Shanghai Research Institute Environmental gamma radiation monitor research project passed acceptance

[China Instrument Network Instrument R&D] A few days ago, the AQSIQ research project "Study on Field Calibration Technology of Stationary Environmental Gamma Radiation Dose Rate Monitor" undertaken by the Shanghai Institute of Metrology and Measurement Technology held the project acceptance meeting and successfully passed the experts. Group acceptance.

The fixed environment gamma radiation dose rate monitor is an instrument fixed in the field radiation monitoring point for continuous monitoring of the environmental gamma radiation level. The accuracy of its monitoring results is related to the timely and effective early warning of nuclear accidents, the deployment of nuclear accident emergency measures and nuclear accident assessment. Effect and so on. In order to ensure the accuracy of the monitor, the instrument needs to be calibrated effectively.

The project team optimized using Monte Carlo simulation technology and successfully developed a calibration method suitable for complex field environments. The device developed by the method can temporarily emit reference radiation fields with good uniformity and low self-scattering characteristics during calibration. For calibration of fixed environmental gamma radiation dose rate monitors. The design of the device fully considered the feasibility of on-site operation, portability and operator radiation safety issues.

The successful completion of this project has effectively solved the problem that the monitor fixed in the field needs to be disassembled and sent for inspection. The continuity and stability of the monitoring are affected, and the risk of instrument damage caused by disassembling the transport is avoided. "The comprehensive technology of the project has reached the leading domestic and international advanced level" and related technologies have applied for invention patents.

(Original title: Research on on-site calibration technology for fixed-type environmental radiation gamma radiation dose rate monitor in our hospital)

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