开发基于液体薄膜的放射性溶液中总α活性在线测量技术
Li Li1, Yingtong Fang1, Yaping Zhao1
1China Nuclear Power Engineering Co., Ltd, Beijing, China; CNNC Engineering Research Center for Fuel Reprocessing, Beijing, China.
概括
本研究介绍了一种新的旋转轮液装置,用于精确在线测量核溶液中的α放射性. 该系统为放射性监测提供了更高的准确性,抗污染性和实时校准.
科学领域:
- 核化学与工程 核化学与工程
- 放射化学 放射化学是指辐射化学.
- 分析化学 分析化学
背景情况:
- 在线测量放射性溶液中的α放射性是关键的,但具有挑战性.
- 传统方法受到探测器污染,复杂性和校准问题的影响.
- 在核工艺中对α发射物的实时监测需要先进的仪器仪表.
研究的目的:
- 开发和验证一款创新的在线设备,用于准确测量阿尔法放射性.
- 解决现有方法的局限性,包括污染和校准困难.
- 为了提供一个强大的解决方案,用于高精度,在放射化学流中实时的α监测.
主要方法:
- 一种旋转轮液薄膜技术,产生稳定,薄的液薄膜,用于直接的α检测.
- 集成压缩空气净化系统,以保护探测器免受气溶的影响.
- 包括一个内置的校准磁盘用于在线测量校准.
- 使用高效的ZnS(Ag) 闪探测器.
主要成果:
- 在广泛的活动范围 (1.16×106~1.16×109 Bq·L−1) 中表现出极好的线性 (R2=0.9996).
- 实现了高精度 (RSD ≤2.61%) 和低检测极限 (1.45 × 104 Bq·L-1).
- 在10天的连续运行中表现出良好的长期稳定性 (RSD = 1.91%).
结论:
- 开发的设备提供了卓越的检测效率和抗污染性能.
- 在线校准能力和长期稳定性满足严格的核工业要求.
- 这项技术可以在复杂的放射性溶液中实现高精度,实时的α监测.
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