ENS Event | |
|---|---|
18:25 Feb 13, 2020 | |
| Title | Technical Specification Required Shutdown |
| Event Description | On February 13, 2020, at 1025 hours0.0119 days <br />0.285 hours <br />0.00169 weeks <br />3.900125e-4 months <br /> [PST], during the performance of the quarterly control rod exercise surveillance test, Shutdown Bank 'B' Group 1 became misaligned greater than 12 steps from its group demand position. In accordance with Technical Specification 3.1.4, 'Rod Group Alignment Limits,' Action D, a Unit 2 shutdown to Mode 3 was commenced at 1233 hours0.0143 days <br />0.343 hours <br />0.00204 weeks <br />4.691565e-4 months <br />. Investigation into the cause of the rod bank misalignment is in progress.
There is no impact to the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. |
| Where | |
|---|---|
Diablo Canyon  California (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-1.13 h-0.0471 days <br />-0.00673 weeks <br />-0.00155 months <br />) | |
| Opened: | John Whetsler 17:17 Feb 13, 2020 |
| NRC Officer: | Kerby Scales |
| Last Updated: | Feb 13, 2020 |
| 54524 - NRC Website
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