ML20132G685
| ML20132G685 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 09/18/1985 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Kirsch D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| REF-PT21-85 ANPP-33514-TDS, DER-85-27, NUDOCS 8510010602 | |
| Download: ML20132G685 (4) | |
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.,h R2cEIVED tiRc Arizona Nuclear Power Project 135 Srp pg fil2;2h P.O. BOX 52034 e PHOENIX. ARIZONA 85072-2034 September 18, 1985 0,P//s p ANPP-33514-TDS/TPS U. S. Nuclear Regulatory Commission Region V 1450 Maria Lane - Suite 210 Walnut Creck, CA 94596-5368 Attention:
Mr. D. F. Kirsch, Acting Director Division of Reactor Safety and Projects
Subject:
Final Report - DER 85-27 A 50.55(c) Reportable Condition Relating to Pacific Scientific Pipe Clamps File:
85-019-026; D.4.33.2 Re ferencc :
A) Tclephone Conversation between R. C. Sorensen and T. P. Siegfried on August 20, 1985.
Dear Sir:
Attached is our final written report of the Reportable Deficiency under 10CFR50.55(c), referenced above. The 10CFR21 cvaluation is included in this report.
l Very truly yours, SE Yu 41~t i
E. E. Van Brunt, Jr.
Executive Vice President Project Director EEVB/TPS/pik Attachment cc:
Scc Page Two l
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ANPP-33514-TDS/TPS September 18, 1985 Mr. D. F. Kirsch DER 85-27 Page Two cc Richard DcYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C.
20555 J. G. Haynes l.
D. B. Karner W. E. Idc
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D. B. Fasnacht A. C. Rogers L. A. Souza T. D. Shriver D. E. Fowler C. N. Russo J. R. ' Bynum
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J. M. Allen D. Canady.
A. C. Gehr G. A. Hierzer W. G. Bingham R. L. Patterson I
R.~W. Welcher j
H. D. Foster D. R. Hawkinson l
R. P. Zinuncrman M. L. Clyde j
B. T. Parker J. Provasoli D. N. Stover
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J. D. Houchen J. E. Kirby i
Records Center Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 l
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FINAL REPORT - DER 85-27 DEFICIENCY EVALUATION 50.55(c)
ARIZONA NUCLEAR POWER PROJECT (ANPP)
PVNGS UNITS 1, 2, 3 I.
Description of Deficiency Pacific Scientific Ictter dated July 19, 1985, (Reference A) notified PVNGS that 3/4" and 1" pipe clamps supplied by them are subject to slippage of the clamp circumfercacially around the pipe due to condi-tions in installations. Thc Ictter identifies 35 affected pipe clamps supplied to PVNGS which have been installed in Units 1, 2, and 3.
EVALUATION C1cycland Electric Illuminating Company has reported this condition to the NRC as a 10CFR50.55(c) probicm at the Perry Nuc1 car Station.
Correction of the probicm is mandatory since slippage of tbc subject pipe clamps would preclude shock arrestors from performing their func-tion of protecting safety related piping during a scismic cvent.
The root cause was that Pacific Scientific had used a calculation for a larger pipe clamp for use with these smaller clamps. That calcula-tion did not adequately address the Design Criteria for the smaller clamps and thus resulted in an insufficient torque specification for the identified pipe clamps.
II.
Analysis of Safety Implications As indicated above, this condition has previously been evaluated as reportable under the requirements of 10CFR50.55(c) and Part'21.
Should this condition remain uncorrected it would represent a safety signif-icant condition. This report addresses the reporting requirements of 10CFR20.21(b)(3) with the exception of the subpart (vi), regarding the number and location of such components supplied to other facilitics.
III. Corrective Action As specified by Reference A, correction of the probicm requires an in-crease in torque values for the clamp bolts.
If the specified torque cannot be achieved by tightening, replacement bolts and nuts will be installed as specified in the referenced Ictter.
The following docu-ments have been initiated to correct the 35 identified pipe clamps.
This work will be completed prior to fuct load in Units 2 and 3.
Work for Unit 1 is complete.
Unit 1 - EER's 85-SI-115 and 116 - CWO #101189 Unit 2 - EER's 85-RC-116 and 117 - WR #087994 and 087917 respectively-
- EER 85-SI-096 - WR #087993 Unit 3 - NCR PC-11344
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--Mr..D. F.= Kirsch.
DER 85-27 Page Two The vendor instruction manual has been updated and is retained in-the projects documentation system under log no. P209B-2-7.
Bechtel will notify Pacific Scientific and request them to_ update their review procedures to insure that this will not recur.
REFERENCE A.
. Letter Pacific Scientific to Arizona Public Service Co., July 19.-
1 1985.
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