Miniaturized mobile solid and liquid radioactive activity detection device and detection method

Abstract

The invention discloses a small-size movable-type solid and liquid material radioactive activity detection device and method, and the device comprises a case, a measurement chamber fixed in the case, a display screen disposed on the surface of the case, and a measurement circuit disposed in the case. The measurement chamber and the display screen are arranged to be parallel to each other. The display screen is connected with the measurement circuit. The measurement chamber comprises a tungsten alloy cover, a tungsten alloy shielding tank body, a sample cup, and a probe. The tungsten alloy cover is divided into a left cover and a right cover, wherein one end of the left cover and one end of the right cover are in movable connection, and the other end of the left cover and the other end of the right cover are movable rotating opening end. The measurement circuit comprises a high-voltage power supply, a current amplification and forming circuit, a voltage discriminator, a counter circuit, a processor circuit, a multi-way adjustable voltage reference circuit, a key, and a display circuit. The device employs an integrated flat structure design, is small in size, is low in center of gravity, is convenient and safe for opening, is placed stably, cannot be turned at a side, employs a waterproof design for the sample cup, and can be suitable for vehicles and ships.

Description

technical field [0001] The invention relates to the technical field of radioactive substance detection, in particular to a miniaturized mobile radioactive activity detection device in solid and liquid substances and a detection method thereof. Background technique [0002] With the development of nuclear technology, nuclear energy is widely used in various industries of military and national economy. While benefiting mankind, nuclear energy also poses a great threat to human health. Once a nuclear accident or nuclear explosion occurs, a large amount of radioactive substances will be released, forming radioactive fallout, polluting the surrounding environment, and directly endangering the safety of food, meat, vegetables, fruits, drinking water, milk, beverages, etc. Therefore, how to quickly, conveniently, and efficiently detect the radioactive activity in the substance to be tested on site, and accurately evaluate the safety of radioactive pollution is an urgent problem to ...

AI Technical Summary

Problems solved by technology

However, this type of measurement method needs to use large-scale instruments and equipment in the laboratory, such as high-purity germanium gamma energy spectrum analysis system; low local α, β measurement device to achieve, the detection instrument is heavy, and the shielded lead chamber used weighs several One hundred kilograms, complex sample preparation, long analysis period, high equipment cost, unable to solve the problem of radioactivity detection in the substances to be tested at the nuclear pollution site

[0004] Although portable water and food radioactivity detectors can be used at nuclear pollution sites, because of their straight structure, the handle and cover are at the top, and the sample detection room uses lead metal as a shield in the upper part, and the lower part is photoelectric. Multiplier tube and circuit system; the structure with a heavy top and a light bottom is very unstable, and the center of gravity of the whole device is unstable and easy to rollover, which cannot be applied to sports carrier platforms such as cars and boats, and the handle and cover are very heavy, and it is very difficult for inspection personnel to pick them up. inconvenient, dangerous

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