A measurement method for density of HTR coated fuel particles porous pyrocarbon layer

The density of porous pyrocarbon layer of coated fuel particles is one of the important parameters of the coated fuel particles. It directly affects the performance of fuel elements. A measurement method, particle size analyzer method, to analyze the density of porous pyrocarbon was developed, and the standard uncertainty of this method was analyzed. Results showed that the particle size analyzer method has the advantages of fast measurement, large sampling number and high measurement accuracy. This method is very efficient for engineering application and is a promising candidate method to measure the density of porous pyrocarbon of coated fuel particles.