ENS 40344
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ENS Event | |
|---|---|
16:20 Nov 20, 2003 | |
| Title | Low Voltage Circuit Breaker Defect and Noncompliance Report |
| Event Description | Deviation related to upper stud assemblies for General Electric Nuclear AKR-30 low voltage circuit breakers. The deviation is specific to upper stud assemblies supplied under part number Q139C4632G1 and consist of an incorrect angle between the stud and pivot. Of the fifteen assemblies supplied with possible deviations to AmerenUE, five were returned and ten had been installed in Callaway Plant. The deviation will not prevent the circuit breakers from performing their design basis function at the Callaway Plant, however, the capability of the assemblies is indeterminate for severe faulted conditions. A circuit breaker could fail if an upper stud assembly with identified deviation was installed and the circuit breaker was called upon to interrupt a severe fault.
Callaway has concluded that this deviation does not constitute a "defect" as defined in 10CFR Part 21 because the breakers would still perform their design basis requirements and would not create a substantial safety hazard. However, Callaway can not determine if the potential for a significant safety hazard or exceeding of a technical specification safety limit could exist at another nuclear power plant. Received written documentation that the licensee has notified the NRC resident inspector. |
| Where | |
|---|---|
Callaway  Missouri (NRC Region 4) | |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+-4.15 h-0.173 days <br />-0.0247 weeks <br />-0.00568 months <br />) | |
| Opened: | David M Epperson 12:11 Nov 20, 2003 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Nov 20, 2003 |
| 40344 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Callaway with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation | |
WEEKMONTHYEARENS 426582006-06-19T21:00:00019 June 2006 21:00:00
[Table view]10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Initial Part 21 Notification - Prime Measurement Products, Models 763 and 763A Gage Pressure Transmitters and Model 764 Differential Pressure Transmitters ENS 421512005-11-17T14:30:00017 November 2005 14:30:00 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Initial Part 21 Notification - Prime Measurement Products, Models 763 & 763A Pressure Transmitters and Model 764 Differential Pressure Transmitters ENS 403442003-11-20T16:20:00020 November 2003 16:20:00 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Low Voltage Circuit Breaker Defect and Noncompliance Report ENS 402832003-10-29T06:00:00029 October 2003 06:00:00 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation 10 Cfr 21 Notification for Ge Magne-Blast Breaker Tube and Piston Assemblies 2006-06-19T21:00:00 | |
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