ML20054H914
| ML20054H914 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/09/1982 |
| From: | Van Brunt 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-21161-GHD, DER-82-19, NUDOCS 8206250186 | |
| Download: ML20054H914 (4) | |
Text
Docket Nos. 50-528/529/530 6
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50.55(c) Report EKED ls &cTf RC !sGIE,291I33Bd (Dffril3%%TE: p MMM v
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P.o. BOX 21666 PHOENIX, ARI2oNA 85036 June 9, 1982 ANPP-21161-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. T. W. Bishop, Chief Reactor Construction Projects Branch
Subject:
Interim Report - DER 82-19 A 50.55(e) Potentially Reportable Deficiency Relating to Class IE Motor Control Center by GE Burned Out Due to Protruding Screw Puncturing Cable Insulation File:
82-019-026 D.4.33.2
Reference:
(A) Telephone Conversion between J. Eckhardt and G. Duckworth on April 30, 1982 (B) Telephone conversation between J. Eckhardt and G. Duckworth on June 1, 1982
Dear Sir:
The NRC was notified of a potentially reportable deffciency in Reference (A).
At that time, it was estimated that a determination of reportability would be made within thirty (30) days.
In Reference (B), the NRC was notified by phone that the deficiency had been evaluated by Bechtel as Not Reportable, therefore no written report was required.
Subsequently, due to additional time required to complete their Final Report to APS, Bechtel transmitted an Interim Report on June 3, 1982.
It is now expected that this information will be completed by August 19, 1982, at which time a letter confirming final disposition will be submitted.
Very truly yours, hkg b
A E. E. Van Brunt, Jr.
APS Vice President Nuclear Projects ANPP Project Director EEVBJr/GHD:db Enclosure cc:
See Attached Page 2 8206250186 820609 DR ADOCK 05000 g, jgg
U. S. Nuclear Rzgulatory Commission Attention:
Mr. T. W. Bishop, chief ANPP-21161-GHD/BSK June 9, 1982 Page 2 cc:
Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory. Commission Washington, D. C.
20555 J. A. Roedel D. B. Fasnacht G. C. Andognini
'a 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. Fiore111 Lynne Bernabei, Esq.
Harmon & Weiss 1725 "1" Street, NW Suite 506 Washington, D. C.
20006 R. L. Greenfield Assistant Attorney General Bataan Memorial Building Santa Fe, New Mexico 87503
l INTERIM REPORT - DER 82-19 POTENTIAL REPORTABLE DEFICIENCY ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNIT 1 I.
Potential Problem Class IE General Electric motor control center (MCC-IE-PHA-F01) cubicle Pila-M3117 shorted out af ter completing the prequisite tests and being reinstalled into the MCC.
Initially, it was believed that one of the power cables on the back plate was punctured by the protruding end of a mounting screw which attaches the motor contactor.
General Electric's review of this condition did not identify the cause.
GE does not believe the self-tapping screw caused the short since it has not experienced any similar conditions during more than 20 years this generic design has been in use.
Reference General Electric letter to Bechtel Power Corporation dated 5/18/82, copy attached.
II.
Approach To and Status Of Proposed Resoluction Bechtel is currently completing its investigation into this condition.
III.
Projected Completion Of Corrective Action and Submittal Of The Final Report Evaluation of this condition and submittal of the Final Report is Forecast to be completed by August 19, 1982.
L i
'N Attachment to DER 82-19 GENER AL $ ELECTRIC stEcraic uritivy SALES DIVISION GENERAL ELECTRIC COMPANY,9350 E. FLAIR DR., EL MONTE, CALIFORNIA 91734 Phone: (213) 572-5200 gg MAILING ADDRESS: P.O. BOX 2830, TERMINAL ANNEX, LOs ANGELES, CALIF. 90051 m sesor May 18, 1982 l M'f1 MAY 20'82 E
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M SMas Bechtel Power Corporation A-E-1 P.O. Box 60860
- *a Terminal Annex r_E Los Angeles CA 90060 7'
l Attn:
W. G. Bingham
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e Subj: Arizona Nuclear Power Project L,
480V MCCs Er um EM-018 L
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um Gentlemen:
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This problem was investigated at the site by Mr. R. C. Roes:W ar-from our Mebane factory.
The type of failure did not appear to be caused by the cable being punctured. A complete examination was not possible because of the equipments inaccessibility. We have requested the unit be returned to Mebane for investigation; however, the unit may have been dismantled and used for parts.
Using historical data as support, we have had no failures of any kind that we are aware of on 7700 line motor control centers which could be attributed to a self tapping mounting screw piercing the insulation on i
the line cables of those starter units. This design has been utilized i
since 1960 and over 200,000 units are currently in operation. The units are safe as designed and no action is necessary.
Very truly yours.
L. R. Fickel Sales Engineer i
~
.