FUNC Function
Nuclear fission phenomenon was discovered in 1938. The United States built the world's first atomic reactor in 1942. In 1954, the United States built the world's first nuclear-powered submarine. In 1957, the United States built the first experimental Atomic Power Station in Shippingport. More than 400 nuclear power plants have been built in more than 30 countries in world at the present time. In 1991, Qinshan nuclear power plant which is our country's first nuclear power plant were operated. There are more than 40 nuclear power plants under construction or proposed in China, which is mainly based on pressurized water reactors. Nuclear energy is clean energy, low consumption and low pollution which is the safety technology that both developed and developing countries strive to master and build.
The PWR(Pressurized Water Reactor) nuclear power plant is mainly composed of three parts: nuclear island (NI), conventional island (CI), and balance of plant (BOP). From the appearance point of view, the radiation shielding requirement of the nuclear island is cement external wall, other supporting facilities and conventional island such as steam turbo generator's workshop are mainly made of iron external walls similar to ordinary factories. The process of converting nuclear energy into electrical energy of a PWR nuclear power plant is divided into four steps and is implemented in four main equipments: 1. Reactor: transforming nuclear energy into thermal energy (high temperature and high pressure water as a moderator and coolant); 2. Steam Generator: The heat in the high-temperature and high-pressure water of one loop is transferred to the feed water of the second loop, so that it becomes saturated steam, where only heat exchange is performed without energy conversion; 3. Steam turbine: converts the thermal energy of saturated steam into high speed rotating mechanical energy. 4. Generator: Converts the mechanical energy from the steam turbine into electrical energy. The energy transfer process is: fission energy → thermal energy → transfer → mechanical energy → electrical energy.
The nuclear island is the mainstay of nuclear power plant. It is a collective term for nuclear reactor in the nuclear power plant containment and various systems associated with the reactor. The nuclear island mainly includes a nuclear steam supply system, a containment spray system and an auxiliary system. The main function of the nuclear island is to use nuclear fission energy to generate steam. The nuclear island plant mainly includes reactor plant (containment), nuclear fuel plant, nuclear auxiliary plant, nuclear service plant, exhaust chimney, electrical plant and emergency diesel generator plant. Nuclear island equipment includes nuclear reactor pressure vessel, steam generator, voltage stabilizer, main pipelines, main pumps, reactor internal components, control rod drive mechanisms, etc. In the nuclear power plant project, the energy region of the γ-radiation is in the range of several tens keV to several MeV. Most of γ-radiation energy is between 30 keV and 3 MeV. The reactor is a very strong source of neutrons under normal operating conditions. When the reactor is in a shutdown condition, the γ-radiation level of the containment operating hall area may increase during the refueling process.
The Integrated Special Radiation-Resistant Camera System and the Fixed Radiation-Resistant Camera System can be installed in the radiation environment of the nuclear island to allow operators to remotely and intuitively view the operation situation in the nuclear island. It provides accurate and clear video images of the operating area to improve safety production and to provide accident monitoring
The radiation-resistant camera system can be equipped with a radiation-resistant lighting system to enhance ambient illumination.
The digital video code stream is transmitted back to the control room through the radiation-resistant cable of the radiation-resistant camera system, which can be stored and managed. The images of multiple network cameras can be simultaneously viewed, browsed, played back, managed, and stored. Single screen switching, multi-screen switching, zoom±, Pan/Tilt, light on/off and other operations can be realized.
FFB Characteristic
1. The design and manufacture of products are professional, exquisite and concise which have perfect mechanical structure design, precision processing, safety and reliability.
2. There is radiation-resistant design, which can be applied to different radiant energy environments.
3. The camera system can be equipped with a white light lamp suitable for radiation environment, to ensure high quality color image effects under low illumination.
4. The cross centered mark can be synthesized on the video screen to assist the operator in positioning.
5. The special small-size radiation-resistant camera system is suitable for installation inside the shielded cylinder of spent fuel spreader, etc., to realize video surveillance of the closed blind zone;
6. In order to ensure the safety of the CCTV equipments in the nuclear island and avoid economic losses to the nuclear power plant, all camera systems are equipped with safety chains (anti-dropping), without any easy-drop structure parts. The enclosure of the camera system is not made of active material. The camera system has higher radiation resistance performance.
Topo Topological graph
