Prediction of heat-conducting property of buffer backfilling materials for high level radioactive waste based on the grey system theory

This paper regards heat-conducting property of buffer backfilling materials and its influence factors as a system to study.After analyzing in depth experiment on heat-conducting property of buffer backfilling materials under different dry density，water content，porosity and saturation，on the basis of the principle of grey system theory，this paper has carried on systematic simulation to heat-conducting property and thermal diffusivity of buffer backfilling materials (as the system output) and its influence factors (as the system input)，having set up corresponding simulation model and designed algorithm.Furthermore，the author has developed “the simulation software system of the heat-conducting property of buffer backfilling materials” by using Microsoft Visual Studio as a developing instrument.With this system，the heat-conducting property of buffer backfilling materials system simulation and prediction in future has been realized successfully.From the results of real experimental data that the simulation software system operates，it can be concluded that this method has been good effect and high precision.The research has discussed the prediction questions for heat-conducting property of buffer backfilling materials (as output) in term of control (as input)，having not merely offered the platform and tool for prediction and simulation at the heat-conducting property of buffer backfilling materials，the more important thing is that it has established the foundation for the buffer backfilling materials with high heat-conducting how to design and exploit on the last artificial barrier of high-level radioactive waste repository in future.