ENS Event | |
|---|---|
05:00 Oct 23, 2015 | |
| Title | Part 21 - Westinghouse Type Kir-60 Current Transformer |
| Event Description | The following is excerpted from LER 2015-007 submitted by the licensee (see related EN#51348):
On October 9, 2015, Waterford 3 received information from the external evaluation concerning the Generator Differential Current Transformer. The evaluation concluded that a manufacturing defect internal to the current transformer was the cause of the failure. On October 22, 2015, engineering evaluation determined the manufacturing defect could create a substantial safety hazard, as defined in 10 CFR 21, and provided the site vice president information of the defect the same day. Additional information identified in the report is as follows: Constructor - Westinghouse Type KIR-60 current transformer, style 7524A01G16, serial number 28218571; Defect and safety hazard - There were voids found in the insulation, and the thickness of the insulation material around the fault area appeared reduced when compared to the other areas of the current transformer. There is only one transformer of this type remaining installed in the plant. Scheduled replacement is no later than November 15, 2015. |
| Where | |
|---|---|
Waterford  Louisiana (NRC Region 4) | |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+7.07 h0.295 days <br />0.0421 weeks <br />0.00968 months <br />) | |
| Opened: | Scott Meiklejohn 12:04 Oct 23, 2015 |
| NRC Officer: | Daniel Mills |
| Last Updated: | Oct 23, 2015 |
| 51492 - NRC Website
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Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 548272020-08-03T21:59:0003 August 2020 21:59:00
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