ML19330B851

Part 21 Rept Re Possibility That in Worst Case Tolerance Buildup Condition,Gate Could Disengage from Guide When Valve Is in Backseat Position.Stem Extension Bushing Designed to Interface Between Stem & Backseat

ML19330B851
Person / Time
Site:	Catawba
Issue date:	07/22/1980
From:	Wheaton W BYRON JACKSON PUMP
To:
References
REF-PT21-80-260-000 NUDOCS 8008070071
Download: ML19330B851 (3)

Text

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CENTRALFILES 016 LPDR CENTPAL FILES SS-396 CENTRAL FILES (GRON) TEPA PDR AL -  : LPDR LPDR TEPA TERA ACTION:

PRELIMINARY EVALUATION OF THE ATTACHED REPORT INDICATES LEAD RESPONSIBILIT( FOR FOLLOWUP AS SK)WN BELOW: .

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FFMSI REV:7/9/80

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'Jiuclear Valve Division pment ilorg-Witner Corporation 7500 Tyrone Ave.. V:n Nuys. Californb 91409. T;Iephone:213-781-4 @ 0

, Mailing Address: P.O. Box 2185. V;n Nuys, California

• TWX 910-495-1726 Q.80 188/WRW 30 M ~D 0 July 22, 1980 Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Comission Washington, D.C. 20555

Subject:

Notifiction Under Rules of 10CFR21

Reference:

Notification Report Number 0003 Dear Sir; '

Enclosed are three (3) copies of referenced notification report, as required by paragraph 21.21(b)(2) of 10CFR21. The original has been sent to the Director of Region V. The responsible officer at NVD, Mr.

C.A. Dotter, President and General Manager was notified by interoffice memo on 7/21/80.

If additional information is required do not hesitate to contact the undersigned at your convenience.

Respectfully, BORG WARNER CORPORATION Nuclear Valve Division Wbh j W.R. Wheaton l Director, Quality Assurance ,

(213) 781-4000 Ext. 232/233 i l

WRW/jeh cc: QA Files (3) l l

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-y Nuclear Valva Division se o.wsn.r corporan*a og 7500Tyrone Ave Van Nuys Canfernia91409 NOTIFICATION REPORT to Nuclear Regulatory Commission PART NUMBER Various (See Addendum) N/R No. 0003

. PART NAME 6" Gate Vaive . CUSTOMERS TVA & Duke Power MANUFACTURER Nuclear' Valve Div., PROJECT Hartsville A, Unit 1 & Catawba Bore-Warner Corp. DATE DEFECT

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DISCOVERED July 7, 1980 DESCRIPTION OF NONCONFORMANCE, ANALYSIS OF CONDITION, AND CORRECTIVE ACTION (ATTACHSUPPORTINGDATA).

A~ possibility exists that in a " worst case" tolerance buildup condition, the gate. could disengage. from the guide when valve is in the backseat position. -

A stem extension bushing has been designed and machined that  !

will interface between the stem and the backseat. When installed, it will prevent any possiblity of disengagement of the gate from the guide.

A modification procedure has been written. Valves will be modified in the field. All new valves will incorporate a changed gate guide location to prevent recurrence.

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QUANTITY AND LOCATION OF ALL SIMILAR ITEMS DELIVERED WITHIN THE U.S.A. THAT CONTAIN THE SAME NONCONFORMANCE.

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y-SEE ADDENDUM ATTACHED TO THIS REPCRT. ,

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' 7 M- 10 Director, Quality Assurance Date i

FORM NO. 400-144

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ADDENDUM TO NRC NOTIFICATION REPORT NUMBER 0003 PART NO. QTY. SERIAL NO. MARK / ITEM N0. CUSTOMER PROJECT 401KBB3-002 1 28644 , P44-FF004 T.V.A. Ilartsville A, Unit 1 402KBB3-002 1 35751 'E12-F-026A T.V.A. Ilartsville A Unit I 401KBC4-001 2 35557 20-396 Duke Pwr. Catawba 35558 401KBC3-001 10 31755 thru ,20-393 Duke Pwr. Catawba 31764

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