ML20063N197
| ML20063N197 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 09/02/1982 |
| 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-21763-GHD, DER-82-40, DER-82-403-GHD, NUDOCS 8209200084 | |
| Download: ML20063N197 (3) | |
Text
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Docket Nos. 50-528/529/530 i
EECgigE9 4
50.55 (e) Report 4
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$ MM OSU 79 3003 STA.
p.o. sox anses - psocNix, ARIZONA 85036 h
September 2, 1982 6.;,g'.,
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U. S. Nuclear Regulatory Commission j
Region V Creekside Oaks Office Park i
1450 Maria Lane - Suite 210
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Walnut Creek, California 94596-5368 Attention:
Mr. D. M. Sternberg, Chief l
Reactor Projects Branch 1 1
i
Subject:
Interim Report - DER 82-40 l
A 50.55(e) Potentially Reportable Deficiency Relating to Unit 1 Instrument AC Circuit Breakers Were Left Set Below i
Trip Range After Testing.
I File: 82-019-026 2
D.4.33.2 i.
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Reference:
Telephone Conversation between J. Eckhardt and G. Duckworth j
on August 6, 1982
Dear Sir:
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The NRC was notified of a potentially reportable deficiency in the referenced telephone conversation. At that time, it was estimated j
that a determination of reportability would be made within thirty (30) days, s
Due to the extensive investigation and evaluation required, an Interim Report is attached.
It is now expected that this information will be finalized by November 22, 1982, at which time a complete report will be submitted.
Very truly yours, j
CLkL
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E. E. Van Brunt, Jr.
APS Vice President 4
1 Nuclear Projects Management ANPP Project Director EEVBJr/Chd:db Attachment cc: See Attached Page 2 j
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8209200004 820902 6/
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U. S. Nuclear Regulatory Commission September 2, 1982 Attention:
Mr. D. M. Sternberg, Chief ANPP-21763-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 G.
C. Andognini A.
C. Rogers B. S. Kaplan W.
E.
Ide J. Vorces 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.
liarmon & Weiss 1725 "1" Street, NW Sujte 506 Washington, D.
C, 20006 R. L. Greenfield Assistant Attorney General Bataan Memorial Building Santa Fe, New Mexico 87503 i
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INTERIM REPORT - DER 82-40 POTENTIAL REPORTABLE DEFICIENCY ARIZONA PUBLIC SERVICE COMPANY (APS)
I.
POTENTIAL PROBLEM APS generic test procedure for molded case circuit breakers, EG-206, Rev.1, Section 2.2 requires that the circuit breaker magnetic overloads provide an instantaneous trip upon application of current equal to the magnetic trip setting of the breaker as outlined in Section 8.0, and Exhibit A.
Allowable test tolerance shall be t 20 percent.
During a review of test records by APS, it was found that the tested trip currents are below the allowable tolerance of 120 percent of the adjustable magnetic trip setting for the following molded case circuit breakers in Class IE instrument AC power (system PN-01).
Magnetic Breaker / Service Trip Range Low AMPS Final AMPS lEPNBN12 - Inverter input 1200-4000 Phase A-706 706 (254 too low) 25 KVA Inverter panel Phase B-881 881 (79 too low) lE-PNB-N12 IEPNBD26-AC Power Input 750-2500 Phase A-632 536 (64 too low) to panel IE-PNB-D26 Phase 3-621 665 (in tolerance) 1EPNCD27 - AC Power Input 750-2500 Phase A-537 537 (73 too low) to panel IE-PNC-D27 Phase B-587 587 (13 too low)
II.
APPROACll TO AND STATUS OF PROPOSED RESOLUTION Bechtel Engineering is currently reviewing the methodology used in this test.
General Electric will be contacted if additional evaluations are required.
III.
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 22, 1982.