This book understands popular myths and misconceptions about the danger of radiation and puts radiation exposures in perspective by how much radiation receives from nature without harm, it also discusses radiation effects on Human Health and the risk from various sources such as atomic and Nuclear reactors. Nuclear radiation refers to particles and photons emitted during chain reactions during Nuclear fission or fusion. U-235 the nuclear radiation that released contains Neutrons and gamma-ray Photons. There are several types of particles of wave that may shootout of radioactive materials in the nucleus, alpha particles, Beta Particles, Gamma Particles, and Neutrons are the most common forms of dangerous radiation. In this radiation in atmosphere, they could cloud of intense radioactivity immediate radiation after the explosion.