Study of Delayed Neutrons Emission Rate in Slightly Super-Prompt-Critical System

Emission rates of delayed neutrons and burst initiation time for GodivaⅠ burst assembly in the presence of weak neutron source, whose reactivity was 5 ￠ above prompt criticality, were calculated using analog Monte-Carlo method. The result of initiation time is consistent with experiment. Emission rate of delayed neutron attained from calculation can well explain the probability distribution of initiation time.