Plates
Pallets
Pins
Any one of the above
Coolant itself
Ferrite rod
Graphite rod
Liquid sodium metal
Percentage of U₂₃₅ has been artificially increased
Percentage of U has been artificially increased
Percentage of U₂₃₄ has been artificially increased
Extra energy is pumped from outside
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
2.46
24.6
246
2460
Protons and neutrons in an atom
Protons and electrons in an atom
Neutrons and electrons in an atom
Protons and neutrons in a nucleus
U₂₃₃ and Pu₂₃₉
U
U₂₃₈ and Pu₂₃₉
U₂₃₈ and Th₂₃₉
Used fuel should be reprocessed
Moderator should be used
Coolant should be employed
Control rods should be used
Higher cost of nuclear fuel
High initial cost
High heat rejection in condenser
Lower temperature and pressure conditions
Lead or concrete
Lead and tin
Graphite or cadmium
Thick galvanised sheets
U₂₃₄ = 0.006%, U₂₃₅ = 0.712% and U₂₃₈ = 99.282%
U₂₃₄ = 0.712%, U₂₃₅ = 0.006% and U₂₃₈ = 99.282%
U₂₃₄ = 99.282%, U₂₃₅ = 0.006% and U₂₃₈ = 0.712%
U₂₃₄ = 0.006%, U₂₃₅ = 99.282% and U₂₃₈ = 0.712%
Centrifugal
Axial
Reciprocation
Electromagnetic
Increases
Decreases
Have no effect on
None of these
Belt conveyor
Bucket conveyor
Fork lift truck
Overhead crane
U₂₃₅
U₂₃₈
Pu₂₃₉
Pu₂₃₃
100
200
300
400
Does not absorb neutrons
Absorbs neutrons
Accelerates neutrons
Eats up neutrons
Neutron
Proton
Atom
Electron
1 MeV
2.4 MeV
4.3 MeV
7.8 MeV
CO2
Pressurised water
Mixture of water and steam
Liquid metal
It is generating power to rated capacity
It is capable of generating much more than rated capacity
There is danger of nuclear spread
Chain reaction that causes automatic splitting of the fuel nuclei has been established
Slow down the speed of fast moving neutrons
Control the reaction
Reduce the temperature
Extracts heat from nuclear reaction
To maintain constant pressure in primary circuit under varying load
To Supply high pressure steam
To increase pressure of water in primary circuit
To provide sub cooled water at high pressure
Enriched uranium
Plutonium
Thorium
U₂₃₅
Plutonium
Uranium
Deuterium
Thorium
Demineralised water
Carbon dioxide
Heavy water
No moderator is used
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
X-rays
Infrared rays
Neutrons and gamma rays
Electrons
Fast
Slow
In bulk
Static
Is lighter
Is inert
Has high specific heat
Is a good conductor