HSBWR reactor system description and development status

1 short fiiel assemblies of 3 7m (heated length of 3 1 m) to avoid seismic resonance between the core and reactor building constructed on soft to firm ground, which make it possible to construct the standard plant underground with a high defence ability against terrorism, 

2 low volumetric power density of34 2 kW/1, and a long continuous operation period of 23 months, 

3 simple internals without forced recirculation systems (i e natural circulation) and steam 

4 no core uncovery in any loss-of-coolant accident (LOG A) with coolant left in the reactor pressure vessel (RPV) and coolant injected by the actuation of the steam driven reactor core isolation cooling (RCIC) systems, automatic depressurization system (ADS) and accumulators at a relatively low pressure of 0 5 1 0 MPa, 

5 decay heat absorption in the suppression pool for one day after the accident initiation and natural heat removal from the primary containment vessel (PCV) by heat conduction through the steel-fabricated PCV to the outer pool for three days, which gives operators enough time recovery actions, 

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HSBWR REACTOR SYSTEM DESCRIPTION AND DEVELOPMENT STATUS 7.3.1. Basic objectives and features... 

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