Physics Benchmark Experiments and Analysis for Reflector-Control-Type Small Fast Reactors at TOSHIBA Nuclear Critical Assembly

Abstract

New physics benchmark experiments were successfully accomplished in order to study the basic characteristics of a reflector controlled small reactor 4S and to validate core design methods using Toshiba NCA critical facility. The experience gained through the analyses provides rationality of nuclear design methodology and nuclear library. Continuous Monte Carlo transport calculation method using JENDL3.2 enables core designers to predict reflector control characteristics with high reliability. Prediction accuracy for burn-up characteristics is needed for further design activity.

Keywords:

• small reactor with reflector control
• 4S reactor
• physics benchmark
• NCA
• criticality
• reflector worth
• Monte Carlo transport model
• JENDL3.2
• Sensitivity Study