05000454/FIN-2008004-01
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Finding | |
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Title | Isolating Carbon Dioxide Fire Suppression System in Upper Cable Spreading Rooms Without Prior NRC Approval |
Description | A finding of very low safety significance and an associated Non-Cited Violation (NCV) of Byron Unit 1 Operating License Condition 2.C (6) and Byron Unit 2 Operating License Condition 2.E was identified for the licensees failure to obtain NRC approval before making changes to the fire protection program. Specifically, the licensee isolated the manual carbon dioxide (CO2) suppression system to the upper cable spreading rooms (UCSR) without prior NRC approval. The licensee entered this issue in the corrective action program and implemented compensatory action to verify detection system operability. In addition the licensee plans to submit a license change request associated with the removal of CO2 suppression from the UCSR. The finding was determined to be more than minor because the inspectors could not reasonably determine that the isolation would not have ultimately required NRC prior approval. The inspectors determined this finding to be of very low safety significance (Green) based on a Phase 2 SDP evaluation. This finding is related to the cross-cutting area of Human Performance for failure to use conservative assumptions in decision making and to adopt a requirement that demonstrates the proposed action is safe in order to proceed with respect to reviewing the plant design and license basis. (H.1(b)) (Section 1R05.1.b) |
Site: | Byron ![]() |
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Report | IR 05000454/2008004 Section 1R05 |
Date counted | Sep 30, 2008 (2008Q3) |
Type: | NCV: Green |
cornerstone | Initiating Events |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.05 |
Inspectors (proximate) | D Mcneil R Ng C Thompson B Bartlett R Walton |
CCA | H.14, Conservative Bias |
INPO aspect | DM.2 |
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Finding - Byron - IR 05000454/2008004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2008Q3
Self-Identified List (Byron)
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