As the world is growing at a very rapid pace, so is the technology. Nuclear science and engineering refers to one such technology, which studies the characteristics and properties of the atomic nuclei. It has applications in the fields like geology, nuclear medicine, ion implantation, magnetic resonance imaging, etc. The topics covered under this subject are nuclear fusion, nuclear decay, nuclear fission, etc. This book is a compilation of chapters that discuss the most vital concepts in the field of nuclear engineering. It studies, analyses and upholds the pillars of this field and its utmost significance in modern times. The various sub-fields of nuclear science along with technological progress that have future implications are glanced at in this textbook. It aims to serve as a resource guide for students and experts alike and contribute to the growth of the discipline.