Separation of Natural Background by using Correlation of Time-series Data on Radiation Monitoring

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概要

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• Increase of dose rate due to rainfall often becomes an interfering factor for radiation monitoring outdoors. However, the nature of this interference is different at each place. We obtained a good correlation of dose rate between monitoring points by analysis of 10 minutes-series data of rainy days. The regression line formula for each point was derived from the relation of its dose rate with that of a basis point selected from among the monitoring points. Dose rate drifting due to rain at one point could be reconstructed from this formula and the measured value of the basis point. The estimated dose differed from the measured data by less than 1.2 nSv/10 min. In addition, a simulation was conducted by which virtual doses from the facility were added to actual measured values at each point. By applying the method in this study, virtual doses were calculated within 10% error when they were larger than 33 nSv. This procedure of dose evaluation can be applied to outdoor radiation monitoring if there are several radiation monitors in a site.

• 一般社団法人 日本原子力学会の論文
• 2003-01-25

著者

• Miyake H

  National Institute For Fusion Science

• Miyake Hitoshi

  National Institute For Fusion Science

• YAMANISHI Hirokuni

  National Institute for Fusion Science

関連論文

• Development of Tritium Cleanup System for LHD using Nonvolatile Getter Materials
• Separation of Natural Background by using Correlation of Time-series Data on Radiation Monitoring
• Improved Data Acquisition Methods for Uninterrupted Signal Monitoring and Ultra-Fast Plasma Diagnostics in LHD
• Study on the Calibration of LHD Neutron Monitoring System
• Activation Analysis for LHD Experiments with Deuterium Gases

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