US 10,310,107 B1Granted

Calibration and measurement method and system for piping radioactivity contamination

AssigneeInstitute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan, R.O.C.

InventorsMing-Chen Yuan, Chin-Hsien Yeh

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Abstract

A calibration and measurement system for measuring a radioactive specific activity of an analyte pipe includes a calibration pipe, a standard radiation source, a radiation detector, a robot connected and a processing unit. The diameter of the inner wall of the calibration pipe is the same as the analyte pipe. The standard radiation source is surfaced over the inner wall of the calibration pipe and with a standard radioactive activity of a radioactive nuclide. The radiation detector is with a detection efficiency for detecting radiation. The radiation detector is for measuring the standard radioactive activity of the radioactive nuclide and a calibration net count rate thereof or measuring a radiation net count rate of the analyte pipe. The robot is connected with the radiation detector and moves in the calibration pipe or the analyte pipe. The processing unit calculates the detection efficiency and the radioactive specific activity.

Claims10

Dependent claims

A calibration and measurement method for piping radioactivity contamination, the calibration and measurement method measuring a radioactive specific activity of an analyte pipe, comprising:

providing a calibration pipe, the diameter of the inner wall of the calibration pipe being the same as the analyte pipe;
providing a standard radiation source being with a standard radioactive activity of a radioactive nuclide;
surfacing the standard radiation source over the inner wall of the calibration pipe;
providing a radiation detector and a robot, the robot connected with the radiation detector;
placing the radiation detector and the robot into the calibration pipe;
operating the radiation detector to measure the standard radioactive activity of the radioactive nuclide and a calibration net count rate thereof;
calculating a detection efficiency of the radiation detector according to the ratio of the calibration net count rate to the standard radioactive activity;
placing the radiation detector and the robot into the analyte pipe;
operating the robot to drive the radiation detector moving in the analyte pipe;
operating the radiation detector to measure a radiation net count rate of the analyte pipe;
and
calculating the radioactive specific activity of the analyte pipe with the ratio of the radiation net count rate to the detection efficiency.

9 more elements

Dependencies are inferred from the claim text.