ENS Event | |
|---|---|
23:14 Jan 17, 2012 | |
| Title | Unit 2 Commenced a Tech Spec Required Shutdown After Declaring Station Battery "B" Inoperable |
| Event Description | At approximately 1814 hours0.021 days <br />0.504 hours <br />0.003 weeks <br />6.90227e-4 months <br /> (EST) on January 17, 2012, H. B. Robinson Steam Electric Plant (HBRSEP), Unit No. 2, personnel confirmed that the Station Battery Performance Capacity Test (Five Year Interval), for station battery 'B' was not completed within its required periodicity plus grace period. Based upon this information, plant Operations personnel declared the 'B' battery inoperable and entered the required action for Improved Technical Specifications (ITS) 3.8.4, Condition 'A', which requires that the DC electrical power subsystem be restored to operable status in 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. At 2014 hours0.0233 days <br />0.559 hours <br />0.00333 weeks <br />7.66327e-4 months <br /> (EST), Operations personnel entered the required action for ITS 3.8.4, Condition 'B' due to required actions and associated completion time for Condition 'A' not met. Condition 'B' requires the unit to be in Mode 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> AND be in Mode 5 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.
This report is being made in accordance with 10 CFR 50.72(b)(2)(i) based on the initiation of a plant shutdown required by the Technical Specifications. Following the shutdown, the unit will commence a refueling outage that was originally scheduled to begin at 0000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> (EST) on January 21, 2012. The licensee informed the NRC Resident Inspector. |
| Where | |
|---|---|
Robinson  South Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-0.65 h-0.0271 days <br />-0.00387 weeks <br />-8.9037e-4 months <br />) | |
| Opened: | Joseph Todd 22:35 Jan 17, 2012 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Jan 17, 2012 |
| 47600 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (85 %) |
| After | Power Operation (85 %) |
WEEKMONTHYEARENS 547962020-07-21T12:51:00021 July 2020 12:51:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 476002012-01-17T23:14:00017 January 2012 23:14:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unit 2 Commenced a Tech Spec Required Shutdown After Declaring Station Battery "B" Inoperable 2020-07-21T12:51:00 | |