05000266/FIN-2008009-06
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Finding | |
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| Title | Concerns with Analysis Supporting the EDG Tank Fuel Volume of 11,000 Gallons |
| Description | The team identified an unresolved item relating to the licensee=s analysis to support the minimum fuel oil for the EDGs. Specifically, the analysis considered only one EDG running; however, it is possible that two EDGs could be operating : The team reviewed calculation N-94-142, Revision 4, entitled Emergency Diesel Generator, Gas Turbine, and Fire Pump Diesel Engine Fuel Oil Systems. The team identified that the calculation did not consider the most limiting condition of operation when it concluded that 11,000 gallon quantity of fuel was necessary for one EDG operation for 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> at rated load. The team noted that the calculation used design inputs of fuel consumption for only one EDG running which is contrary to the plant=s design operational logic for a loss of offsite power that requires all EDGs to start and run. The two Train A EDGs are G-01 and G-02 and are normally aligned as standby emergency power: G-01 to the Unit 1 Train A bus (1A-05) and G-02 to the Unit 2 Train A bus (2A-05). Both G-01 and G-02 draw fuel oil from tank T-175A. Therefore, on a loss of offsite power, both of these EDGs will draw fuel from tank T-175A. The team determined that this more limiting scenario was not used to determine the LCO acceptance criteria. Subsequent to a loss of offsite power, both EDGs will continue to run until offsite power is restored and/or conditions permit securing an EDG train with no load demand. AR 01132085 was initiated to address this issue. This issue is unresolved pending further NRC review of the licensing basis for the 11,000 gallon limiting condition for operation. Specifically, the team was concerned that the analysis for the limiting condition for operation as defined in TS 3.8.3 was not the limiting condition. (URI 05000266/2008009-06; 05000301/ 2008009-06 (DRS)) |
| Site: | Point Beach  |
|---|---|
| Report | IR 05000266/2008009 Section 1R21 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | URI: Green |
| cornerstone | Other |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | R Ruiz J Jandovitz J Jacobson M Kunowski N Feliz-Adomod Reeserj Chiloyan A Stone C Edwards J Penchison Z Falevits M Munira Stonec Edwards D Reeser J Chiloyan J Penchison M Munir Z Falevits |
| INPO aspect | |
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Finding - Point Beach - IR 05000266/2008009 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Point Beach) @ 2008Q3
Self-Identified List (Point Beach)
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