= an = 
The energy released by fissioning 1000 grams of yo? dss 
1000 grams 23 
2S ae | [6.023 x 10° atons/eran atom) 
E x r08ex/tission|[4.t5 x loan shin = 22S ss 10 “ewh (approx. ) 
or 22, 800 megawatt hrs 
or 1000 megawatt days 
This energy of fission is released in several ways as shown in Table 2: 
TABLE 2 
Energy Distribution from Fissioning 1 Kg yu? 
Mwd 
Mev/fission % 1 kg Ue32 
KE of fission fragments 162 8.0 840 
Fission gamma 5 2.6 26 
KE of neutrons 5 2.6 26 
Neutron capture gamma ~~ 10 Bick bull 
Beta decay energy 5 2.6 26 
, Gamma decay energy 6 Bl 31 
0.0 1000 
193 100. 
Note: 1 kg U--? is contained in 139 kg of natural uranium. 
DECLASSIFIED 
