Joe Kihsoo, Jeon Young-Shin, Song Byung-Chul, Han Sun-Ho, Jung Euo-Chang, Song Kyuseok
Korea Atomic Energy Research Institute, Yusung, Daejeon, Republic of Korea.
Appl Radiat Isot. 2010 Mar;68(3):505-10. doi: 10.1016/j.apradiso.2009.10.055. Epub 2009 Nov 1.
Correlations among the alpha activity ratios of (238)Pu/((239)Pu+(240)Pu), the alpha specific activities of Pu and the atom % abundances of Pu isotopes were derived for the plutonium samples obtained from high burnup fuel samples from pressurized water reactors. Using the alpha activity ratios of (238)Pu/((239)Pu+(240)Pu) determined by alpha spectrometry, the alpha specific activities of Pu as well as the atom % abundances of the plutonium isotopes in the unknown samples were calculated without depending on mass spectrometry. The calculated alpha specific activities of Pu agreed with those determined by experiment within 2%, and the atom % abundances of the Pu isotopes agreed within 4% for (238)Pu, 5% for (239)Pu, 7% for (240)Pu and 5% for (242)Pu, respectively. In addition, an attempt was made to elucidate a correlation between the fuel burnup and the alpha activity ratio of (238)Pu/((239)Pu+(240)Pu) at a range of the burnup from 35.5 to 62.9 GWd/MtU.
对于从压水反应堆高燃耗燃料样品中获得的钚样品，推导了(238)Pu/((239)Pu+(240)Pu)的α活度比、钚的α比活度与钚同位素的原子百分比丰度之间的相关性。利用α能谱法测定的(238)Pu/((239)Pu+(240)Pu)的α活度比，在不依赖质谱分析的情况下计算了未知样品中钚的α比活度以及钚同位素的原子百分比丰度。计算得到的钚的α比活度与实验测定值的偏差在2%以内，钚同位素的原子百分比丰度对于(238)Pu的偏差在4%以内，对于(239)Pu的偏差在5%以内，对于(240)Pu的偏差在7%以内，对于(242)Pu的偏差在5%以内。此外，还尝试在35.5至62.9 GWd/MtU的燃耗范围内阐明燃料燃耗与(238)Pu/((239)Pu+(240)Pu)的α活度比之间的相关性。
