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Science and Technology of Nuclear Installations
Volume 2017, Article ID 8918424, 6 pages
https://doi.org/10.1155/2017/8918424
Research Article

Physical Analysis of the Initial Core and Running-In Phase for Pebble-Bed Reactor HTR-PM

1School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206, China
2Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

Correspondence should be addressed to Jingyu Zhang; moc.361@tntpop

Received 19 December 2016; Revised 9 March 2017; Accepted 23 March 2017; Published 16 April 2017

Academic Editor: Rafael Miró

Copyright © 2017 Jingyu Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The pebble-bed reactor HTR-PM is being built in China and is planned to be critical in one or two years. At present, one emphasis of engineering design is to determine the fuel management scheme of the initial core and running-in phase. There are many possible schemes, and many factors need to be considered in the process of scheme evaluation and analysis. Based on the experience from the constructed or designed pebble-bed reactors, the fuel enrichment and the ratio of fuel spheres to graphite spheres are important. In this paper, some relevant physical considerations of the initial core and running-in phase of HTR-PM are given. Then a typical scheme of the initial core and running-in phase is proposed and simulated with VSOP code, and some key physical parameters, such as the maximum power per fuel sphere, the maximum fuel temperature, the refueling rate, and the discharge burnup, are calculated. Results of the physical parameters all satisfy the relevant design requirements, which means the proposed scheme is safe and reliable and can provide support for the fuel management of HTR-PM in the future.