基于光纤和脉冲光释光技术的辐射探测系统研究

doi:10.11889/j.0253-3219.2020.hjs.43.070402

Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (7): 70402-070402.doi: 10.11889/j.0253-3219.2020.hjs.43.070402

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles Next Articles

Study of radiation monitoring system based on fiber and pulsed-OSL technology

Wenbo LI,Dingfeng LIU,Mingming SHEN,Rongjun LI Xiaoling WU,Wenkang DENG

Wuhan Second Ship Design and Research Institute, Wuhan 430205, China

Received:2020-04-21 Revised:2020-06-10 Online:2020-07-15 Published:2020-07-16
About author:LI Wenbo, male, born in 1985, graduated from Peking University with a doctoral degree in 2013, focusing on radiation protection and monitoring
Supported by:
National Technology Basic Research Program(JSJL2017207B012)

Abstract

Abstract: Background

Optically stimulated luminescence (OSL) technology has recently been successfully used in the field of personal dosimetry, etc.. OSL detectors normally have the advantages of small size, strong anti-electromagnetic interference, anti-radiation, and wide dose linear range while detectors for traditional radiation monitoring system are large in size, susceptible to electromagnetic interference, and poor radiation resistance.

Purpose

This study aims to design a remote online radiation dose (rate) monitoring system based on OSL technology for diversity applications.

Methods

Al₂O₃:C was used as the radiation-sensitive material, with high sensitivity and long lifetime. Pulsed-OSL technology was adopted to ignore the high-intensity luminescence of the lens and fiber caused by laser exposure. Remote radiation monitoring was realized by using fiber to transmit stimulation light and OSL. The interference filter and absorbing filter were combined to block all reflected stimulation light. The OSL detector was located in the radiation field for performance test experiment, while other components were located outside the radiation field.

Results

Experimental results show that this radiation monitoring system has a dose measurement range of 79 μGy~5 Gy, energy responses (60 keV~1.5 MeV, relative to ¹³⁷Cs) are within ±25% of the air kerma measurement (with endcap of 1.5 mm Fe) and ambient dose equivalent measurement (with endcap of 0.1 mm Al), while the angular response is within ±10% for 0°~135° (relative to 0°).

Conclusions

Radiation monitoring system based on fiber and pulsed-OSL technology has advantages of small-size detector, strong anti-electromagnetic interference, low detection limit, and wide measurement range, hence suitable for online real-time remote monitoring of dose (rate) in nuclear facilities such as nuclear power plant and nuclear power ship.

Key words: Optically stimulated luminescence (OSL), Al₂O₃:C, Fiber, Radiation monitoring

CLC Number:

TL816⁺.9

Wenbo LI, Dingfeng LIU, Mingming SHEN, Rongjun LI Xiaoling WU, Wenkang DENG. Study of radiation monitoring system based on fiber and pulsed-OSL technology[J].Nuclear Techniques, 2020, 43(7): 70402-070402.

Figures/Tables 16

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Study of radiation monitoring system based on fiber and pulsed-OSL technology

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