Consider a homogeneous bare sourcefree uraniumfueled critica

Consider a homogeneous, bare, source-free, uranium-fueled, critical sphere reactor sitting on a table in a laboratory and operating at power Po. Indicate if the power increases, decreases, or remains unchanged as a result of each of the separate changes to the reactor. The reactor is deformed into the shape of a football (ellipsoid). A person stands next to the reactor. The temperature of the reactor is raised. The enrichment of the uranium is increased.

Solution

a)The power remain unchanged,as the power generation does not depend on shape of reactor.

b)The power unchanged, but there may effect of radio emmision on human body.

c)The temperature of reactor is raised it increases the power of reactor.But when fuel temperature increase, reactivity decreases and it causes power reduction from high to low.

d)The enrichment of uranium is incresed that unchange the power.As enrichment is process of increasing or decreasing percentage of U-235 through the process of isotope seperation.It is done for commercial nulear power plant.The production of energy in nuclear reactor is from fission or splitting of U-235 atom, a process which releases energy in the form of heat.U-235 is main fissile isotope of uranium.