ML20087N449
| ML20087N449 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/07/1984 |
| From: | Counsil W NORTHEAST UTILITIES |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| F0489A, F489A, SD-52, NUDOCS 8404030470 | |
| Download: ML20087N449 (1) | |
Text
General Offices
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HARTFORD CONNECTICUT 06141-0270
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(203) 666-6911
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n0Rf4att muCLE4R ENEaQV COWN March 7,1984 Docket No. 50-423 F0489A Dr. Thomas E. Murley Regional Administrator Region i U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406
Dear Dr. Murley:
Millstone Nuclear Power Station, Unit No. 3 Reporting of Potential Significant Deficiencies in Design and Construction: Service Water Pipe Trunions (SD-52)
In a February 6,1984 telephone conversation between your Mr. T. Elsasser and our Mr. R. W. Vogel, Northeast Nuclear Energy Company (NNECO) reported a potential significant deficiency in the construction of Millstone Unit No. 3 as required by 10CFR50.55(e).
The potential significant deficiency involves fabrication of integral welded carbon steel trunions to copper nickel piping in the Service Water System. Deformation of the copper nickel pipes in the vicinity of the carbon steel trunions was observed.
Two attachment weldments leaked during hydrostatic tests.
bur architect engineer, Stone & Webster Engineering Corporation, is in the process of reevaluating the design and fabrication details of the carbon steel trunion attachments to the copper nickel piping. Initial inspection and analysis has resulted in redesign and replacement of seven (7) integral welded trunions.
The remaining twenty (20) trunions are being redesigned.
We are not able to provide you with a final report at this time. We will provide you with an update on this matter by May 15,1984.
Very truly yours, J1't'420t W. G. Counsil Senior Vice President cc:
Mr. R. C. DeYoung, Director Division of Inspection and Enforcement U. S. Nuclear Regulatory Commission Phillips Building 7920 Norfolk Avenue Bethesda, MD 20014 V
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