ENS 44312
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ENS Event | |
|---|---|
18:13 Jun 16, 2008 | |
| Title | Replacement Breaker Charging Motors Failed Minimum Voltage Test |
| Event Description | Event: On June 16, 2008, Duke Energy (Duke) completed a reportability determination which concluded that a defect associated with 10 electric charging motors for breakers is reportable under Part 21. This is a legacy issue from May 22, 2000, which was re-evaluated as a result of an assessment of Oconee's Part 21 processes. The motors were procured as safety-related from Asea Brown Boveri (ABB) (Florence, SC location) on February 22, 2000, ABB Part# 709799T11. The motors were received on March 9, 2000 and subsequently, breaker personnel identified the part number on the replacement motors did not agree with the existing motors. When installed in a breaker for testing, the replacement motors did not function at the required minimum 90VDC. Duke will provide follow up written notification within 30 days pursuant to Part 21.21(d)(3)(ii).
Initial Safety Significance: None. The motors were never placed in service. However, the evaluation concluded because of the safely related applications for which the motors were intended, the defect could have resulted in a significant safety hazard had the motor(s) been placed in service. The licensee verified that this part was not used at other Duke nuclear plants. The licensee notified the NRC Resident Inspector and the ABB Project Manager for Oconee. |
| Where | |
|---|---|
| Oconee South Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+160.8 h6.7 days <br />0.957 weeks <br />0.22 months <br />) | |
| Opened: | Bob Meixell 11:01 Jun 23, 2008 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Jun 23, 2008 |
| 44312 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Oconee | |
WEEKMONTHYEARENS 465542011-01-06T22:02:0006 January 2011 22:02:00
[Table view]10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Foreign Material Found in Spare Heat Exchanger ENS 463752010-10-28T16:40:00028 October 2010 16:40:00 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Defect Discovered in Tube Steel That Could Be Used in Various Safety Related Structual Applications ENS 443122008-06-16T18:13:00016 June 2008 18:13:00 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Replacement Breaker Charging Motors Failed Minimum Voltage Test ENS 435582007-08-07T20:00:0007 August 2007 20:00:00 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Part 21 - Two Commerical Grade Relays Contained Deficiencies ENS 428932003-01-02T04:00:0002 January 2003 04:00:00 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Part 21 Notification - Voids in Plate Steel 2011-01-06T22:02:00 | |
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