Calibration of Neutron Measuring Devices in Differently Sized Rooms with Different-Structural Irradiation Apparatuses
نویسنده
چکیده
The practical calibration rooms for neutron measuring devices are relatively small, where a large amount of room-reflected neutrons arise. Moreover the different structures of neutron irradiation apparatus influence the neutron spectrum and reference dose considerably. Therefore the influence of the neutron scattering was investigated in the three calibration rooms in different sizes and installed with different-structural irradiation apparatus in JNC. The investigation was made by MCNP-4B calculation of neutron spectrum and measurements with neutron dose equivalent rate meter and the shadow cone. By making corrections on above influences, the calibration factors of neutron dose equivalent rate meter obtained in the three different calibration rooms agreed within a reasonable deviation.
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