Analysis of information sources in references of the Wikipedia article "Переробка відпрацьованого ядерного палива" in Ukrainian language version.
.. в отличие от Франции, России и Германии, .. США .. предпочитали хоронить его неподалеку от своего игрового центра в Лас-Вегасе в штате Невада, где на сегодняшний день накопилось уже более 10 тысяч тонн облученного топлива
Current reprocessed plutonium (fuel burn-up 35-40 MWd/kg HM) has a fissile content of some 65%, the rest is mainly Pu-240.
.. в отличие от Франции, России и Германии, .. США .. предпочитали хоронить его неподалеку от своего игрового центра в Лас-Вегасе в штате Невада, где на сегодняшний день накопилось уже более 10 тысяч тонн облученного топлива
Current reprocessed plutonium (fuel burn-up 35-40 MWd/kg HM) has a fissile content of some 65%, the rest is mainly Pu-240.
Allowing the fuel to stay longer in the reactor increases the concentration of the higher isotopes of plutonium, in particular the Pu-240 isotope. For weapons use, Pu-240 is considered a serious contaminant,..., but any significant proportions of Pu-240 in it would make it hazardous to the bomb makers, as well as probably unreliable and unpredictable. Typical 'reactor-grade' plutonium recovered from reprocessing used power reactor fuel has about one third non-fissile isotopes (mainly Pu-240)d.
Allowing the fuel to stay longer in the reactor increases the concentration of the higher isotopes of plutonium, in particular the Pu-240 isotope. For weapons use, Pu-240 is considered a serious contaminant,..., but any significant proportions of Pu-240 in it would make it hazardous to the bomb makers, as well as probably unreliable and unpredictable. Typical 'reactor-grade' plutonium recovered from reprocessing used power reactor fuel has about one third non-fissile isotopes (mainly Pu-240)d.