The utility model relates to high temperature and irradiation resistant video equipment
In the field of nuclear power in-service inspection application technology, in particular, the utility model relates to a high temperature and irradiation resistant video equipment.
During the operation and refueling overhaul of the nuclear power plant, part of the inspection environment temperature reaches more than 60℃, and the radiation dose rate is higher than 1000Gy/h. According to the relevant inspection specifications for nuclear power plant, video inspection should be carried out for the equipment in this part under high temperature and strong irradiation environment. Cracks, corrosion and other opening defects on the inspected surface should be observed in the video inspection. Therefore, it is required that the video equipment used in the high temperature and strong irradiation environment should obtain images meeting the requirements of the specification. The equipment also needs to ensure uninterrupted trouble-free operation in high temperature and strong irradiation environment, with good stability and low power consumption performance.
In order to ensure that the video inspection equipment can obtain images meeting the requirements of nuclear power plant inspection specifications under high temperature and strong irradiation environment, and ensure uninterrupted trouble-free operation. Therefore, a kind of high temperature and irradiation resistant video equipment is developed by selecting the corresponding irradiation-resistant materials and designing the corresponding structure.
The utility model relates to a high temperature and strong irradiation resistant video equipment, which comprises a visible light reflector and an irradiation shielding layer (including lead, tungsten alloy, tungsten polymer and depleted uranium). Visible light reflector comprises a mirror, adjusting support seat, lens bracket, the mirror is installed on the adjusting support seat, visible light reflector bolt is fixed at the bottom of the video equipment, lens bracket is fixed on the bottom of the adjusting support seat by bolt, the mirror is placed against the lens bracket; The constant temperature device comprises a semiconductor cooling chip, a soaking plate, a cooling fin, a cylinder body and a temperature control board with a temperature sensor; The temperature control board with a temperature sensor is installed on the top of the core barrel with good thermal conductivity, the cold side of the semiconductor refrigeration chip and the core barrel of one or four surfaces, the hot side of the semiconductor refrigeration chip and the soaking plate, the soaking plate and the heat dissipation wing are installed in the middle of the metal shell; The irradiation shield (containing lead, tungsten alloy, tungsten polymer, depleted uranium) is bolted to the housing.
The irradiation shielding layer is superimposed by a variety of materials, including lead, tungsten alloy, tungsten polymer and depleted uranium. The shielding layer is eccentric, and the shielding thickness near the fuel rod is much greater than that far away from the fuel rod. The base thickness is determined by the half-life of the shielding material. The gap between the shell and the cylinder body of the movement is filled with adiabatic insulation material to isolate the external heat conduction to the cylinder body of the movement. The shell is connected with the upper end cover by screws.