The electric power generated by a single average size nuclear reactor block is typically between 400 and 800 MW. The fission of one 235U nucleus generates 185.0 MeV energy on average. Consider a 800.0 MW reactor for a one year period. The reactor is loaded with Uranium fuel containing 4.00 percent of 235U? Assume that the overall thermodynamic efficiency of converting heat to electric energy at this power plant is 40.0 percent. What is the total amount of electric energy generated by the reactor block in one year? Submit Answer Tries 0/12 What is the total amount of heat produced by the reactor block in one year? Submit Answer Tries 0/12 How many Uranium fissions produced this amount of heat? Submit Answer Tries 0/12 At least how much Uranium fuel needs to be loaded into the reactor for a one year long run?

In class I derived the ordinary nuclear density to be about 0.138 u/fm3. A neutron star is a collapsed star that contains neutrons in a highly compactified state, so its average density is higher. Assume a neutron star is spherical and has an average density which is about twice the ordinary nuclear density. If it is 50% heavier than the Sun, what would be its radius? (Given: mass of sun = 2*1030 kg, 1 u = 1.66*10-27 kg.) A) 14.6 km                      B) 11.6 km                      C) 10.1 km                      D) none of these.

The cross section for a 2.0-MeV neutron (a typical energy for a neutron released in fi ssion) being absorbed by a 238U nucleus and producing fi ssion is 0.68 barn. For a pure 238U sample of thickness 3.2 cm, what is the probability of a 2.0-MeV neutron producing fi ssion? (p = 19 g/cm3 for uranium)

On absorption of a single neutron, plutonium Pu-239 can undergo fission into xenon Xe-134 plus zirconium Zr-103 plus three neutrons. The masses of these nuclei are, mpu-239 = 239.052 amu, mxe-134 = 133.905 amu, and mzr-103 = 102.927 amu. Calculate the energy given off in this nuclear reaction.

According to one estimate, there are 4.4 × 106 metric tons of world uranium reserves extractable at $130/kg or less. About 0.7% of naturally occurring uranium is the fissionable isotope235 U. (a) Calculate the mass of 235 U in this reserve in grams. (b) Find the number of moles of 235 U and convert to a number of atoms. (c) Assuming 208 MeV is obtained from each reaction and all this energy is captured, calculate the total energy that can be extracted from the reserve in joules. (d) Assuming world power consumption to be constant at 1.5 × 1013 J/s, how many years could the uranium reserves provide for all the world’s energy needs using conventional reactors that don’t generate nuclear fuel? (e) What conclusions can be drawn?

The electrical power output of a large nuclear reactor facility is 935 MW. It has a 39.0% efficiency in converting nuclear power to electrical. (a) What is the thermal nuclear power output in megawatts? (b) How many 235U nuclei fission each second, assuming the average fission produces 200 MeV? (c) What mass (in kg) of 235U is fissioned in one year of full-power operation?