EPRI-NP-616 TABLE 12 235U DECAY HEAT AND UNCERTAINTIES FOR 4-HOUR IRRADIATION RUN No. 4 FISSION RATE= 1.107 x 10^12 fissions/sec +/- 1.75% COOLING TIME DECAY HEAT POWER SIGMA (sec) (WATTS) (MEV/S)/ (FISS/S) (%) 11 1.662 9.372 22.7 20 1.523 8.586 17.5 40 1.283 7.237 11.1 50 1.192 6.722 7.3 70 1.051 5.925 6.4 100 0.9098 5.130 5.7 200 0.7053 3.977 4.0 400 0.5508 3.106 3.4 600 0.4428 2.497 3.5 720 0.4358 2.456 3.4 1020 0.3730 2.103 3.4 1980 0.2807 1.582 3.4 3000 0.2165 1.220 3.4 4980 0.1603 0.9037 3.4 7020 0.1080 0.6090 3.4 10020 0.07937 0.4474 3.4 19980 0.04706 0.2653 3.4 30000 0.0241 0.1358 9.6 49980 0.01737 0.09789 9.6 70020 0.01448 0.082 21.0