ML20132E348
| ML20132E348 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 07/12/1985 |
| From: | Opeka J NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| F0799A, F799A, SD-84, NUDOCS 8508010784 | |
| Download: ML20132E348 (2) | |
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L TJ 7.;r.;C,",0l'!;C (203) esse July 12,1985 Docket No. 50-42.s F0799A Dr. Thomas E. Murley Regional Administrator U. S. Nuclear Regulatory Commission Region !
631 Park Avenue King of Prussia, PA 19406
Dear Dr. Murley:
Millstone Nuclear Power Station, Unit No. 3 Reporting of Potential Significant Deficiencies in Accordance with 10CFR50.55(e)
Seismic Failure - Ampheno! Triax Connector (SD-84) in a June 19, 1985 telephone conversation between your Mr. T. Rebelowski and our Mr. J. S. Nicosia, Northeast Nuclear Energy Company (NNECO) reported a potential significant deficiency in the construction of Mllistone Unit No. 3 in accordance with 10CFR50.55(e). The potential significant deficiency involves Ampheno! Triax Connectors.
During a Westinghouse seismic qualification test, a Triax Connector (Amphenol) failed at low "G" levels. This type of connector is used in the Kaman Radiation Monitoring System.
It has been determined that the failure of this type of connector would cause a loss of the radiation monitor detector.
This is considered a significant deficiency in the final design of Millstone Unit No. 3.
The existing triax connectors will be replaced by NNECO with a new qualified version. This corrective action will be complete within 30 days of receipt of the new connectors. Receipt is anticipated by November 1,1985.
As such, we consider this to be our final report for 5D-84. We trust that the above information satisfactorily responds to your concerns.
Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY h. h. hj-J. F. Opek4 U
Senior Vice President 48 0500010704 050712 1
ADOCK 0500 3
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2-cc:
Mr. J. M. Taylor, Director Division of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 l
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