ML20009A960
| ML20009A960 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/26/1981 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Faulkenberry B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, ANPP-18289-BSK, NUDOCS 8107140550 | |
| Download: ML20009A960 (3) | |
Text
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50.55(e) R: port Docket N;s. 50-529/529/530 SY
$ hh P. O. B O X 2 8 6 6 6 PHOENI A, ARI2oN A 85036 June 26, 1981 W. yi'h ANPP-18289-BSK/ JAR
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0 U. S. Nuclear Regulatory Commission h
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Region V Walnut Creek Plaza - Suite 202 1990 North California Boulevard Walnut Creek, California 94596 Attention:
Mr. B. H. Faulkenberry, Chief Reactor Construction and Engineering Support Branch
Subject:
Interim Report A 50.55(e) Potentially Reportable Deficiency Relating to the Turbine Driven Pump Which Cannot Provide Auxiliary Feedwater Flow Within 10 Seconds With Off-Site Power Available and a Failure of the Motor Driven Pump File: 81-019-026 D.4.33.2
Reference:
Telephone Conversation between J. Eckhardt and B. S.
Kaplan on June 5, 1981 (DER 81-15)
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 thf s infomation will be finalized by February 1, 1982, at which time a complete report will be submitted.
52 Very truly you
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JUL 13198W m3 APS Vice President gm Nuclear Projects i,
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PDR 81-108
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U. S. Nucicar Rsgulatory Commission Region V Attention: Mr. B. H. Faulkenberry, Chief ANPP-18289-BSK/ JAR June 26, 1981 j
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cc: Victor Stello, Jr., Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C.
20555 A. C. Gehr Snell & Wilmer R. L. Robb D. B. Fasnacht W. E. Ide J. M. Allen A. C. Rogers J. A. Brand W. H. Wilson W. C. Bingham W. J. Stubblefield R. L. Patterson R. W. Welcher D. R. Hawkinson i
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. e INTERIM REPORT POTENTIAL REPORTABLE DEFICIENCY ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNIT 1, 2 AND 3 I.
Potential Problem Combustion Engineering's (CE) CESSAR, in Sections 5.1.4.F.9 and 5.1.4.G.6, states that auxiliary feedwater flow, with off-site power available and a single failure, must reach the steam generator within 10 seconds. Combustion Engineering's auxiliary feedwater interface requirement to initiate flow within 10 seconds is to ensure that auxiliary feedwater reaches the steam generatore before the steam generators boil dry.
Correspondence between CE, Bingham-Willamette Company, and Bechtel determined that with loss of off-site power and a single failure of the motor dirven auxiliary feedwater pump, the turbine driven pump cannot initiate flow within 10 seconds.
II.
Approach To and Status Of Proposed Resolution Combustion Bigineering will re-analyze the 10-second initial flow requirement to determine if a longer time can be established. A quick-start test on the turbine is recommended to verify supplier's (Bingham-Willamette) verbal belief that start time can be reduced by adjustment of the turbine governor. The analysis and test results will demonstrate adequacy of design.
Engineering estimates that the turbine pump test can be completed within one month af ter approval of the test plan.
III. Projected Completion'of Corrective Action and Submittal Date of the Final Report The Marathon /Bechtel analysis, review, disposition and final report of these conditions is forecast to be completed by February 1, 1982.
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