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Fallout, atmospheric, from nuclear ecosystems

Technetium has been transferred to terrestrial and aquatic ecosystems due to the fallout from atmospheric nuclear weapons tests. It is assumed that 1 Mt fission energy corresponds to 1.45 x 10 fissions and that Cs is produced with a representative fission yield of 5.57%. Assuming that the global stratospheric injection of nuclear debris was 168.5 Mt and a fission yield of Tc of 6%, similar to that of Cs, the global activity of Tc released into the stratosphere is 160 TBq. When local fallout is included, the total release of Tc into the environment from nuclear weapons tests between 1945 and 1963 should be within 180-200 TBq. Any releases from underground nuclear weapon tests are assumed to have a local impact only. [Pg.4136]

Deposition of Tc in terrestrial ecosystems is globally attributed to atmospheric fallout, while releases from installations associated with the nuclear fuel cycle may have a local or regional impact. [Pg.4137]


See other pages where Fallout, atmospheric, from nuclear ecosystems is mentioned: [Pg.1712]    [Pg.1758]    [Pg.715]    [Pg.146]    [Pg.203]    [Pg.1658]    [Pg.1704]    [Pg.688]   


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Nuclear fallout

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