原子能科学技术2025，Vol.59Issue(10)：2233-2240,8.DOI:10.7538/yzk.2025.youxian.0006
基于瞬发γ中子活化分析的氢化锆高温释氢检测技术研究
Study on Detection of High Temperature Hydrogen Release in Zirconium Hydride Based on Prompt Gamma Neutron Activation Analysis
摘要
Abstract
To achieve the quantitative analysis of hydrogen release from uranium zirconium hydride(U-ZrH)fuel elements at high temperatures,a prompt gamma neutron activation analysis(PGNAA)platform was established using the experimental channel of the hot column of the Xi'an Pulsed Reactor.The PGNAA platform utilizes neutron irradiation to induce gamma-ray emissions from hydrogen nuclei,which are then detected and analyzed to determine hydrogen content.The system was integrated into the experimental channel of the Xi'an Pulsed Reactor,leveraging its neutron source for precise measurements.The PGNAA system was calibrated using standard hydrogen-containing samples,demonstrating a hydrogen detection limit of 0.4 mg with relative uncertainty of 8.5%,showcasing its high sensitivity and reliability for hydrogen quantification.The experiments were conducted in a closed cavity to simulate high-temperature environments typical of uranium-zirconium-hydride's reactor operations.Zirconium hydride samples were heated to average temperatures of 757℃and 814℃,and the hydrogen release was monitored in real-time using the PGNAA system.The closed cavity ensured that all released hydrogen was contained and accurately measured,minimizing external interference and maintaining experimental integrity.The hydrogen released from the zirconium hydride samples was measured at the two target temperatures.The PGNAA system detected gamma rays emitted from hydrogen nuclei,allowing for precise quantification of the hydrogen content.The results were compared with reference data from previous studies to validate the accuracy of the measurements.The PGNAA platform demonstrated a high sensitivity for hydrogen detection,with a detection limit of 0.4 mg and an uncertainty of 8.5%.This makes it a reliable tool for studying hydrogen release in nuclear materials,particularly under high-temperature conditions.The experiments reveal that hydrogen release from zirconium hydride samples increase significantly at higher temperatures.The measurements at 757℃and 814℃provided valuable data on the temperature dependence of hydrogen release,which is critical for understanding the behavior of nuclear fuel elements under extreme conditions.The results of the hydrogen release measurements are in good agreement with reference data,confirming the accuracy and reliability of the PGNAA platform.This consistency underscores the platform's potential for future applications in nuclear research.The successful implementation of this experiment provides a robust and reliable experimental platform for future studies on hydrogen release in U-ZrH and other metal hydrides.This platform can be used to optimize fuel element design,improve nuclear reactor safety,and enhance the performance of nuclear materials under high-temperature conditions.关键词
氢化锆/高温释氢/瞬发γ中子活化分析Key words
ZrHx/high temperature hydrogen release/prompt gamma neutron activation analysis分类
能源科技引用本文复制引用
王立鹏,苏春磊,袁建新,长孙永刚,邬泽鹏,张信一,姜夺玉,胡田亮..基于瞬发γ中子活化分析的氢化锆高温释氢检测技术研究[J].原子能科学技术,2025,59(10):2233-2240,8.基金项目
国家自然科学基金(12275219) （12275219）
