Uniform inner heat source simulator of medical isotope production solution reactor

Abstract

The invention relates to a reactor simulator, in particular to a uniform inner heat source simulator of a medical isotope production solution reactor, comprising a power simulation part and a fissiongas simulation part, wherein the power simulation part comprises a heating component and a heat exchange component, and the fission gas simulation part comprises a bubble generation device and simulation gas. The invention really reflects power distribution of fuel solution in the reactor, efficiently simulates power distribution of a prototype reactor, strictly controls occupied flow area of an electric heating element without causing great influence on natural convection heat exchange of the solution by the electric heating element, solves the problems of high simulation power and small cross section of the electric heating element in the prior art and satisfies the experimental requirements. In addition, nitrogen gas is used as the simulation gas so that the safety of an experiment is ensured.

Description

technical field [0001] The invention belongs to a reactor simulation device, in particular to a medical isotope production solution reactor uniform internal heat source simulation device. Background technique [0002] Currently, due to 99 Mo, 131 I and 89 Sr and other medical radionuclides and pharmaceuticals have great application value and broad market prospects. Many countries, such as the United States, Russia, and Mexico, are actively developing medical isotope production reactor (Medical Isotope Production Reactor, MIPR) technology. So far, most MIPRs with a design power below 50kW have been built, but there is no MIPR with a design power up to 200kW. The overall heat transfer capability of the MIPR core is the key technology in the design and construction of MIPR, and an important content of nuclear safety analysis. For the 200kW "water boiler" type MIPR, the nuclear fission material is not a solid, but a uniform solution, and the heat generated by the fission of ...

AI Technical Summary

Problems solved by technology

[0005] (1) Existing technologies such as using infrared, magnetic induction heating and other heating methods for experimental simulation can effectively ensure the uniformity of heating of the fuel solution, but cannot simulate the power distribution of the fuel solution in a real reactor, which will inevitably cause the experimental results to be inconsistent with the real situation of the prototype large discrepancies between

[0006](2) Use scattered electric heating elements as heat source units, and set them according to the power distribution of the prototype; the advantage of this simulation method is that it can effectively simulate the power of the prototype distribution, but the electric heating element will affect the natural convection heat transfer between the fuel solution and the cooling coil after being placed in the core vessel; therefore, the flow area occupied by the electric heating element must be strictly controlled; and only the cross-sectional area of ​​all electric heating elements When the sum is less than 3% of the entire flow area, the electric heating element will not have a great impact on the natural convection heat transfer of the solution, and the reliability of the experimental results can be guaranteed, which is difficult to achieve in the existing technology;

[0007] (3) Since the simulated power of this experiment is as high as 200kW, and the cross-sectional area of ​​the electric heating element cannot be greater than 3% of the entire flow area, the filling of the resistance wire diameter of the electric heating element itself and the insulating material magnesium oxide powder in the prior art and other processes are difficult to meet the requirements;

[0008] (4) In the simulation process of the disturbance effect of the hydrogen and oxygen gas produced by nuclear irradiation on the natural convection heat transfer of the solution, if the hydrogen and oxygen consistent with the prototype are used , may explode, which makes the safety of the experiment impossible to be guaranteed; it is necessary to find the right gas to simulate the occurrence of bubbles, which is difficult to achieve with the existing technology

Images