ENVIRONMENTAL RADIOACTIVITY MEASUREMENT AND CONTROL SYSTEM AND ANALYSIS METHOD FOR RADIOACTIVITY INTENSITY

摘要

PPROBLEM TO BE SOLVED: To provide an environmental radioactivity measurement and control system, inexpensively handling measurement sample for measuring environmental radioactivity in a large quantity, and an analysis method for radioactivity intensity. PSOLUTION: In a customer's site 110 (110A, 110B, 110C, 110D), descendant nuclides of radon and thoron are scavenged in a filter, and gross measurement for α dose is made within one hour after scavenging (step S01). Subsequently, the filter with scavenging condition information, gross measurement information and extraction site information or the like is delivered to an analysis center 120 (step S02). In the analysis center 120, gross measurement for the delivered filter is again made, and radioactive nuclide is analyzed to precisely evaluate radioactive intensity (step S03). Subsequently, the quantity of radon and the quantity of thoron at the measurement sample extraction time in the site 110 are calculated (step S04), and the result of analysis on the quantity of radon and the quantity of thoron is reported to the customer (step S05). PCOPYRIGHT: (C)2009,JPO&INPIT