小颗粒游离释放监测仪最小可检测活性的改进

IF 0.9 4区工程技术 Q3 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Technology & Radiation Protection Pub Date : 2021-01-01 DOI:10.2298/ntrp210222018p

S. Pohuliai, Igors Krainukovs

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引用次数: 1

摘要

本文介绍了一种小型自由释放监测仪的研制成果，该监测仪专为核企业和实验室工作人员从辐射控制中释放的重达50公斤的材料、各种手动工具、设备和仪器而设计。为了提高受控放射性核素的配准灵敏度，采用基于3“x3”尺寸的NaI (Tl)晶体的12个闪烁单元作为伽玛辐射探测器。监测仪测量室容积为200升，低背景屏蔽厚度选择50 mm。所设计的监测仪对点源123I、131I、99mTc、18F的最小可探测活度值均优于100 Bq，测量时间不超过60 s。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Improvement of the minimum detectable activity of a free release monitor for small articles

This paper presents results of the development of a small-sized free release monitor designed for the release of materials, various hand tools, equipment and instruments of nuclear enterprises and laboratories staff that weight up to 50 kg, from radiation control. To increase the registration sensitivity of controlled radionuclides, 12 scintillation units based on a 3"x3" sized NaI (Tl) crystal were used as gamma-radiation detector. Volume of the measuring chamber of the monitor amounted to 200 liters, the thickness of the low-background shielding was chosen 50 mm. The values of the minimum detectable activity of the designed monitor for the point sources 123I, 131I, 99mTc, 18F were better than 100 Bq with measurement time not exceeding 60 s.

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来源期刊

Nuclear Technology & Radiation Protection NUCLEAR SCIENCE & TECHNOLOGY-

CiteScore

2.00

自引率

41.70%

发文量

审稿时长

6-12 weeks

期刊介绍： Nuclear Technology & Radiation Protection is an international scientific journal covering the wide range of disciplines involved in nuclear science and technology as well as in the field of radiation protection. The journal is open for scientific papers, short papers, review articles, and technical papers dealing with nuclear power, research reactors, accelerators, nuclear materials, waste management, radiation measurements, and environmental problems. However, basic reactor physics and design, particle and radiation transport theory, and development of numerical methods and codes will also be important aspects of the editorial policy.