05000327/FIN-2010002-01
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Reactor Trip due to Inadequate Configuration Control |
| Description | A self-revealing finding was identified for two examples of the licensees failure to follow station procedures. The licensee failed to follow work order instructions to ensure two valves associated with the main feedwater pump turbine seal steam supply standpipe level switch were placed in their required positions following maintenance. Additionally, the licensee subsequently failed to follow requirements for procedure use and adherence when implementing a system operating procedure step to ensure the main feedwater pump turbine gland steam supply drain valves were in their required positions. This resulted in a manual reactor trip of Unit 2 due to indications of a loss of main feedwater pump turbine condenser vacuum. The licensee entered this event into their corrective action program as PER 209482.The finding was determined to be greater than minor because it was associated with the configuration control attribute of the initiating events cornerstone and affected the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions. Using Inspection IMC 0609, Significance Determination Process, Attachment 4, Phase 1 - Initial Screening and Characterization of Findings, the finding was determined to have very low safety significance (Green) because it did not contribute to both the likelihood of a reactor trip and the likelihood that mitigating systems will not be available. The cause of this finding was determined to have a cross-cutting aspect in the area of human performance associated with the work practices component. The causes associated with the failures to follow procedures were directly related to inadequate implementation of human error prevention techniques such as self and peer checking, proper documentation of activities, and not proceeding in the face of uncertainty or unexpected circumstances |
| Site: | Sequoyah  |
|---|---|
| Report | IR 05000327/2010002 Section 4OA3 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | C Kontz W Deschaine E Guthrie C Young M Speck R Carrion R Baldwin |
| CCA | H.12, Avoid Complacency |
| INPO aspect | QA.4 |
| ' | |
Finding - Sequoyah - IR 05000327/2010002 | |||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Sequoyah) @ 2010Q1
Self-Identified List (Sequoyah)
| |||||||||||||||||||||||||||||||||||||||||||||||