORM NO. 400-144 scos u o DSEs

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NOTIFICATION REPORT TO U.S. NUCLEAR REGULATORY C0 MISSION N/R tio. 0001 Page 2 - Continued -

A modification of the gate guides was accorr.plished by NVD and the valve re-tested by Duke Power Co. verifying the adequacy of the corrective action.

NYD understands that Duke Power Co. had made the NRC in their region aware I of the situation and on Feb. 7,1980, the NRC in Region V was notified by telephone by NVD of the situation. This formal notification report is issued to cc:plete NVD's obligation under 10CFR21 with respect to similar valves delivered by NVD. NVD has detemined that a total of thirty-four (34) valves of similar design have been delivered. The portinent data on those valves is listed below. The four (4) Custorners involved have been notified and askeda to represent evaluatesafety substantial if the hazard.

installations of these valves at their sites i NYD is prepared to respond in a time-ly fashion to whatever action the Customers deem necessary. '

It shculd be noted that the valves involved are not all subject to the severe I operating environant encountered in the Duke testing and that under less  ;

severe conditions of pressure, terp. and flow could be expected to perform sa ti s fa c teri ly. l The valves listed belcw have been identified by NVD as having a potential generi: pr:blea related to the Duke test failure described above. All four (4) Cutomrs involved have been notified by telecon as of 2/11/80. e (1) Cas tene r: Combustion Engineering Site: Palo Verde t/

NVD P/N: 77910 Qty :

C.E. Tag No's SI634 and 51609 Four (4)

Valve A P: 2500 psi Temp: 350' F (2) Custo er: T.V.A. Site: Bellefonte HVD P/N: 79190 Qty: Sixteen (16)

TVA Tag No: 35WO456-XC-30 Valve AP: 2500 psi Tenp: 650* F Flow: 100 GPM ( Approx. 4.54 ft/sec)

(3) Custo er: Bechtel Site: Arkansas Nuclear Cne-Unit 2 NVD P/N: 75460 Q:y: Two (2)

Bechtel Tag No's: 3ACA-GT-fD-2C V4698-1-PL 3ACA- GT-MO-2CV4697-2-PL Valve'AP: 2485 psi Temp: 658' F (4) Customr: Duke Power Co. Site: Catawba /

NVD P/N: 74380-1 Qty: Six (6)

Duke Tag No: 9J-239 Valve o P: 2485 psi Temp: 680' F Duke Power Co. Site: McGuire !

NVD P/N: 74380 Oty: Six (6)

Duke Tag No: 9J-221 Valve 6P: 2485 psi Tecp: 680* F

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