ENS Event | |
|---|---|
05:00 Mar 18, 2011 | |
| Title | Defective Kpr-14Dg-125 Relays Discovered During Bench Testing |
| Event Description | The following event description is based on information currently available. The condition is reported under 10 CFR 21.21(d)(3)(i).
Part 21 Report - Potter Brumfield KRP-14DG-125 Relays, supplied by Southern Testing Services (STS) division of Argo Turboserve Corporation (ATC). On March 17, 2011, during bench testing of the KRP-14DG-125 Relays, Fort Calhoun Station (FCS) discovered that some of these relays were defective in that one of the contacts would not close properly after energizing and de-energizing the relay coils. If installed in the plant, the improper closure of this contact could defeat the safety function of the relays that provide a signal to the component supported by that contact. This deviation from the design specifications is reportable per 10 CFR 21. FCS does not have any of the affected relays installed in the plant. FCS returned the batch of relays to the vendor for further failure modes and effects evaluation and reporting. FCS has not provided any of these relays from our stock to any other licensee. The vendor and the [NRC] Resident Inspector have been notified. |
| Where | |
|---|---|
Fort Calhoun  Nebraska (NRC Region 4) | |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+80.32 h3.347 days <br />0.478 weeks <br />0.11 months <br />) | |
| Opened: | Donna Guinn 13:19 Mar 21, 2011 |
| NRC Officer: | Charles Teal |
| Last Updated: | Mar 21, 2011 |
| 46688 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 466882011-03-18T05:00:00018 March 2011 05:00:00
[Table view]10 CFR 21.21 Defective Kpr-14Dg-125 Relays Discovered During Bench Testing 2011-03-18T05:00:00 | |