ML20030C926
| ML20030C926 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 08/17/1981 |
| From: | Martin T Public Service Enterprise Group |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8108280406 | |
| Download: ML20030C926 (2) | |
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Thomas J. Martin Public Service Electric and Gas Company 80 Park Plaza Newark, N.J. 07101 201/4304316 Vice President Engineering and Construction Nf August 17, 1981 2 719815y[
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Mr. Boyce H.
Grier, Director
.03 U.
S.
Nuclear Regulatory Commission vi Office of Inspection and Enforcement Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406
Dear Mr. Grier:
SIGNIFICANT CONSTRUCTION DEFICIENCY VARGLASS WIRE TIES NO. 1 AND 2 UNITS HOPE CREEK GENERATING STATION On July 17, 1981, a verbal report was made to Region 1, Office of Inspection and Enforcement representative, Mr.
L.
Briggs, advising of a potential significant construction de-ficiency.
The following report is submitted in accordance with the requirements of 10CFR50.55(e).
Description of the Deficiency Direct Current (DC) Motor Control Centers, manufactured by General Electric at Mebane, North Carolina, are assembled using Varglass wire ties around wire bundles.
The Varglass material tends to unravel and loosen resulting in the poten-tial of the wire ties falling between relay contacts, thereby inhibiting operation of safety related equipment.
Four (4) DC Motor Control units have been received at Hope Creek fron General Electric.
Analysis of Safety Implications As a result of the wire ties becoming loose, some of them could fall between relay contacts, preventing the relay (s) from closing.
This could prevent the DC powered pump discharge shutoff valve from opening on demand in the HPCI and RCIC systems.
Although the redundant Emergency Core Cooling System would assure safe shutdown of the facility, we cor. ider this condition reportable in accordance with f
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Boyce H.
Grier 8/17/81 Corrective Action General Electric has been advised to make the Varglass ties tight and to apply silicone scaler at the knot and also be-tween the knot and the cable so the knot does not slip or unravel.
One of the previously delivered units has already been re-turned to General Electric for repair of the wire ties.
A second unit is scheduled to be returned on or about Septem-bor 1, 1981.
The remaining two units on site will be in-spected by Bechtel and, if the same condition exists, they will be repaired by General Electric.
The inspections will be completed by September 4, 1981.
Bechtel's Supplier Quality Representative at the General Electric facility has been instructed to inspect all future shipments for proper securing of the ties.
Bechtel Engineering will check for use of Varglass ties from the other Hope Creek suppliers of safety related electrical switchgear and motor control centers.
This investigation will be completed by October 9, 1981.
'fhe above remedial action will be applied to any other suppliers using Varglass ties.
Documentation of the results of these actions will be avail-able on site for review by your inspectors.
Very truly yours, CC:
Office of Inspection and Enforcement Division of Reactor Construction Inspection Washington, DC NRC Resident Inspector - Hope Creek P.O. Box 241 Hancocks Bridge, NJ
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