ML20091N439
| ML20091N439 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 06/01/1984 |
| From: | Counsil W NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| F0517A, F517A, SD-53, NUDOCS 8406120315 | |
| Download: ML20091N439 (2) | |
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June 1,1984 Docket No. 50-423 FO)l7A Dr. Thomas E. Murley Regional Administrator Region I U. 5. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406
Reference:
(1)
W. G. Counsil to T. E. Murley, F00500A, dated March 16, 1984.
Dear Dr. Murley:
Millstone Nuclear Power Station, Unit No. 3 Reporting of Potential Significant Deficiencies in Design and Construction:
Isolator Cabinets, Main Ventilation, Air Conditioning and Other Miscellaneous Panels with Improperly Crimped Lugs (SD-53)
In a February 15, 1984 telephone conversation between your Mr. T. Rebelowski and our Mr. R. E. Lefebvre, 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 inadequate lug crimping in isolator cabinets, main ventilation, air conditioning, and other miscellaneous panels supplied by Systems Control.
Our architect-engineer, Stone & Webster Engineering Corporation, has completed a one-hundred percent lug crimping inspection for all pre-turned-over panels supplied by Systems Control. Repair work for these panels will begin in mid-June, 1984. NNECO has completed a similar inspection program for all post-turned-over panels supplied by Systems Control and approximately seventy-eight percent of the repair work has been completed for these post-turned-over panels.
The inspection programs revealed that approximately forty to sixty percent of the terminations in the panels supplied by Systems Control for Millstone Unit No.
3 had incomplete or incorrectly crimped lugs tha't met the rejection criteria specified in the manufacturer's Instruction / Maintenance / Inspection Manual. The repaired lugs will be installed to meet the manuf acturer's installation criteria.
8406120315 840601 PDR ADOCK 05000423 S
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. s 4.+- ~ We are not able to prcJide you with a final report at this time. We will provide an update or a final report on this matter by September 27,1984.
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- Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY
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AkW 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 l
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