The thermoelectric efficiency of nuclear energy is very low. Daya Bay, which has an electrical efficiency of 986 MW, has a thermal efficiency of almost 3,000 MW, less than a third. The highest thermoelectric efficiency is that of the ultra-supercritical thermal power plant, because the steam parameters are much higher than those of nuclear power (nuclear does not dare to increase the steam parameters for safety reasons). If we only talk about energy efficiency, the highest is the combined heat and power unit, because all the exhaust steam from the steam turbine is used for heating and there is no waste of waste heat. Efficiency of electricity production per unit of fuel mass does not appear to exist in the electric power industry. Comparisons are based on coal consumption, and coal cannot be compared to nuclear fuelarea. For example: Daya Bay Nuclear Power Plant Unit 1 has a total power generation capacity of 984 MW, the corresponding reactor thermal power is 2,905 MW, and the converted thermal efficiency is 33.87%. Pressurized water reactor nuclear power plants may have the lowest thermal efficiency among nuclear power plants; while high-temperature gas-cooled reactors can achieve an efficiency close to that of subcritical thermal power plants, but are still lower than the current efficiency. popular conventional thermal power plants.
The volume of 130 tons of nuclear wastewater is equivalent to 43 million 3-meter floors, which is equivalent to a small city.
The volume of a standard swimming pool is 50 cubic meters (or 50,000 liters), and 130 tons of water is equivalent to the water volume of 26,000 standard swimming pools; per day is 2 liters, then the quantityof 1.3 million tonnes of water will be enough for all of Japan (126 million inhabitants) to drink for five days. 130 tons of nuclear wastewater has a volume equivalent to 43 million floors of 3 meters, which is equivalent to a small city.
What's even more frightening is that it is reported that nuclear-contaminated water from Fukushima continues to increase at a rate of 170 tons per day, which is equivalent to the daily drinking water for 85,000 people and the volume of water. of 3.4 swimming pools to standards. Once such a large amount of water contaminated with nuclear substances is released into the sea, the radioactive materials contained in it will inevitably destroy the ecological environment of the world ocean.
Why does Japan have so much nuclear wastewater?
The 2011 Tohoku earthquake in Japan caused damage with a magnitude of 9.0, the largest in Japanese history. The most powerful earthquake ever. This earthquake not only caused the crust to rupture in Japanese cities, but also caused a large-scale tsunami and led to a series of secondary disasters. The Fukushima Daiichi Nuclear Power Plant, located in Fukushima Prefecture, Japan, is one of the Japanese buildings damaged by secondary earthquake disasters.
Rising seawater destroyed the power supply and cooling system at the Fukushima nuclear power plant. Without the cooling system, the Fukushima nuclear power plant is like an oven whose temperature only increases but does not decrease. the path to subsequent leaks in nuclear power plants. Eventually, Fukushima Units 1, 3, and 4 exploded due to increased atmospheric pressure. Not only were the facilities around the plant severely damaged,but radioactive gases also began to escape. In order to avoid public pressure, Japan's Tokyo Electric Power Company purchased a large number of storage tanks to store nuclear wastewater.