The dose calculation method research for the criticality accident alarm system instrument

This paper sets up a detailed model and does a validation calculation work for a labyrinth experiment in the international handbook of evaluated criticality safety benchmark experiments. A two-step method is used to predict the neutron detector's readings using a three-dimensional Monte Carlo code. The calculation results are compared to the experiment readings, and the calculation biases statistic is done for the total 448 detect points. According to summarize the process in the location choosing and threshold setup for the criticality accident alarm system in the practice, the validation content done in this paper is evaluated. The dose calculation method research for the criticality accident alarm system instrument carried out in this paper is a base task in the criticality accident alarm system setup process. It can provide reference data for calculation precision in practice, and it can also be used for the neutron shielding configuration installations' evaluation work. (authors)