The radioactive nuclides released into the atmosphere by the Chernobyl nuclear accident
in 1986 included both 131I (t 1/2= 8 days) and 137Cs (t 1/2= 30 years). Given that 5 times as
many 137 Cs as 131 I are present in the reactor in steady state, and that 131 I is produced in
roughly 1% of all fissions, calculate
(a) the ratio of activities ACs/AI immediately following the explosion.
(b) how many days before the activities are equal.
(c) Given that the Chernobyl reactor produced 1000MW of power, estimate AI 4 days
after the explosion.
it would take me considerable amount of effort to find what means 1% of all fissions produce I 131 .
The Attempt at a Solution
it is A level to find that λ= ln2/ (t1/2) and A= λΝ as is probably the whole exercise.
which gives Acs/AI easily since 5NI =Ncs is given,
b) N=No e^-λt should suffice
c) maybe among the other equations P=Po e^-λt has to be used once the power has been found 4 days after the accident , some other equation must be used to find AI ,note that AI initial is not given ,but only as a function of Acs.