ML20030C423
| ML20030C423 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/18/1981 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Faulkenberry B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, ANPP-18237-BSK, NUDOCS 8108260092 | |
| Download: ML20030C423 (3) | |
Text
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50.55(e) Report 3
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g' Docket Nos. 50-528/529/530
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P. O. box 21666 PHOENIX, ARIZoN A 85036 June 18, 1981 ANPP-18237-BSK/ JAR U. S. Nuclear Commission
.ff Region V y
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'g Walnut Creek Plaza - Suite 202 t,
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1990 North California Boulevard g JUN 221001 ;
Walnut Creek, California 94596 j} ly/,
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D Attention:
M,. B. H. Faulkenberry, Chief Reactor Construction and
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Enginaering Support Branch
Subject:
Interim Report A 50.55(e) Potentially Reportable Deficiency Relating to the Mating Forces of the 125V DC Control Power Fuse Blocks Decreases Af ter Several Insertions and Removals of the Pull-Out Fuse Blocks File:
81-019-026 D.4.33.2
Reference:
Telephone Conversation between J. Eckhardt and B. S. Kaplan on May 21, 1981 (DER 81-12)
Dear Sir:
The NRC was notified of a potentially reportable deficiency in the referenced telephone conversation. At that time, it was estimated that a determination of reportability would be made within thirty (30) days.
Due to the extensive investigation and evaluation required, an interim report is attached.
It is now expected that this information will be finalized by December 15, 1981, at which time a complete report will be submitted.
Very truly yours,
~^
n e-Cath @Q E. E. Van Brunt, Jr.
t APS Vice President Nuclear Projects ANPP Project Director EEVBJr/BSK:ske yh7
.5 Attachment
/I 8108260092 810618 PDR ADOCK 05000528 S
PDR 51- # 9 9
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w U. S. Nuclear Regulatory Commission Region V Attention:
Mr. B. H. Faulkenberry ANPP-18237-BSK/ JAR June 18, 1981 Page 2 cc: Victor Stello, Jr., Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C.
20555 A. C. Gehr Snell & Wilmer R. L. Robb D. B. Fasnacht W. E.
Ide J. M. Allen A. C.
Rogers J. A. Brand W. H. Wilson W. G. Bingham W. J. Stubblefield R. L. Patterson R. W. Welcher D. R. Hawkinson
it O
o INTERIM REPORT POTENTIAL REPORTABLE DEFICIENCY ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNIT #1 1.
Po,tential Problem The pull-out fuse blocks manufactured by Bulldog Electrical Products, Incorporated and supplied as a component of the 480V Load Centers from Gould-Brown-Boveri were foJnd to have a substantial reduction in the mating force requirement after several insertions and removals.
This condition was raised as a concern by the project start-up group because there exists a question as to whether the copper female clips provided with the fuse block are capable of per-forming their safety-related function of maintaining contact after many removals and insertions of the fuse blocks during the life of the plant.
II.
Approach To and Status Of Proposed Resolution Bechtel has requested assistance from Gould-Brown-Boveri in reviewing, evaluating and dispositioning this condition.
I f
III.
Projected Completion of Corrective Action and Submittal Date of the Final Report The evaluation, resolution and final report are forecast to be completed by December 15, 1981.
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