Dynamic analysis and application of fuel elements pneumatic transportation in a pebble bed reactor

Significance statement

There are several hundred meters of pipes in a pebble bed reactor. Every day thousands of fuel elements are transported in the pipes. The dynamic analysis of the fuel elements is of great significance. Firstly, the collisions between the fuel elements and the pipes may damage the fuel element. Secondly, the transportation efficiency of the fuel element is determined by its movement. Thirdly, the collisions will influence the stability of the pipes. By the dynamic analysis of the fuel element, safety, efficiency, reliability, stability and economy of the reactor can be ensured.

Featured Authors Information

Renewable Energy Global Innovations

Dong DU

Professor in Department of Mechanical Engineering, Tsinghua University.

Member of IEEE and SPIE.

Research Interests: Intelligent control, robotics, automation, materials processing technology

Dynamic analysis and application of fuel elements pneumatic transportation in a pebble bed reactor. Renewable Energy Global Innovations

Hongbing LIU

Ph.D. candidate in Department of Mechanical Engineering, Tsinghua University.

Research Interests: High temperature gas cooled reactor, pneumatic transportation, automation.

Dynamic analysis and application of fuel elements pneumatic transportation in a pebble bed reactor. Renewable Energy Global innovations

Journal Reference

Energy, Volume 79,  2015, Pages 33-39. Hongbing Liu1,2, Dong Du1,2 , , Zandong Han1,2, Yirong Zou1,2, Jiluan Pan1,2

Show Affiliations
  1. Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, China
  2. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

Abstract

Almost 10,000 spherical fuel elements are transported pneumatically one by one in the pipeline outside the core of a pebble bed reactor every day. Any failure in the transportation will lead to the shutdown of the reactor, even safety accidents. In order to ensure a stable and reliable transportation, it’s of great importance to analyze the motion and force condition of the fuel element. In this paper, we focus on the dynamic analysis of the pneumatic transportation of the fuel element and derive kinetic equations. Then we introduce the design of the transportation pipeline. On this basis we calculate some important data such as the velocity of the fuel element, the force between the fuel element and the pipeline and the efficiency of the pneumatic transportation. Then we analyze these results and provide some suggestions for the design of the pipeline. The experiment was carried out on an experimental platform. The velocities of the fuel elements were measured. The experimental results were consistent with and validated the theoretical analysis. The research may offer the basis for the design of the transportation pipeline and the optimization of the fuel elements transportation in a pebble bed reactor.

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