| 摘要 |
PURPOSE: To accurately monitor fuel which has been spent while reducing the amount of work by achieving a simultaneous sampling by a plurality of fuel storage pipes where the amount of sampling gas of each fuel storage pipe is equal and the gases of the fuel storage pipes do not mix. CONSTITUTION: A sampling pipe 10 is connected by a fuel storage pipe 4 and is connected to another sampling pipe 10 via valves 9 and 8 where the capacity of the pipes in-between is fixed to form one pipe and then is connected to a radioactive ray detector 11 and an exhaust pump 12. With a sampling method, only the valve 9 is closed for a plurality of storage pipes and the inside of the sampling pipe is evacuated, the valve 8 is closed and the valve 9 is opened and a sampling gas is stored between the valves 8 and 9, the valve 9 is closed and the valve 8 is opened, and gas is collected and is inspected by a radioactive ray detector 11.
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