Abstract

Uranium hydride is commonly used to store hydrogen or its isotopes in a solid state. The Self-Assaying Tritium Accountancy and Containment Unit for ITER (STACI) is a 5.2-kg bed of depleted uranium (dU) capable of holding up to 33 mol of hydrogen or its isotopes. This paper is a summary of data analysis of past experimental campaigns with STACI, with the aim of describing the kinetics and thermodynamics of the hydriding process. Computed tomography imaging was performed on STACI both before and after its experimental campaign, and a high degree of swelling was observed in the dU. Literature on studies in regard to the swelling of large (multikilogram) quantities of uranium hydride for storage applications was not identified during this study. Data from the experimental campaign, as well as data on the formation reaction, are presented. The authors hope to create an analytical model of STACI based on these data.

摘要

氢化铀通常用于以固态储存氢或其同位素。ITER (STACI) 的自测氚计算和密封装置是一个 5.2 千克的贫铀 (dU) 床，能够容纳多达 33 mol 的氢或其同位素。本文是对过去 STACI 实验活动数据分析的总结，旨在描述氢化过程的动力学和热力学。在 STACI 实验前后都进行了计算机断层扫描，在 dU 中观察到高度肿胀。在这项研究中，没有发现关于储存应用的大量（数公斤）氢化铀膨胀的研究文献。提供了来自实验活动的数据以及地层反应的数据。