ML20099H135
| ML20099H135 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 02/15/1985 |
| From: | Counsil W, Sears C NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| (SD-72), F0676A, F676A, NUDOCS 8503150182 | |
| Download: ML20099H135 (2) | |
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General Offices
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February 15, 1985 Docket No. 50-423 F0676A 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 PotentialSignificant Deficiencies in Design and Construction: Foxboro Transmitters (SD-72)
In a January 18, 1985 telephone conversation between your Mr. T. Rebelowski and our Mr. L. Chiarizia, 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 the installation of Foxboro transmitters.
Instrumentation installation specifications require all equipment to be installed per the engineering drawings and the applicable instruction manual. The Foxboro Instruction Manual requires a drain hole to be drilled into the conduit to prevent an accumulation of moisture in the transmitter junction box.
A NNECO engineering evaluation revealed that these drain holes do not appear in the conduit for the installed Foxboro transmitters.
A preliminary investigation determined that there are at least two (2) Category I Foxboro transmitters which were installed for Millstone Unit No. 3. The conduit for these transmitters will be reworked on a post-turnover basis by NNECO.
We have not completed our investigation of this problem and, as such, are unable to provide a final report at this time.
8503150182 850215 PDR ADOCK 05000423 S
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. - We will provide you with an update by March 29,1985.
Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY bib.b W. G. Counsil Senior Vice President By: C. F. Sears Vice President cc:
Mr. 3. M. Taylor, Director Division of Inspection and Enforcement U. S. Nuclear Regulatory Commission 4
Phillips Building i
7920 Norfolk Avenue Bethesda, MD 20814
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