A couple of incidents reported to the NRC this morning by the Ft. Calhoun nuclear station in Nebraska:
1. Yesterday afternoon, the site’s waste disposal vendor found a two-ounce liquor bottle in a portable toilet inside the protected area.
2. Operators conducting an investigation of potential flood barrier problems found two four-inch conduits unsealed. According to the Event Report: “These conduits penetrate the south wall of the auxiliary building near the transformers into room 19. Flooding through the penetrations could have impacted the ability of the station’s auxiliary feedwater (AFW) pumps to perform their design accident mitigation functions.”
It should be noted that flooding of backup electrical power systems was a probable precipitating factor in the Fukushima Daiichi crisis.