Fast And Thermal Neutron Induced Prompt Gamma-ray Assay Coal Calorific Value Q <sub> Net Ar </ Sub>

In the coal industry, it is often necessary to have suitable quantitative date avaitable concerning the chemical concentrations,quantity of heat,volatile matter yield in coal.Untill the recent years, this information was obtained by means of sampling techniques associated with conventional chemical anylysis.These methods are ill-suited to plant automation for its low efficiency.The nuclear techniques,owing to the penetration power of the radiations,can provide new control prospects that will eliminate the difficulties linked to the sampling techinques.hereby allowing direct on-line analysis of the coal.Neutron-induced prompt gamma-ray analysis(NIPGA) can be used for fast analysis of coal .Fast-thermal neutron interact with the neclie of the coal to produce inelastic scatering(n,n, ) reaction and neutron cappture(n, ) reaction.We can obtain the chemical concentrations in coal by means of induced prompt gamma-ray spectrum .thereby calculate the quantity of heat.Pulsed neutron generator brings valuable help in this methed for its fast open-shut capability and improving signal-to-noise ratio.This paper introduce the analysis methed,principle and system of the quantity of heat by means of the fast-thermal neutron-induced gamma-ray by pulsed neutron generator. Wo avoid the interfere of different elements with the multiple linear regression on spectra. The deviation of the quantity of heat between NIPGA and conventional chemical anylysis is less than 0.4MJ/kg.