ML20063N862

Final Deficiency Rept Re Mounting Failures of C-E Supplied Valve Position Indicating Switches.Initially Reported on 820525.Nonconformance Rept SE-0487/0542 Dispositioned to Rework Broken Brackets.Not Reportable Per 10CFR50.55(e)

ML20063N862
Person / Time
Site:	Palo Verde
Issue date:	09/09/1982
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Sternberg D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, ANPP-21791-GHD, DER-82-26, NUDOCS 8210070321
Download: ML20063N862 (4)

Text

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NM N'NM Q MMM STA. 3003 P.o. BOX 21666 - NoENIX, ARIZONA 850J6 Sep,tember.9, 1982 ANPP-21791-GHD/BSK U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, California 94596-5368 Attention: Mr. D. M. Sternberg, Chief Reactor Projects Branch 1 Subj ect: Final Report - DER 82-26 i A 50.55(e) Report Relating to Mounting Failures of C.E. - Supplied Valve Position Indicating Switches File: 82-019-026 D.4.33.2

Reference:

(A) Telephone Conversation between T. Bishop and G. Duckworth on May 25, 1982.

l (B) ANPP-21227, dated June 18, 1982 (Interim Report) l

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,

\

EX. c%% A E. E. Van Brunt, Jr.

APS Vice President Nuclear Projects Management ANPP Project Director EEVBJr/GHD:db Attachment cc: See Attached Page 2

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,M 10070321 82090, . . . . '.

3PDR ADOCK 05000528 i D PDR _

. t o U. S. Nuclear Regulatory Commission September 9, 1982 Attention: Mr. D. M. Sternberg, Chief ANPP-21791-GHD/BSK Page 2 cc: Richa rd 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 G. C. Andognini A. C. Rogers B. S. Kaplan W. E. Ide J. Vorees J. A. Brand A. C. Gehr W. J. Stubblefield W. G. Bingham ,

R. L. Patterson R. W. Welcher R. M. Grant D. R. Hawkinson L. E. Vorderbrueggen G. A. Fiorelli Lynne Bernabei, Esq.

Harmon & Weiss 1725 "I" Street, NW Suite 506 Washington, D. C. 20006 R. L. Greenfield Assistant Attorney General Bataan Memorial Building Santa Fe, New Mexico 87503 Ir - -- . - .

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-FINAL REPORT - DER 82-26 DEFICIENCY EVALUATION 50.55(e)-

ARIZONA PUBLIC SERVICE COMPANY (APS)

PVNGS UNIT 1

'I.- DESCRIPTION OF DEFICIENCY During startup prerequisite testing of Target-Rock valves in the safety injection system, the Reed indicating switch clamp tack-weld was found to be either' broken or to break during positioning of the switch and tightening the adjustment nut. This condition causes loss of, or incorrect, valve position indication in the Control Room. lA total of six failures have been found, some of which had a broken bracket at the time the cover was removed for the positioning operation. Fourteen valves of this type,per unit are supplied by Cambustion Engineering as part of the NSSS contract as follows: SI-605, 606, 607, 608, 613, 623, 633, 643, 659, 600; CH-203, 205, 526; and RC403.

II. ANALYSIS OF SAFETY IMPLICATIONS APS and Bechtel requested assistance from. Combustion Engineering in evaluating andidispositioning,this condition, and concur with the analysis ~provided by the attached C-E letter V-CE-16593 that the condition is not reportable under the requirements of 10CFR50.55(e).

Should this condition remain uncorrected, it would not represent a safety significant condition.

.III. CORRECTIVE ACTION The Unit 1 NCR (SE-0487/0542) will be dispositioned to rework the six (6) broken brackets by rewelding the broken tackwelds. -Since the remainder of 'the material has been shipped, Units 2 and 3 indicating switches will be inspected and repaired on an as-requested basis. NCR's will be generated to document this corrective action.

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.* , C-E Power Systems Tel. 203/688-1911 mbust on En neering. inc. Telex 99297 Windsor. Connecticut 06095 Attr.chment to DER 82-26 /g3g f

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POWER June 21, 1982 S'2202 SYSTEMS V-CE-16593 M . _

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Mr. W. G. Bingham Bechtel Power Corporation 1 M$. =

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12400 East Imperial Highway 6 z_wp Norwalk, CA 90650 ' .:

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Subject:

Bechtel Power Corporation Reed Indicating Switches BECHTEL CCgggion Los w ,es O h ,

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Unit 1 DER-82-26 . ,c v

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References:

Techtel Power Corporation letters

1) B/CE-E-39848, dated 5/14/82 NL. n.< m s= o .

2) B/CE-E-40198, dated 6/9/82 -

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Dear Mr. Bingham:

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c Q,psy ce M. wezcee K.,

'Ihe subject DER states that Reed Indicating Switches are experiencing structural failure during valve testing in the tack weld of the reed switch clamp in breaking loose during positioning of switch and tightening of the adjustment nut. A total of six switch failures have been found (SI 605, SI 607, SI 608, SI 613, SI 633).

his failure would not affect the operation of said valves. 'Ihe only effect would be a loss of position indication. The effect of this loss would be that the operator would lose the open/close indication for that valve. In a non-accident situation, and in the short-tem accident response, these valves are locked closed with power removed. Post-accident, the desire for position indication comes from tile need to vent the Safety Injection Tanks (SIT) when the RCS is being depressurized. This precludes the injection of nitrogen into the RCS. The preferred method for confirmation of the depressurization of the SITS is verification by the use of the IE-powered SIT pressure indication. Thus the loss of valve position indication is not significant. During a nomal plant cooldown the defect SITS is are not depressurized applicable. by drawing water instead of venting nitrogen so the subject This condition has been reviewedand, in C-E's opinion, is not reportable under the requirements of 10CFR50.55(e) or 10CFR Part 21.

A C-E evaluation has been performed in accordance with our Quality Assurance of Design Manual offices.as indicated in FAR 14273-468 which is available for review in our C-E Windsor ,

If there are any further questions, please feel free to contact us. )

Very truly 'ours, l<

CF:RB C. Fer B Proj .fanager cc: Messrs:

E.E. Van Brunt, Jr. J.W. Dilk G.C. Andognini G.A. Butterworth J. Vorees S.N. Mager W.H. Wilson D.B. Amerine R.H. Holm W.L. MacDonald 1

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