ML20062N676
| ML20062N676 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 08/10/1982 |
| 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, DER-81-12, NUDOCS 8208230301 | |
| Download: ML20062N676 (6) | |
Text
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Docket Nos. 50-528/529/530 l,
50.55(e) Report
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3003 STA.
p.o. Box M666 PHOENIX, ARIZONA 85036 August 10, 1982 ANPP-21589-Gild /BSK 1
U. S. Nuclear Regulatory Commission Region V Creekside caks 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, Revision 4 - DER 81-12 A 50.55(c) Potentially Reportable Deficiency Relating to Mating Force of 125V DC Pull-Out Fuse Blocks Decreases After Several Insertions and Removals File: 82-019-026 D. 4. 33.2
Reference:
(A) Telephone conversation between J. Eckhardt and B. S. Kaplan on May 21, 1981 (B) ANPP-18237, dated Jyne 18,1981 (Interim Report)
(C) ANPP-19545, dated November 25, 1981 (Interim Report,.
Revision 1)
(D) ANPP-19869, dated' January 11,1982 (Interim Report, Revision 2)
(E) ANPP-20465, dated March 18, 1982 (Interim Report, Revision 3)
(F) ANPP-21234, dated June 21,1982 (Time Extension)
Dear Sir:
The NRC was notified of a potentially reportable deficiency in Reference (A),
Interim Reports were transmitted by References (B), (C), (D), and (E), and a time extension was requested by Reference (F). At that time, it was estimated that a Final Report would be available by August-12, 1982.
Due to the extensive investigation and evaluation required, Revision 4 of the Interim Report is attached.
It is now expected that this information will be final-ized by November 3, 1982, at which time a complete report will be submitted.
Very truly yours, 04e bkdodg*-
' J d, ;
~J l E. E.-Van Brunt, Jr.
APS Vice President Nuclear Projects ANPP. Project Director EEVBJr/GHD:db Od Enclosure cc: ' See Attached Page 2 8208230201 820010
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i U. S. Nuclear Regulatory Commission August 10, 1982 Attention:
Mr. T. W. Bishop, Chief ANPP-21589-Gild /BSK Page 2 1
i cc: Richard DeYoung, Director l
Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 J. A. Roedel D. B. Fasnacht t
G. C. Andognini A. C. Rogers B. S. Kaplan 1
W. E. Ide J. Vorces J. A. Brand A. C. Gehr W. J. Stubblefield W. G. Bin; ham l
R. L. Patterson R. W. Welcher R. M. Grant l
D. R. llawkinson I. E. Vorderbrueggen l
G. A. Fiorelli i
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 l
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INTERIM REPORT - DER 81-12 POTENTIAL REPORTABLE DEFICIENCY ARlZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNITS 1, 2 & 3 I.
POTENTIAL PROBLEM The pull-out fuse blocks supplied as a component of the safety related 480V Load Centers by Brown Boveri Electric, Incorporated were found to have a substantial reduccion in the mating force requirement af ter several inser-tions and removals.
This condition is considered unacceptable because there exists a question as'to whether the copper female clips provided with the fuse block are capable of performing their safety related function of maintaining contact after many removals and insertions of the fuse blocks during the life of the plant.
The equipment impacted by this condition are identified by the following equipment tag numbers:
1, 2 & 3-E-PGA-L31 1, 2 & 3-E-PGB-L32 1, 2 & 3-E-PGA-L33 1, 2 & 3-E-PGB-L34 1, 2 & 3-E-PGA-L35 1, 2 & 3-E-PGB-L36 This condition is attributed to the inadvertent annealing of the fuse clip while brazing it to its' mounting terminal during the manufacture of the fuse block assemblies by the subtier supplier Gor 1.d, Incorporated, Bellefontaine, Ohio.
II.
APPROACll TO AND STATUS OF PROPOSED RESOLUTION Brown Boveri Electric, Incorporated agrees that the' fuse blocks are not l
acceptable as delivered.and is attempting to provide a modification. plan which will correct the condition.
T: tis supplier has also indicated that this design is unique to the PVNGS project.
Could, Incorporated, Bellefontaine, Ohio is furnishing a mechanical retainer l
which, when installed in the fuse block body, is intended to provide a-positive retaining force for the fuse clips.
The vendor has submitted a l
sample for trial; however, as indicated-by the attached Bechtel telephone notes dated July 16, 1982, the original mating problem.has not been-corrected.
In order to support theEplant startup schedule, alternate plans to replace the fuse block are being developed by Bechtel engineering.
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e Interim Report - DER 81-12 August 10, 1982 Page 2 111.
PROJECTED COMPLETION OF CORRECTIVE ACTION AND SUBMITTAL OF Tile FINAL REPORT Evaluation of this condition and submittal of the Final Report is forecast to be completed by November 3, 1982.
TELEPHONE NOTES DISTRIBUTION R. Boddula M. 'Ibrikian R. L. Anderson Bechtel M. M
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_,f nf628-7660 A. Johson T. Rhoads BBC yo.
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File 7/16/82 10107 13-B1-017 oayc
,o, y o, 7, o g DER 81-12 Bulldog Fuse Blocks suo;cer l.te r-R.BoddulaandIspoketoEdRhoadsabouttheclipsA. Johnson,ofBDCPpnix,,.
norcs fonarded to the site for bulldog fuse block modification.
Unit 2 installed the clips in three (3) fuse blocks. 'Ihe clips tightened the male portion of fuse block in the famle portion, llowever, the contact renains in qu.es,_.
tion, as stated on the DER 81-12 Ed Rhoads said he uns still running a test, and would address the contact mating _..._
problun and would reply.in two (2) weeks on his findings.
'Ihis is the response to BDC letter, dated July 6,1982 h
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