EPRI-NP-616 TABLE 10 235U DECAY HEAT AND UNCERTAINTIES FOR 1-HOUR IRRADIATION RUN No. 12 FISSION RATE= 0.948 x 10^12 fissions/sec +/- 1.94% COOLING TIME DECAY HEAT POWER SIGMA (sec) (WATTS) (MEV/S)/ (FISS/S) (%) 11 1.072 7.069 22.7 20 1.006 6.633 17.5 40 0.8922 5.883 11.1 50 0.8435 5.562 7.3 70 0.7594 5.008 6.4 100 0.6606 4.356 5.7 200 0.4735 3.122 4.0 400 0.3384 2.231 3.4 600 0.2735 1.803 3.5 720 0.2618 1.724 3.4 1020 0.2077 1.368 3.4 1980 0.1325 0.8725 3.4 3000 0.09534 0.6277 3.4 4980 0.05926 0.3902 3.4 7020 0.04304 0.2834 3.4 10020 0.03427 0.2256 3.4