Same atomic number and different masses
Same chemical properties but different atomic numbers
Different masses and different atomic numbers
Different chemical properties and same atomic numbers
B. Same chemical properties but different atomic numbers
90% U₂₃₅
U₂₃₈
U₂₃₅
Pu₂₃₉
Is lighter
Is inert
Has high specific heat
Is a good conductor
For boiling pi water in the core
To use liquid sodium metal as coolant
To use intermediate coolant
To prevent the water coolant from boiling in the core
Boiler
Direct cycle of coolant system
Double circuit system of coolant cycle
Multi passes system
Acts as good moderator
Produces maximum steam
Transfers heat from core at a fast rate
Breeds neutrons
As basic raw material
By neutron irradiation of Uz
By neutron irradiation of thorium
Artificially
Higher cost of nuclear fuel
High initial cost
High heat rejection in condenser
Lower temperature and pressure conditions
Does not absorb neutrons
Absorbs neutrons
Accelerates neutrons
Eats up neutrons
To produce heat for thermoelectric power
To produce fissionable material
To propel ships, submarines, aircrafts
All of these
Fast
Slow
In bulk
Static
Control temperature
Control radioactive pollution
Control absorption of neutron
Control fuel consumption
Nucleus
Electron
Proton
Meson
U₂₃₃
U
U₂₃₈
Pu
Greater than 1.0
Less than 1.0
Equal to zero
Equal to 1.0
1 MeV
2.4 MeV
4.3 MeV
7.8 MeV
Same
More
Less
May be less or mote depending on size
Protons in the nucleus
Electrons in the nucleus
Neutrons in the nucleus
Electrons in the atom
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
Any form of uranium
Natural uranium
Enriched uranium
Plutonium
Coolant itself
Ferrite rod
Graphite rod
Liquid sodium metal
U₂₃₃ and Pu₂₃₉
U
U₂₃₈ and Pu₂₃₉
U₂₃₈ and Th₂₃₉
Unity
More than unity
Less than unity
Zero
Artificially
As basic raw material
When thorium is irradiated by neutrons
By fission of U₂₃₈
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
Artificially
When U238 is irradiated by neutrons
By fission of Th232
As basic raw material
Slow down the speed of fast moving neutrons
Control the reaction
Reduce the temperature
Extracts heat from nuclear reaction
Mass number
Atomic number
Chemical properties
Position in periodic table
High neutron absorption cross-section
Low moderating efficiency
High neutron scatter cross-section
Low neutron absorption cross-section
Pressurised water
Boiling water
Gas cooled
Liquid metal cooled
Increases
Decreases
Have no effect on
None of these