Usefulness of laboratory neutron fields

Area of Science:

• Nuclear Engineering
• Radiation Detection and Measurement

Background:

• Neutron survey meters are crucial for radiation protection in nuclear power plants.
• Accurate calibration is essential for reliable dose assessment in diverse neutron fields.

Purpose of the Study:

• To evaluate the performance of a moderator-type neutron survey meter.
• To compare measured and theoretically calculated calibration constants.
• To assess the meter's response in simulated reactor workplace neutron fields.

Main Methods:

• Testing the neutron survey meter in five laboratory neutron fields.
• Determining calibration constants and responses by measurement.
• Calculating theoretical calibration constants using a literature response function.
• Analyzing meter response against reference ambient dose equivalent values.

Main Results:

• Measured and theoretical calibration constants showed good agreement.
• The study identified the range of potential over- and under-response for the survey meter.
• Calibration constants were determined for various neutron spectra, including simulated power-plant workplaces.

Conclusions:

• The tested neutron survey meter demonstrates predictable performance across different neutron fields.
• Theoretical calculations can reliably estimate calibration constants for this type of survey meter.
• Findings provide guidance for using the survey meter effectively in nuclear power plant environments.