Abstract
Experiments on coupled cores performed at TCA were analysed using continuous energy Monte Carlo calculation code MCNP 4 A. Errors of neutron multiplication factors are evaluated using Indirect Bias Estimation Method proposed by authors. Calculation for simulation of pulsed neutron method was performed for 17×17+5G+17×17 core system and its of exponential experiment method was also performed for 16×9+3G+16×9 and 16×9+5G+16×9 core systems. Errors of neutron multiplication factors are estimated to be -1.5-0.6% evaluated by Indirect Bias Estimation Method. Its errors evaluated current pulsed neutron method and exponential experiment method are estimated to be 7%, but it is below 1% for estimation of subcriticality with the computed values applied Indirect Bias Estimation Method. Feasibility of subcriticality management is higher by application of the method to full scalefuel strage facility.
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