1. The problem statement, all variables and given/known data What initial mass of 23592U is required to operate a 350 MW reactor for 3 yrs? Assume 46% efficiency. 2. Relevant equations I used Mass* C* efficiency as a decimal= power (e^-6) * time (in seconds) and got 800 as the mass, however, this was incorrect 3. The attempt at a solution (M)*(3e8)^2* .46= 350e6* 9.14 i think it was (whatever 3 years in seconds is) and i was getting 800 as the mass, or 799Kg specifically however, this is incorrect . Where am i going wrong?