DEVICE FOR MEASUREMENT OF RADON IN THE UNDERGROUND WATER BY MEANS OF IN-LINE SAMPLING

摘要

PURPOSE: An in-line underground water sample collecting device for measuring radon concentration is provided to minimize errors caused by a difference of a leaked amount of the radon emitted from a underground water surface or a container to the air. CONSTITUTION: An in-line underground water sample collecting device for measuring radon concentration comprises a ring or a net, a sample inlet, and an air outlet. The ring or the net is arranged on the top of the device to mount a time integration type measuring device. The sample inlet and the air outlet are formed on the lateral surface of the device. [Reference numerals] (AA) Air discharge port; (BB) Opening and closing unit; (CC) Alpha track; (DD) Sample inlet;