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

10 CFR 50.73 +, 10 CFR 50.73#a2 +, 10 CFR 50.73#a2ivA +, 10 CFR 50.72#b2ivB +  and 10 CFR 50.72#a1i +

05000317  +  and 00317  +

Exelon +, Calvert Cliffs 3 Nuclear Project +, Costanzo C +  and EDF Development +

05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +, 05000317/LER-2011-001, For Calvert Cliffs, Unit 1, Regarding Reactor Trip Due to a Phase-to-Phase Short Circuit on Main Transformer +...

9.259259e-4 d (0.0222 hours, 1.322751e-4 weeks, 3.044e-5 months)  +  and 5.787037e-5 d (0.00139 hours, 8.267196e-6 weeks, 1.9025e-6 months)  +

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

EOP-1 +, EOP-0 +  and Emergency Operating Procedure +

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) +, 10 CFR 50.73(a)(2)(viii)(A) +  and 10 CFR 50.73(a)(2)(viii)(B) +

Maryland +  and Washington +

Emergency Diesel Generator +, Main Transformer +  and Control Rod +

Document Control Desk +  and Office of Nuclear Reactor Regulation +

High winds +  and Arc flash +

https://lersearch.inl.gov/Index.aspx?Page=PDFView?Doc::3172011001R00.pdf  +  and http://pbadupws.nrc.gov/docs/ML1129/ML11297A113.pdf  +