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What is the function of moderator in a n...

What is the function of moderator in a nuclear reactor ?

Text Solution

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They are used to slow down the fast moving neutrons produced during the fission process. e.g. : Heavy water, Berilium.
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Knowledge Check

  • (A) : Heavy water is used as moderator in nuclear reactors. (R) : Heavy water undergoes exchange reaction in nuclear reactor.

    A
    Both A and R are false
    B
    Both A and R are true R is not correct explanation of A
    C
    Both A and R are true and R is correct explanation of A
    D
    A is true but R is false

  • Assertion (A) : Heavy water is used as moderator in nuclear reactors. Reason (R) : Heavy water undergoes exchange reaction.

    A
    Both A and R are true
    B
    Both A and R are false
    C
    Both A and R are true but R is not correct explanation of A
    D
    Both A and R are true and R is correct explanation of A

  • Which of the following is/are correct for a nuclear reactor ?

    A
    A typical fission is represented by` ""_(92)^(235 )U +""_(0)^(1)n to Kr` + Energy
    B
    Heavy water `(D_2O)` is used as moderator in perference to ordianary water `(H_2O)` becase hydrogen may capture neutrons , while D would not do that
    C
    Cadmium rods increase the reactor power when they go in and because when they go outwards
    D
    Slower neutrons are more effective in causing fission than faster neutrons in the case of `""^(235) U`

    • Similar Questions

    Explore conceptually related problems

    Heavy water is used as moderator in a nuclear reactor. The function of the moderator is

    Some statements about heavy water are given below. (i) Heavy water is used as a moderator in nuclear reactors (ii) Heavy water is more associated than ordinary water. (iii) Heavy water is more effective solvent than ordinary water Which of the above statements are correct ?

    A deuterium compound (A) which is used as a moderator in nuclear reactor reacts with Ca to form compound B. A reacts with SO_2 to give compound C. Upon electrolysis compound A gives deuterium molecule. Identify A, B and C.

    An isotope of hydrogen reacts with oxygen to give compound (A), which is used as a moderator in nuclear reactor. Like hydrogen, this isotope also undergoes addition reaction. It reacts with ethylene to give compound B, which is a saturated hydrocarbon. Identify the element A and B. A is radioactive.

    Consider the following statements. A, B and identify the correct choice in the given answers (A) Density of a nucleus is independent of its mass number (B) Beryllium is used as moderator in nuclear reactors

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