155 results about "Burnup" patented technology

The invention provides a pressurized water reactor core axial power offset phenomenon prediction method and electronic equipment. The prediction method comprises the following steps: firstly, constructing a prediction model of the axial power offset phenomenon of the reactor core; wherein the prediction model is used for representing a model that the axial power offset phenomenon of the reactor core changes along with oxidation corrosion sediment CRUD and fuel burn-up on the surface of a cladding, and the prediction model comprises a neutron physical module, a thermal hydraulic module and a CRUD material module which have a coupling relationship; and then, carrying out coupling calculation on the prediction model within a preset duration, and generating prediction information of the axial power offset phenomenon of the reactor core. According to the prediction mode, the reactor core axial power offset phenomenon changing along with fuel burnup and CRUD deposition in the operation process of the pressurized water reactor is described, and therefore the prediction precision of the reactor core axial power offset phenomenon is improved.

The application relates to a neutron absorption material and application thereof to a control rod for a nuclear reactor core. The neutron absorption material provided by the application is prepared by mixing ytterbium elements and holmium elements in a certain proportion, can effectively play the high neutron capture cross-section characteristics of the ytterbium elements and the holmium elements, effectively absorb thermal neutrons, and can ensure good chemical and thermal stability, so that the neutron absorption material can maintain its structure and performance stability for a long time in a high irradiation environment, effectively avoids the conversion of the neutron absorption material into a weak neutron absorption material after absorbing neutrons, and further controls the neutron absorption characteristics of the neutron absorption material. Further, the neutron absorption material provided by the application can still ensure the neutron absorption characteristics thereof and maintain the reactivity value under high burnup depth, so as to prolong the service life of the control rod for the nuclear reactor core.

The application discloses a method for selecting blast furnace charging grade, comprising the following steps: (1) fitting the relationship between blast furnace charging grade and ore consumption and fuel consumption; fitting the relationship between iron ore grade and price; (2) determining the proportion of furnace burden structure, the grade and price of pellet and lump ore, the ratio of coal, and the price of pulverized coal and coke; (3) based on the set blast furnace charging grade, calculating the grade of sinter, and the corresponding grade of mixed ore, calculating the price of mixed ore according to the relationship between iron ore grade and price, and then calculating the price of sinter; (4) calculating the ore consumption and fuel consumption according to the relationship between blast furnace charging grade and ore consumption and fuel consumption, and calculating the molten iron cost corresponding to the current blast furnace charging grade; (5) changing the blast furnace charging grade, executing steps (3)-(5), until the blast furnace charging grade TFe corresponding to the lowest molten iron cost T is found in the limited blast furnace charging grade change range, which is the optimal blast furnace charging grade.

The application discloses a kind of determination methods and program products of core reactivity state, the method includes: the key state parameter in the process of core reaction is collected, key state parameter includes at least one of core power distribution parameter, coolant temperature, coolant density, control rod position, boric acid concentration and burnup;Determine the burnup step of fuel, the evolution process of fissile nuclide and fission product in core is modeled based on the burnup step of fuel and burnup model, to obtain the reactivity parameter related to the burnup of fuel, the burnup model is used to describe the nuclide transmutation and consumption logic of fuel during the operation of core;Corresponding digital twin is constructed with the reactivity state of the core, the reactivity state of the core is mapped by the digital twin based on the reactivity parameter and the key state parameter driving, can realize high-precision, real-time, full life cycle dynamic digital mapping and intelligent detection of core reactivity state.

The application provides an oxygen concentration interval checking method, and relates to the technical field of lead-bismuth fast reactor oxygen concentration interval checking, and the method comprises the following steps: establishing a lead-bismuth fast reactor model, obtaining an initial oxygen concentration interval of the lead-bismuth fast reactor model, and selecting a plurality of preset oxygen concentrations from the initial oxygen concentration interval; performing physical field calculation on the fuel rod under each preset oxygen concentration to obtain physical field parameters corresponding to each preset oxygen concentration; the physical field parameters comprise temperature distribution parameters, fuel rod geometric parameters, contact stress, cladding oxidation corrosion parameters and fission gas parameters; judging whether each preset oxygen concentration meets the use requirements of the fuel rod based on the physical field parameters corresponding to each preset oxygen concentration, and determining a qualified oxygen concentration interval based on each preset oxygen concentration that meets the use requirements of the fuel rod. The qualified oxygen concentration interval is obtained by checking the initial oxygen concentration interval, and the problems of heat transfer deterioration, inability to inhibit corrosion and inability to meet the long-term use requirements of the fuel rod during fuel rod burnup can be avoided.

The invention discloses a sensitivity coefficient calculation and fitting method for a self-powered neutron detector of a nuclear reactor, which comprises the following steps of: 1, performing component calculation under different burn-up depths and working condition parameter conditions by using a nuclear reactor component program to obtain neutron flux density and fuel component linear power density at the self-powered neutron detector under corresponding conditions; secondly, current signals generated by the self-powered neutron detector under different working condition parameters are calculated through a Monte Carlo program; thirdly, the relation between the linear power density of the fuel assembly and a current signal generated by the self-powered neutron detector is established, and the sensitivity coefficient of the self-powered neutron detector is obtained; fourthly, performing function fitting on the sensitivity coefficient of the self-powered neutron detector with respect to the burn-up depth and the working condition parameters to obtain a fitting coefficient; according to the method, the mapping relation between the current signal of the self-powered neutron detector of the nuclear reactor and the linear power density of the fuel assembly is effectively established, and key technical support is provided for online monitoring of the nuclear reactor.

The application provides a yield optimization method, system and medium for isotope irradiation production in a research reactor, and relates to the technical field of nuclear research reactors. The yield optimization method comprises the following steps: obtaining design data of the research reactor, irradiation hole usage data range and total required number of at least one type of isotope target; constructing a research reactor Monte Carlo model associated with the research reactor according to the design data; determining a flux influence factor and a multi-group microscopic cross section corresponding to the at least one type of isotope target, and a target-free neutron flux field function according to the research reactor Monte Carlo model; and taking, as a yield optimization result, layout data of each irradiation hole corresponding to a preset isotope yield target through burnup calculation according to the irradiation hole usage data range, the total required number of irradiation holes, the flux influence factor and the multi-group microscopic cross section corresponding to the at least one type of isotope target, and the target-free neutron flux field function.

The present invention discloses a burnup tracking calculation method, system and medium for multi-cycle fuel management; it relates to the technical field of reactor burnup calculation; after the first-cycle core modeling, geometric grid division is performed on each burnup zone unit in the full-core model. During the cycle of the full-core model, the replacement of all reactor internal components in the full-core model is achieved by exchanging the positions of the corresponding spatial numbers in the repeated geometric grid. Combining with the multi-cycle burnup tracking calculation process, the dynamic changes of fuel burnup, control rods and beryllium followers during reactor operation and their coupling relationship with the particle transport process are accurately considered, and the simulation of the actual refueling process of the research reactor based on the Monte Carlo method is completed, realizing high-precision and high-efficiency core calculation and analysis for high-flux research reactors, and providing theoretical support for aspects such as high-quality testing of nuclear fuels and materials, optimization of core loading and irradiation resources of research reactors, and improvement of the operation safety of research reactor reactors.

To solve such a problem that fuel balls are blocked when a fuel element runs in a dust and chipping environment is not fully considered.SOLUTION: A pressure-bearing unit comprises a pressure-bearing box body and an end flange, an allocation space is formed in the pressure-bearing box body, and the end flange is connected to the opening side of the pressure-bearing box body; a rotor unit comprises a rotating shaft, a material taking disc and a material distributing disc, and the material taking disc and the material distributing disc are connected to the rotating shaft in a sleeving mode and installed in the allocation space; a bush unit comprises a first bush and a second bush, and the first bush and the second bush are connected to the material taking disc and the material distributing disc in a sleeving mode. A non-return unit is sleeved on the rotating shaft and is connected with the end flange; the bearing assembly comprises a first bearing and a second bearing, and the first bearing and the second bearing are arranged in the end flange and the pressure bearing box body; a driving unit comprises a servo motor, a speed reducer, a coupler and a magnetic synchronizer which are connected in sequence.SELECTED DRAWING: Figure 1

The invention discloses a conveyor belt type fuel ball transmission system and method for a high-temperature gas cooled reactor, a bottom outlet of a reactor core is communicated with an inlet of a broken ball separation device, a broken ball outlet of the broken ball separation device is communicated with a broken ball storage tank, a complete fuel ball outlet of the broken ball separation device is communicated with an inlet of a burn-up measurement device, and the burn-up measurement device is communicated with an outlet of the reactor core. A spent fuel outlet of the burnup measuring device is communicated with the spent fuel storage tank, a recycled fuel outlet of the burnup measuring device is communicated with an inlet of the discharging pipe, a plurality of conveying belts are arranged on the conveying pipeline, and when any conveying belt moves to the lowest position of the conveying pipeline, an outlet of the discharging pipe directly faces the conveying belt; and when any conveying belt moves to the top of the conveying pipeline, the conveying belt is over against the charging opening of the reactor core, and the system is high in operation stability.

The invention relates to the technical field of nuclear reactors, and provides a high-temperature gas cooled reactor system. The system comprises: a reactor; the combined converter is connected to an inlet of the reactor; the burnup measuring device is connected to an outlet of the reactor; the sipping analysis device is connected between the burnup measuring device and the combined converter, a detection cavity is formed in the sipping analysis device, and the sipping analysis device is used for receiving the fuel balls from the burnup measuring device and can establish a negative pressure environment in the detection cavity so as to detect the activity value of target radionuclide in the gas in the detection cavity; the control module is electrically connected with the combined converter, the burn-up measuring device and the sipping analysis device; when the burnup value is smaller than a set burnup threshold value and the activity value is smaller than an activity constraint value, the control module controls the combined converter to return the fuel balls to the reactor for recycling; when the burnup value is larger than or equal to a set burnup threshold value or the activity value is larger than or equal to an activity constraint value, the control module controls the combined converter to unload the fuel balls.

Some embodiments of the invention disclose a modeling method for a fission gas swelling behavior of UO2 fuel under a high-burn-up condition, and the rule of irradiation swelling caused by irradiation bubbles in a high-burn-up structure in the UO2 fuel is accurately determined by coupling grain refinement and bubble evolution. The method comprises the steps of constructing a total free energy density function; based on a recrystallization grain nucleation theory, establishing a grain refinement nucleation model; based on an Allen-Cahn equation, a phase field dynamics evolution equation of high-burn-up structure evolution is constructed; solving a total free energy density function and a phase field dynamics evolution equation, and carrying out visualization processing on a numerical solution; and based on the final morphology of the high-burnup structure obtained after visualization processing, determining the effective thermal conductivity, porosity and grain size in the high-burnup structure in the UO2 fuel, and determining the rule of irradiation swelling caused by irradiation bubbles in the high-burnup structure in the UO2 fuel.

A multi-physics coupling system and method for a microreactor includes: a neutron physics simulation module, a thermal-hydraulic simulation module, a power conversion module, a main function module, a burnup nuclide update module, and a control drum position update module. The present invention dynamically adjusts the position of the control drum via the control drum position update module during the burnup coupling calculation process. In conventional multi-physics coupling methods, the position of the control drum is fixed, so the effective proliferation factor of the core is always greater than 1.0, and the results of the coupling calculation cannot reflect the actual state of the reactor during operation. When the multi-physics coupling method of the present invention is used for calculation, by continuously adjusting the control drum position, the effective proliferation factor of the reactor is always near 1.0, which is closer to the operating conditions of a real reactor and can more accurately simulate the state of the reactor.

The invention belongs to the technical field of nuclear reactor physics, and particularly relates to a fast and fine burnup calculation method for dispersive fuel based on reaction rate equivalence. Comprising the following steps: step 1, merging multi-group parameters; step 2, equivalently homogenizing the region; step 3, calculating burnup; and step 4, restarting calculation. The dispersion type fuel burn-up calculation method based on the reaction rate equivalence has the advantages that the efficiency of dispersion type fuel burn-up calculation is remarkably improved, meanwhile, high calculation precision is kept, and burn-up information of all layers in fuel particles is kept. The method provides an efficient and accurate calculation tool for design and safety analysis of the dispersion type fuel assembly.

The present invention discloses a low-temperature steel electrode for the base material SA-350Gr.LF3 of a high-burnup spent fuel storage and transportation container and a preparation method thereof. The electrode is obtained by wrapping a welding core with a powder. The composition of the powder is as follows in parts by weight: 4.5-10 parts of electrolytic manganese, 1-5 parts of titanium-boron alloy, 3-12 parts of sodium fluoride, 6-12 parts of nickel powder, 15-30 parts of calcium fluoride, 4-10 parts of silica fume, 10-15 parts of iron powder, 1-2.5 parts of silicon-zirconium alloy, and 15-35 parts of marble. The composition of the welding core is as follows in weight percentage: 0.02%-0.2% of carbon, 0.1%-0.4% of manganese, 0.01%-0.03% of silicon, 99.5%-99.9% of iron, and the balance is inevitable impurities. The electrode of the present invention has good welding process, and the mechanical properties, impact properties and crack resistance of the weld are good.

A fuel design for high burnup in water-cooled reactors is disclosed. A nuclear fuel rod comprising an outer zone of annular fuel pellets composed of actinides and fissile material and an interior comprising a low density, high open porosity ceramic foam of zirconia or magnesia is used. Use of annular pellets lowers fuel temperature, reduces fission gas release and fuel swelling. Foam with low crushing strength is used to accommodate fuel swelling. Fresh fuel reactivity is controlled by burnable absorbers such as gadolinia, incorporated as sintered bodies within the foam or as part of the fuel composition or both. The placement of burnable absorber in the foam reduces the contact area with surrounding media, mitigating diffusional transport and preserving its self-shielding characteristic. A novel two-piece foam holder is proposed to insert the ceramic foam.

This invention discloses a U-shaped neutron detection device for detecting the burn-up depth of spent fuel, belonging to the field of non-destructive testing technology for high-level radioactive spent fuel. It includes: two opposing arm detection components; a back detection component; each arm detection component includes: a moderator material; multiple arm He-3 counters spaced apart within the moderator material; a gamma shield disposed on the outer wall of the moderator material; and a cadmium sheet disposed on the outer wall of the other side of the moderator material; the back detection component includes: a support material, with both ends of the support material fixedly connected to the ends of the two moderator materials; multiple back He-3 counters spaced apart within the support material; a base plate disposed on the outer wall of the support material; and a cable connection assembly disposed on the side of the base plate away from the spent fuel component to be measured. This invention provides dual protection for the measurement of spent fuel burn-up depth by utilizing fission neutron information and transmitted neutron information, meeting the requirements for online detection.

The application discloses a fusion reactor liquid blanket tritium breeding rate online regulation system simulation method and device, wherein the simulation device comprises a fusion blanket neutron transport module, a blanket breeding agent Monte Carlo-activation coupling burnup simulation module, a blanket coolant feeding module, a blanket tritium extraction module, a blanket coolant purification treatment module, a blanket tritium breeding rate calculation module and a blanket tritium breeding agent circulation system; the simulation device realizes the circulation of the blanket coolant nuclide based on the mass conservation equation and the burnup equation. The application is based on the Boltzmann neutron transport equation, the neutron flux of the blanket coolant is simulated by a Monte Carlo method, the time and space variation law of the chemical composition of the system material is obtained by solving the burnup equation, the replenishment demand of the blanket coolant system is calculated, and the influence of the replenishment composition on the blanket tritium breeding rate is simulated, so that the application can be widely applied to the fusion reactor liquid lithium lead blanket.

The application discloses a metal fuel irradiation test physical thermal analysis method, device, equipment and medium, relates to the field of nuclear reactor physics and thermal engineering, and comprises the following steps: determining the burnup depth information of the metal fuel according to the measured thermal power, inputting the burnup depth information into a pre-configured structure swelling model for analysis, obtaining the volume swelling rate of the metal fuel in the axial direction and the radial direction, updating the structure size of the metal fuel according to the volume swelling rate, and updating the thermal conductivity of the metal fuel according to the updated structure size; according to the burnup depth information, the updated structure size of the metal fuel and the burnup distribution situation calculated by the burnup management calculation model based on the determinism method, the burnup distribution curve of the metal fuel at the corresponding irradiation time is refitted, the heat release calculation is carried out according to the burnup distribution curve, and the heat release distribution information of the metal fuel is obtained; the heat release distribution information of the metal fuel, the updated structure size and the thermal conductivity of the metal fuel are input into a sub-channel analysis model for thermal analysis, and the key thermal parameters of the metal fuel are obtained.

The invention provides a reactor control method based on a rapid power reduction system, electronic equipment and a medium, and relates to the technical field of nuclear reactors. The rapid power reduction system comprises a plurality of control rods for rapid power reduction, each control rod comprises a grey rod group, and the reactor control method based on the rapid power reduction system comprises the following steps: acquiring a corresponding relation between an insertion depth limit value of the control rod and reactor core burnup; and controlling the operation rod position of the control rod not to exceed the insertion depth limit value corresponding to the current burn-up step according to the corresponding relation. By limiting the insertion depth of the operation rod position of the control rod for rapid power reduction, it is ensured that the rapid power reduction system has enough rod value to fall into the reactor core, the operation complexity is reduced, and the operation safety of the nuclear power plant is improved.

The present disclosure relates to the technical field of reactor fuel management, and particularly relates to a nuclear fuel management method of a multi-module pebble bed high temperature gas cooled reactor. The method comprises: obtaining first fuel management information in a first module initial loading and a transition process according to first input information corresponding to the multi-module pebble bed high temperature gas cooled reactor; obtaining second fuel management information in a second module initial loading and a transition process according to low enrichment shallow burnup spent fuel element information corresponding to the first module and second input information corresponding to the second module; obtaining third fuel management information in a fourth module initial loading and a transition process according to low enrichment shallow burnup spent fuel element information corresponding to at least one third module and second input information corresponding to the fourth module; and executing the fuel management information set according to an evaluation result of the fuel management information set in the process of executing the fuel management information set. The present disclosure can improve the accuracy of nuclear fuel management and improve the utilization rate of fuel elements.

The invention discloses a reactor core power control method which comprises the following steps: during base load operation, inserting and / or lifting a T rod group for temperature regulation and compensation of reactor core reactivity change into and / or from a reactor core, and compensating reactor core temperature change caused by excess reactivity and burnup effect; during operation in a load tracking mode, the effect caused by power change and the coolant temperature change caused by xenon poison change effect are compensated by the T rod group, and the average temperature of the coolant is kept in an operation interval. According to the reactor core power control method disclosed by the invention, automatic control of the reactor core power and temperature in the reactor core operation process is realized only through insertion / lifting of the T rod group; the method is suitable for the reactor core with low linear power density, and under the condition of no axial power distribution control requirement, the reactor core axial power distribution under various normal operation and accident working conditions can still ensure the safety of the reactor core.

The invention is applicable to the technical field of nuclear reactors, and provides a xenon reactivity calculation method, device, equipment and product for a nuclear reactor. The method comprises the following steps: acquiring current set parameters for processing furnace charge in the nuclear reactor and multiple groups of optimal xenon information corresponding to the nuclear reactor; the furnace charge in the nuclear reactor generates xenon in the fission reaction process; according to the multiple sets of optimal xenon information, target xenon parameters of the nuclear reactor processed under the current furnace charge circulation parameters and the current furnace charge burnup parameters are determined; the xenon reactivity generated by the charge in the nuclear reactor is calculated based on the target xenon parameter. According to multiple groups of optimal xenon information corresponding to the nuclear reactor, the target xenon parameters processed by the nuclear reactor under the current furnace charge circulation parameters and the current furnace charge burnup parameters are determined, and the xenon reactivity is calculated according to the target xenon parameters, so that the accuracy of the xenon reactivity is improved; and an effective reference basis is provided for an operator to manage the nuclear reactor.

A long-cycle, high-burnup fuel management method based on accident-tolerant fuel, belonging to the nuclear power field, is proposed. This method targets pressurized water reactors comprising 157 fuel assemblies and includes the following steps: providing a replacement group, comprising a first-class fuel assembly and a second-class fuel assembly using accident-tolerant fuel with an enrichment of not less than 5.5%, wherein the first-class fuel assembly includes IFBA combustible poison rods, and the second-class fuel assembly includes IFBA combustible poison rods and Gd-containing combustible poison rods; during refueling, one fuel assembly and 68 remaining reserve fuel assemblies with the lowest reactivity are removed from the core center, and the remaining reserve fuel assembly with the highest reactivity from the spent fuel pool is loaded into the core center and placed into the replacement group. This method enables a long-cycle refueling of 24 months, effectively flattening core power and improving the economics of nuclear power plants.

A metal hydride fuel burn-up self-sustaining reactor core controlled by burnable poison relates to the technical field of nuclear reactor cores, and comprises a low-enrichment-degree control rod-free fuel assembly located in the center of the reactor core, and a middle-enrichment-degree control rod-free fuel assembly arranged around the periphery of the low-enrichment-degree control rod-free fuel assembly. A middle-enrichment-degree safety rod-containing fuel assembly is arranged between the fuel tank and the fuel tank; a high-enrichment-degree control rod-free fuel assembly is arranged around the periphery of the medium-enrichment-degree control rod-free fuel assembly, and a medium-enrichment-degree compensation adjusting rod-containing fuel assembly is arranged between the medium-enrichment-degree control rod-free fuel assembly and the high-enrichment-degree control rod-free The periphery of the high-enrichment-degree control rod-free fuel assembly is filled with lead bismuth; the reactor core is used for solving the problem that a traditional reactor core is difficult to reach expected burnup depth and even causes short service life.

This invention provides a method for evaluating the properties of fuel debris containing a mixture of nuclear fuels with varying burnup levels. [Solution] The evaluation method includes the step of calculating the fissile material ratio indicating the properties of the fuel debris based on the evaluated values ​​of the Cm-244 count rate and the amount of fissile material of the fuel debris, data showing the correlation between the ratio of the Cm-244 count rate and the amount of fissile material and the fissile material ratio, and / or the evaluated values ​​of the Eu-154 count rate and the amount of fissile material of the fuel debris, data showing the correlation between the ratio of the Eu-154 count rate and the amount of fissile material and the fissile material ratio.

A method for loading burnable poisons to reduce tritium emissions in nuclear power plants, belonging to the field of nuclear power. The method includes the following steps: providing a first type of fuel assembly used in the reactor, providing tritium-reducing burnable poison rods, and loading Gd-containing burnable poisons in the tritium-reducing burnable poison rods; replacing at least part of the integral burnable poison fuel rods in the first type of fuel assembly with tritium-reducing burnable poison rods to obtain a second type of fuel assembly, iteratively calculating and obtaining the structure of the second type of fuel assembly that meets the safety design requirements, and using the second type of fuel assembly for fuel replacement. This method uses tritium-reducing burnable poison rods with a longer burnup consumption time, thereby reducing the demand for soluble boron in the primary loop and achieving the effect of reducing tritium emissions.

The present invention discloses a boron-containing spherical fuel element for a high-temperature gas-cooled reactor, which includes a fuel zone and a fuel-free zone from the inside out; the fuel zone includes coated fuel particles and a graphite matrix; the coated fuel particles are, from the inside out, concentric UO2 cores, loose pyrolytic carbon layers, inner dense pyrolytic carbon layers, SiC layers, ZrB2 layers, and outer dense pyrolytic carbon layers; wherein the thickness of the ZrB2 layer is 5 to 20 μm; the coated fuel particles are dispersed in the graphite matrix. The boron-containing spherical fuel element for a high-temperature gas-cooled reactor in the embodiment of the present invention avoids the risk of failure of the SiC coating by coating the surface of the SiC layer in the coated fuel particles with a ZrB2 coating, and can improve the performance of the spherical fuel element. 235 U enrichment can reduce the number of fuel elements loaded and increase the fuel burnup depth at the same reactor power level, thereby enhancing the economic value of high-temperature gas-cooled reactors.

The invention relates to the technical field of reactor fuel management, in particular to a nuclear fuel management method of a multi-module pebble-bed high-temperature gas cooled reactor. The method comprises the following steps: according to first input information corresponding to a multi-module pebble-bed high-temperature gas cooled reactor, obtaining first fuel management information in a first module initial loading reactor and a transition process; according to the low-enrichment-degree light-burn-up spent fuel element information corresponding to the first module and second input information corresponding to the second module, second fuel management information in the initial loading and transition process of the second module is obtained; according to the low-enrichment-degree light-burn-up spent fuel element information corresponding to at least one third module and the second input information corresponding to the fourth module, third fuel management information in the initial loading and transition process of the fourth module is obtained; and in the process of executing the fuel management information set, executing the fuel management information set according to the evaluation result of the fuel management information set. The accuracy of nuclear fuel management can be improved, and the utilization rate of fuel elements is increased.

This invention relates to a method and system for optimizing the irradiation energy spectrum of reactors producing radioisotopes. The method employs an intelligent optimization algorithm (genetic algorithm) to construct a large number of irradiation energy spectra, builds a burnup database based on these spectra, and performs burnup calculations to determine the yield of various radioisotopes. This determines the optimal energy spectrum for producing various radioisotopes and their theoretically highest yield, thereby improving the production efficiency of reactors irradiating various radioisotopes. Compared with existing technologies, the method of this invention can determine the optimal irradiation energy spectrum and theoretically highest yield for reactors producing multiple radioisotopes, overcoming the limitations of traditional methods that struggle to determine the optimal irradiation energy spectrum for reactor irradiation production of various radioisotopes and achieve energy spectrum optimization.