An apparatus for analyzing nuclides and the concentration thereof in waste contained in a radioactive waste packaging container according to the present disclosure relates to an apparatus that has detector devices located above/under the waste packaging container and performs nuclide and concentration analysis on the waste in the packaging container by scanning the packaging container in the longitudinal direction thereof using a forward/backward driving device. In particular, upper/lower detector modules are equipped with multiple high-resolution gamma ray detectors to increase inspection efficiency, each module is designed to be driven up/down, and each detector in the module is designed to be driven left/right, thereby performing nuclide and concentration analysis on various types of packaging containers regardless of the size thereof.

An apparatus for analyzing nuclides and the concentration thereof in waste contained in a radioactive waste packaging container according to the present disclosure relates to an apparatus that has detector devices located above/under the waste packaging container and performs nuclide and concentration analysis on the waste in the packaging container by scanning the packaging container in the longitudinal direction thereof using a forward/backward driving device. In particular, upper/lower detector modules are equipped with multiple high-resolution gamma ray detectors to increase inspection efficiency, each module is designed to be driven up/down, and each detector in the module is designed to be driven left/right, thereby performing nuclide and concentration analysis on various types of packaging containers regardless of the size thereof.

The invention relates to an alpha radiation detector (1) for measuring the radon concentration in the ambient air, comprising a housing (10) having a base (5) on which a hood (2) is arranged, which hood has a chamber (9) which is located therein, wherein the opaque housing (10) is designed in such a way that ambient air can penetrate into the chamber (9) from the outside, the alpha radiation detector further comprising an optical sensor (4). According to the invention, the hood (2) has an inner wall which is provided at least in part with a scintillation material (3) which generates light pulses (8) upon impingement of alpha particles (7), which light pulses are sensed by the optical sensor (4).

The present invention provides a method for determining a background count rate in liquid scintillation counting. The method comprises measuring an external standard spectrum (201, 202) of a sample, determining, from the external standard spectrum, an external standard count rate within an energy window (203), determining, based on the external standard count rate within the energy window, a background reference parameter, and determining, based on the background reference parameter, the background count rate from a background reference curve (301).

The present invention provides a method for determining a background count rate in liquid scintillation counting. The method comprises measuring an external standard spectrum (201, 202) of a sample, determining, from the external standard spectrum, an external standard count rate within an energy window (203), determining, based on the external standard count rate within the energy window, a background reference parameter, and determining, based on the background reference parameter, the background count rate from a background reference curve (301).

A capsule composition comprising: (a) a polyester shell having a thickness of no more than 20 microns, and (b) a solution containing a visual and/or olfactory indicator, wherein the solution is encapsulated by the polyester shell. Also described herein is a method for detecting alpha particle radiation, in which: (i) the capsule composition is placed in contact with an esterase in a location where the presence of alpha particle radiation is being determined; (ii) waiting a period of time for the esterase to degrade the polyester shells, wherein the period of time is insufficient for the esterase to cause leakage of the solution in the absence of alpha particle radiation but is sufficient for alpha particle radiation, if present, to cause leakage from the capsule composition; and (iii) observing whether leakage has occurred at the end of the period of time to determine whether alpha particle radiation is present.

A wearable radon detector is an apparatus that measures radon exposure around a user. The apparatus includes a housing, an elongated plate, and a radon-detecting foil strip. The housing contains the elongated plate and the radon-detecting foil strip. The elongated plate positions and maneuvers the radon-detecting foil strip. The housing includes a receptacle portion, a storage portion, a first breakaway line, a plate-receiving slot, and a plurality of air passages. The elongated plate includes a grasping member, a setting member, and a second breakaway line. Radon collects within the receptacle portion through the plurality of air passages. The storage portion shields the radon-detecting foil strip once setting member has been slid from the receptacle portion and into the storage portion, the receptacle portion has been separated from storage portion along the first breakaway line, and the grasping member has been separated from the setting member along the second breakaway line.

A wearable radon detector is an apparatus that measures radon exposure around a user. The apparatus includes a housing, an elongated plate, and a radon-detecting foil strip. The housing contains the elongated plate and the radon-detecting foil strip. The elongated plate positions and maneuvers the radon-detecting foil strip. The housing includes a receptacle portion, a storage portion, a first breakaway line, a plate-receiving slot, and a plurality of air passages. The elongated plate includes a grasping member, a setting member, and a second breakaway line. Radon collects within the receptacle portion through the plurality of air passages. The storage portion shields the radon-detecting foil strip once setting member has been slid from the receptacle portion and into the storage portion, the receptacle portion has been separated from storage portion along the first breakaway line, and the grasping member has been separated from the setting member along the second breakaway line.

A billing system based on radon concentration pattern analysis and a method therefor is provided, the system including a radon detection device counting the output alpha particle detection signals for a predetermined measurement time to calculate a radon concentration value; and a cloud server storing generating a radon concentration pattern corresponding to the radon detection device by using a radon concentration value received from the radon detection device and calculating a cost for radon monitoring service provided to a terminal of the user, wherein the cloud server analyzes the generated radon concentration pattern and determines the periodic behavior pattern of the user for a predetermined period of time, whereby it is possible to charge a radon monitoring service fee for each user using the radon monitoring service, and the user may be motivated to frequently perform the ventilation action that reduces the radon concentration.

A billing system based on radon concentration pattern analysis and a method therefor is provided, the system including a radon detection device counting the output alpha particle detection signals for a predetermined measurement time to calculate a radon concentration value; and a cloud server storing generating a radon concentration pattern corresponding to the radon detection device by using a radon concentration value received from the radon detection device and calculating a cost for radon monitoring service provided to a terminal of the user, wherein the cloud server analyzes the generated radon concentration pattern and determines the periodic behavior pattern of the user for a predetermined period of time, whereby it is possible to charge a radon monitoring service fee for each user using the radon monitoring service, and the user may be motivated to frequently perform the ventilation action that reduces the radon concentration.