51. In a homogeneous nuclear reactor, the __________ are mixed together.
52. An electron has a mass that is approximately __________ that of the proton.
53. Nucleus of 92U235 contains __________ protons.
54. Thermal neutrons which are used to cause the fission of U-235 have energy __________ eV.
55. Primary purpose of a __________ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014 neutrons/cm2 second.
56. Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around __________ m/sec.
57. Atoms of U-238 and U-235 differ in structure by three
58. Percentage of U-238 in natural uranium is around
59. Candu reactor is a __________ nuclcear reactor.
60. A control rod
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