ENS 42487: Difference between revisions
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| event date = 04/10/2006 12:33 MST | | event date = 04/10/2006 12:33 MST | ||
| last update date = 04/10/2006 | | last update date = 04/10/2006 | ||
| title = Unit 2 Entered | | title = Unit 2 Entered a Ts Required Shutdown Due to Inoperable Auxiliary Feedwater Pumps | ||
| event text = The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73. | | event text = The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73. | ||
On April 10. 2006, at approximately 12:33 hours Mountain Standard Time (MST), Palo Verde Nuclear Generating Station (PVNGS) Unit 2 commenced a reactor shutdown required by Technical Specification [TS] 3.7.5 Condition C. Limiting Condition for Operability (LCO) 3.7.5 requires three AFW trains to be Operable. Condition A of this LCO provides allowance for one steam supply to the turbine driven AFW to be inoperable for a 7 day period. If the inoperable SGAUV138A valve is not restored to an operable condition within 7 days, Unit 2 will be required to shutdown to Mode 3 in 6 hours and to Mode 4 in 12 hours, starting at 10:41 MST on April 10, 2006. | On April 10. 2006, at approximately 12:33 hours Mountain Standard Time (MST), Palo Verde Nuclear Generating Station (PVNGS) Unit 2 commenced a reactor shutdown required by Technical Specification [TS] 3.7.5 Condition C. Limiting Condition for Operability (LCO) 3.7.5 requires three AFW trains to be Operable. Condition A of this LCO provides allowance for one steam supply to the turbine driven AFW to be inoperable for a 7 day period. If the inoperable SGAUV138A valve is not restored to an operable condition within 7 days, Unit 2 will be required to shutdown to Mode 3 in 6 hours and to Mode 4 in 12 hours, starting at 10:41 MST on April 10, 2006. | ||
Latest revision as of 21:18, 1 March 2018
| Where | |
|---|---|
Palo Verde  Arizona (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-3.9 h-0.163 days <br />-0.0232 weeks <br />-0.00534 months <br />) | |
| Opened: | Allan Briese 15:39 Apr 10, 2006 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Apr 10, 2006 |
| 42487 - NRC Website
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