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Letter, Licensee Event Report (LER)  and Licensee Event Report

10 CFR 50.73 +  and 10 CFR 50.73#a2iB +

05000499  +  and 00499  +

Peter L +  and South Texas +

05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +, 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +  and 05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A +

0.0143 d (0.343 hours, 0.00204 weeks, 4.699175e-4 months)  +, 6.944444e-5 d (0.00167 hours, 9.920635e-6 weeks, 2.283e-6 months)  +, 3.472222e-4 d (0.00833 hours, 4.960317e-5 weeks, 1.1415e-5 months)  +, 0.0144 d (0.346 hours, 0.00206 weeks, 4.737225e-4 months)  +, 0.0162 d (0.389 hours, 0.00231 weeks, 5.327e-4 months)  +, 0.0197 d (0.472 hours, 0.00281 weeks, 6.4685e-4 months)  +, 0.0119 d (0.286 hours, 0.0017 weeks, 3.91915e-4 months)  +, 1.157407e-5 d (2.777778e-4 hours, 1.653439e-6 weeks, 3.805e-7 months)  +  and 9.259259e-5 d (0.00222 hours, 1.322751e-5 weeks, 3.044e-6 months)  +

NRC Form 366, Licensee Event Report +  and NRC Form 366A +

10 CFR 50.73(a)(2)(iv)(A), System Actuation +, 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition +, 10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor +, 10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat +, 10 CFR 50.73(a)(2)(v), Loss of Safety Function +, 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability +, 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications +, 10 CFR 50.73(a)(2)(i) +, 10 CFR 50.73(a)(2)(x) +, 10 CFR 50.73(a)(2)(ii)(A), Seriously Degraded +, 10 CFR 50.73(a)(2)(iii) +, 10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown +, 10 CFR 50.73(a)(2)(ix)(A), Prevented Safety Function in Multiple System +, 10 CFR 50.73(a)(2)(viii)(A) +  and 10 CFR 50.73(a)(2)(viii)(B) +

TS-3.7.4 +  and TS-3.8.1.1 +

Document Control Desk +  and Office of Nuclear Reactor Regulation +

https://lersearch.inl.gov/Index.aspx?Page=PDFView?Doc::4992010004R00.pdf  +  and http://pbadupws.nrc.gov/docs/ML1036/ML103630407.pdf  +