Study on basic characteristics of hollow filament polyimide membrane in tritium separation and its application to tritium monitors

中空丝聚酰亚胺膜氚分离基本特性研究及其在氚监测器中的应用

• 批准号: 12680513
• 负责人: SASAKI Shinichi
• 金额: $ 2.3万
• 依托单位: High Energy Accelerator Researcgh Organization(KEK)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12680513/
• 关键词: hollow-filament type membrane; tritium; polyimide; accelerator; environmental radioactivity; slack(gas) monitor; separation and enrichment; radiation monitoring system; 電離箱

In order to establish monitoring method of tritium in air released from accelerator beam-line tunnels through the stacks, a new real-time continuous gas monitoring system using a follow-filament polyimide membrane as a gas-separation device, has been proposed and basic gas-separation characteristics of membranes have been investigated experimentally in this study. Especially, the separation characteristics of hydrogen isotopes in nitrogen and water in dry-air were measured extensively, and a computer simulation using the simplified cross-flow model for the gas separation was also performed. The result showed that the polyimide membrane module could enrich significantly hydrogen isotopes and water vapor from nitrogen and dry air, and there were not observed remarkable isotope effects in separation characteristics between hydrogen isotopes (H2 and D2). It can be concluded from these results that the membrane is useful for the real time tritium monitoring. A conceptual design of a tritium monitoring system in also proposed. The results obtained in this study were presented at the several international conferences/meetings and were published in the journals.

为了建立加速器束线隧道通过堆释放的空气中氚的监测方法，提出了一种新的实时连续气体监测系统，该系统采用随丝聚酰亚胺膜作为气体分离装置，并对膜的基本气体分离特性进行了实验研究。特别是对干燥空气中氮和水的氢同位素分离特性进行了广泛的测量，并采用简化的气体分离错流模型进行了计算机模拟。结果表明，聚酰亚胺膜组件能显著富集氮气和干燥空气中的氢同位素和水蒸气，且氢同位素（H2和D2）之间的分离特性未观察到明显的同位素效应。实验结果表明，该膜可用于真实的实时氚监测。本文还提出了一种氚监测系统的概念设计。本研究取得的结果在几次国际会议上提出，并发表在期刊上。

项目成果

A.Shimada: "Development of Tritium Monitor Using Hollow Filament Polyimide Membrane"Proceedings of the 10th International Congress of the International Radiation Protection Association (IRPA-10). 4a248 (2000)

A.Shimada：“使用中空丝聚酰亚胺膜开发氚监测器”国际辐射防护协会第十届国际大会（IRPA-10）会议记录。

佐々木慎一: "加速器環境のモニタリング"放射線. Vol.26,No.3. 11-22 (2000)

佐佐木真一：《辐射加速器环境的监测》Vol.26，No.3（2000）。

Shinichi Sasaki: "Radiation Monitoring around Accerator Facilities (in Japanese)"Ionizing Radinatoin. Vol.26, No.3. 11-22 (2000)

佐佐木真一：“加速器设施周围的辐射监测（日语）”电离辐射。

島田亜佐子: "中空糸高分子膜を用いたトリチウムの濃縮について"KEK Proceedings. 2000-13. 37-41 (2000)

Asako Shimada：“利用中空纤维聚合物膜富集氚”KEK 2000-13 (2000)。

Shinichi Sasaki: "Basic characteristics of hollow-filament polyimide membrane in gas separation and application to tritium monitors"Journal of Radioanalytical and Nuclear Chemistry. (To be published).

佐佐木真一：“中空丝聚酰亚胺膜在气体分离中的基本特性及其在氚监测器中的应用”放射分析与核化学杂志。