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2638182 
Journal Article 
Preparation of spherical fuel elements for HTR-PM in INET 
Zhou Xiangwen; Lu Zhenming; Jie, Z; Bing, Liu; Zou Yanwen; Tang Chunhe; Tang Yaping 
2013 
1 
Nuclear Engineering and Design
ISSN: 0029-5493
EISSN: 1872-759X 
263 
456-461 
WOS:000324847000042 
The spherical fuel elements were successfully manufactured in the period of HTR-10. In order to satisfy the mass production of fuel elements for HTR-PM, several measures have been taken in modifying and optimizing the manufacture process of fuel elements. The newly developed overcoater system and its corresponding parameters exhibited good stability and high efficiency in the preparation of overcoated particles. The optimized carbonization process could reduce the carbonization time from more than 70 h to 20 hand improve the manufacturing efficiency. Properties of the manufactured spherical fuel elements and matrix graphite balls met the design specifications for HTR-PM. The mean free uranium fraction of 5 consecutive batches was 8.7 x 10(-6). The optimized fuel elements manufacturing process could meet the requirements of design specifications of spherical fuel elements for HTR-PM. (c) 2013 Elsevier B.V. All rights reserved. 
HTR-PM; Spherical fuel element; UO2 Kernels; TRISO-coated fuel particles; Cold quasi-isostatic molding