Correct option is A
The correct sequence of events in a nuclear power plant is:
C. Bombardment by neutron: A neutron bombards a radioactive nucleus (like Uranium-235).
E. Absorption of neutrons by radioactive nucleus: The nucleus absorbs the neutron and becomes unstable.
B. Moderation of neutrons: The emitted neutrons are slowed down (moderated) by a moderator (like heavy water or graphite) to sustain the chain reaction effectively.
A. Controlled chain reaction: The moderated neutrons cause further fission of nuclei in a controlled manner to avoid explosive energy release.
D. Heat Release: The fission process releases a large amount of heat, which is used to produce steam for electricity generation.
Information Booster:
Nuclear fission is the splitting of a heavy nucleus into lighter nuclei releasing energy and neutrons.
Moderators are essential to slow down fast neutrons to sustain the chain reaction.
Control rods absorb excess neutrons to regulate the chain reaction rate.
Heat generated from fission is converted to electrical energy in turbines.
The controlled chain reaction is crucial for safe and steady power generation.
The nuclear reactor core houses fuel rods, moderators, and control rods.
Proper moderation and control ensure the reactor does not become supercritical or shut down unexpectedly.
Additional Information:
(a) C, E, B, A, D: Correct answer; accurately describes the process flow in nuclear power plants.
(b) A, B, C, D, E: Incorrect sequence; chain reaction starts after neutron bombardment and absorption.
(c) B, C, D, A, E: Incorrect; moderation comes after neutron absorption, not before bombardment.
(d) D, E, C, B, A: Incorrect; heat release is the last step, not the first.
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10 Questions
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