ML20063L116

Final Deficiency Rept Re Leakage of Anchor-Darling 3-inch Check Valve Past Seat Due to Factory Omission of Tack Weld on Set Screw.Initially Reported on 820622.Set Screw Will Be Staked in Place of Tack Weld

ML20063L116
Person / Time
Site:	Palo Verde
Issue date:	08/20/1982
From:	Van Brunt E, Vanbrunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, ANPP-21663-GHD, DER-82-33, NUDOCS 8209080638
Download: ML20063L116 (3)

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Nos. 50-528/529/530 Lc 50.55(e) Report .pg pg

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STA. 3001 P.o. Box 21666 -

PHOENIX. ARIZONA 85036 August 20,,1982 ANPP-21663-CHD/BSK U. S. Nuclear Regulatory Commission Region V LCreekside Oaks Office Park 1450 Maria Lane --Suite 210 Walnut Creek, California 94596-5368 Attention: Mr. T. W. Bishop,-Chief Reactor Construction Project Branch

Subject:

Final Report - DER 82-33 A 50.55(e) Report Relating to Anchor-Darling 3" Check Valve Leakage Past Seat Due to Factory Omission of Tack Weld on Setscrew.

File: 82-019-026 D.4.33.2

Reference:

(A) Telephone Converstation between J. Eckhardt and G. Duckworth on June 22, 1982 (B) ANPP-21448, dated July 22, 1982 (Interim Report)

Dear Sir:

Attached, is our final written report of the deficiency referenced above, which has been determined to be Not Reportable under the requirements of 10CFR50.55(e).

Very truly yours, EE.das % des E. E. Van Brunt, Jr.

APS Vice President Nuclear Projects ANPP Project Director EEVBJr/GHD:db [jj l Attahcment i m cc: See Attached Page 2 $ ~7 W 3

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U. S. Nuclear Regulatory Commission August 20, 1982 Attention: Mr. T. W. Bishop, Chief ANPP-21663-GHD/BSK Page 2 cc: Richard DeYoung, Director Office of Inspection and Enforcement

- U. S. Nuclear Regulatory Commission Washington, D. C. 20555 T. G. Woods, Jr.

J. A. Roedel D. B. Fasnacht j G. C. Andognini ,

A. C. Rogers l B. S. Kaplan l W. E. Ide .

J. Vorces l J. A. Brand .

A. C. Gehr l W. J. Stubblefield W. G. Bingham R. L. Patterson ,

R. W. Welcher j R. M. Grant j D. R. Hawkinson L. E. Vorderbrueggen j i

G. A. Fiorelli Lynne Bernabei, Esq.

Harmon & Weiss '

1725 "I" Street, NW ' . ,

Suite 506 i Washington, D. C. 20006 l I

R. L. Greenfield Assistant Attorney General Bataan Memorial Building Santa Fe, New Mexico 87503

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FINAL REPORT - DER 82-33 DEFICIENCY EVALUATION 50.55(e)

ARIZONA PUBLIC SERVICE COMPANY (APS)

PVNGS UNIT 1 I. DESCRIPTION OF DEFICIENCY During startup testing an Anchor Darling-Valve Company 3" Swing Check Valve, PVNGS Tag No. IPIAEV-073,which is located inside the Containment Building and provides isolation of the Instrument Air System header supplying utility air stations, was disassembled to correct a leaking condition. Upon disassembly,it was found that the valve pin set screw (PC-14).was not tack welded per the vendor drawing. This condition would allow the valve pin _to become dis-lodged, thereby causing the valve to become completely non-operative.

Further checking by Bechtel Construction of similar Anchor Darling valves indicate that this condition is limited to the single case.

II. ANALYSIS OF' SAFETY IMPLICATIONS This condition is evaluated as not reportable under 10CFR50.55(e) since the subject check valve is located on a system that is not in service during reactor operation, has the outside containment isolation valve normally~ locked closed, and terminates inside containment at utility air stations with normally closed valves.

A potentially safety significant impact due to failure of this check valve does not exist.

III. CORRECTTF ACTION

1. Discussions with Anchor Darling Valve Company have indicated that staking the set screw in place of a tack weld would be acceptable.. APS will perform this repair on the Unit i valve in conjunction with the vendors requirements to shim the valve to obtain allowable seat leakage.

I 2. Units 2 and 3 Anchor Darling's 3" instrument air check valves,

[ one in each unit, will be inspected by Bechtel Construction to j assure that the valve pin set screw (PC-14) has been tack welded j and/or repaired by staking. Nonconformance Reports PC-4382 and E

PC-4383 have been initiated to document this Laspection.

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