ML20074A631
| ML20074A631 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 05/03/1983 |
| 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, ANPP-23642-RQT, DER-82-80, NUDOCS 8305130226 | |
| Download: ML20074A631 (3) | |
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Arizona Public Service Company i
I Po. Box 21fA6. PHOENIX. ARIZONA 85036
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May 3, 1983 ANPP-23642-RQTQSKy i
U. S.' Nuclear Regulatory Commission j
Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, California 94596-5368 i
Attention:
Mr. D. M. Sternberg, Chief Reactor Projects Branch 1 gp g, (,c '/, C#
Subject:
Interim Report, Revision 1 - DER 82-80 A 50.55(e) Potentially Reportable Deficiency Relating to Conax Electrical Penetrations Low Insulation Resistance Does Not Meet Qualification Tests File:
83-019-026 D.4.33.2
Reference:
(A) Telephone Conversation between T. Young and G. Duckworth on December 17, 1982 (B) ANPP-22736, dated January 17, 1983 (Interim Report)
Dear Sir:
The NRC was notified of a Potentially Reportable Deficiency in Reference (A) and an Interim Report was transmitted by Reference (B). At that time, it was estimated that a Final Report would be available by May 10, 1983.
i Due to the extensive investigation and evaluation required, a revised Interim Report is attached. It is now expected that this information will be finalized by September 14, 1983, at which time a complete report will be submitted.
Very truly y CLLC G
E. E. Van Brunt, Jr.
APS Vice President j.
Nuclear Projects ANPP Project Director i
EEVBJr/RQT:ske i
Attachment cc: See Page 2 8305130226 830503 PDR ADOCK 05000528 l
6 PDR y
j Mr. D. M. Sternberg, Chief ANPP-23642-RQT/BSK May 3, 1983 Page'2 cc:
Richard DeYoung, Director Office of Inspection and Enforcement U..S. Nuclear Regulatory Commission Washington, D. C. 20555 T. G. Woods, Jr.
G. C. Andognini J. A. Roedel D. B. Fasnacht A. C. Rogers B. S. Kaplan W. E. Ide J. Vorees J. R. Bynum P. P. Klute/D. D. Green 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 Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway - Suite 1500 Atlanta, Georgia 30339
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INTERIM REPORT, REVISION 1 - DER 82-80 I
POTENTIAL REPORTABLE DEFICIENCY ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNITS 1, 2 AND 3 3.
I.
Potential Problem Specification No. 13-EM-035A requires that E~ectrical Penetration Assemblies (EPA) be qualified to IEEE Standard 317-1976. Section No. 5.2 of IEEE 317-1976 requires that the Instrumentation Circuits in EPA be designed to meet the requirements of the. instrumentation system in which they are used.
Review of Qualification Reports for Terminal Blocks supplied by Conax Corporation has revealed substantially. low insulation resis-tance values.during the Design Basis Event Simulation Tests. Low level signals (up to a maximum 48 VDC and 4-20 ma range) cannot tolerate this low insulation resistance condition. This could result in erroneou's control. functions that may jeopardize reliable plant operation under an accident condition.
II. -Approach To and Status Of Proposed Resolution An investigative test was conducted by Conax Corporation on unaged terminal block samples simulating actual service and installation conditions with transmitters installed. Details of this test are given in Conax Report No,' IPS-1011.2 (Bechtel' Log No. E035A-566-1).
Currently, similar testing is being performed on aged sampics, with a report to follow upon test completion.
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 September 14, 1983.
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