Abstract

A reactor containment concept is proposed in which the reactor system is contained in a dry container which normally is maintained at subatmospheric pressure. Following a loss-of-coolant incident, the containment pressure is returned to subatmospheric by the use of redundant spray cooling systems. Subatmospheric containment is a departure from previously proposed containments, in that previous designs have remained above atmospheric pressure indefinitely following the hypothetical incident with continuous leakge resulting. Subatmospheric containment results in the absolute termination of leakage following the hypothetical incident, with subsequent minimization of all biological effects due to the incident. Charcoal and particulate filters, chemical sprays, or other fission product removal devices in the containment are not required.

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