Three Design Basis Accidents’ Analysis on the HTR-10GT

Table 7

Accident sequence of an initial core induced by earthquake.

Events	HTR-10GT	HTR-10
Densification of pebble bed and positive reactivity is induced	0.0 s	0.0 s
Reactor cycle ⩽ 20 s	0.54 s	0.54 s
Neutron flux of power level ⩾1.23	2.04 s	2.54 s
Control rods begin to drop	3.04 s	3.54 s
Time at which reactor power reaches a peak	3.04 s (14.0 MW)	4.04 s (15.2 MW)
Time at which fuel temperature reaches a peak	3.34 s (1067°C)	5.68 s (1038°C)
Time at which total positive reactivity reaches a peak (dk/k)	150.0 s (1.24%)	150.0 s (1.24%)