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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. Source


Ren X.-P.,Liaoning Hongyanhe 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. Source


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. Source


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. Source


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. Source

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