REACTOR LAB 1-100 questions and answers with solutions 2024/25

a - ANSWER QUESTION A-1 With the reactor on a constant period, which transient requires the LONGEST time to occur? A reactor power change of: a. 5% of rated power - going from 1% to 6% power of rated power b. 10% of rated power - going from 10% to 20% power of rated power c. 15% of rated power - going from 20% to 35% power of rated power d. 20% of rated power - going from 40% to 60% power of rated power a - ANSWER QUESTION A-2 The time required to increase power from 100 W to 250 kW on a 5 second period is about: a. 40 seconds b. 90 seconds c. 200 seconds d. 360 seconds d - ANSWER QUESTION A-3 Which ONE of the following statements is a characteristic of subcritical multiplication? a. The number of neutrons gained per generation doubles for each succeeding generation. b. A constant neutron population is achieved when the total number of neutrons produced in one generation is equal to the number of source neutrons in the next generation. c. For equal reactivity additions, it takes less time for the equilibrium subcritical neutron population level to be reached as Keff approaches one. 1. Doubling the indicated count rate will reduce the margin to criticality by approximately one half. c - ANSWER QUESTION A-4 During a brief time interval in a typical commercial nuclear reactor operating at the beginning of a fuel cycle, 1.0 x 10^5 delayed neutrons were emitted.