Method and device for calculating the amount of c-14 accumulated in crops during short-term releases from nuclear facilities

Abstract

The application provides a method and device for calculating the C-14 accumulation amount in crops during short-term release of nuclear facilities, and the method comprises the following steps: obtaining the dry weight change curve of crops around a nuclear power plant during short-term release of the nuclear facility, and obtaining a function of the C-14 concentration change with time in the growth environment of the crops around the nuclear power plant; calculating the growth rate of the C-14 accumulation amount in the crops around the nuclear power plant during short-term release of the nuclear facility; and calculating the C-14 accumulation amount in the crops during short-term release of the nuclear facility according to the growth rate of the C-14 accumulation amount in the crops around the nuclear power plant during short-term release of the nuclear facility. The application can more accurately calculate the C-14 accumulation amount in crops during short-term release, and simultaneously realize the evaluation and rapid prediction of the environmental impact of C-14 under the conditions of short-term release of nuclear facility predicted operation events and accidents.

Description

Technical Field

[0001] This invention relates to the field of radiation protection and environmental protection technology, specifically to a method and apparatus for calculating the cumulative amount of C-14 in crops during a short-term release from a nuclear facility. Background Technology

[0002] C-14 is a significant radionuclide emitted into the environment during nuclear power plant operation and is one of the major contributors to global radiation dose. According to UNSCEAR research, gaseous C-14 accounts for approximately 70% of global radiation dose from pressurized water reactor (PWR) effluents, with normalized emissions of C-14 from PWRs reaching 220 GBq / (GWe·a) between 1998 and 2002. Because high-temperature reactors, which will be put into operation in the future, use graphite as a moderator, their C-14 emissions will be on an even larger scale. During the operation of other types of nuclear facilities, C-14 often contributes significantly to public radiation exposure due to its involvement in photosynthesis in crops.

[0003] Compared to other radionuclides emitted by nuclear power plants, C-14 differs in the following ways: 1. C-14 is primarily emitted from nuclear power plants in gaseous form (mainly 14CO2), and its removal is costly and technically challenging, leading to global diffusion; 2. C-14 has a long half-life of 5730 years, meaning it persists in the environment long after release; 3. Carbon is a major component of living organisms. Like C-12, C-14 emitted from nuclear power plants enters plants through photosynthesis as carbon dioxide, subsequently entering the biosphere and accumulating in the food chain. Ingestion by the public can cause internal radiation exposure. Therefore, assessing the migration, diffusion, and dose of C-14 is particularly important in densely populated areas or areas with extensive farmland surrounding the plant site.

[0004] Currently popular methods for C-14 dosage assessment typically employ specific activity models to estimate C-14 content in crops. These models assume that the ratio of C-14 concentration to stable carbon concentration within plants is the same as that in the surrounding atmosphere. However, specific activity models are only applicable during normal operation of nuclear power plants, assuming that C-14 in gaseous effluents released over a long period has reached a stable level in the environment. For anticipated operational events involving large-scale C-14 releases in a short period, or certain accident scenarios, the C-14 concentration in the environment is usually not stable. Therefore, the C-14 content in crops calculated using specific activity models will deviate significantly from the actual situation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art by providing a method for calculating the cumulative amount of C-14 in crops during a short-term release of nuclear facilities. This method can accurately assess the C-14 dose in surrounding crops during a short-term release of nuclear facilities. The present invention also provides a corresponding device for calculating the cumulative amount of C-14 in crops during a short-term release of nuclear facilities.

[0006] The technical solution adopted to solve the technical problem of this invention is:

[0007] This invention provides a method for calculating the cumulative amount of C-14 in crops during a short-term release from a nuclear facility, comprising:

[0008] During the short-term release from the nuclear facility, the dry weight change curves of crops around the nuclear power plant were obtained, and the C-14 concentration in the crop growth environment around the nuclear power plant was obtained as a function of time.

[0009] Based on the dry weight variation curves of crops around the nuclear power plant and the function of C-14 concentration over time in the crop growth environment around the nuclear power plant, the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility was calculated.

[0010] The cumulative amount of C-14 in crops around the nuclear power plant during the short-term release of the nuclear facility is calculated based on the growth rate of C-14 accumulation in crops during the short-term release of the nuclear facility.

[0011] Optionally, the growth rate of C-14 accumulation in crops surrounding the nuclear power plant during the short-term release period of the nuclear facility can be calculated according to equation (1).

[0012]

[0013] in, The value is a function of the C-14 concentration in the crop growth environment surrounding the nuclear power plant as a function of time.

[0014] Carbon content in the air, g / m³ 3 ,

[0015] The stable carbon concentration of the crop is given in gC / kg.

[0016] dW(t) is the curve showing the change in dry weight of crops around the nuclear power plant.

[0017] Optionally, the cumulative amount of C-14 in crops around the nuclear power plant caused by short-term releases from the nuclear facility can be calculated according to equation (2).

[0018]

[0019] The short-term release period of the nuclear facility is [t1, t2].

[0020] Optionally, during a short-term release of nuclear power from a facility due to a predicted or actual operational event, accident, or other event, environmental data, including meteorological and geographical data, of the surrounding crop growing environment is acquired. This data, combined with emission source terms from the short-term release, is used to calculate the spatiotemporal distribution function of the radionuclide. Then, based on this spatiotemporal distribution function, a function of the C-14 concentration over time in the surrounding crop growing environment is obtained.

[0021] During the short-term release of nuclear facilities due to actual operational events or accidents, a function of the C-14 concentration in the surrounding crop growth environment is obtained based on the real-time monitoring results of the C-14 concentration.

[0022] The present invention also provides a device for calculating the accumulation of C-14 in crops during a short-term release from a nuclear facility, comprising:

[0023] The acquisition module is used to acquire the dry weight change curve of crops around the nuclear power plant during the short-term release of nuclear energy from the nuclear facility, and to acquire the function of C-14 concentration change over time in the growing environment of crops around the nuclear power plant.

[0024] The first calculation module, connected to the acquisition module, is used to calculate the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility, based on the dry weight change curve of crops around the nuclear power plant and the function of C-14 concentration over time in the growing environment of crops around the nuclear power plant.

[0025] The second calculation module, connected to the first calculation module, is used to calculate the cumulative amount of C-14 in crops during the short-term release period of the nuclear power plant, based on the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility.

[0026] Optionally, the first calculation module calculates the growth rate of C-14 accumulation in crops surrounding the nuclear power plant during the short-term release period of the nuclear facility according to equation (1).

[0027]

[0028] in, The value is a function of the C-14 concentration in the crop growth environment surrounding the nuclear power plant as a function of time.

[0029] Carbon content in the air, g / m³ 3 ,

[0030] The stable carbon concentration of the crop is given in gC / kg.

[0031] dW(t) is the curve showing the change in dry weight of crops around the nuclear power plant.

[0032] Optionally, the second calculation module calculates the cumulative amount of C-14 in crops around the nuclear power plant caused by short-term releases from the nuclear facility according to equation (2).

[0033]

[0034] The short-term release period of the nuclear facility is [t1, t2].

[0035] Optionally, the acquisition module includes a first acquisition submodule and a second acquisition submodule.

[0036] The first acquisition submodule is used to acquire the dry weight change curves of crops around the nuclear power plant during the short-term release of nuclear facilities.

[0037] The second acquisition submodule is used to acquire a function of the change in C-14 concentration over time in the crop growing environment around the nuclear power plant during a short-term release from the nuclear facility.

[0038] Optionally, the second acquisition submodule includes an acquisition unit, a first calculation unit, and a second calculation unit.

[0039] The acquisition unit is used to acquire environmental data, including meteorological and geographical data, of the surrounding crop growth environment during short-term releases of nuclear power plants caused by anticipated operational events, accident predictions, or actual occurrences of such events.

[0040] The first calculation unit is electrically connected to the acquisition unit and is used to calculate the spatiotemporal distribution function of radionuclides based on environmental data of the crop growth environment around the nuclear power plant and in combination with emission source terms of short-term nuclear facilities.

[0041] The second computing unit is electrically connected to the first computing unit and is used to obtain the function of C-14 concentration changing with time in the crop growth environment around the nuclear power plant based on the spatiotemporal distribution function of the radionuclide.

[0042] Optionally, the second acquisition submodule is used to acquire, based on the real-time monitoring results of the C-14 concentration in the crop growth environment around the nuclear power plant, a function of the C-14 concentration changing over time during a short-term release of nuclear facilities caused by an actual operational event or accident.

[0043] This invention, by introducing plant growth curves and combining them with calculations or monitoring results of C-14 concentration in the air environment where crops grow during predicted operational events, accident scenarios, or actual occurrences, can more accurately calculate the cumulative amount of C-14 in crops under short-term emissions. Simultaneously, it enables the evaluation and rapid forecasting of the environmental impact of C-14 under short-term release conditions such as predicted operational events and accidents at nuclear facilities. It can be used for the rapid calculation and assessment of C-14 dosage and environmental impact under accident conditions, and has a very positive effect on the design, site selection, construction, and accident consequence assessment of various types of nuclear facilities in the future. Attached Figure Description

[0044] Figure 1 A flowchart illustrating the method for calculating the cumulative amount of C-14 in crops during a short-term release from a nuclear facility, as provided in Embodiment 1 of the present invention.

[0045] Figure 2 A block diagram of a device for calculating the accumulation of C-14 in crops during a short-term release of nuclear facilities, as provided in Embodiment 2 of the present invention. Detailed Implementation

[0046] The technical solutions of the invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without creative effort are within the scope of the invention.

[0047] In the description of this invention, it should be noted that the use of terms such as "above" to indicate orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings and is only for the purpose of facilitating and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0048] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," "installation," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] This invention provides a method for calculating the cumulative amount of C-14 in crops during a short-term release from a nuclear facility, comprising:

[0051] During the short-term release from the nuclear facility, the dry weight change curves of crops around the nuclear power plant were obtained, and the C-14 concentration in the crop growth environment around the nuclear power plant was obtained as a function of time.

[0052] Based on the dry weight variation curves of crops around the nuclear power plant and the function of C-14 concentration over time in the crop growth environment around the nuclear power plant, the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility was calculated.

[0053] The cumulative amount of C-14 in crops around the nuclear power plant during the short-term release of the nuclear facility is calculated based on the growth rate of C-14 accumulation in crops during the short-term release of the nuclear facility.

[0054] The present invention also provides a device for calculating the accumulation of C-14 in crops during a short-term release from a nuclear facility, comprising:

[0055] The acquisition module is used to acquire the dry weight change curve of crops around the nuclear power plant during the short-term release of nuclear energy from the nuclear facility, and to acquire the function of C-14 concentration change over time in the growing environment of crops around the nuclear power plant.

[0056] The first calculation module, connected to the acquisition module, is used to calculate the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility, based on the dry weight change curve of crops around the nuclear power plant and the function of C-14 concentration over time in the growing environment of crops around the nuclear power plant.

[0057] The second calculation module, connected to the first calculation module, is used to calculate the cumulative amount of C-14 in crops during the short-term release period of the nuclear power plant, based on the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility.

[0058] Example 1:

[0059] Environmental impact assessments are necessary for all radionuclides released during normal operation and accidental discharges from nuclear facilities. C-14, emitted in gaseous form, is a significant radionuclide emitted by nuclear facilities. It enters plants through photosynthesis as carbon dioxide and then cycles within the biosphere. Therefore, it is necessary to calculate the C-14 content in crops surrounding nuclear facilities. However, current methods for calculating C-14 content in crops primarily rely on the specific activity method, which assumes a stable C-14 concentration in the environment during normal operation of the nuclear facility. Calculations and assessments of the impact of C-14 under short-term release conditions, such as anticipated operational events or accidents, using the specific activity model will result in significant deviations from realistic scenarios. Therefore, a method is needed to calculate the C-14 content in crops under short-term release conditions from nuclear facilities, thereby enabling an accurate assessment of the dose and environmental impact of C-14 emissions.

[0060] like Figure 1 As shown in this embodiment, a method for calculating the cumulative amount of C-14 in crops during a short-term release from a nuclear facility is provided, including:

[0061] During the short-term release from the nuclear facility, the dry weight change curves of crops around the nuclear power plant were obtained, and the C-14 concentration in the crop growth environment around the nuclear power plant was obtained as a function of time.

[0062] Based on the dry weight variation curves of crops around the nuclear power plant and the function of C-14 concentration over time in the crop growth environment around the nuclear power plant, the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility was calculated.

[0063] The cumulative amount of C-14 in crops around the nuclear power plant during the short-term release of the nuclear facility is calculated based on the growth rate of C-14 accumulation in crops during the short-term release of the nuclear facility.

[0064] This invention is based on a crop growth curve model. Combined with the calculation or monitoring results of C-14 concentration in the air environment where crops grow during predicted operational events, accident conditions, or actual occurrences, it can calculate the cumulative amount of C-14 in crops when the C-14 concentration in the environment changes significantly due to the short-term release of a large amount of radionuclides from nuclear facilities. This allows for an assessment of the dose caused by C-14 and its impact on the public and the environment.

[0065] The present invention will now be described in further detail:

[0066] The first step is to collect relevant data on crops in farmland around the nuclear power plant through surveys and experiments, and then fit the data to obtain the crop dry weight variation curve W(t).

[0067] Furthermore, during short-term releases of nuclear power plant data resulting from anticipated operational events, accident predictions, or actual occurrences, environmental data, including meteorological and geographical data, of the surrounding crop growth environment is acquired. Combined with emission source terms from the short-term release, the spatiotemporal distribution function of radionuclides is calculated. Then, based on this spatiotemporal distribution function, the function number of C-14 concentration over time in the surrounding crop growth environment is obtained. or,

[0068] During short-term releases of nuclear facilities due to actual operational events or accidents, based on real-time monitoring results of C-14 concentration in the surrounding crop growing environment, a function of the C-14 concentration changing over time in the surrounding crop growing environment is obtained.

[0069] In this embodiment, we conservatively assume that the carbon in crops is not lost due to respiration and ignore the carbon loss caused by various factors during plant growth.

[0070] The second step involves analyzing the dry weight variation curve W(t) of crops around the nuclear power plant and the time-dependent C-14 concentration in the growing environment of the crops around the nuclear power plant. Calculate the growth rate of C-14 accumulation in crops surrounding nuclear power plants during short-term releases from nuclear facilities. The growth rate is calculated specifically according to formula (1).

[0071]

[0072] in, The value is a function of the C-14 concentration in the crop growth environment surrounding the nuclear power plant as a function of time.

[0073] Carbon content in the air, g / m 3 ,

[0074] The stable carbon concentration of the crop is given in gC / kg.

[0075] dW(t) is the curve showing the change in dry weight of crops around the nuclear power plant.

[0076] The third step is to analyze the growth rate of C-14 accumulation in crops surrounding the nuclear power plant during the short-term release period of the nuclear facility. The cumulative amount of C-14 in crops during the short-term release from the nuclear facility was calculated by integration. Assuming the pollution period is [t1, t2], then the cumulative amount in crops due to short-term release... Specifically, the result is calculated according to formula (2):

[0077]

[0078] The short-term release period for nuclear facilities is [t1, t2].

[0079] The present invention is further illustrated below through specific embodiments:

[0080] (1) During the site selection stage of the nuclear power plant, through preliminary investigation and experimentation on the meteorological, environmental and crop growth conditions around the nuclear power plant site, the dry weight change curve W(t) of crops in the farmland around the plant site was obtained by fitting.

[0081] In this article, taking rice as an example, the curve showing the change in the total dry weight (kg) of all rice in one mu (approximately 0.16 acres) of farmland is as follows:

[0082]

[0083] Where t=0 is the moment when rice sowing begins, and t is in hours.

[0084] (2) There are two ways to obtain the C-14 concentration in the rice growing environment.

[0085] First, based on meteorological and geographical data of the plant site area, and combined with emission source terms at the time of the accident, the spatiotemporal distribution function of radionuclides was calculated, and then the C-14 concentration in the rice growing environment was calculated.

[0086] Secondly, the real-time concentration of C-14 was obtained based on real-time monitoring results near rice-growing farmland.

[0087] In this case study, it is assumed that hourly monitoring of farmland reveals that, starting from 00:00 on the 49th day after rice sowing, the C-14 concentration in the growing environment begins to increase rapidly in a linear function, reaching a peak of 24,000 Bq / m³ at 00:00 on the 50th day. 3 The concentration then linearly decreased until it returned to background levels at 00:00 on the 51st day. This means the pollution of rice caused by the short-term release from the nuclear power plant lasted for a total of 48 hours, specifically t1 and t2 in formula ②, which are 1176h and 1224h respectively. It is assumed that the stable carbon concentration in the environment during the pollution period... 0.2g / m 3 Stable carbon content in rice The growth rate of C-14 accumulation in rice can be calculated using formula ①, given a C-14 concentration of 10 g / kg.

[0088] (3) According to formula ②, the cumulative amount of C-14 in all rice paddies around the plant site caused by the short-term release of C-14 from the nuclear power plant can be calculated to be 2.02 × 10⁻⁶. 7 Bq.

[0089] Example 2:

[0090] like Figure 2 As shown, this embodiment provides a device for calculating the cumulative amount of C-14 in crops during a short-term release from a nuclear facility, comprising:

[0091] Module 1 is used to acquire the dry weight change curve of crops around the nuclear power plant during the short-term release of nuclear energy from the nuclear facility, and to acquire the function of C-14 concentration changing over time in the growing environment of crops around the nuclear power plant.

[0092] The first calculation module 2, connected to the acquisition module 1, is used to calculate the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility, based on the dry weight change curve of crops around the nuclear power plant and the function of C-14 concentration over time in the growing environment of crops around the nuclear power plant.

[0093] The second calculation module 3, connected to the first calculation module 2, is used to calculate the cumulative amount of C-14 in crops during the short-term release period of the nuclear power plant, based on the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility.

[0094] In this embodiment, the first calculation module calculates the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility according to formula (1).

[0095]

[0096] in, The value is a function of the C-14 concentration in the crop growth environment surrounding the nuclear power plant as a function of time.

[0097] Carbon content in the air, g / m 3 ,

[0098] The stable carbon concentration of the crop is given in gC / kg.

[0099] dW(t) is the curve showing the change in dry weight of crops around the nuclear power plant.

[0100] In this embodiment, the second calculation module calculates the cumulative amount of C-14 in crops around the nuclear power plant caused by the short-term release of nuclear facilities according to formula (2).

[0101]

[0102] The short-term release period of the nuclear facility is [t1, t2].

[0103] In this embodiment, the acquisition module 1 includes a first acquisition submodule 11 and a second acquisition submodule 12.

[0104] The first acquisition submodule 11 is used to acquire the dry weight change curve of crops around the nuclear power plant during the short-term release of nuclear facilities.

[0105] The second acquisition submodule 12 is used to acquire a function of the change of C-14 concentration over time in the crop growth environment around the nuclear power plant during the short-term release of nuclear facilities.

[0106] In this embodiment, the second acquisition submodule 12 includes an acquisition unit 121, a first calculation unit 122, and a second calculation unit 123.

[0107] The acquisition unit 121 is used to acquire environmental data, including meteorological and geographical data, of the surrounding crop growth environment during short-term releases of nuclear facilities caused by anticipated operational events, accident predictions, or actual occurrences of such events.

[0108] The first calculation unit 122 is electrically connected to the acquisition unit 121 and is used to calculate the spatiotemporal distribution function of radionuclides based on environmental data of the crop growth environment around the nuclear power plant and in combination with emission source terms of short-term nuclear facilities.

[0109] The second calculation unit 123 is electrically connected to the first calculation unit 122 and is used to obtain the function of C-14 concentration changing with time in the crop growth environment around the nuclear power plant based on the spatiotemporal distribution function of the radionuclide.

[0110] In other embodiments, the second acquisition submodule may be used to acquire a function of the C-14 concentration in the surrounding crop growth environment of the nuclear power plant as a function of time, based on the real-time monitoring results of the C-14 concentration in the surrounding crop growth environment of the nuclear power plant during a short-term release of nuclear facilities caused by an actual operational event or accident.

[0111] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method for calculating the cumulative amount of C-14 in crops during a short-term release from a nuclear facility, characterized in that, include: During the short-term release from the nuclear facility, the dry weight change curves of crops around the nuclear power plant were obtained, and the C-14 concentration in the crop growth environment around the nuclear power plant was obtained as a function of time. Based on the dry weight variation curves of crops around the nuclear power plant and the function of C-14 concentration over time in the crop growth environment around the nuclear power plant, the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility was calculated. The cumulative amount of C-14 in crops around the nuclear power plant during the short-term release of the nuclear facility is calculated based on the growth rate of C-14 accumulation in crops during the short-term release of the nuclear facility. The growth rate of C-14 accumulation in crops surrounding nuclear power plants during the short-term release period of nuclear facilities is calculated according to formula (1). : （1） in, The value is a function of the C-14 concentration in the crop growth environment surrounding the nuclear power plant as a function of time. Carbon content in the air, g / m³ 3 , The stable carbon concentration of the crop is given in gC / kg. This is a curve showing the change in dry weight of crops around the nuclear power plant. Calculate the C-14 accumulation of crops around the nuclear power plant caused by short-term releases from the nuclear facility according to formula (2). : （2） The short-term release period of the nuclear facility is [t1, t2].

2. The method for calculating the cumulative amount of C-14 in crops during a short-term release from a nuclear facility according to claim 1, characterized in that, During short-term releases of nuclear power plant data resulting from anticipated operational events, predicted accident conditions, or actual occurrences, environmental data, including meteorological and geographical data, of the surrounding crop growth environment is acquired. Combined with emission source terms from the short-term release, the spatiotemporal distribution function of radionuclides is calculated. Then, based on this spatiotemporal distribution function, a function of C-14 concentration over time in the surrounding crop growth environment is obtained. During the short-term release of nuclear facilities due to actual operational events or accidents, a function of the C-14 concentration in the surrounding crop growth environment is obtained based on the real-time monitoring results of the C-14 concentration.

3. A device for calculating the accumulation of C-14 in crops during a short-term release from a nuclear facility, characterized in that, include: The acquisition module is used to acquire the dry weight change curve of crops around the nuclear power plant during the short-term release of nuclear energy from the nuclear facility, and to acquire the function of C-14 concentration change over time in the growing environment of crops around the nuclear power plant. The first calculation module, connected to the acquisition module, is used to calculate the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility, based on the dry weight change curve of crops around the nuclear power plant and the function of C-14 concentration over time in the growing environment of crops around the nuclear power plant. The second calculation module, connected to the first calculation module, is used to calculate the cumulative amount of C-14 in crops during the short-term release of nuclear power facilities based on the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release of nuclear power facilities. The first calculation module calculates the growth rate of C-14 accumulation in crops around the nuclear power plant during the short-term release period of the nuclear facility according to equation (1). : （1） in, The value is a function of the C-14 concentration in the crop growth environment surrounding the nuclear power plant as a function of time. Carbon content in the air, g / m³ 3 , The stable carbon concentration of the crop is given in gC / kg. This is a curve showing the change in dry weight of crops around the nuclear power plant. The second calculation module calculates the cumulative amount of C-14 in crops around the nuclear power plant caused by the short-term release of nuclear energy from the nuclear facility according to formula (2). : （2） The short-term release period of the nuclear facility is [t1, t2].

4. The apparatus for calculating the accumulation of C-14 in crops during a short-term release from a nuclear facility according to claim 3, characterized in that, The acquisition module includes a first acquisition submodule and a second acquisition submodule. The first acquisition submodule is used to acquire the dry weight change curves of crops around the nuclear power plant during the short-term release of nuclear facilities. The second acquisition submodule is used to acquire a function of the change in C-14 concentration over time in the crop growing environment around the nuclear power plant during a short-term release from the nuclear facility.

5. The apparatus for calculating the accumulation of C-14 in crops during a short-term release from a nuclear facility according to claim 4, characterized in that, The second acquisition submodule includes an acquisition unit, a first calculation unit, and a second calculation unit. The acquisition unit is used to acquire environmental data, including meteorological and geographical data, of the surrounding crop growth environment during short-term releases of nuclear power plants caused by anticipated operational events, accident predictions, or actual occurrences of such events. The first calculation unit is electrically connected to the acquisition unit and is used to calculate the spatiotemporal distribution function of radionuclides based on environmental data of the crop growth environment around the nuclear power plant and in combination with emission source terms of short-term nuclear facilities. The second computing unit is electrically connected to the first computing unit and is used to obtain the function of C-14 concentration changing with time in the crop growth environment around the nuclear power plant based on the spatiotemporal distribution function of the radionuclide.

6. The apparatus for calculating the accumulation of C-14 in crops during a short-term release from a nuclear facility according to claim 4, characterized in that, The second acquisition submodule is used to acquire, based on the real-time monitoring results of the C-14 concentration in the crop growth environment around the nuclear power plant, a function of the C-14 concentration changing over time during a short-term release of nuclear facilities caused by an actual operational event or accident.

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