4.82. Energy management is a term used to describe the management of those design features of the containment that affect the energy balance within the containment and thereby play a part in maintaining pressure and temperature within acceptable limits. The elements for energy management used in water cooled reactors of extant and new designs are as follows:

(a) Inherent energy management features (e. g. the free volume of the containment and structural heat sinks),

(b) Spray systems,

(c) Air cooler systems,

(d) Suppression pool systems,

(e) Ice condenser systems,

(f) Vacuum pressure reduction systems,

(g) External recirculation cooling systems,

(h) Passive containment cooling systems.

4.83. Active components of the systems for energy management that are normally in the standby mode during normal operation should be testable.