• Uploaded by Renseor on Jan 25, 2013
  • Views: 29

http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2013/20... CONTAINMENT PRESSURE POSITIVE FOR 12 SECONDS"On 01/22/2013 at 00:30 Reactor building HVAC tripped due to low outside air temperature and Standby Gas Treatment system was manually started and maintained Reactor Building differential pressure negative. At 01:13 secondary containment pressure went positive during restart of the Center Reactor Building HVAC Train. This is a loss of secondary containment function. In a 12 second time span secondary containment pressure went above 0 inches WC Water Column to 0.17 inches WC and then decreased to 0 inches WC remaining stable during the Reactor Building HVAC restart. The Center Reactor Building HVAC Exhaust Fan Discharge Damper opened after the Supply Fan discharge damper; this condition would produce the indications noted."The System was returned to normal with two Reactor Building HVAC trains running and the Standby Gas Treatment System shutdown and in standby. Reactor building pressure is stable with differential pressure negative - 0.30 inches WC."The loss of Secondary Containment function is reportable under 10 CFR 50.72 (b)(3)(v)(C) as an event or condition that could have prevented the fulfillment of a safety function needed to control the release of radioactive material."The licensee notified the NRC Resident Inspector.(NOTE: some symbols on the report are "illegal characters on YT" so Refer to the original report in link for exact report symbols.) -Thanks to MsMilkytheclown for the clarification! (https://www.youtube.com/user/MsMilkytheclown1)Nuclear Regulatory Commission daily reports (what's happening at nuclear plants near you):http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2013/Union of Concerned Scientists (watchdog over NRC):http://www.ucsusa.org/nuclear_power/NRC ADAMS Public Documentshttp://www.nrc.gov/reading-rm/adams.html U.S. Nuclear Regulatory Commission24-Hour Center for Emergencies number 301-816-5100Safety or security concern line 1-800-695-7403General help or information line 1-800-397-4209Switch Board: Toll free: 1-800-368-5642 Local: 301-415-7000http://www.nrc.gov/about-nrc/contactus.html EPA National Response Center 1-800-424-8802 http://www.epa.gov/epahome/violations.htm How close is your home to a nuclear power plant?http://money.cnn.com/news/specials/nuclear_power_plants_locations/

Show Description Hide Description