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

Table 6

Accident sequence of an equilibrium core induced by a control rod withdrawal by mistake.

Events	HTR-10GT	HTR-10
A control rod begins to withdraw out of the reflectors at a speed of 1 cm/s	0.0 s	0.0 s
Neutron flux of power level ⩾1.23	10.5 s	10.5 s
Core power reaches a peak	39.4 s (31.1 MW)	37.9 s (30.3 MW)
Hot helium temperature exceeds its setting point	54.9 s (800°C)	54.9 s (750°C)
Time at which control rods begin to drop	62.9 s	62.9 s
Fuel temperature reaches a peak	55.7 s (1066°C)	64.0 s (1041°C)
Time at which the accident rod is withdrawn out of the reflectors	155.0 s	155.0 s