05000382/FIN-2010002-01
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Finding | |
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Title | Failure to Control Transient Combustibles |
Description | The inspectors identified five examples of a green noncited violation of Waterford Steam Electric Station, Unit 3s license condition 2.C.9 for the failure to perform a transient combustible evaluation prior to introducing transient combustibles into procedurally controlled vital plant areas. Specifically, procedures limit the amount of transient combustibles that may be introduced into the control room ventilation equipment room, the component cooling water Train B heat exchanger room, and the main steam isolation valve Train B roof area. Any amounts greater than the preset procedural limits require a transient combustible evaluation to be performed. In all five cases, this evaluation was not performed prior to introduction of the transient combustibles. This violation has been entered into the licensees corrective action program as condition reports CR-WF3-2010-0482, CR-WF3-2010-0598, and CR-WF3-2009-4035. The performance deficiencies associated with this violation were the failure to comply with Waterford Steam Electric Station, Unit 3s license condition 2.C.9. Specifically, the procedural requirements to perform a transient combustible evaluation prior to introducing the transient combustibles into designated fire zones were not performed. Since several of the previously described fire zones fail to meet 10 CFR50, Appendix R train separation requirements, use of Inspection Manual Chapter 0612, Appendix E to screen for minor examples is not appropriate. This condition is greater than minor because, if left uncorrected, it would become a more significant safety concern, since continued introduction of unevaluated transient combustible loading into controlled areas could significantly reduce the ability to achieve a safe shutdown condition, in the event of a fire in that controlled area. The inspectors evaluated the finding using Inspection Manual Chapter 0609, Appendix F, Fire Protection Significance Determination Process, to assess the safety significance. Since the severity of the observed deficiencies was assigned a low degradation rating, it was determined to be of very low risk significance. This finding had a crosscutting aspect in the area of human performance associated with the work practices component in that the licensee failed to utilize appropriate human error prevention techniques by (1) discussing transient combustible controls and expectations during pre-job briefs and (2) effectively utilizing human performance barriers, such as posted door signs H.4(a). (Section 1R05) |
Site: | Waterford ![]() |
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Report | IR 05000382/2010002 Section 1R05 |
Date counted | Mar 31, 2010 (2010Q1) |
Type: | NCV: Green |
cornerstone | Initiating Events |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.05 |
Inspectors (proximate) | J Clark D Overland S Sandal |
CCA | H.12, Avoid Complacency |
INPO aspect | QA.4 |
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Finding - Waterford - IR 05000382/2010002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Waterford) @ 2010Q1
Self-Identified List (Waterford)
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