Boiling water
Gas cooled
Pressurised water
All of the above
B. Gas cooled
MeV
Curie
Farads
MW
U₂₃₅
U₂₃₈
Pu₂₃₃
Pu₂₃₉
The most fissionable material
The basic fuel for nuclear paints
Basic raw material for nuclear plants
The material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material
Demineralised water
Carbon dioxide
Heavy water
No moderator is used
Atomic power
Energy
Voltage
Radio activity
20
200
2000
20,000
Regenerative reactor
Fast breeder reactor
Breeder reactor
Boiling water reactor
Graphite
Heavy water
Concrete
Graphite and concrete
Is lighter
Is inert
Has high specific heat
Is a good conductor
1 tonne of high grade coal
4.5 tonnes of high grade coal
10 tonnes of high grade coal
100 tonnes of high grade coal
Increased production of neutrons
Complete absorption of neutrons
Controlled production of neutrons
Decreased leakage of neutrons
It produces more fuel than it consumes.
It requires highly enriched fuel.
It requires liquid sodium metal as moderator.
All of the above
Kinetic energy of neutrons
Kinetic energy of fission products
Instantaneous release of gamma rays
Gradual radioactive decay of fission products
Used fuel should be reprocessed
Moderator should be used
Coolant should be employed
Control rods should be used
U₂₃₃ and Pu₂₂₉
U₂₃₁ and Pu₂₃₃
U₂₃₅ and Pu₂₃₅
U₂₃₈ and Pu₂₃₉
Control temperature
Control radioactive pollution
Control absorption of neutron
Control fuel consumption
In a heterogeneous or solid fuel reactor, the fuel is mixed in a regular pattern within moderator.
Slow or thermal neutrons have energy of the order or 0.025 eV
Fast neutrons have energies above 1000 eV
Fast reactor uses moderator
As basic raw material
By neutron irradiation of Uz
By neutron irradiation of thorium
Artificially
Absorbs neutrons
Does not absorb neutrons
Accelerates neutrons
None of these
Reduce temperature
Extract heat from nuclear reaction
Control the reaction
Cause collision with the fast moving neutrons to reduce their speed
Chain reaction can be initiated
It becomes uncontrollable
It explodes
It produces no power
Artificially
By fission of Th₂₃₂
When U₂₃₈ is irradiated by neutrons
As basic raw material
Fast
Slow
In bulk
Static
Infinite
Zero
Exactly balanced by the loss of neutrons through leakage
Initiated
5 MeV
10 MeV
199 MeV
168 MeV
Acts as good moderator
Produces maximum steam
Transfers heat from core at a fast rate
Breeds neutrons
The original elements change into completely different elements
The electrons of the element change
The molecules rearrange themselves to form other molecules
None of the above
1 neutron
3 neutrons
1, 2 neutrons
2 neutrons
Heavy water
Graphite
Carbon dioxide
No moderator is needed
Same
More
Less
May be less or mote depending on size