ENS 42552: Difference between revisions
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| event date = 05/04/2006 14:30 EDT | | event date = 05/04/2006 14:30 EDT | ||
| last update date = 05/04/2006 | | last update date = 05/04/2006 | ||
| title = 24-Hour Condition | | title = 24-Hour Condition of License Report Involving Fire Protection Plan Violation | ||
| event text = The Perry Nuclear Power Plant (PNPP) Operating License requires that a report be made within 24 hours to the NRC operations center via the emergency notification system in the event that a violation of the PNPP Fire Protection Program occurs. On May 2, 2006, it was discovered that a specific set of Division 1 Emergency Diesel Generator (EDG) Control Room Control Switch contacts were not designed to isolate the Control Room from the local Division 1 EDG controls in the event of a control room fire. At 1430 on May 4, 2006 it was determined that this deficiency violated the PNPP fire protection program and could adversely affect plant shutdown in the case of a control room fire. A potential fire induced hot short in the diesel generator logic circuit(s), may result in a failure to start or a spurious trip of the Diesel Generator even if control is transferred to remote control. Although repairs and operator actions could have been taken to restore the Division 1 EDG if the Control Room fire caused a failure to start or a spurious trip of the Diesel Generator, these activities were not specifically identified in the Fire Protection safe shutdown analysis or associated operating procedures. The ability to achieve and maintain safe shutdown in the event of a fire in the Unit 1 Control Room could be adversely affected. Compensatory actions (procedure changes) have been completed to address this issue. A written report will follow in accordance with Technical Specification 5.6.6.a and Operating License Condition 2.F. | | event text = The Perry Nuclear Power Plant (PNPP) Operating License requires that a report be made within 24 hours to the NRC operations center via the emergency notification system in the event that a violation of the PNPP Fire Protection Program occurs. On May 2, 2006, it was discovered that a specific set of Division 1 Emergency Diesel Generator (EDG) Control Room Control Switch contacts were not designed to isolate the Control Room from the local Division 1 EDG controls in the event of a control room fire. At 1430 on May 4, 2006 it was determined that this deficiency violated the PNPP fire protection program and could adversely affect plant shutdown in the case of a control room fire. A potential fire induced hot short in the diesel generator logic circuit(s), may result in a failure to start or a spurious trip of the Diesel Generator even if control is transferred to remote control. Although repairs and operator actions could have been taken to restore the Division 1 EDG if the Control Room fire caused a failure to start or a spurious trip of the Diesel Generator, these activities were not specifically identified in the Fire Protection safe shutdown analysis or associated operating procedures. The ability to achieve and maintain safe shutdown in the event of a fire in the Unit 1 Control Room could be adversely affected. Compensatory actions (procedure changes) have been completed to address this issue. A written report will follow in accordance with Technical Specification 5.6.6.a and Operating License Condition 2.F. | ||
The licensee discovered this discrepancy while researching a modification. This condition has existed since 1987. | The licensee discovered this discrepancy while researching a modification. This condition has existed since 1987. | ||
Latest revision as of 21:18, 1 March 2018
| Where | |
|---|---|
Perry  Ohio (NRC Region 3) | |
| Reporting | |
| Other Unspec Reqmnt | |
| LER: | 05000440/LER-2006-003 |
| Time - Person (Reporting Time:+-1.18 h-0.0492 days <br />-0.00702 weeks <br />-0.00162 months <br />) | |
| Opened: | Tony Kledzik 17:19 May 4, 2006 |
| NRC Officer: | Steve Sandin |
| Last Updated: | May 4, 2006 |
| 42552 - NRC Website
| |