A standby gas treatment (SBGT) system is part of the secondary containment system of a nuclear power plant. When called upon to operate, the SBGT system filters and pumps air from secondary containment to the environment and maintains a negative pressure within the secondary containment in order to limit the release of radioactive material.
Each SBGT train generally consists of a mist eliminator/roughing filter; an electric heater; a prefilter; two absolute (HEPA) filters; an activated charcoal filter; an exhaust fan; and associated valves, ductwork, dampers, instrumentation, and controls. The signals that trip the SBGT system are plant-specific; however, automatic trips are generally associated with the electric heaters and a high temperature condition in the charcoal filters.
Read more about this topic: Nuclear Reactor Safety Systems
Famous quotes containing the words gas and/or treatment:
“A new father quickly learns that his child invariably comes to the bathroom at precisely the times when hes in there, as if he needed company. The only way for this father to be certain of bathroom privacy is to shave at the gas station.”
—Bill Cosby (20th century)
“Our treatment of both older people and children reflects the value we place on independence and autonomy. We do our best to make our children independent from birth. We leave them all alone in rooms with the lights out and tell them, Go to sleep by yourselves. And the old people we respect most are the ones who will fight for their independence, who would sooner starve to death than ask for help.”
—Margaret Mead (19011978)