ENS 51436: Difference between revisions
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StriderTol (talk | contribs) (Created page by program invented by Mark Hawes) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
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| event date = 10/01/2015 09:06 CDT | | event date = 10/01/2015 09:06 CDT | ||
| last update date = 10/01/2015 | | last update date = 10/01/2015 | ||
| title = Mode Change | | title = Mode Change with Turbine Trip Leads Lifted | ||
| event text = At 0906 [CDT], it was determined that U1 [Unit 1] was in a condition that could have prevented fulfillment of the turbine trip safety function and TS [Tech Spec] 3.0.3 was entered. Leads had been lifted to disable the turbine trip function on both SSPS [Solid State Protection System] trains while U1 was in Mode 4 (which is outside the mode of applicability). However, at 0059 [CDT], U1 entered Mode 3 with these leads still lifted. In Mode 3, both trains of the turbine trip function are required to be operable per TS 3.3.2. The turbine was subsequently tripped at 0932 [EDT] and the leads were re-landed enabling the turbine trip function at 0946 [CDT], TS 3.0.3 was subsequently exited. This condition is being reported in accordance with 10 CFR 50.72 (b)(3)(v)(D) for an event or condition that could have prevented the fulfillment of a safety function to mitigate the consequences of an accident. | | event text = At 0906 [CDT], it was determined that U1 [Unit 1] was in a condition that could have prevented fulfillment of the turbine trip safety function and TS [Tech Spec] 3.0.3 was entered. Leads had been lifted to disable the turbine trip function on both SSPS [Solid State Protection System] trains while U1 was in Mode 4 (which is outside the mode of applicability). However, at 0059 [CDT], U1 entered Mode 3 with these leads still lifted. In Mode 3, both trains of the turbine trip function are required to be operable per TS 3.3.2. The turbine was subsequently tripped at 0932 [EDT] and the leads were re-landed enabling the turbine trip function at 0946 [CDT], TS 3.0.3 was subsequently exited. This condition is being reported in accordance with 10 CFR 50.72 (b)(3)(v)(D) for an event or condition that could have prevented the fulfillment of a safety function to mitigate the consequences of an accident. | ||
The Byron NRC site Resident Inspector has been notified of this condition. | The Byron NRC site Resident Inspector has been notified of this condition. | ||
Latest revision as of 20:46, 1 March 2018
| Where | |
|---|---|
Byron  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| LER: | 05000454/LER-2015-006 |
| Time - Person (Reporting Time:+0.53 h0.0221 days <br />0.00315 weeks <br />7.25994e-4 months <br />) | |
| Opened: | Greg Gugle 14:38 Oct 1, 2015 |
| NRC Officer: | Daniel Mills |
| Last Updated: | Oct 1, 2015 |
| 51436 - NRC Website
| |
Byron with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |