Protons in the nucleus
Electrons in the nucleus
Neutrons in the nucleus
Electrons in the atom
A. Protons in the nucleus
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
Centrifugal
Axial
Reciprocation
Electromagnetic
Steam power plant
Gas turbine power plant
Hydro electric power plant
Nuclear power plant
Graphite
Heavy water
Concrete
Graphite and concrete
Increased production of neutrons
Complete absorption of neutrons
Controlled production of neutrons
Decreased leakage of neutrons
Unity
More than unity
Less than unity
Zero
It produces more fuel than it consumes.
It requires highly enriched fuel.
It requires liquid sodium metal as moderator.
All of the above
90% U₂₃₅
U₂₃₈
U₂₃₅
Pu₂₃₉
Maximum in centre and zero at side
Maximum at side and zero in canter
Uniform throughout
Zero throughout
X-rays
Infrared rays
Neutrons and gamma rays
Electrons
Same
More
Less
There is no such criterion
Any type of moderator can be used
Graphite is used as the moderator
Heavy water is used as the moderator
Moderator is dispensed with.
As basic raw material
By neutron irradiation of Uz
By neutron irradiation of thorium
Artificially
20
200
2000
20,000
As basic raw material
By neutron irradiation of Uz
By neutron irradiation of thorium
Artificially
1 neutron
3 neutrons
1, 2 neutrons
2 neutrons
Natural uranium
Enriched uranium
Pure uranium
Any type of uranium
Lead or concrete
Lead and tin
Graphite or cadmium
Thick galvanised sheets
Operate at extremely high power densities.
Are liquid metal cooled
Produce more fuel than they consume
Use water as coolant
Fast moving
Slow moving
Critical neutrons
Neutrons at rest
Boiler
Direct cycle of coolant system
Double circuit system of coolant cycle
Multi passes system
Electrons
Protons
Neutrons
Atom
Neutron
Proton
Atom
Electron
No new neutron
At least one new neutron
One new neutron
More than one new neutron
Graphite, CO2
Graphite, air
Heavy water, CO2
Lead, H2
Return the neutrons back into the core
Shield the radioactivity completely
Check pollution
Conserve energy
Fast
Slow
In bulk
Static
Higher cost of nuclear fuel
High initial cost
High heat rejection in condenser
Lower temperature and pressure conditions
High energy (fast) neutrons alone
Low energy (slow) neutrons alone
Either fast or slow neutrons
Medium energy neutrons
Boiler
Direct cycle of coolant system
Double circuit system of coolant cycle
Multi passes system