Nuclear Engineering Question:

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Thermal shield is used in high powered nuclear reactors to

A. protect the walls of the reactor from radiation damage.
B. absorb the fast neutrons.
C. slow down the secondary neutrons.
D. protect the fuel element from coming in contact with the coolant.

Nuclear Engineering Interview Question
Nuclear Engineering Interview Question

Answer:

Option A

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The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about __________ metres/second.

A. 1100
B. 2200
C. 3300
D. 4400		The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then

A. 3/4th of it will disintegrate in two months.
B. it will completely disintegrate in two months.
C. it will completely disintegrate in four months.
D. l/8th of it will remain intact at the end of four months.