Gas-Phase Conversion of Uranium Mononitride in a Nitrating Atmosphere

被引：1
|
作者：
Kulyukhin, S. A. [1 ]
Nevolin, Yu. M. [2 ]
Gordeev, A. V. [1 ]
机构：
[1] Russian Acad Sci, Frumkin Inst Phys Chem & Electrochem, Leninskii Pr 31,Korp 4, Moscow 119071, Russia
[2] Moscow MV Lomonosov State Univ, Dept Chem, Radiochem Chair, Moscow, Russia
来源：
RADIOCHEMISTRY | 2019年 / 61卷 / 01期
关键词：
uranium mononitride; gas-phase conversion; nitrating atmosphere; WATER-SOLUBLE COMPOUNDS; ZR OXIDES; MO; SR;
D O I：
10.1134/S1066362219010028
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Gas-phase conversion of UN to water-soluble compounds in NOx-air, NOx-H2O (vapor)-air, or HNO3 (vapor)-air atmosphere (hereinafter, nitrating atmosphere) at temperatures from 298 to 673 K was studied. The use of the oxidizing atmosphere based on NOx gases allows the conversion to be performed at a lower temperature. The process yields both UO3 and hydrates of UO2(NO3)(2). The highest conversion of UN to water-soluble compounds, approximate to 80%, is reached at approximate to 565 K. In the course of gas-phase conversion in NOx-H2O (vapor)-air and HNO3 (vapor)-air atmospheres, UN transforms into water-soluble compounds (nitrates, hydroxynitrates). The gas-phase conversion of UN in an NOx-H2O (vapor)-air atmosphere occurs less efficiently than that in an HNO3 (vapor)-air atmosphere.
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页码：5 / 11
页数：7
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