ENS Event | |
|---|---|
08:00 Sep 8, 2016 | |
| Title | Technical Specification Shutdown Due to Loss of Residual Heat Removal Pump |
| Event Description | On September 4, 2016 at 0258 [CDT], Grand Gulf Nuclear Station entered three [Technical Specification] Limiting Conditions for Operations (LCOs) due to residual heat removal pump 'A' (RHR 'A') being declared inoperable.
LCOs entered: 1) 3.5.1 for one low pressure ECCS injection/spray subsystem, 2) 3.6.1.7 for one RHR containment spray subsystem, and 3) 3.6.2.3 for one RHR suppression pool cooling subsystem. Station management has made the decision to shutdown the plant to repair the RHR 'A' pump prior to the end of the 7 day LCO completion time based on troubleshooting and testing performed on the RHR 'A' pump. Grand Gulf Nuclear Station initiated plant shutdown required by Tech Spec Actions 3.5.1, 3.6.1.7, and 3.6.2.3, at 0300 CDT on 09/08/2016 due to expected inability to restore RHR 'A' to operable status prior to exceeding the LCO time of 7 days. The unit is currently at 82 percent power. There are no other systems out of service that would complicate the orderly shutdown to Mode 4. The licensee will notify the NRC Resident Inspector. |
| Where | |
|---|---|
Grand Gulf  Mississippi (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| LER: | 05000416/LER-2016-007 Regarding Technical Specification Shutdown Due to Loss of Residual Heat Removal Pump |
| Time - Person (Reporting Time:+-3.55 h-0.148 days <br />-0.0211 weeks <br />-0.00486 months <br />) | |
| Opened: | Sean Dunfee 04:27 Sep 8, 2016 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Sep 8, 2016 |
| 52225 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (82 %) |
WEEKMONTHYEARENS 560592022-08-20T04:42:00020 August 2022 04:42:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 529362017-08-29T17:00:00029 August 2017 17:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 522252016-09-08T08:00:0008 September 2016 08:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Shutdown Due to Loss of Residual Heat Removal Pump 2022-08-20T04:42:00 | |