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KMID : 0364920090340020077
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Journal of Radiation Protection and Research
2009 Volume.34 No. 2 p.77 ~ p.81
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A LONG-TERM FIELD TEST OF A LARGE VOLUME IONIZATION CHAMBER BASED AREA RADIATION MONITORING SYSTEM DEVELOPED AT KAERI
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Kim Han-Soo
Ha Jang-Ho
Park Se-Hwan
Kim Jung-Bok
Kim Young-Kyun
Jin Hyung-Ho
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Abstract
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An Area Radiation Monitoring System (ARMS) ionization chamber, which had an 11.8 L active volume, was fabricated and performance-tested at KAERI. Low leakage currents, linearities at low and high dose rates were achieved from performance tests. The correlation coefficients between the ionization currents and the dose rates are 1 at high dose rate and 0.99 at low dose rate. In this study, an integration-type ARMS ionization chamber was tested over a year for an evaluation of its long-term stability at a radioisotope (RI) repository of the Young-gwang nuclear power plant. The standard deviation of dose rate of 1 day data and over a 100-days mean value were 6.2 R/h and 2.9 R/h, respectively. The fabricated ARMS ionization chamber showed stable performance from the results of the long-term tests. Design and performance characteristics of the fabricated ionization chamber for the ARMS from performance-tests are also addressed.
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KEYWORD
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ARMS (Area Radiation Monitoring System), Ionization Chamber, Long-term Stability, Linearity, Nuclear Power Plant
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