Molten sodium is used as a coolant in a fast breeder reactor, because of its

Molten sodium (as a coolant in fast breeder reactor)

A

can't attain high temperature at normal pressure

B

is not at all corrosive even at a higher temperature

C

is highly radioactive at elevated temperature & can cause explosion when it comes in contact with air or water

D

none of these

The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is

A

Same

B

Lower

C

Higher

D

Unity

Use of molten metal as a coolant in fast breeder reactor helps in

A

Rapid heat transfer from the core

B

Accelerating the reaction rate in the core

C

Breeding neutrons

D

Accelerating the neutrons

Secondary cooling circuit is a must in molten sodium cooled fast breeder reactor for

A

Achieving high degree of superheat in the steam

B

Faster heat removal rate from the core

C

Lowering the coolant circulation pressure

D

Avoiding the mixing of water with radioactive sodium, as it may cause explosion

Coolant used in a fast breeder reactor is

A

Molten sodium

B

Heavy water

C

Ordinary water

D

Helium

The type of pump used for the recirculation of molten sodium coolant in liquid metal cooled reactor is a/an __________ pump.

A

Electromagnetic

B

Reciprocating

C

Centrifugal

D

Volute

Liquid metal (e.g, . molten sodium) is preferred as a coolant in case of a/an __________ reactor.

A

Homogeneous

B

Graphite moderated

C

Fast breeder

D

Enriched uranium (3% U-235) fuelled

A thermal nuclear reactor compared to a fast breeder reactor

A

Uses slower neutrons for fission

B

Uses faster neutrons for fission

C

Gives higher power density

D

Requires less fuel to run at the same power level

Pump used for the transportation of molten sodium in a fast breader reactor is a/an __________ pump.

A

Reciprocating

B

Plunger

C

Electromagnetic

D

Gear

Breeder reactors employ liquid metal coolant because it

A

Acts as good moderator

B

Produces maximum steam

C

Transfers heat from core at a fast rate

D

Breeds neutrons

Molten sodium is used as a coolant in a fast breeder reactor, because of its

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