Table 1

Isotope inventories (in kilograms, unless otherwise stated).

Isotope Half life (Short) 233U − started 1y enrU+TRU − started 1y Fuel salt Equ. 200y Fertile salt
232U 69.8 y 3.5 142 g 13 34 g
233U   4976 514 4658 58.5
234U   143.9 12.8 1769 0
235U   4.9 2506 510 0
236U   0 149.5 562 0
237U   0     0
238U   0 16300 1 0
232U/U   700 ppm 50 ppm 1700 ppm 600 ppm
233U/U   97% 2.7% 62% 99%
238Pu   0 239 161 0
239Pu   0 3265 66 0
240Pu   0 1617 57 0
241Pu   0 641 48 0
242Pu   0 491 10 0
239Pu/Pu     52% 19%  
231Pa   300 g 900 g 10 630 g
232Pa 1.3 d 3.9 g 0 15 g 15.4 g
233Pa 27 d 124 45.6 108 13
234Pa 6.8 h 20 g 6.5 g 15.7 g 1 g
236Np   0 7 g 9.4 g 0
237Np   0 377.8 145 0
238Np 2.1 d 0 507 g 200 g 0
239Np 2.4 d 0 5.4 0 0

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