05000282/FIN-2009005-04
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | 12 Circulating Water Pump Trip and Unit 1 Automatic Reactor Trip |
| Description | A self-revealed finding of very low safety significance was identified on May 18, 2009, due to the licensees failure to replace an electrical cable associated with the 12 circulating water pump after identifying that the cable was susceptible to failure. Consequently, the electrical cable failed and the sequence of events that followed resulted in a Unit 1 automatic reactor trip. Corrective actions for this issue included replacing the electrical cabling for the 12 circulating water pump and scheduling the cable replacements for other susceptible components. No violation of NRC requirements occurred. This finding was determined to be more than minor because it was associated with the protection against external factors and the equipment performance attributes of the Initiating Events cornerstone. In addition, the finding impacted the cornerstone objective of limiting the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as at power operations. The inspectors determined that this finding was of very low safety significance because the finding did not contribute to both the likelihood of a reactor trip and the likelihood that mitigating equipment would not be available. The inspectors concluded that this issue was cross-cutting in the Human Performance, Decision Making area, because the licensee failed to use conservative assumptions during their decisions regarding the need for cable replacements even after receiving numerous pieces of operating experience information (H.1.(b)). (Section 4OA3.2 |
| Site: | Prairie Island  |
|---|---|
| Report | IR 05000282/2009005 Section 4OA3 |
| Date counted | Dec 31, 2009 (2009Q4) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | R Jickling M Phalen K Stoedter L Haeg P Zurawski D Betancourt F Tran C Tilton |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
| ' | |
Finding - Prairie Island - IR 05000282/2009005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Prairie Island) @ 2009Q4
Self-Identified List (Prairie Island)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||