Nuclear Reactors

In a pressurized water reactor( PWR) _____________

• Light or heavy water is used as both coolant and moderator.

• The coolant water boils in the reactor core.

• Water is used at high pressure

• Both (a) and (c).

The reason for providing the thermal shielding is to _________________

• Absorb the fast neutrons

• Protect the operating personnel from exposure to radiations

• Prevent the reactor wall from getting heated

• All of the above

Reflectors of a nuclear reactors are made of........

• Boron

• Cast iron

• Beryllium

• Steel

The nuclear energy is measured as........

• MeV

• MW

• Curie

• None of the above

The function of the moderator in a nuclear is to........

• Stop chain reaction

• Absorb neutrons

• Reduce the speed of neutrons

• Reduce temperature

Tags

NGSS.HS-PS1-8

In a nuclear reactor function of reflector is to......

• Reduce the speed of the neutrons

• Stop the chain reaction

• Reflect the escaping neutrons back into the core

• None of the above

Which is the most commonly used moderator?

• Graphite

• Sodium

• Deuterium

• Heavy water

U238 will undergo fission by

• Slow neutrons alone

• fast neutrons alone

• Either fast or slow neutrons

• medium energy neutrons

Tags

NGSS.HS-PS1-8

The risk of radioactive hazard is greatest in the turbine with following reactor

• pressurized water

• boiling water

• gas cooled

• liquid metal cooled

Tags

NGSS.HS-PS1-8

The function of control rods is nuclear plants is to

• control temperature

• control radioactive pollution

• control absorption of neutron

• control fuel consumption