ML20024A464
| ML20024A464 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/06/1983 |
| 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, 10CFR-50.55E, ANPP-23952-BSK, DER-83-30, NUDOCS 8306170341 | |
| Download: ML20024A464 (3) | |
Text
{{#Wiki_filter:- n., P.ECSVED. NRC Arizona Public Service Company P.O. BOX 21666. PHOENIX, ARIZONA 85036 JN ((1 3 - ANPP-23952-BSK/RQT ~ IEG!OHVIM l 4 U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 4 1450 Maria Lane - Suite 210 Walnut Creek, CA 94596-5368 Attention: Mr. D. M. Sternberg, Chief Reactor Projects Branch 1-l
Subject:
Interim Report . DER 83-30 A 50.55(e) Potentially Reportable Deficiency Relating to A354 i. Bolt Broke When Torquing The Bolts On The Unit 2 Feedwater Pump File: 83-019-026; D.4.33.2
Reference:
Telephone Conversation between T. Young'and R. Tucks; on May 5, 1983-
Dear Sir:
The NRC was notified of a potentially reportable deficiency in the 4-referenced telephone conversation. At that time, it was estimated that a determination of reportability would be made within thirty (30) days. l 'Due to the extensive investigation and evaluation required, an Interim ~ Report is attached. It is now expected that this information will be J finalized by August 17,.1983, at which time a complete report will be ~ submitted. Very truly yours, L - CLC L._ /\\ L f E. E. Van Brunt, Jr. i APS Vice President, i. Nuclear Projects Management g-{[ ANPP Project Director EEVB/RQT:ru At tachment cc: See Page 2 s i I' i 8306170341 830606 I \\ PDR ADOCK 05000529 \\ i -S~ PDR ^' ~'*'t '--+-v--.-,y
i U. S. Nuclear Regulatory Commission Page Two 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, GA 30339 E o .-w n ,.w a -m, p 4 ny n
,g INTERIM REPORT - DER 83-30 POTENTIAL REPORTABLE DEFICIENCY ARIZONA PUBLIC SERVICE COMPANY (APS) PVNGS UNIT 2 I. Potential Problem While torquing an anchor bolt for the installation of the Unit 2 turbine driven Auxiliary Feedwater pump, the nut was observed to be rotating excessively before reaching the required torque. Torquing was stopped at that time. Upon return to the pump the following day, the bolt was found to have failed. The bolt is a high strength A-354 BD l-1/4" diameter anchor bolt with a specified installation torque of 2360 ft-lbs. Thirteen bolts had already been successfully installed for the pump. Test records.showed the failed bolt exhibited a hardness reading of L632, which-is comparable to a Rockwell -C Hardness of 39. II. Approach To And Status Of Proposed Reolution - 1. The equipment supplier has been contacted regarding the broken stud. A seismic stress analysis has been requested for the case of only 13 installed studs to determine if the condition may be "used-as-is". 2. A testing program has been developed and is being conducted to assess whether the specified installation torque values are appropriate for providing the desired level of preload tension. 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 August 17, 1983. ,}}