Nuclear Energy (Fission and Nuclear Reactor) Class 12 Notes | EduRev

Physics Class 12

Class 12 : Nuclear Energy (Fission and Nuclear Reactor) Class 12 Notes | EduRev

The document Nuclear Energy (Fission and Nuclear Reactor) Class 12 Notes | EduRev is a part of the Class 12 Course Physics Class 12.
All you need of Class 12 at this link: Class 12

Nuclear Fission

The process of the splitting of a heavy nucleus into two or more lighter nuclei is called nuclear fission.

When a slow moving neutron strikes with a uranium nucleus (92U235), it splits into 56Ba141 and 36Kr92 along with three neutrons and a lot of energy.

Nuclear Energy (Fission and Nuclear Reactor) Class 12 Notes | EduRevNuclear Energy (Fission and Nuclear Reactor) Class 12 Notes | EduRev

Nuclear Chain Reaction

If the particle starting the nuclear fission reaction is produced as a product and further take part in the nuclear fission reaction, then a chain of fission reaction started, which is called nuclear chain reaction.

Nuclear chain reaction are of two types

(i) Controlled chain reaction

(ii) Uncontrolled chain reaction


Nuclear Reactor

The main parts of a nuclear reactor are following

Nuclear Energy (Fission and Nuclear Reactor) Class 12 Notes | EduRev

(i) Fuel Fissionable materials like 92U23592U23894U239 are used as fuel.

(ii) Moderator Heavy water, graphite and beryllium oxide are used to slower down fast moving neutrons.

(iii) Coolant The cold water, liquid oxygen, etc. are used to remove heat generated in the fission process.

(iv) Control rods Cadmium or boron rods are good absorber of neutrons and therefore used to control the fission reaction.

Atom bomb working is based on uncontrolled chain reaction.

Nuclear Fusion

The process of combining of two lighter nuclei to form one heavy nucleus, is called nuclear fusion.

Three deuteron nuclei (1H2) fuse, 21.6 MeV is energy released and nucleus of helium (2He4) is formed.

Nuclear Energy (Fission and Nuclear Reactor) Class 12 Notes | EduRevNuclear Energy (Fission and Nuclear Reactor) Class 12 Notes | EduRev

In this process, a large amount of energy is released.

Nuclear fusion takes place at very high temperature approximately about 107 K and at very high pressure 106 atmosphere.

Hydrogen bomb is based on nuclear fusion.

The source of Sun’s energy is the nuclear fusion taking place at sun.

Thermonuclear Energy

The energy released during nuclear fusion is know as thermonuclear energy. Protons are needed for fusion while neutrons are needed for fission process.

Offer running on EduRev: Apply code STAYHOME200 to get INR 200 off on our premium plan EduRev Infinity!

Dynamic Test

Content Category

Related Searches

Summary

,

past year papers

,

Nuclear Energy (Fission and Nuclear Reactor) Class 12 Notes | EduRev

,

Important questions

,

study material

,

shortcuts and tricks

,

pdf

,

Semester Notes

,

Nuclear Energy (Fission and Nuclear Reactor) Class 12 Notes | EduRev

,

Objective type Questions

,

Previous Year Questions with Solutions

,

mock tests for examination

,

Exam

,

Free

,

practice quizzes

,

ppt

,

video lectures

,

MCQs

,

Nuclear Energy (Fission and Nuclear Reactor) Class 12 Notes | EduRev

,

Extra Questions

,

Viva Questions

,

Sample Paper

;