05000298/FIN-2009002-05
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Finding | |
|---|---|
| Title | Control Room Envelope Door Left Open Results in Loss of Safety Function (Section 4OA3) |
| Description | A self-revealing noncited violation of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, occurred regarding the licensees failure to follow the requirements of Administrative Procedure 0.16, Control of Doors, when Door H200, both a fire door and a control room emergency filter system boundary door, was found open. The door had been left ajar when a security officer passed through the door and failed to self-check that it closed behind him. A plant operator found the door open when passing through 29 minutes later. Failure of the door to close resulted in the inoperability of the control room emergency filter system and a loss of safety function. The licensee entered this issue into their corrective action program as Condition Report CR-CNS-2008-08695. The finding was more than minor because it affected the configuration control attribute of the barrier integrity cornerstone to maintain radiological barrier functionality of the control room, and affected the cornerstone objective to ensure adequate protection of public health and safety from exposure to radioactive materials. This control room emergency filter system failure raised the possibility of control room personnel exceeding federal dose limits outlined in 10 CFR 50.67 or 10 CFR Part 50, Appendix A, General Design Criteria 19, if a release had occurred. Using Manual Chapter 0609.04, Phase 1 - Initial Screening and Characterization of Findings, the finding is determined to have very low safety significance because it only represented a degradation of the radiological barrier function provided for the control room and no release or exposure occurred during the loss of the control room envelope. The cause of this finding was related to the human performance crosscutting component of work practices because licensee failed to adequately communicate human error prevention techniques such as self checking door closure when passing through H.4(a) (Section 4OA3) |
| Site: | Cooper  |
|---|---|
| Report | IR 05000298/2009002 Section 4OA3 |
| Date counted | Mar 31, 2009 (2009Q1) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | N Taylor G Miller M Chambers M Bloodgood |
| CCA | H.12, Avoid Complacency |
| INPO aspect | QA.4 |
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Finding - Cooper - IR 05000298/2009002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Cooper) @ 2009Q1
Self-Identified List (Cooper)
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