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

Table 5

Accident sequence of an initial 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	8.85 s	11.3 s
Core power reaches a peak	37.8 s (24.3 MW)	36.4 s (23.5 MW)
Hot helium temperature exceeds its setting point	80.1 s (800°C)	84.9 s (750°C)
Time at which control rods begin to drop	88.1 s	92.9 s
Fuel temperature reaches a peak	83.5 s (1201°C)	93.3 s (1170°C)
Time at which the accident rod is withdrawn out of the reflectors	155.0 s	155.0 s