Year
2010
Abstract
The accumulation of nuclear spent fuels is the current big issue in Korea as increasing of dependence on nuclear energy. One of the most feasible options to reduce the volume and the radiotoxicity of spent fuels and to produce the energy by reusing the fissionable nuclear materials is the SFR program linked with pyro-processing. The fissile content analysis is very important in the quality assurance of the fabricated fuel, safety of the reactor and economics of the reactor operation. Lead slowing down spectrometer is the good way to analyze the isotopic fissile contents directly in a near real time without an interference of neutron and gamma background from spent fuels. Several sensitivity calculations were performed and neutron spectrum analysis, neutron energy dependent fission signatures and energy resolution were introduced. The acceleration system is optimized to get the proper neutron source. Target was optimally designed. However, further calculation is necessary for the system optimization. The improvement of the fissile assay technology will increase an international transparency and credibility on the reuse of the spent nuclear fuel as well.