Question

I am having trouble being able to solve this problem. There is a part D) that I could not fit in the picture. It is stated below.

7. 15+5+5+5-20 ptsl The fission process generates unstable fission products. Consider the following radioactive decay reactions: Nd 149 149 Sm (stable ma 62 149 1.72 hr 53.1 hr a) What type of radioactive decay is shown above? Why would you expect this type of decay for fission products? Mr. a S b) Noting that Nd and Pm have negligible microscopic cross sections and that the half-live for Pm is 31 times larger than that of Nd, write down the ordinary differential equations for the concentrations of Pm and Sm in a reactor, assuming a constant flux. vou introduce new symbols define them. Nd as c) After a long time (equilibrium) what would be the concentrations of Pm and Sm? Provide the expressions and explain how you obtained them for full credit. 2, S nut

d) If the reactor shutdown for a long time, what would the new equilibruim values for the concentration of Sm and Pm be?

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Answer 1

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