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Lin C.-Y.,Wuhan Secondary Institute of Ships | He L.,Wuhan Secondary Institute of Ships | Chen Y.,Wuhan Secondary Institute of Ships | Nie L.-X.,Wuhan Secondary Institute of Ships | And 2 more authors.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2016

For further developing the applications of Silicon Photomultiplier tubs (SiPM) in scintillator detector, a detector model that structured by an optical coupling glass bridging plastic scintillator and SiPM is used to test the bias voltage, temperature variation, anti-magnetic and irradiation property of SiPM, then the test results are analyzed. Analysis results indicate that the test date can be used to advise the application of SiPM for actual projects. © 2016, Editorial Board of Nuclear Electronics & Detection Tech. All right reserved.


Liu L.-J.,University of South China | Liu L.-J.,Wuhan Secondary Institute of Ships | Qu G.-P.,University of South China | Chen X.-L.,Wuhan Secondary Institute of Ships | And 3 more authors.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2016

For a scintillator detector used for gamma spectrometry, the generation, transport and detection of optical photons have a great impact on the energy spectrum resolution. A Monte Carlo simulation of Na(TI) and LaBr: Ce3+ scintillator detect 662 keV γ-ray has been implemented with Geant4 toolkit to simulate accurately energy resolution of scintillator detector. The reliability and rationality of this simulation is confirmed by comparing with the measurements. The code of simulation can be used as development tool for the design of scintillator detectors. © 2016, Editorial Board of Nuclear Electronics & Detection Tech. All right reserved.


Xu H.,Wuhan Secondary Institute of Ships | Cheng C.,Wuhan Secondary Institute of Ships | Liu L.,Wuhan Secondary Institute of Ships | Liu L.,University of South China | And 3 more authors.
He Jishu/Nuclear Techniques | Year: 2017

Background: The silicon photomultiplier (SiPM) is a new type of photo detector consisting of avalanche photodiode arrays operated in Geiger mode. Its photocoupling performance with scintillation crystal is helpful for gamma spectrometry. Purpose: This study aims to provide a reliable tool for the design of scintillation detector photocoupling with SiPM to achieve effective gamma spectrometry with the GEANT4 code. Methods: GEANT4 toolkit is used to simulate NaI(TI) and LaBr3:10%Ce3+ scintillation crystal detect 662-keV γ-ray photocoupling with SiPM by building a complete Monte Carlo model of a scintillator includes ionizing particle and optical photon transport. Energy resolution of 662-keV gamma spectrum is modified with the contribution of dark current noise amplified by the electronic system and statistical fluctuation of optical photon absorbed by avalanche photodiode of SiPM which was previously illuminated with monochromatic LED light. Results: Simulation results show that energy resolution of 662-keV gamma spectrum is in accordance with the result of experimental measurement. A group of parameters (Pr,s) which corresponded to scintillation crystal intrinsic energy resolution is obtained simultaneously. Conclusion: The GEANT4 simulation of NaI(TI) and LaBr3:10%Ce3+ scintillation crystals photocoupling with SiPM for 662-keV γ-ray spectrometry results consistently with experimental energy spectrum, and confirms the reliability and rationality of material properties and parameters which set in GEANT4 toolkit. © 2017, Science Press. All right reserved.


Ren C.,University of South China | Ren C.,Wuhan Secondary Institute of Ships | Chen X.-L.,Wuhan Secondary Institute of Ships | Li X.-H.,University of South China | And 4 more authors.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2014

In this paper, the influence of the detection methods and the geometry size of the radioactive iodine monitoring device to the detection efficiency, which is an important monitoring equipment of airborne radioactivity monitoring channel in nuclear power plant, has been studied with Monte Carlo method. The rules of the simulation results have been summarized and provide useful data reference and theoretical support for the development of radioactive iodine detection devices.


Ren C.,University of South China | Ren C.,Wuhan Secondary Institute of Ships | Li X.-H.,University of South China | Chen X.-L.,Wuhan Secondary Institute of Ships | And 4 more authors.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2014

This paper describes an analog circuit for airborne radioactive iodine detector. In the design of the detector, the traditional design idea of separating preamplifier and main amplifier has been abandoned, replaced by setting the pre-amplifier and the main amplifier as a whole in the probe. In order to achieve long distance transmission of analog signal, a drive circuit is provided at the front end of the cable, which has the function of impedance matching and current amplification. The drive circuit achieves the goal of no need to match the impedance in the rear end of the signal cable, it enhances the electronics compatibility of the probe. The research results have been verified theoretically and experimentally, and it has great reference value for engineering application.


Wang H.,Harbin Engineering University | Wang H.,Wuhan Secondary Institute of Ships | Liu C.-Y.,Harbin Engineering University | Luo P.,Wuhan Secondary Institute of Ships | Chen X.-L.,Wuhan Secondary Institute of Ships
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2013

According to the radioactivity monitoring requirements for exhaust air with the hydrogen waste gas from the waste gas processing system of the nuclear power plant, a kind of on-line monitoring scheme is designed to efficiently solve the problem of radiation monitoring of 85Kr and 133Xe in waste gas containing hydrogen. The detection efficiency and the influences of the environmental gamma background for the monitor have been calculated by Monte Carlo code. Thereby, important theoretical references are provided for the equipment development and production. The calculated results show that plastic scintillator with the size of φ 10 × 0.5 mm that is based on the on-line monitoring scheme fully meets the radioactivity monitoring requirements for exhaust air with the hydrogen waste gas from the waste gas processing system of AP1000 nuclear power plant. If the gamma environmental background is smaller than 10μ Gy/h, the lead shielding is not needed.


Yan B.,Harbin Engineering University | Yan B.,Wuhan Secondary Institute of Ships | Liu C.-Y.,Harbin Engineering University | Dai C.-B.,Wuhan Secondary Institute of Ships | An R.,Wuhan Secondary Institute of Ships
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2015

To solve the problem of the upper limit of the radioactivity measuring requirements for the HTGR on-line burn-up measure system, the structure of the device can be further optimized. Aim to optimized system, this thesis uses MCNP to simulate shield, collimator and multi-sphere impact on the detection upper limit. Making a synthesis of simulation and actual measured results an optimizing structure is design. The result shows: this plan can enhance the shield efficiency and meet the upper limit counts for the HPGe detector. © 2016, Editorial Board of Nuclear Electronics & Detection Tech. All right reserved.


Ren X.-P.,Liao Ning Hong Yan He Nuclear Power Co. | Luo P.,Wuhan Secondary Institute of Ships | Li S.,Wuhan Secondary Institute of Ships | Xu W.-F.,Wuhan Secondary Institute of Ships | Liu D.,Wuhan Secondary Institute of Ships
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2015

Aim at the requirements for radioactivity waste liquid discharge of nuclear power plant, NaI(Tl) scintillator detector cooperated with eccentric diameter is used to make the on-line monitoring for the waste fluid discharge system. And the analog computation is performed for the embedded measuring method to give the capacity of sampling pipe that meets the lower limit of the measurement. According to this design scheme, the development of principleprototype is performed, and experimentalresults are given to the principle prototype by the standard liquid radioactive source. The deviation between the analog computation and experiment is equal to +9.93%. © 2015, Editorial Board of Nuclear Electronics & Detection Tech. All right reserved.

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