1AW 溶液中 U、Np 和 Pu 的分析

研究了 H 2 O2同时调节镎、钚、铀价态至 Np（Ⅳ）、Pu（Ⅳ）以及 U（Ⅵ）的条件,在6 mol/L HNO3浓度下,使用1.5%H 2 O2作为氧化还原剂对1AW 进行调价,吸附上 UTEVA 柱并淋洗后,对钚、镎和铀进行洗脱。对模拟放射性样品进行预处理后,其中铀、镎、钚单独顺序洗脱的回收率分别为91.5%、119%、99.8%,137 Cs的去污因子高达7.4x104,单个样品操作时间约为1-1.5 h；若钚洗脱后铀、镎同时洗脱并使用 ED-XRF 测量可以减少操作时间,铀、镎的回收率分别为102.4%、93.9%。均满足样品分析及辐射防护要求。...

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Published in核化学与放射化学 Vol. 37; no. 3; pp. 153 - 159
Main Author 邓惟勤 谈树苹 陶苗苗 吴继宗 龚焱平 陈强
Format Journal Article
LanguageChinese
Published 中国原子能科学研究院 放射化学研究所,北京,102413%中核四零四有限公司,甘肃 嘉峪关,735100 2015
Subjects
1AW
H202
UTEVA
UTEVA
H 2 O2
1AW
Online AccessGet full text
ISSN0253-9950
DOI10.7538/hhx.2015.37.03.0153

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Summary:研究了 H 2 O2同时调节镎、钚、铀价态至 Np（Ⅳ）、Pu（Ⅳ）以及 U（Ⅵ）的条件,在6 mol/L HNO3浓度下,使用1.5%H 2 O2作为氧化还原剂对1AW 进行调价,吸附上 UTEVA 柱并淋洗后,对钚、镎和铀进行洗脱。对模拟放射性样品进行预处理后,其中铀、镎、钚单独顺序洗脱的回收率分别为91.5%、119%、99.8%,137 Cs的去污因子高达7.4x104,单个样品操作时间约为1-1.5 h；若钚洗脱后铀、镎同时洗脱并使用 ED-XRF 测量可以减少操作时间,铀、镎的回收率分别为102.4%、93.9%。均满足样品分析及辐射防护要求。
Bibliography:DENG Wei-qin, TAN Shu-ping, TAO Miao-miao, WU Ji-zong, GONG Yan-ping, CHEN Qiang （1. China Institute of Atomic Energy, P. O. Box 275（88）, Beijing 102413, China 2. 404 Company Limited, China National Nuclear Corpornation, Jiayuguan 735100, China）
11-2045/TL
UTEVA; H202; lAW
The condition of adjusting Np,Pu,U valence to Np（Ⅳ）,Pu（Ⅳ）and U（Ⅵ）by H 2 O2 has been studied,and 1.5% H2 O2 is used to adjust the valency of Np,Pu,U in 6 mol/L HNO3 ,after loading and washing.The yields of Pu,Np,U are 99.8%,1 1 9%,91.5%when they are stripped independently,the decontamination factor of 1 3 7 Cs is 7.4x10 4 .The operation time will be 1-1.5 h for one sample.If ED-XRF is involved to analyze Np and U, this two elements could be stripped together.The yields of U,Np are 102.4%,93.9%. The results meet the request of analysis and radiation protection for 1AW sample.
ISSN:0253-9950
DOI:10.7538/hhx.2015.37.03.0153