Nuclear Techniques ›› 2019, Vol. 42 ›› Issue (10): 100401-100401.doi: 10.11889/j.0253-3219.2019.hjs.42.100401

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

Research on optimum detection angle and switching point of non-radioactive nuclear ash bucket level meter

Xicheng XIE1,Yuanyuan ZHANG2,Yajuan GUO1,Wanchang LAI3()   

  1. 1. Hebei North University, Zhangjiakou 075000, China
    2. Changping Campus Management Office of Peking University, Beijing 102249, China
    3. Chengdu University of Technology, Chengdu 610000, China
  • Received:2019-05-27 Revised:2019-07-20 Online:2019-10-13 Published:2019-10-16
  • Contact: Wanchang LAI E-mail:783837376@qq.com
  • About author:XIE Xicheng, female, born in 1988, graduated from Chengdu University of Technology with a doctoral degree in 2015, focusing on nuclear technology and applications
  • Supported by:
    Supported by Dr. XIE Xicheng Fund of Hebei North University

Abstract: Background

Material level detection is a very important issue for the automatic control of thermal power. How to monitor the material and powder level has become an urgent problem for the thermal power plant.

Purpose

This study aims to find out the best detection angle and switching point to provide theoretical guidance for instrument development and sensitivity improvement.

Methods

First of all, Monte Carlo simulation was applied to the optimum design of the best detection angle for non-radioactive nuclear ash hopper level meter in the range of 0°~90°. Then the angle between the ash bucket wall and the horizontal plane for the optimum detection angle was determinated. Finally, a complete model of dust hopper and passive nuclear level gauge for electrostatic precipitator (ESP) was established, and the high and low switch points material level were by "second derivative method".

Results

When the angle between the probe and the horizontal line reaches 30°, the maximum energy flux is detected while the angle between the ash bucket wall and the horizontal plane is 61.224°. The absorption dose rate curve of material level meter with different fly ash height at 30° detection angle is obtained.

Conclusions

This study provides theoretical guidance for the development of non-radioactive nuclear ash hopper level meter instrument and improvement of sensitivity in thermal power plants.

Key words: Monte Carlo simulation, The best detect angle, Switching point, Passive nuclear ash bucket level meter

CLC Number: 

  • TL812+.1