ML20083Q043
| ML20083Q043 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 04/12/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| ANPP-29285-BSK, DER-84-15, NUDOCS 8404200309 | |
| Download: ML20083Q043 (3) | |
Text
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%.ff 60-2539 s
50630 Arizona Public Service Company s
April 12, 1984-ANPP-29285-BSr/TRB U. S. Nuclear Regulatory Commission e
Region V Creekside Oaks Office Park 1450 Marfa Lane - Suite 210 Walnut Creek, CA 94596-5368 Attention: Mr. T. W. Bishop, Director Division of Residenc Reactor Projects end Engineering Programs
Subject:
Interim Report - DER 84-15 A 50.55(e) Potentially Reportable Deficiency Relating to Welds l
Attaching Pipe Restraint Supports Less Than Design Calculated Dimensions.
File: 84-019-026; D.4.33.2
Reference:
Telephone Conversation between P. Narbut and J. Cook on March 21, 1984
Dear Sir:
The NRC was notified of a potentially reportable deficient:y 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 require $, an~ Interim - \\
Report is attached. Itfis now expected that this information will be finalized by August 3,1984, at which' time a complet.e report will be submitted.
s Very truly yours k __
CLL5L._
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E. E. Vat Brunt, Jr.
APS Vice Pre.sident, Nuclear
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ANPP Pioject Director 2 -
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Mr. T. W. Bishop DER 84-15 Page Two cc:
Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 T. G. Woods, Jr.
W. E. Ide D. B. Fasnacht A. C. Rogers B. S. Kaplan L. A. Souza j
J. Vorees -
J. R. Bynum P. P. Klute A. C. Gehr W. J. Stubblefield W..G. Bingham R. L. Patterson i
R. W. Welcher H. D. Foster D. R. Hawkinson L. E. Vorderbrueggen G. A..Fiorelli~
S. R. Frost J. Self D. Canady Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite -1500 Atlanta, GA 30339 1
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t INTERIM REPORT - DER 84-15 POTENTIAL REPORTABLE DEFICIENCY ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNIT 2.
I.
Potential Problem l
A. Design drawings, specifications, and procedures do not fully identify all the requirements for welding a pipe restraint 1
support to the pipe pressure boundary. This includes:
Minimum length of weld required for acceptance.
Maximum allowable fillet weld leg size.
Provisions to increase the fillet leg size when the gap between the restraint and the' pipe is not a formed fit-up of 0-1/16" clearance.
B. Without the above requirements, the field practice is to perform welding until approximately 1/8 inch gap is encountered between the pipe and the restraint. This practice has resulted in welds which are less than the design calculated weld dimensions.
4 II.
Approach to and Status of Proposed Resolution Bechtel Engineering is currently developing inspection criteria and
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a walk-down procedure to evaluate the condition and formulate a corrective action plan if required.-
4 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 3,1984.:
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