ML20069M269
| ML20069M269 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 04/15/1983 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Sternberg D, Sternburg D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, ANPP-2351-RQT, ANPP-23513-RQT, DER-83-15, NUDOCS 8305030346 | |
| Download: ML20069M269 (3) | |
Text
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Arizona Public Service Company P.o. BOX 21666 e PHOENIX, ARIZONA 85036 j.r;g g
- q g; g April 15, 1983 ANPP-23513-RQT/BSK
! : g,j y U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, California 94596-5368 Attention: Mr. D. M. Sternberg, Chief Reactor Projects Branch 1
Subject:
Interim Report - DER 83-15 A 50.55(e) Potentially Reportable Deficiency Relating to A354 Anchor Bolt From Marathon Broke Under Installation Torque After Test Acceptance File: 83-019-026; D.4.33.2
Reference:
Telephone Conversation between P. Narbut and R. Tucker on March 18, 1983
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 May 19, 1983, at which time'a complete report will be submitted.
Very truly yours,
\\
CLLt al E. E. Van Brunt, Jr.
APS Vice President Nuclear Projects Management ANPP Project Director EEVB/RQT:db Attachment cc: See Attached Page 2 8305030346 030415 PDR ADOCK 05000529 S
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I U. S. Nuclear Regulatory Commission ANPP-23513-RQT/BSK April 15, 1983 Page 2 cc:
Richard DeYoung, Director
.0ffice of Inspection and Enforcement
'H. 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. Fiore11i Records Center Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 l
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.re INTERIM REPORT - DER 83-15 POTENTIAL REPORTABLE DEFICIENCY ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNIT 2 1.
POTENTIAL PROBLEM During verificatica of installation torque of Column 9 anchor studs in Unit 2 Containment Building, a one inch (1") diameter ASTM A354 Grade BD anchor stud supplied by Marathon Steel broke in the threaded portion (Drawing 13-C-ZCS-620 Emed No. 322, Bolt D).
The stud has a documented EQUOTIP Hardness of L = 578 and the specified installation torque is 1,071 f t.-lbs.
An engineering review of this condition has limited the problem to the identified Column 9 embedded studs as follows:
a)
There is evidence of overtorquing on other studs which secure Column 9.
b)
The other identical installations (Column 10 of Unit 2 and Columns 9 and 10 of Unit 3) have been verified to be torqued to the specified values with no problems.
c)
The torque wrench used for this particular installation has been checked and found to be within calibration requirements.
II.
APPROACH TO AND STATUS OF PROPOSED RESOLUTION Column 9 serves as a pipe whip restraint in the event of a Main Steam System break.
Should the subject condition remain uncorrected, Column 9 could potentially be unable to perform this safety-related function.
Since this condition could adversely af fect safety of opcrations and represents a significant deficiency in construction which requires extensive remedial action, it is reportable under the requirements of 10CFR50.55(e).
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 May 19, 1983.