ML20082R778
| ML20082R778 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 11/23/1983 |
| From: | Martin T Public Service Enterprise Group |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8312130298 | |
| Download: ML20082R778 (2) | |
Text
4 v-l Thomas J. Martin Public Service Electric and Gas Company 80 Park Plaza Newark, N.J. 07101 201/430-8316 Vice President Engineering and Construction November 23, 1983 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 DEFECTIVE AKR-30 CIRCUIT BREAKERS HOPE CREEK GENERATING STATION On October 26, 1983, a verbal report was made to Region I, Of fice of Inspection and Enforcement representative, Mr.
A.
- Finkel, advising of a potentially significant construction deficiency concerning defective parts in circuit breakers supplied by General Electric.
The following final report is' provided in accordance with the requirements of 10CFR50.55(e).
Description of the Problem Bechtel Power Corporation, our Architect / Engineer and Constructor, was informed by Service Advice Letter 175 9.11 from General Electric that electrically operated AKR-30 circuit breakers manufactured before May of 1980 may contain a defective switch and an improperly heat treated part which could result in the failure of the circuit breaker to close upon command.
Bechtel had purchased AKR-30 circuit breakers from General Electric under Purchase Orders No. 10855-E-ll7 (Q) and 108 55-E-121(Q) for AC and DC applications respectively.
General Electric and Bechtel have inspected 188 circuit breakers supplied under Purchase Order 10855-E-ll7(Q) and identified 107 breakers with defective switches in the control circuitry and 86 breakers with improperly heat treated closing spring props.
8312130298 831123 PDR ADOCK 05000354 S
PDR f>{O
Dr.
T.
E. Murley
-2 11/23/83 Corrective Action
'Under the guidance of' General Electric personnel, Bechtel will replace the defective switches and closing spring props in the identified AC circuit breakers at our Seabrook storage facility.
This work will be controlled and documented by Nonconformance Report No. 2627.
We anticipate that this work will be completed by December 30, 1983.
The 80 AKR-30 DC circuit breakers supplied under Purchase Order 10855-E-121(Q) were returned to General Electric's Plainville, Connecticut, facility for testing and/or rework on October 26, 1983.
Bechtel has issued a Quality Surveillance Assignment to provide inspection of the circuit breaker rework at that location.
Each breaker will be inspected by Bechtel prior to release from General Electric.
Safety Analysis Any of these circuit breakers could be installed in Class lE circuits that supply Class lE loads, which are needed for safe and orderly shutdown of the reactor, maintaining the plant in a safe shutdown condition, or mitigating the consequences of an accident.
The defective parts could have caused a failure of an AC or DC AKR-30 circuit breaker to close upon command, which could adversely affect the safe operation of the plant.
Therefere, this condition is considered reportable in accordance with 10CFR50.55(e).
Very truly yours, CC Office of Inspection and Enforcement Division of Reactor Construction Inspection Washington, D. C.
NRC Resident Inspector - Hope Creek P. O.
Box 241 Hancocks Bridge, NJ 08038
. -.