05000321/FIN-2012005-03
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Finding | |
|---|---|
| Title | Installation of a transformer for the TSC cooling coil and condensing unit control circuit not adequately designed to provide full system load |
| Description | A self-revealing NCV of 10 CFR Part 50.54(q)(2), was identified when the licensee failed to maintain an adequate on-site Technical Support Center (TSC) to support emergency response. The violation existed from November 10 to December 22, 2011, when the TSC ventilation system was returned to service following a modification which replaced the TSC air conditioning cooling coils and condensing unit. During the modification, the control circuit transformer for the new cooling coil and condensing unit was not adequately sized to provide full system load. This resulted in a loss of the TSC air conditioning climate control system on December 21, 2011, when the undersized transformer tripped on thermal overload. The licensee replaced the undersized transformer with a properly sized transformer and entered this issue into their corrective action program as CR 386124. The licensees installation of a transformer for the TSC cooling coil and condensing unit control circuit that was not adequately designed to provide full system load was a performance deficiency. On December 21, 2011, this failure directly led to the licensee failing to meet 10 CFR 50.47(b)(8) which requires, in part, that adequate emergency facilities to support the emergency response are provided and maintained. The licensee failed to identify the undersized transformer design deficiency during both their modification documentation reviews and post modification testing. The performance deficiency was more than minor in accordance with IMC 0612, Appendix B, Issue Screening, dated September 7, 2012, because it is associated with the Facilities and Equipment attribute and adversely affected the Emergency Preparedness Cornerstone objective of ensuring the licensee is capable of implementing adequate measures to protect the health and safety of the public in the event of a radiological emergency. Specifically, with the cooling coil and condensing unit control circuit transformer in a tripped condition the TSC is non-functional per the sites Technical Requirements Manual. This finding was evaluated in accordance with IMC 0609, Appendix B, Emergency Preparedness Significance Determination Process, dated February 24, 2012. Utilizing Attachment 2 of IMC 0609, Appendix B, the inspectors determined the finding is associated with planning standard function 10 CFR 50.47(b)(8) Emergency Facilities and Equipment, which is not a risk-significant planning standard. Therefore the first two blocks (Loss of Risk Significant Planning Standard and Risk Significant Planning Standard Degraded Function) were answered, no . The inspectors determined there was not a loss of the (b)(8) planning standard function, because the transformer was able to be reset, restoring air conditioning to the TSC, and key emergency response members would have been able to perform their assigned emergency plan function. Therefore per the flowchart this violation screened as Green. The finding has a cross cutting aspect in the resource component of the human performance area because DCP SNC330548, Remove/Replace Cooling Coil and Condensing Unit serving TSC (1X75-B001 and 1X75-B002), did not ensure the transformer for the cooling coil and condensing unit control circuit was designed to supply full control circuit load under high load demand. |
| Site: | Hatch  |
|---|---|
| Report | IR 05000321/2012005 Section 4OA5 |
| Date counted | Dec 31, 2012 (2012Q4) |
| Type: | NCV: Green |
| cornerstone | Emergency Prep |
| Identified by: | Self-revealing |
| Inspection Procedure: | |
| Inspectors (proximate) | D Berkshire F Ehrhardt W Loo J Laughlin M Miller M Speck B Caballero S Sandal E Morris D Hardage M Schwieg |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Hatch - IR 05000321/2012005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Hatch) @ 2012Q4
Self-Identified List (Hatch)
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