Nuclear power Essay Example | Topics and Well Written Essays - 500 words

Nuclear power - Essay Example Thermal reactors are common in many nuclear plants in the world since they mainly use thermal fission. Thermal neutrons move within thermal equilibrium at a temperature of about 550F, corresponding to a velocity of 3700 meters per second (Virtual Nuclear Tourist 1). On striking a uranium- 235 nucleus with the fuel, the nucleus sometimes split or fission into two unequally sized nuclei known as fission fragments. The fission products comprise large positively charged particles of elements such as Iodine or Strontium. The fission products slow down immediately and producing heat in the fuel. Moreover, 2 and 3 neutrons are produced in the process. The moderator decelerates the neutrons to the thermal energy. Neutrons do not travel very far within the reactor. They are generated from fission in the fuel, jump around in the moderator, then lose a large amount of their energies and later causes fission (Virtual Nuclear Tourist 1). The aim of nuclear fission is to generate heat. Thus, the coolant removes the heat and maintains the temperature of the fuel within tolerable limits (Virtual Nuclear Tourist 1). It also cools the moderator, which can also be used to cool the fuel. In some cases, it also cools the fuel by moving round the rods holding the fuel. The fuel within the reactor exists in the form of pellets of made of uranium dioxide or metal dioxide. There exists two or more isotopes of uranium and includes U- 235 and U 238 (Virtual Nuclear Tourist 1). U -238 is common in nature and has 146 neutrons and 92 protons. The remaining portion comprise of U – 235 and U 234. In commercial nuclear reactors, the fuel has a higher concentration of U- 235 compared to the level found in nature. It will undergo thermal and fast fission when struck by neutrons. Consequently, U – 238 will also undergo fission when struck by quick moving neutrons of specific energies and can in some case absorb

Health Administarion Essay Example | Topics and Well Written Essays - 250 words - 3

Health Administarion - Essay Example The lowest level of the hierarchy, physiological needs, should be the first to be met by an individual. An organization should ensure that employees have access to adequate shelter, food, and clothing. When the physiological needs have been adequately satisfied, safety of individuals will be the next on the priorities. In the case where an individual is residing within the organization’s premises, the management should ensure that they are secure, both financial and physically. Financial security will imply management undertaking strategic measures to ensure they invest in activities that will secure their future financial obligations (Miller and McBrewster 86). The need for belonging is an interpersonal need. Individuals need to be loved and have a cordial relationship with their families and friends. The organization should provide their employees time to intermingle with their family members. Human beings need to feel a sense of acceptance and belonging in the society. The fourth need is self esteem. Individuals need to have s stable self-esteem and self-respect in the society. As such, the management should issue measures that will necessitate competency, mastery, freedom and independence, and self-confidence. Instigating these measures to its employees, the management will ensure that self-esteem needs are realized. Finally, the topmost level in the hierarchy is self-actualization. Individuals strive to achieve these needs. This level will be achieved when the other needs such as physiological, safety, belonging, and self esteem are