37results about How to "Reduce the risk of exposure to radiation" patented technology

The invention discloses a control rod guide cylinder hoisting device and a control rod guide cylinder hoisting method. The control rod guide cylinder hoisting device includes a hoisting assembly for connecting with lifting equipment, a gripper actuator for picking and placing the guide cylinder, And at least one set of connecting rod assemblies connected between the suspension assembly and the gripper actuator; the gripper actuator includes a guide rod for extending into the guide cylinder, passing through the guide rod and A moving rod that can move back and forth along the axial direction of the guide rod, an umbrella-shaped support that is connected between the guide rod and the moving rod and that opens and closes with the movement of the moving rod; the umbrella-shaped support is open state, its top is used to abut against the support surface below the guide plate in the guide cylinder; when the umbrella-type support is in the closed state, it extends along the axial direction of the guide rod and fits on the guide rod superior. The invention realizes the safe, accurate and reliable hoisting operation of the control rod guide cylinder.

The invention discloses a multi-gamma photon simultaneously emitting drug time coincidence nuclear medicine imaging system and method, which belongs to the field of nuclear medicine imaging. The system comprises a plurality of detector probes arranged in a non-parallel manner, a time coincidence module and a computer platform. , each detector head is composed of a collimator and a gamma photon detector with time measurement function, detecting multiple gamma photons emitted by radionuclide within a short time constitutes a multi-gamma photon coincidence event; The method calculates the position of the point where the sum of the distances of the projection lines determined by each gamma photon event in the multi-gamma photon coincidence event is the shortest point, which is the position where the radionuclide decays, and accumulates a certain number of multi-gamma photon coincidence events. Events can achieve the acquisition of radionuclide distribution in organisms. The imaging system and method simplifies the reconstruction algorithm, improves the signal-to-noise ratio of the reconstructed image, reduces the demand for total counting of gamma photons, and reduces the radiation risk of patients.

The invention belongs to the field of nuclear waste treatment, and specifically discloses a reaction device and method for degrading radioactive waste resin based on the Fenton method. The device includes a stirring reaction module, a resin feeding module, an acidifying catalyst regulating module, a heating regulating module, a hydrogen peroxide regulating module, a reaction liquid processing module, and a reaction gas circulation module control equipment, and the control equipment is used for real-time collection of the reaction substances in the main body of the stirring tank. The temperature and pH value are used to regulate the delivery volume of the acidification catalyst regulation module, the heating regulation module and the hydrogen peroxide regulation module in real time. The method includes adding waste resin, acidification catalyst and hydrogen peroxide into the stirring reaction module according to the feeding order, and real-time regulation of the reaction temperature and pH value, and post-processing the product after the waste resin particles are oxidized and decomposed. The invention can effectively degrade the waste resin, reduce the generation of pollutants, and at the same time reduce the risk of radioactive leakage through a highly automated device.

The invention, which belongs to the technical field of the computer, discloses a method and apparatus for determining an ideal single-lifting counting rate. The method comprises: distances between unit regions in a curved surface formed by rotation of a bar source of radioactive activity in a direction parallel to an axial direction of positron emission tomography (PET) equipment at a first distance being a distance to the axis of the PET equipment and all crystals of the PET equipment as well as angles of each unit region and each crystal are determined; and according to the distances between the unit regions and the crystals and the angles of each unit region and each crystal as well as a preset ideal single-lifting counting rate algorithm, a current ideal single-lifting counting rate of each crystal is determined. Therefore, being close to a radioactive solution by a technicist for long time can be avoided and thus the risk of radiation on the technicist can be reduced; and an accident can be prevented.

The invention provides a profile gaugemeter automatic calibration device and a calibration method. The device comprises a scale frame erected above a profile gaugemeter radiation detection area, a mobile vehicle body used for carrying a standard model, and a drive mechanism having a position encoder, wherein each tick mark on the scale frame represents a position of the ionization chamber in the profile gaugemeter radiation detection area, and the mobile vehicle body can be movably disposed on the scale frame in a direction along the arrangement of the tick marks, the position encoder is connected to a central controller, and when the central controller issues an instruction to the position encoder, the drive mechanism drives the mobile vehicle body to move to the tick marks to be calibrated. The profile gaugemeter automatic calibration device and the calibration method can remotely operate the movement and positioning of the standard template, and can quickly correct the thickness compensation parameters of the respective ionization chambers of the profile gaugemeter.

The invention belongs to the technical field of nondestructive inspection of a nuclear power station, and particularly discloses an automatic welding seam scanning device for a water chamber locatingplate of a heat exchanger of a nuclear power station. The automatic welding seam scanning device comprises an installation rail and a scanning assembly arranged on the installation rail in a sliding manner, wherein the scanning assembly comprises a framework arranged on the installation rail in a sliding manner, one or more scanning rail segments rotatably connected with the framework and a scanning rail car provided with a welding seam inspection device; and the scanning rail segments are unfolded to form a scanning rail for the movement of the scanning rail car. The scanning rail of the device adopts a folded structure, and the scanning rail can be folded in the installation and disassembling process, thereby reducing the overall size; after entering the water chamber, the scanning railcan be unfolded to form a long rail, thereby widening the scanning range of the device; and the installation and disassembling of the device are performed outside the water chamber, so that personneldo not need to enter the water chamber, thereby reducing the irradiation risk of the personnel.

The invention provides a passive online rehydration device and method for a containment filtration and discharge system, which includes a plurality of rehydration tanks and rehydration pipelines. There is washing solution in the liquid replenishment tank; one end of the liquid replenishment pipeline is connected to several of the liquid replenishment tanks and the other end is connected to the Venturi water washing container, and the water washing solution in the liquid replenishment tank can be filled into the Venturi water washing container. Inside the container, rehydrate the venturi wash container. The invention improves the safety, reliability and convenience of liquid replenishment in the process of filtering and discharging, and ensures the safe operation of the filtering and discharging system under more severe conditions after serious accidents.

The invention relates to a method and system for packaging radioactive material containers in the nuclear industry. The method includes: a control system controls the moving mechanisms in the first sealed box and the second sealed box to package the container to be packaged for the first time; the control system acquires the second 2. The radiation information of the first sealed container detected by the detector in the sealed box, and confirm whether it meets the transfer-out standard; if not, control the movement mechanism in the N-1 sealed box and the N-th sealed box to align The container after the N-2th packaging is packaged for the N-1th time; and the radiation information of the container after the N-1th packaging detected by the detector in the N-th sealed box is obtained; and the N-1th packaging is confirmed. When the container meets the transfer-out standard, control the N-th sealed box to communicate with the safe transfer-out channel, and move the N-1th sealed container to the safe transfer-out channel for transfer out. The above method can effectively realize the automatic packaging of the radioactive material container and ensure the safety of the transported radioactive material.