Fermi Nuclear Plant, MI, LOSS OF SECONDARY CONTAINMENT FUNCTION 1/22/13
Channel: MsMilkytheclown1
Date: 24/01/2013

Thank you RumorECurioso
***Same Reactor design as Fukushima Daiichi***
Link to NRC Event Notification Report here:
http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2013/20130123en.html
SECONDARY 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.
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 Documents
http://www.nrc.gov/reading-rm/adams.html

U.S. Nuclear Regulatory Commission
24-Hour Center for Emergencies number 301-816-5100
Safety or security concern line 1-800-695-7403
General help or information line 1-800-397-4209
Switch Board: Toll free: 1-800-368-5642 | Local: 301-415-7000
http://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/