ML20098E498
| ML20098E498 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 09/10/1984 |
| From: | Foster D GEORGIA POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| GN-414, NUDOCS 8409280561 | |
| Download: ML20098E498 (2) | |
Text
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3 Georgia Power Company Route 2, Box 299A V/aynesboro, Georgra 30830 Te:ephone 404 $54@G1, Est 3060 404 724 8114. Ext. 3360
.}l $[P l7 P l : IO Georgia Power D. o. Foster j j fk*f "'l*'
V wewww vogue Project September 10, 1984 United States Nuclear Regulatory Conunission Office of Inspection and Enforcement File: X78G03-M55 Region II - Suite 3100 Log:
GN-414 101 Marietta Street Atlanta, Georgia 30303
Reference:
Vogtle Electric Generating Plant-Units 1 and 2, 50-424, 50-425; HVAC Duct Support Weld Discrepancies; also GN-324, dated March 2, 1984 Attention: Mr. James P. O'Reilly Our previous correspondence on this subject provided a tentative schedule for an investigation and evaluation of the integrity of HVAC duct supports installed by Pullman /Kenith-Fortson (P/K-F).
This interim response provides an update on the progress of our evaluation and fore-casts an expected completion date for the resolution of this issue.
From a list of 3635 installed and inspected HVAC duct supports, Bechtel Power Corporation, the Vogtle architect-engineer, randomly selected a statistical sample of 60 supports to satisfy a 95/95 confi-dence level of support integrity.
This sample was used in a comprehen-sive visual reinspection program, using the acceptance criteria of Appendix VC to the HVAC specification (X4AJ01), to identify clearly and accurately all weld indications on each discrete weld of each support in the sample.
The Georgia Power Company Construction Department submitted the 4
resul ts of the reinspection program to Bechtel Power Corporation on June 21, 1984. Bechtel is presently conducting an independent determina-tion of the equivalent available as-built weld for each reinspected weld with indications, and a verification that adequate design margin exists between the required weld strength by design and the available as-built strength.
This work is expected to be completed by September 15, 1984.
Based on the expected completion date for the engineering evaluation and allowing time for internal review of the evaluation results, Georgia Power Company expects to submit the results of our evaluation of the HVAC duct support weld discrepancies to the NRC by October 26, 1984.
OFFICIAL COM i
8409280561 840910 T c7 5 PDR ADOCK 05000424 0
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'HVAC Duct. Support Weld Discrepancies
.Page Two This response contains no proprietary information and may be placed in the NRC Public Document _ Room.
Yours truly h0 Mm
- D. O. Foster #"'"
REF/D0F/tdm xc:
U. S. Nuclear Regulatory Commission Document Control Desk Washington, D. C.
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