ML20096G077
| ML20096G077 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 08/23/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| ANPP-30316-TDS, DER-84-50, OL, NUDOCS 8409100334 | |
| Download: ML20096G077 (3) | |
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Arizona Public Service Company August.23, 1984 ANPP-30316-TDS/'IRB U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, CA 94596-5368 Attention: Mr. T. W. Bishop, Director Division of Resident Reactor Projects and Engineering Programs
Subject:
Interim Report - DER 84-50 A 50.55(e) Potentially Reportable Deficiency Relating To Main Steam Isolation Valves Do Not Close Within 5 Seconds As Required.
File: 84-019-026; D.4.33.2
Reference:
Telephone Conversation between D. Hollenbach and T. Bradish on July 24, 1984
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 September 25, 1984, at which time a complete report will be submitted.
Very truly yours,
[
h h
l E. E. Van Brunt, Jr.
APS Vice President Nuclear Production ANPP Project Director EEVB/TRB/nj dij,j pg'D3!!
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See Page Two
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Mr. T. W. Bishop.
DER 84-50 Page Two
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Richard DeYoung, Director Office of -Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 T. G. Woods, Jr.
D. B. Karner W. E. Ide D. B. Fasnacht A. C. Rogers L. A. Souza D. E. Fowler T. D. Shriver C. N. Russo J. Vorees J. R. Bynum J. M. Allen J. A. Brand A. C. Gehr W. J. Stubblefield W. G. Bingham R. L. Patterson R. W. Welcher H. D. Foster D. R. Hawkinson L. E. Vorderbrueggen R..P.
Zimmerman S. R. Frost J. Self M. Woods T. J. Bloom D. Canady Records Center Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Atlanta, GA 30339
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- .7 Mh!EMM REPORT - DER 84-50 DPOIENTIAL REPORTABLE DEFICIENCY
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Potential Problem
- f Main Steam Isolation Valves (MSIV) failed the fast close within specified time of 4.2 seconds when plant was at:
N.0.P/#.O.T with no significant steam flow.
.\\s Feed Water Isolstien Valves '(FWIV) failed to cpapletely' close
- ir.- the fas't closure mode under unloaL*d conditions when s
nitrogen precharge pressure and total' oil / nitro' gen' pressure were set,to?na'nnfacturer's specifications.
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Approach To.sid $tatus Of Proposed Resolut': ion N
Bechtel EngiAdering da corresponding with Anchor / Darling on this problem to determine reportnoility and-technical
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justificatioa for corrective actica.
III.
Projected ' Completion of Corrective Action g Submittal of the Final. Report s
EvbluationofthisconditionandsubmittalofthaFinalReport is forecast to be completed by September.25,.1984.
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