05000305/FIN-2007004-01
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Finding | |
|---|---|
| Title | Auxiliary Building Heating and Ventilation Calculations Potentially Unconservative |
| Description | The inspectors identified an unresolved item (URI) associated with potentially inoperable Technical Specification (TS) related equipment due to support system unavailability and related calculational issues. Discussion: On August 17, 2007, the daily work schedule indicated that an administrative limiting condition for operation was planned for work associated with the auxiliary building fan coil units. The inspectors inquired about the basis for the administrative limiting condition for operation and found that the related calculations indicated that under certain post-accident combinations of pump and room cooler operation that the coolers may not be fully capable of removing the heat from the system. As a result, the inspectors selected the associated fan coil unit to review as a sample for heat sink performance. During the inspectors reviews, it appeared that certain combinations of room coolers and equipment did not support operability of equipment as defined by TSs. Additionally, when the licensee was questioned about requirements for entry into related limiting conditions for operation, they referenced a letter to another licensee which Kewaunee had not made Kewaunee-specific through the 10 CFR 50.59 process or an amendment request. The inspectors concluded that the application of non-license specific information to the operation of Kewaunee was a performance deficiency. Additionally, the licensees related Calculation, C11157, Auxiliary Building Basement Post Accident Heat Gain, dated May 26, 2007, predated the specified letter, as such, the failure of the licensee to recognize the TS implications at the time of the development of the calculations was also a performance deficiency. 9 Enclosure As a result of procedural changes that came about after the inspectors inquires and of other auxiliary building issues that existed with the mezzanine room coolers, the on-site safety review committee requested that engineering review all calculations for auxiliary building ventilation. Because the continuing reviews identified other room cooling issues that could impact the operability of safety-related equipment, the inspectors considered this issue unresolved pending the licensees finalization of related calculations and possible submittal of any related licensee event reports (LERs) |
| Site: | Kewaunee  |
|---|---|
| Report | IR 05000305/2007004 Section 1R07 |
| Date counted | Sep 30, 2007 (2007Q3) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.07 |
| Inspectors (proximate) | C Zoia N Valos S Sheldon C Brown H Campbell F Baxter M Jones A Stonej Tappr Langstaff R Winter J Cassidy P Higgins S Burton J Bartleman K Barclay |
| INPO aspect | |
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Finding - Kewaunee - IR 05000305/2007004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Kewaunee) @ 2007Q3
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