Maintenance device for radioactive source

Abstract

The invention discloses a maintenance device for a radioactive source. The maintenance device comprises a shielding box capable of shielding a neutron ray and a gamma ray, a source grabbing rod, a cleaning device, a camera shooting unit and a display unit; a through hole is formed in the top wall of the shielding box; the source grabbing rod is inserted into the through hole and used for grabbing the radioactive source and can move the radioactive source into the cleaning device and to the camera shooting unit; the cleaning device is installed in the shielding box; the camera shooting unit is installed in the shielding box; the display unit is connected with the camera shooting unit and used for outputting information shot by the camera shooting unit outside. According to the maintenance device for the radioactive source, by combining three radioactive protection elements, namely, time protection, distance protection and shielding protection, cleaning and checking of the radioactive source are better achieved through a shielding protection method according to the practical situation of the cleaning process, and the radioactive irradiation time for a human body is greatly shortened.

Description

technical field [0001] The invention relates to oil exploitation equipment technology, in particular to a maintenance device for radioactive sources. Background technique [0002] At present, radioactive logging is widely and widely used in the evaluation and measurement of formation lithology, density and porosity. This is by far the most common measurement method for formation lithology density and porosity used by various oil companies around the world. As the ray-emitting part, the radioactive source is installed in the source chamber of the instrument, and continuously decays to release gamma rays or neutron rays with specific energy and quantity. After a series of reactions with the measured formation, the released rays are then The instrument detects that there is a certain proportional relationship between the number of ray counts and the lithology density and porosity of the formation. Finally, the formation density and porosity are calculated from the count rate t...

AI Technical Summary

Problems solved by technology

For gamma rays, there is currently only lead clothing that protects against gamma rays, but because the lead metal itself is very heavy, the thickness of the lead clothing is relatively thin (otherwise the work will not be able to bear its weight), and its shielding effect is limited. , the ideal protective effect cannot be achieved during cleaning and inspection work; for neutron rays, there is currently no wearable protective device for shielding neutron rays, and the neutron protective devices on the market are very expensive. The price of the set reaches hundreds of thousands, and the clothes are very heavy, which is very inconvenient for cleaning. If the radioactive source itself is dirty, it will take more time for the staff to clean it, which means that they will be exposed to radiation for a longer period of time

[0008] 2. The inspection process is very harmful to the inspectors

Because there is no suitable device for inspection, the staff can only observe at close range by wearing lead glasses. The shielding effect of lead glasses on gamma rays is very limited, and in addition, it does not have any shielding effect on neutron rays.

[0009] 3. There is uncertainty in the cleaning effect

This makes the whole cleaning process very cumbersome, and also increases the radioactive exposure time of the staff

[0011] 5. Insufficient inspection capabilities. First, if it is difficult to load radioactive sources into storage tanks during on-site operations, there is no good enough method to determine the cause of the problem when returning to the workshop for inspection.

Second, because the cleaning and inspection work is completed by the staff at a certain distance and through naked eye observation, it is not possible to observe the radioactive source itself carefully and closely. possibility of

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