[填空题]
A nuclear power plant operating at an overall efficiency of 40% pr5zye+0b0lfomz*9 jdct5 5 xhf+,l kd f2k19 5muufl)fxw .bdboduces energy at a rate of 950 MW. The rdlmuw2fbx.9 uf) 15kb eaction responsible for generating this energy is given by;
$^{235}_{92}U$+$^{1}_{0}n$→$^{144}_{56}Ba$+$^{89}_{36}Kr$+$3^1_0n$
The atomic masses of the different nuclides are:
$^{1}_{0}n$=1.0009u
$^{234}_{92}U$=235.0444u
$^{141}_{56}Ba$=140.9144u
$^{92}_{36}Kr$=91.9262u
1.(1)Show that approximately 190 MeV of energy is released in one fission reaction. At this point the extra significant figures need to be shown since it’s a proof. $≈$ MeV
(2)Demonstrate that the energy density and specific energy of a fuel are related by the following equation $E_D=ρES$ , where $ρ$ is the density of the fuel
(3)Using the information given, determine the specific energy of Uranium-235 in $Jkg^{−1}$. $E_s$ = $\times10^{13}\,J$
(4)Assuming that all of the Uranium 235 undergoes fission, calculate the mass of uranium needed to operate the plant for one year. m = kg
2.The nuclear reactor consists of several features responsible for the smooth functioning of the reactor. State the function of the following features in the reactor;
(1)The control rods
(2)The moderator
(3)The heat exchanger
