40 results about "Gamma energy" patented technology

The invention relates to the technical field of precision agriculture, and provides a variable rate fertilization prescription map generation method and system based on a gamma-ray energy spectrum. The method comprises the following steps: acquiring field data through a gamma-ray energy spectrometer, a soil sensor and remote sensing equipment, and predicting spatial distribution of available nutrients in soil by adopting feature fusion and a machine learning model; calculating a target yield fertilization amount based on a nutrient balance method; calculating the fertilizer shortage corrected by the soil texture; carrying out weighted fusion on the graded fertilization amount and the economic optimal fertilization amount to generate a recommended fertilization amount and making a prescription map; precise fertilization control is realized through a positioning and control algorithm in combination with feed-forward compensation or a Smith predictor; and an active learning strategy is adopted to identify a high-uncertainty region, and verification is preferentially carried out to continuously optimize the model. According to the method, soil spatial variation, crop requirements and economic benefits are integrated, accurate fertilization recommendation is realized, the fertilizer utilization rate is effectively increased, and the economic benefits are guaranteed.

The invention provides a while-drilling radioactive logging system, a logging method and a drilling tool assembly, and belongs to the technical field of oil-gas exploration, and the system comprises at least one perovskite semiconductor detector which is used for directly absorbing gamma rays from a stratum and generating corresponding electric pulse signals; the electronics module is electrically connected with the perovskite semiconductor detector and used for processing the electric pulse signal to obtain while-drilling radioactive logging data, and the while-drilling radioactive logging data comprises at least one of natural gamma counting data, natural gamma energy spectrum data and gamma-gamma density data; the protection packaging body comprises a metal shock-resistant and high-pressure-resistant shell, a heat insulation and heat preservation layer and a heat channel which are arranged in the metal shock-resistant and high-pressure-resistant shell, and a high shock-resistant and impact-resistant connecting piece for fixing internal devices, and the protection packaging body is used for accommodating the perovskite semiconductor detector and the electronics module; and the safety and the accuracy of radioactive logging while drilling are improved.

The utility model discloses a storage type gamma magnetic positioning combined logging instrument which comprises a shell, a thermos bottle and a CCL magnetic detection assembly are fixedly arranged in the shell, and a gamma detection assembly and a circuit module are arranged in the thermos bottle and used for collecting, processing and storing gamma data and CCL signal data. The gamma detection assembly is arranged below the circuit module; the gamma detection assembly and the CCL magnetic detection assembly are electrically connected with the circuit module. The two ends of the shell are provided with a protective cap and a protective plug in a threaded connection mode respectively. According to the storage type gamma magnetic positioning combination logging instrument, the two logging units of the gamma energy spectrum instrument and the CCL instrument are designed and combined into one logging unit, the length of the instrument is shortened, the logging construction risk is greatly reduced, the pumping-out or direct pushing technology is adopted, real-time data storage is achieved in the logging process, and the logging efficiency is improved. The defects existing in cable type logging are well overcome.

The application discloses a kind of based on pulse neutron technology's borehole in-situ lithium ore content measurement method and device, device includes pulse neutron generator, neutron detector, gamma detector and electronic processing equipment, measurement method includes: obtaining the time spectrum information of borehole in-situ place detection neutron, according to time spectrum information, neutron lifetime is calculated;According to the formation of different lithium ore grade under the macroscopic cross section of neutron lifetime calculation;According to the relationship equation of formation macroscopic cross section and lithium content, based on the calculation of formation macroscopic cross section, obtains scale lithium content;The calibration curve of lithium content is scaled based on the distribution of formation macroscopic cross section and scaled calculation, and the actual lithium ore grade distribution of formation is obtained.According to the change of time spectrum attenuation under different borehole size, wellbore correction equation is established, and the influence of wellbore is corrected.According to gamma energy spectrum, the content of hydrogen in water-containing wellbore is monitored, and the influence of water-containing wellbore is corrected according to hydrogen characteristic peak count.

This invention belongs to the field of uranium resource exploration technology, specifically relating to a method and apparatus for detecting gamma rays. The method includes: utilizing... 241 The equivalent peak position after the interaction of Am and NaI(Tl) crystals serves as a self-stabilizing peak, providing a stable gamma-ray reference peak and achieving automatic spectrum stabilization. A digital high-speed multichannel module acquires gamma-ray signals, achieving full acquisition of gamma-ray signals in the energy range of 30keV to 3000keV. Multiple Regions of Interest (ROIs) are set for the acquired gamma-ray signals using digital energy thresholds, obtaining CPS counts for the quantitative gamma energy range, the natural gamma energy range, and the uranium-thorium-potassium (UHT) energy range of the gamma spectrum. Using the calibration coefficients of each parameter in the standard model, and based on the CPS counts for the quantitative gamma energy range, the natural gamma energy range, and the UHT / UHT energy range of the gamma spectrum, the quantitative gamma, natural gamma, and gamma spectrum detection results are output. This invention enables a single probe to simultaneously output measured data for quantitative gamma, natural gamma, and gamma spectra, improving the efficiency of acquiring these data.

The present application relates to the technical field of nuclear radiation monitoring, in particular to a kind of water total radioactivity and nuclide online measurement system, comprising: gamma detector, beta detector, alpha detector and water treatment component, the water treatment component extracts water sample and processes after passing through the gamma detector, beta detector and alpha detector, the gamma detector is arranged in the first shielding body, the beta detector and the alpha detector are arranged in the second shielding body;Water treatment component provided by the present application is responsible for extracting and processing water sample, so that it passes through various detectors in turn, gamma detector obtains the gamma energy spectrum of water sample, beta detector and alpha detector obtain the beta and alpha total activity of water sample, to realize the accurate detection of different types of radiation.

The present application relates to a pressurized water reactor fuel cladding breakage online monitoring method and a monitoring system thereof, the method comprising the following steps: step S1: obtaining a pre-established energy calibration relationship, which is a corresponding relationship between gamma ray energy and channel number; step S2: obtaining pre-calibrated efficiency curve parameters, which are obtained through active efficiency calibration based on a simulated tubular standard radioactive source, the material, outer diameter and inner diameter of the simulated tubular standard radioactive source being consistent with those of the measured pipeline; step S3: obtaining gamma energy spectrum data through a back-to-back coincidence measurement technology, and automatically deconvoluting the gamma energy spectrum data according to the energy calibration relationship and the efficiency curve parameters to calculate the type and activity concentration of fissile nuclides in the measured pipeline; and step S4: determining a corresponding preset threshold value according to the type of fissile nuclides, and comparing the activity concentration with the preset threshold value to obtain a monitoring result of pressurized water reactor fuel cladding breakage.

The invention relates to the technical field of underwater detection, and discloses an underway marine radioactivity monitoring system and a radioactivity energy spectrum processing method thereof, and the method comprises the steps: obtaining detection energy spectrum data which is a low-count gamma energy spectrum collected under an underway measurement condition; constructing an energy spectrum response matrix, wherein the energy spectrum response matrix is used for representing the response relationship of different energy gamma rays in the detector; based on a compressed sensing reconstruction algorithm, solving the detection energy spectrum data by using the energy spectrum response matrix to obtain an original emergent gamma energy spectrum; and nuclide identification and activity calculation are carried out according to the original emergent gamma energy spectrum. According to the scheme, efficient and accurate processing of the underway measurement low counting energy spectrum can be realized.

The invention relates to an online single-sphere neutron gamma-ray spectrum detector and a detection system. Wherein the detector comprises a spherical moderation body and a plurality of detectors; the plurality of detectors are arranged on the spherical moderator, the distances from the plurality of detectors to the sphere center of the spherical moderator are different, the plurality of detectors are arranged at the same depth from the sphere center of the spherical moderator, and the plurality of detectors at least comprise a CLYC detector. According to the invention, the plurality of detectors are arranged in the same spherical moderator, and the plurality of detectors are arranged at positions with different distances from the sphere center of the spherical moderator, so that large-range energy detection can be realized, the size is small, the weight is light, and carrying is convenient; moreover, the device comprises a CLYC detector, so that the device has the capability of detecting neutrons and gamma information at the same time.

The application discloses a lithium ore granite pegmatite vein ore body precise positioning detection method and relates to the technical field of mineral resources exploration. The method circumscribes a first target area through regionalized exploration, then arranges a comprehensive detection profile in the target area, uses the spatial superposition constraint of four methods of high-density resistivity, time-domain induced polarization, ground gamma energy spectrum and portable X-ray fluorescence spectrum to exclude false anomalies of carbonaceous slate and feldspar veins, determines a continuous section meeting multi-condition coupling as a precise positioning target area, further generates a three-dimensional resistivity body and a polarization rate body based on multi-profile inversion data, extracts a resistivity equipotential surface to predict the spatial distribution of the pegmatite vein body, and designs a verification borehole. In the drilling verification link, a local natural mineral base material is compounded with an environment-friendly mud, layered adaptive drilling is adopted, drill cuttings-mud in-situ aerobic composting is carried out, and the composting products are backfilled and repaired in cooperation with local dominant plant seeds, so that rapid ecological restoration is realized.

The invention discloses a nuclide identification method based on KNN classification. The nuclide identification method comprises the following steps: 1) performing dimension reduction on original high-dimensional gamma energy spectrum data of a training sample by using a principal component analysis (PCA); 2) performing attribute reduction on gamma energy spectrum features of the training sample after PCA dimension reduction through a neighborhood rough set, and rejecting redundant features and retaining a feature set with the most discriminant ability through heuristic search based on attribute dependency; and 3) utilizing the feature set obtained in the step 2) to realize rapid nuclide identification of the to-be-detected sample through a K-nearest neighbor classification method. According to the method, PCA dimension reduction, attribute reduction and KNN classification methods are fused, high recognition precision can be kept, meanwhile, better calculation efficiency is achieved, and the method is suitable for portable equipment with limited resources to achieve real-time and accurate nuclide recognition.

The invention discloses a method and a device for predicting a leakage hazard range of a nuclear facility, and relates to the technical field of nuclear response emergency. The method comprises the following steps: acquiring reconnaissance data corresponding to a nuclear facility leakage area; performing energy spectrum preprocessing on the gamma energy spectrum original pulse signal to obtain processed energy spectrum data, and performing background deduction processing on the processed energy spectrum data based on an adaptive SNIP algorithm to obtain net energy spectrum data; performing nuclide identification processing according to the net energy spectrum data to obtain a nuclide identification result, and performing nuclide activity concentration calculation based on the nuclide identification result and the nuclear radiation reconnaissance data to obtain nuclide activity concentration; performing source item inversion based on geographic data, meteorological data and nuclide activity concentration to obtain leakage source item information; and obtaining a hazard range prediction result based on the meteorological data, the leakage source item information and the nuclide activity concentration. According to the invention, the sampling precision of the system can be improved, the pulse accumulation can be reduced, the accumulation discarding problem can be effectively solved, and the adaptability is higher.

The application discloses a kind of uranium mine logging instrument based on ultrashort pulse neutron and working method thereof, it is related to uranium mine exploration well logging field;Logging instrument includes control communication nipple arranged in sequence along its axial direction, ultrashort pulse neutron generator for emitting fast neutron pulse with pulse width less than 1 microsecond to formation, shielding body, dual thermal neutron detection assembly for detecting thermal neutron and superhot neutron on spatially consistent measurement point, gamma detector for detecting non-elastic scattering gamma ray and capture gamma ray emitted by formation element, and fast neutron detector and multichannel synchronization and high-speed acquisition circuit for detecting and outputting source intensity monitoring signal of fast neutron pulse in real time;The logging instrument of the application emits ultrashort fast neutron pulse and detects neutron yield in real time, combines to obtain neutron time spectrum and multi-dimensional information of gamma energy spectrum with accurate time stamp, carries out high-precision, anti-interference inversion to formation uranium content, and efficiently and accurately obtains formation information.

The present application relates to the technical field of nuclear radiation, and discloses a nuclear medicine radioactivity purity online detection system based on energy spectrum analysis, which comprises a synchronous signal acquisition module, a real-time background suppression module for carrying out correlation screening on the gamma energy spectrum based on the environmental background radiation to obtain a background suppression energy spectrum of the nuclear medicine sample, a target peak shape extraction module, a dynamic response spectrum construction module for driving simulation of the target nuclide of the gamma energy spectrum based on the pure target peak spectrum and a preset detector response function to obtain a dynamic full response spectrum of the target nuclide, a dynamic spectrum contribution stripping module for carrying out contribution spectrum accurate stripping on the spectrum contribution of the target nuclide based on the background suppression energy spectrum and the dynamic full response spectrum to obtain a limit residual spectrum of the nuclear medicine sample, an impurity characteristic identification module and a radioactivity purity calculation module. The present application can improve the online detection efficiency of the nuclear medicine radioactivity purity based on energy spectrum analysis.

The application discloses a kind of gamma energy spectrum feature extraction method and system based on energy spectrum two-dimensional coding, belong to nuclear detection and energy spectrum signal processing technical field, this method includes: obtaining and pre-processing gamma energy spectrum data;One-dimensional energy spectrum sequence is mapped into two-dimensional energy spectrum matrix by two-dimensional coding;Local structure enhancement is carried out to two-dimensional energy spectrum matrix, multi-scale transformation, space feature compression and statistical feature embedding, and two-dimensional energy spectrum feature map is constructed;High-dimensional spectral feature expression is obtained by using feature extraction model to carry out multilevel processing to two-dimensional energy spectrum feature map;The high-dimensional spectral feature output is used for nuclide identification, element content inversion and other gamma energy spectrum analysis application.The application enhances the energy spectrum structure feature expression ability by two-dimensional coding mode, realizes the efficient, stable and fine use of energy spectrum information.

The application discloses a coal quality multi-element nondestructive analysis method based on a compact D-D neutron source, relates to the technical field of nondestructive testing, and solves the technical problem that the existing neutron activation analysis technology based on a nuclear reactor cannot quickly and accurately detect the content of each element in a coal sample due to high equipment cost, large size and complicated operation; the application prepares elemental samples of each element, collects pure gamma energy spectrum of the elemental samples by using a gamma detector, and constructs a single-element spectrum matrix; a simulated coal sample is prepared, and its pure gamma energy spectrum is obtained; based on the single-element spectrum matrix and the pure gamma energy spectrum of the simulated coal sample, the content of elements in the simulated coal sample is analyzed; the content of elements when the simulated coal sample is prepared is compared with the content of elements in the simulated coal sample obtained through analysis, and a test method for coal quality element information in reality is determined; and the application realizes quick and accurate detection of the content of multiple elements in a coal sample, which is crucial for the development and utilization of coal resources.

The present application relates to a kind of based on ground gamma energy spectrum data's flight data quick simulation complementing method, comprising: arranging existing aerial gamma energy spectrum data in research area, the average height h of statistics measurement is extracted data missing range;Collect ground gamma energy spectrum data information in data missing area, and obtain the potassium, uranium, thorium count rate of ground 0 m height;The count rate data of ground 0 m height is gridded, and artificial generation flight path data is extracted and established ground 0 m height count rate database;Obtain height attenuation coefficient, the aerial sensitivity coefficient of height h;According to ground 0 m height count rate database, according to the response contribution of measuring point data in certain area, integral obtains simulated aerial count rate data;According to simulated aerial count rate data, obtain aerial gamma energy spectrum data.The present application can quickly complement the data of missing area, uses ground gamma energy spectrum measurement to replace aerial gamma energy spectrum measurement, greatly saves cost.

The invention discloses a precise irradiation system and irradiation method for neutron irradiation breeding, and the system comprises a thermal neutron source which is used for generating a thermal neutron beam; the capillary neutron lens is used for focusing the thermal neutron beam; the seed conveying device is used for adsorbing and conveying seeds, so that the embryo parts of the seeds are aligned with the beam focus position of the capillary focusing lens; a high-purity germanium detector and a collimator; the activation foil assembly is arranged at a position adjacent to the seed embryo part target region; the controller is respectively connected with the thermal neutron source, the capillary neutron lens, the vacuum adsorption type seed conveying device and the high-purity germanium detector, and is used for setting the pulse frequency of the thermal neutron beam and the conveying frequency of the seed conveying device according to the designed irradiation dose; and obtaining the neutron effective dose of the seed embryo target region based on the gamma energy spectrum in combination with inversion of an activated foil analysis method, and adjusting at least one beam parameter and / or the transmission frequency in real time according to the deviation between the neutron effective dose and the target dose so as to realize quantitative irradiation of the single seed embryo.

The invention relates to the technical field of detection instruments, and discloses a radioactive geophysical prospecting measurement device for prospecting, the radioactive geophysical prospecting measurement device for prospecting comprises a handheld gamma energy disperse spectroscopy and a grip, the two sides of the outside of a display screen are both provided with protective shells, the close sides of the two protective shells abut against each other, the rod wall of a rotating rod is fixedly sleeved with a connecting rod, and the connecting rod is connected with the handheld gamma energy disperse spectroscopy. And one end of the connecting rod extends to the inner side of the protective shell. According to the radioactive geophysical prospecting measuring device for prospecting, the device can be connected to an arm, the device is prevented from accidentally slipping out of the hand and falling to the ground as much as possible, the two rotatable protective shells are arranged, and when the handle is loosened, the device can automatically rotate to shield and protect the vulnerable part of the device, so that the device has high safety during use; through the micro motor and the electric push rod, the distance between the equipment probe and the to-be-measured ore body is shortened, the road holding force of the equipment is enhanced, the influence of topographic relief and ground surface soil, covering soil and particles on the detection precision of the instrument is reduced, and the precision of a measurement result is improved.

The application provides a mine sample analysis method and system based on spectrum correction, and relates to the technical field of mine composition analysis. First, a first mine sample is pretreated, and XRF energy spectrum and gamma energy spectrum are obtained respectively, then fusion processing is performed on the two energy spectrums to obtain a first spectrum fusion feature vector, mineral combination analysis information of the first mine sample is obtained based on machine learning model analysis, finally, at least one mine sample with a similarity meeting a preset requirement is found in historical mine sample data according to the mineral combination analysis information, and collection parameters of a determined target mine sample are used as an optimal photon energy-time parameter set, analysis processing of the first mine sample is completed, and an analysis report is formed. The technical scheme of the application determines the best analysis parameters through two steps of artificial intelligence and big data screening, so that the mine analysis result is more accurate.

The embodiment of the present application provides a kind of gamma energy fluence spectrum correction method, storage medium, correction device and correction system, the gamma energy fluence spectrum correction method includes: based on the parameter model of detector, the parameter model of shielding structure and the neutron source parameter of irradiation beam are carried out Monte Carlo simulation, obtain the simulated pulse amplitude spectrum of secondary gamma ray induced by neutron;Total gamma ray pulse amplitude spectrum is obtained, and the total gamma ray pulse amplitude spectrum is obtained by detector to the irradiation beam of shielding structure measurement;According to the simulated pulse amplitude spectrum of secondary gamma ray, total gamma ray pulse amplitude spectrum is corrected, and primary gamma ray pulse amplitude spectrum is obtained;Primary gamma ray pulse amplitude spectrum is resolved to obtain gamma energy fluence spectrum.The gamma energy fluence spectrum correction method of the embodiment of the present application can improve the accuracy of detector measurement result.

The present application relates to the field of geophysical well logging, and discloses a carbon-oxygen ratio oil saturation prediction method based on SNIP algorithm and related equipment, the method comprising obtaining inelastic and capture gamma energy spectrum; performing energy spectrum processing on the obtained inelastic and capture gamma energy spectrum to obtain element characteristic gamma energy spectrum; extracting gamma counts of element characteristic gamma energy peaks according to the element characteristic gamma energy spectrum; obtaining element characteristic energy window gamma count ratio parameters according to the gamma counts of element characteristic gamma energy peaks; constructing a saturation calculation model, inputting the element characteristic energy window gamma count ratio parameters into the saturation calculation model to calculate carbon-oxygen ratio oil saturation. The present application obtains inelastic and capture gamma energy spectrum, then uses SNIP algorithm to finely process the energy spectrum to obtain element characteristic gamma energy spectrum, improves the accuracy of element identification, and constructs a saturation calculation model to more accurately predict oil saturation.

This invention discloses a tomographic gamma-ray transmission image reconstruction method combining ART and BM3D, comprising: measuring the transmission gamma energy spectrum and calculating projection data; dividing the tomographic voxels and calculating the voxel attenuation track length; establishing an underdetermined set of equations for transmission image reconstruction; setting initial values ​​for the transmission image; iterating using ART and outputting a noisy image; denoising the noisy image output by ART using BM3D; repeating the iteration and outputting the final transmission image. This solution solves the technical problem of low accuracy in tomographic gamma-ray transmission image reconstruction under conditions of severe undersampling of projection data, achieving transmission image reconstruction while improving its accuracy. This method directly calls the BM3D module in the computer program, making it easy to implement and highly applicable to image reconstruction with undersampling data.

The invention discloses a corrosion product source item deposition characteristic on-line monitoring device and method based on neutron source activation. The corrosion product source item deposition characteristic on-line monitoring device comprises a water storage tank, a corrosion sample activation test section, a simulation reactor core test section, a main pipeline heat pipe section simulation body, a steam generator simulation body and a main pipeline cold pipe section simulation body. A neutron source is arranged in the corrosion sample activation test section and is used for performing irradiation activation on a corrosion product in a test solution; and gamma-ray energy disperse spectrums D1, D2, D3 and D4 are respectively arranged beside the simulation reactor core test section, the main pipeline heat pipe section simulation body, the steam generator simulation body and the main pipeline cold pipe section simulation body. According to the method, deposition behaviors of corrosion products in a pressurized water reactor primary loop coolant after being activated by neutrons on the surfaces of a fuel element, a steam generator heat transfer pipe and a main pipeline are simulated in a laboratory environment, and deposition radioactive characteristics of the corrosion products on the surfaces of all parts after a neutron source is activated are detected on line through a gamma energy disperse spectroscopy; and online measurement of source item deposition characteristics of surface corrosion products of different parts is realized.

The embodiment of the invention relates to the field of detection by applying nuclear radiation, in particular to a method and system for predicting the rock color of a target layer in a sandstone type uranium mine exploration area. According to the method and the system for predicting the color of the target layer rock in the exploration area of the sandstone type uranium mine provided by the embodiment of the invention, gamma-ray spectrum thorium-potassium data and uranium data in the range of the exploration area can be inversely determined according to the seismic pure wave data and the borehole logging data; further, the distribution of radioactive elements related to the shale content and uranium migration in the exploration area can be accurately determined; the uranium content of the target layer is deduced by using the relatively stable and easily associated thorium and potassium information and element distribution relation in the seismic data, the precision and reliability of lithology identification and environmental interpretation are improved, the deep concealed sandstone uranium mine target layer can be rapidly and nondestructively detected, and the accurate evaluation of the uranium mineralization environment is facilitated.

The embodiment of the application discloses a buried hill reservoir fluid property identification method and device, the method comprises the following steps: obtaining detection results corresponding to a plurality of detectors on a logging instrument; the plurality of detectors comprise a near detector, a far detector and a long detector, and the detection results comprise a total gamma count curve, non-elastic gamma energy spectrum data and / or capture energy spectrum data; determining an index data body according to the detection results corresponding to two detectors in the plurality of detectors; determining a curve envelope feature of a target reservoir section according to the total gamma count curve corresponding to the near detector and the long detector after non-reservoir section calibration processing; and identifying the fluid property of the target reservoir section according to the local index data corresponding to the target reservoir section in the index data body and the curve envelope feature of the target reservoir section. The embodiment of the application realizes the buried hill reservoir fluid property identification based on multi-parameter coupling analysis, and can ensure the pertinence and accuracy of the fluid property identification.

The utility model discloses a low-background alpha-gamma energy spectrum composite measuring device, and belongs to the technical field of nuclear radiation measuring devices. The low-background alpha-gamma energy spectrum composite measurement device comprises a lead shielding layer, a lead shielding cover, a compression bar type hinge, a base, a lifting motor, a detector fixing frame, an alpha detector, a gamma detector and a pull-out sample table, the detector fixing frame can ascend and descend in the lead shielding layer, and an alpha detector, a drawing type sample table and a gamma detector are installed on the detector fixing frame; the liftable detector fixing frame can be used for realizing convenient sample replacement, and meanwhile, the relative positions of the alpha detector, the gamma detector and the sample can be kept fixed, so that the detection efficiency is kept unchanged. The low-background alpha-gamma energy spectrum composite measurement device is reasonable in design and convenient to use, alpha-ray and gamma-ray energy spectrum composite measurement of the sample can be realized, the radionuclide measurement range is expanded, alpha and gamma radionuclides in the sample can be qualitatively identified, and the radioactive activity of the sample can be quantitatively calculated.

The embodiment of the invention relates to the field of electric digital data processing, in particular to a method and system for determining the reactor core power of a sodium-cooled fast reactor and a computer readable storage medium. According to the method and the system, the energy deposition of the determined neutrons and gamma rays on the material is more accurate by determining the material kerma coefficient of each region of the reactor core three-dimensional model, and compared with other methods without considering the factor, the method and the system are more in line with the physical reality, so that the coincidence degree of the determined reactor core power and the actual situation is higher. Compared with Monte Carlo calculation of the whole reactor core, the method can maintain high fidelity, is higher in calculation efficiency, and is more suitable for mass calculation and sensitivity analysis in the reactor design stage. According to the computer readable storage medium provided by the embodiment of the invention, the computer program capable of executing the method is stored, so that the whole reactor core power distribution can be directly obtained through one-time high-fidelity transport calculation, the reactor core power calculation precision is improved, and the calculation efficiency is ensured.

The present application belongs to the technical field of nuclear material retention amount measurement and analysis, and particularly relates to a detection efficiency correction method for nuclear material retention amount analysis and a detector, wherein the method comprises the following steps: step S1, establishing a mathematical model suitable for a detection object; step S2, obtaining an environmental background and a gamma energy spectrum of the detection object; step S3, analyzing a full-energy peak area of characteristic gamma rays in the gamma energy spectrum; step S4, deducting the contribution of the environmental background to obtain a count rate of characteristic gamma rays of the nuclear material retention amount; step S5, determining intrinsic detection efficiency; step S6, determining geometric detection efficiency; step S7, performing decay absorption efficiency correction to obtain a decay correction parameter; and step S8, introducing the decay correction parameter to calculate the nuclear material retention amount.