ENS Event | |
|---|---|
05:00 Oct 9, 2013 | |
| Title | Part 21 - Failure of Relay Logic Card Modules in 2 Out of 4 Voters for Power Range Monitors |
| Event Description | The observed aging characteristics of the Solid State Relays on two particular Voter Relay Logic Cards Modules present a future challenge to the Power Range Neutron Monitoring System's ability to reliably insert the Average Power Range Monitor High-High/INOP scram and/or the Oscillating Power Range Monitor Scram to the Reactor Protection System in plant conditions warrant such action.
For Relay Logic Cards that have been in operation for over 10 years, Relay Logic Card Module replacement should be scheduled and accomplished at the first reasonable opportunity. For Relay Logic Cards in operation for less than 10 years, a program should be implemented to replace Relay Logic Card Modules before the 10 years is reached. Plant affected; Nine Mile Point 2, Fermi 2, Grand Gulf, Limerick 1 & 2, Peach Bottom 2 & 3, Susquehanna 1&2, Brunswick 1 & 2, Hatch 1 & 2, Browns Ferry 1, 2, & 3, Monticello, and Columbia. |
| Where | |
|---|---|
| Ge Hitachi Nuclear Energy Wilmington, North Carolina (NRC Region 1) | |
| Organization: | Ge Hitachi Nuclear Energy |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+1378.58 h57.441 days <br />8.206 weeks <br />1.888 months <br />) | |
| Opened: | Jim Harrison 16:35 Dec 5, 2013 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Dec 5, 2013 |
| 49610 - NRC Website | |
Ge Hitachi Nuclear Energy with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 553142021-02-18T04:00:00018 February 2021 04:00:00
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