ENS Event | |
|---|---|
03:57 Jul 29, 2016 | |
| Title | Temporary Loss of Power to the Emergency Condenser |
| Event Description | On 7/28/2016 at 2357 EDT, Nine Mile Point Nuclear Station Unit 1 experienced a fault in the in-service 11 RPS UPS [Reactor Protective System Ultimate Power Supply], resulting in an isolation of both emergency condensers. Emergency condenser 12 was returned to standby on 7/29/2016 at 0041 EDT and emergency condenser 11 was returned to standby on 7/29/2016 at 0045 EDT.
This 8-hour non-emergency report is being made based upon requirements of 10CFR50.72(b)(3)(v)(B) which states, 'Licensee shall notify the NRC of any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to: (B) Remove residual heat.' The state of New York and the NRC Senior Resident Inspector were informed. |
| Where | |
|---|---|
Nine Mile Point  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat | |
| Time - Person (Reporting Time:+2.9 h0.121 days <br />0.0173 weeks <br />0.00397 months <br />) | |
| Opened: | Don Crisp 06:51 Jul 29, 2016 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Jul 29, 2016 |
| 52133 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 554922021-09-25T07:42:00025 September 2021 07:42:00
[Table view]10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat Loss of Uninterruptible Power Supply Resulted in Isolation of Two Emergency Condensers ENS 521332016-07-29T03:57:00029 July 2016 03:57:00 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat Temporary Loss of Power to the Emergency Condenser ENS 439902008-02-16T00:02:00016 February 2008 00:02:00 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Potential Inoperability of Emergency Core Cooling Systems Due to an Unalalyzed Condition 2021-09-25T07:42:00 | |