NRC CAL – NOV (White)

On April 30, 2013, the NRC issued a Notice of Violation to Exelon Generation Company, LLC(Three Mile Island) for a violation of 10 CFR 50, Appendix B, Criterion XVI, associatedwith a White Significance Determination Process finding involving Three MileIsland's failure to identify, during external flood barrier walk downs, thatelectrical cable conduit couplings in the Three Mile Island Nuclear Station,Unit 1 Air Intake Tunnel (AIT) were not sealed, as designed, to maintain theintegrity of the external flood barrier system. Specifically, Exelonstaff, during visual inspections of the couplings and conduits in the AIT, did not identify that flood seals and material had not been installed, as designed.