1. The problem statement, all variables and given/known data A typical nuclear fission power plant produces about 3.36 GW of electrical power. Assume that the plant has an overall efficiency of 44.6% and that each fission event produces 250 MeV of thermal energy. Calculate the mass of 235U consumed each day. Answer in units of kg/d. 2. Relevant equations 3. The attempt at a solution Okay, so first I converted the 3.36 GW in 3.36E^9 W and divded that by .446 To get the Etotal. Multiply that times 1.6E^-13 to get MeV of 1.205E^-3. Divide the MeV/# of reactions by 250 MeV to get 4.821E^-6 reactions per second. Multiplied 4.821E^-6 * the mass of U235 which is 235.043925 and 1.66E^-27 to get 1.881228E^-30 kg consumed every second. 1.881228E^-30 (60)(60)(24) should give kg/ d, but for some reason It's not coming out as a correct answer. I get 1.62538E^-25 kg/day Can anyone find a mistake in my work?