Question

Part A Even when shut down after a period of normal use, a large commercial nuclear reactor transfers thermal energy at the rate of 147 MW by the radioactive decay of fission products. This heat transfer causes a rapid increase in temperature if the cooling system fails (1 watt = 1 joule/second or 1 W = 1 J/s and 1 MW = 1 megawatt). Calculate the rate of temperature increase in degrees Celsius per second (°C/s) if the mass of the reactor core is 1.60x105 kg and it has an average specific heat of 0.3750 kJ/kgº.C. Figure caption: Radioactive spent-fuel pool at a nuclear power plant. Spent fuel stays hot for a long time. (credit: U.S. Department of Energy) 2.74 degC/s Submit Answer Incorrect. Tries 1/10 Previous Tries Part B How long would it take to obtain a temperature increase of 2000°C, which could cause some metals holding the radioactive materials to melt? (The initial rate of temperature increase would be greater than that calculated here because the heat transfer is concentrated in a smaller mass. Later, however, the temperature increase would slow down because the 5.08x105-kg steel containment vessel would also begin to heat up.) 12.1 min Submit Answer Incorrect. Tries 1/10 Previous Tries

Answer 1

Guven data, Mass ob reactor 60Xlkq Specibic heat 03750 K1gc ue know that mCOT me 4186 1.60 x10 g) (0.3750 rall 35117 OS DT CniNen that, Ternpevatue inoaase 2000% 20002 t 0 $8scls 3418 seconds t z56.96min