ML20141N650

Final Deficiency Rept Re Environ Qualification of Tobar Pressure Transmitter Terminations.Initially Reported on 860205.Pressure Transmitters Reworked & Discrepancy & Startup Deviation Repts Issued

ML20141N650
Person / Time
Site:	Hope Creek
Issue date:	03/05/1986
From:	Corbin McNeil Public Service Enterprise Group
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 8603170446
Download: ML20141N650 (2)

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Pubhc Service -

Electric and Gas Company

' Corbin A. McNeill, Jr. Public Service Electric and gas Company P.O. Box 236, Hancocks Cridge, NJ 08038 609 339-4800

%c] President -

Nuclear March 5, 1986 Dr. Thomas E. Murley, Administrator U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Dr. Murley:

SIGNIFICANT CONSTRUCTION DEFICIENCY ELECTRICAL CONNECTIONS ON TOBAR TRANSMITTERS HOPE CREEK GENERATING STATION On February 5, 1986, a verbal report was made to Region I, Office of Inspection and Enforcement Representative, Mr. R.

Blough, advising of a potentially significant construction deficiency concerning environmenta) qualification of Tobar pressure transmitter terminations. The following final report is provided in accordance with 10CFR50.55(e).

Description of the Deficiency Bechtel Design Change Package (DCP) No. 316 was issued to provide for moisture intrusion seal 2ng of external wiring connections to various safety related devices, including

.Tobar transmitters. Moisture scaling is required for such devices which are located in areas potentially subject to a steam environment, water spray due to a pipe break, or a high humidity area. The specific design for the Tobar trans-mitters called for the use of butt splices at the connection of the external cable conductors to the pigtails of the trans-mitters. Contrary to the design, the Tobar transmitters were installed utilizing terminal blocks provided by the manufacturer.

The terminal blocks do not provide for the required moisture sealing of electrical conne:tions.

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Dr. T. E. Murley 2 3-5-86 Safety Analysis The Tobar pressure transmitters are installed in various safety related systems including High. Pressure Coolant Injection (HPCI),

Residual Heat Removal (9HR), Station Service Water, and Reactor Core Isolation Cooling (RCIC). The transmitters are intended to provide process information to the operator during normal

- and emergency modes of operation. Moisture intrusion at the 1~ electrical connections could result in transmission of false signals to the operator which could, in turn, adversely affect safe operation of the plant. We therefore conclude that the subject deficiency is reportable in accordance with 10CFR50.55(e).

Corrective Action One Hundred Eighteen (118) affected Tobar pressure trans'nitters will be reworked by removing the connections at the terminal blocks and making the regilired parallel butt splices in accord-ance with Bechtel Dwg. No. E-1408-0 (Wire and Cable - No os and Details).

Discrepancy Report SE-86-002 and Startup Deviation Reports EA-0740, EA-C756, EG-0776, GJ-0302, GS-0468, GS-0476, KP-0019, GU-0590 and GU-0592 have been issued to document and control this rework. This work will be completed prior to fuel load.

Sincerely, C Office of Inspection and Enforcement

-Division of Reactor Construction Inspection Washington, D. C. 20555 NRC Resident Inspector P. O. Box 241 Hancocks Bridge, NJ 08038 Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, GA 30339