The external shield serves to protect the personnel from radiation. Supplementary Information Steel lining is used for internal shielding and high density concrete for external shielding. Go to top . B. Fusion reaction Understandings and Fundamental Concepts Fusion is the process of combining two light nuclei to form a heavier one. The energy released in a fusion reaction is much greater than in a fission reaction.
Solar energy is probably the result of the fusion of ordinary hydrogen atoms to form helium.
The nuclear reaction of a hydrogen bomb utilizes fission as a trigger for fusion. Go to top . Since each nucleus carries a positive charge, nuclei repel one another with increasing strength as they are moved closer together. Consequently, for the nuclei to interact, they must have enough kinetic energy to overcome the repulsion. The thermonuclear approach, through the use of very high temperatures, appears to be very promising for controlled fusion.