Pressurised water reactor is designed________________? A. for boiling pi water in the core B. to use liquid sodium metal as coolant C. to use intermediate coolantD. to prevent the water coolant from boiling in the core E. to eliminate the…
A fast breeder reactor uses_______________? A. 90% U-235 B. U-238 C. U-235 D. Pu-239 E. U-239
Effective moderators are those materials which contain____________________? A. light weight atoms B. heavy weight atoms C. critical atoms D. zero weight atoms E. there is no such criterion
The coolant used in boiling water reactor is________________? A. Co2 B. pressurised waterC. mixture of water and steam D. liquid metal E. mercury
The most practical fuel for a thermo-nuclear reactor, both from econocical and nuclear consideration is____________________? A. plutonium B. uraniumC. deuterium D. thorium E. lithium
The presence of reflector in nuclear power plants results in___________________? A. increased production of neutrons B. complete absorption of neutrons C. controlled production of neutronsD. decreased leakage of neutrons E. decrease of speed of neutrons
The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is__________________? A. higher cost of nuclear fuel B. high initial cost C. high heat rejection in condenserD. lower temperature and pressure condi-tions E. nuclear hazard risk
The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be________________? A. moreB. less C. same D. zero E. negative, i.e. fuel would be generated
A fission chain reaction in uranium can be developed by________________? A. slowing down fast neutrons so that Uz fission continues by slow motion neutrons B. accelerating fast neutrons C. absorbing all neutrons D. using moderator E. enriching U235
In order to have constant clain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be________________? A.…