Does anyone know what the maximum nuclear pressure of a nuclear reactor is?

Hello, different nuclear reactors have different pressures. Among the reactors currently used in nuclear power plants, pressurized water reactors are the most competitive reactor type (accounting for about 61%), boiling water reactors account for a certain proportion (accounting for about 24%), and gas reactors heavy water are used. less frequently (representing approximately 5%). The main characteristics of a pressurized water reactor are: 1) the use of cheap and everywhere ordinary water as moderator and heat carrier 2) in order to maintain the cooling water at very high temperature in the reactor at In liquid state, the reactor operates under high pressure (water pressure) (about 15.5 MPa), it is called a pressurized water reactor 3) Since the water in the reactor is at liquid state, the steam to drive the turbogenerator must be generated outside the reactorr ; this is achieved using a steam generator, coming from the reactor. Cooling water, i.e. primary circuit water, flows through one side of the steam generator heat transfer tube and transfers heat to the secondary circuit water on the other side heat. transfer tube, transforming the latter into steam (the steam pressure of the secondary circuit is 6-7 MPa, the steam temperature is 275-290 ℃ 4) Since ordinary water is used as a moderator and coolant , the thermal neutron absorption cross section; is large, so it is impossible to use natural uranium as nuclear fuel, and enriched uranium must be used (the content of uranium 235 (2-4%) as nuclear fuel. Boiling water reactors and pressurized water reactors are both light water reactors, like pressurized water reactors they also use ordinary waterre as a moderator and coolant. The difference is that steam (the pressure is about 7 MPa) is generated in the boiling water reactor and directly when. using a gas turbine to produce electricity, there is no need for a steam generator and there is no distinction between primary and secondary circuits. The system is very simple and the operating pressure is lower than that of a pressurized water reactor. However, the steam in a boiling water reactor is radioactive and protective measures are necessary to prevent radioactive leaks. Heavy water reactors use heavy water as a moderator and coolant. Because its thermal neutron absorption cross section is much smaller than that of ordinary water, natural uranium can be used as a nuclear fuel in heavy water reactors. So-called thermal neutrons refer to rapid neutronses emitted during the fission of atomic nuclei of uranium 235, which were slowed down to a speed of 2,200 m/s and have an energy of approximately 1/40 eV. The possibility of thermal neutrons causing nuclear fission of uranium-235 is 190 times greater than the possibility of being captured by a uranium-238 nucleus. In this way, in a heavy water reactor using uranium natural as a fuel, the nuclear fission chain reaction can continue to unfold. Because heavy water moderates neutrons less effectively than regular water, the core of a heavy water reactor is much larger than that of a light water reactor, making it difficult to fabricate vessels under pressure. The heavy water reactor still needs to be equipped with a steam generator. The heavy water in the primary circuit brings heat to the steam generator and transmits it to the ordinary water in the secondary circuit to generate steam. The biggest hasadvantage of the heavy water reactor is that it does not need to enrich uranium but uses natural uranium as nuclear fuel. However, one of the important reasons hindering its development is that heavy water is difficult to obtain, because heavy water only represents nuclear fuel. 1/6500 natural water.