The main interest of shielding in nuclear reactor is protection against

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

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

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

Insurance refers to protection against an event that _________ happen whereas Assurance refers to protection against an event that _________ happen.

A

May, may not

B

Might, will

C

Must, need not

D

Will, will not

Biological shield in a nuclear reactor is generally provided to protect against the

A

α-rays

B

β-rays

C

Gamma rays & neutrons

D

Electrons

The main purpose of control rod in a nuclear reactor is to control the

A

chain reaction & hence the power output by regulating the number of secondary neutrons for fission

B

emission of hazardous radiation

C

conversion of fissile material into fertile material

D

velocity of the secondary neutrons

(i)Participation involves more than the formal sharing of decisions. (ii)through anticipation , individuals . or organizations consider trends and make plans , shielding institutions from trauma of learning by shock. (iii) Innovative learning involves both anticipation and participation . (iv) It is an attitude characterized by cooperation. dialogue and empathy.

A

(ii) + (iii) + (i) + (iv)

B

(i) + (ii) + (iv) + (iii)

C

(iv) + (i) + (iii) + (ii)

D

(iii) + (ii) + (i) + (iv)

The main interest of shielding in nuclear reactor is protection against

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