Fuel for a nuclear reactor (thermal) is

CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the

A

Specific fuel consumption is very low due to the use of heavy water

B

Fuel cost is much lower than that used in pressurised water or boiling water reactor

C

Heavy water is used both as coolant as well as moderator

D

Both B and C

If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.

A

Critical

B

Breeder

C

Fertile

D

Heterogenous

Thermal shield used in high powered nuclear reactor to protect the walls of the reactor from radiation damage is made of

A

Concrete

B

Steel

C

Zircalloy

D

Graphite

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

Zircalloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium

A

Tin, nickel, iron and chromium

B

And graphite

C

And copper

D

None of these

Spent fuel from the nuclear thermal reactor contains

A

Fission products

B

Plutonium

C

Unused fuel

D

All of the above

In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.

A

Semi-batch

B

Tubular

C

Batch

D

Back-mix

A nuclear reactor is said to be critical when the neutron population in the reactor core is

A

Rapidly increasing leading to the point of explosion

B

Decreasing from the specified value

C

Reduced to zero

D

Constant

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

A

Same

B

Lower

C

Higher

D

Unity

The energy produced by a thermal reactor of same size as a breeder reactor is

A

Almost same

B

Slightly more

C

Slightly less

D

Much less

Fuel for a nuclear reactor (thermal) is

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