ML20116D730

Interim Significant Deficiency Rept (SD-72) Re Installation of Foxboro Transmitters.Initially Reported on 850118.Conduit for Transmitters Will Be Reworked.Investigation Continuing. Next Rept Expected by 850509

ML20116D730
Person / Time
Site:	Millstone
Issue date:	03/29/1985
From:	Counsil W NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
(SD-72), F0701A, F701A, F701A), NUDOCS 8504290525
Download: ML20116D730 (2)

Text

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Reference:

(1) W. G. Counsil to T. E. Murley, F0676A, dated February 15,1985.

Dear Dr. Murley:

Millstone Nuclear Power Station, Unit No. 3 Reporting of Potential Significant Deficiencies in Accordance with 10CFR50.55(e):

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 in accordance with 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 did not appear in the conduit for the installed Foxboro transmitters.

Our architect-engineer, Stone and Webster Engineering Corporation, has verified that there are only two (2), QA Category I Foxboro transmitters installed at Millstone Unit No. 3. The conduit for these transmitters will be reworked in accordance with the instruction Manual by NNECO on a post-turnover basis.

l 8504290525 850329 PDR ADOCK 05000423 S PDR i 0 t

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We are still investigating the potential scope of this significant deficiency and, as such, are not able to provide a final report at this time. We will provide an update on this matter by May 9,1985.

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY

. M/

W. G. CounsiT Senior Vice President cc: Mr. 3. M. Taylor, Director Division of Inspection and Enforcement U.S. Nuclear Regulatory Commission Phillips Building 7920 Norfolk Avenue Bethesda, MD 20814

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