Plutonium isotopes and 137Cs in Dolon settlement near the Semipalatinsk Nuclear Test Site:: About 50 years after the first nuclear weapon testing
Plutonium isotopes and 137Cs in Dolon settlement near the Semipalatinsk Nuclear Test Site:: About 50 years after the first nuclear weapon testing
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DOI：
10.1023/b:jrnc.0000028213.90177.48
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发表时间：
2004-01-01
影响因子：
1.6
通讯作者：
Gusev, BI
中科院分区：
文献类型：
--
作者：
Sakaguchi, A;Yamamoto, M;Gusev, BI
最近关于在塞米巴拉金斯克核试验场（SNTS）进行的核爆炸给Dolon村居民带来的辐射剂量的争议促使我们更详细地评估该村土壤中残留的长寿命放射性核素Cs-137和Pu同位素（Pu-238、Pu-238、Pu-240）的水平和分布。在25个地点收集了深度约为30厘米和/或100厘米的土壤岩心样本，并对Cs-137和Pu同位素进行了分析。Cs-137和Pu-239、Pu-240的库存量分别在790 ~ 10310和530 ~ 14320 Bq/m(2)之间。从土壤中连续浸出的Pu表明，超过80%的Pu-239、Pu-240不能被锥热消解浸出。HNO3+H2O2，表明存在与熔融硅酸盐伴生的Pu。此外，使用CR-39聚碳酸酯的α -径迹射线照相技术证实，在土壤中存在来自Pu污染物的热颗粒，即使在第一次核武器试验大约50年后的今天。
Recent controversies concerning the radiation doses for populations living in the village of Dolon due to the nuclear explosions carried out at the Semipalatinsk Nuclear Test Site (SNTS) have encouraged us to evaluate in more detail the levels and distributions of residual long-lived radionuclides Cs-137 and Pu isotopes (Pu-238, Pu-238,Pu-240) in soils within the village. Soil core samples up to a depth of about 30 cm and/or 100 cm were collected at 25 sites and subjected to analysis of Cs-137 and Pu isotopes. The inventories of Cs-137 and Pu-239,Pu-240 were found to be in the wide range of 790-10,310 and 530-14,320 Bq/m(2), respectively. Sequential leaching of Pu from the soil showed that more than ca. 80% of the Pu-239,Pu-240 was not leached by hot digestion with cone. HNO3+H2O2, indicating the presence of Pu associated with fused silicates. Further, the presence of hot-particles from the Pu contaminants by alpha-track radiography technique using CR-39 polycarbonate was confirmed in the soil, even at present, after about 50 years from the first nuclear weapon testing.