System for creating gas-flow field database and system for predicting diffusion state of diffusion material

An airflow field and database technology, applied in the system field of creating an airflow field database, can solve the problems of cost, diffusion field data for a long time, a lot of time, etc., and achieve the effect of reducing the calculation load

Inactive Publication Date: 2011-10-12
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, with the above-mentioned conventional techniques, it takes a lot of time to calculate the air f

Method used

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  • System for creating gas-flow field database and system for predicting diffusion state of diffusion material
  • System for creating gas-flow field database and system for predicting diffusion state of diffusion material
  • System for creating gas-flow field database and system for predicting diffusion state of diffusion material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079]

[0080] First, a first example of the air flow field database creation system will be described.

[0081] like figure 1 As shown, the first airflow field database creation system 100 includes a long-term wide-area airflow field data calculation unit 101, an atmospheric stability calculation / addition unit 102, a wind direction-based / atmospheric stability-based classification unit 103, and a wind direction-based / atmospheric stability-based classification unit 103. degree airflow field database creation unit 104.

[0082] The airflow field database creation system 100 creates a wind direction-based / atmospheric stability-based airflow field database based on the global weather reanalysis data G obtained from the global weather reanalysis database 50 .

[0083] The global weather reanalysis database 50 has global weather reanalysis data as long-term wide-area actual weather data on a global scale, and has, for example, hourly weather data of the past 50 to 100 years, th...

Embodiment 2

[0125]

[0126] Next, a second example of the airflow field database creation system is described.

[0127] like Figure 11 As shown, the second airflow field database creation system 200 includes a calculation condition input unit 201 , a stable airflow calculation unit 202 , and a wind direction-based / atmospheric stability-based classification unit 203 .

[0128] The calculation condition input unit 201 is set with air temperature vertical distribution data (such as Figure 12 shown) and vertical distribution data of wind speed classified according to atmospheric stability (S1, S2, S3) (such as Figure 13 shown).

[0129] Atmospheric stability S1 represents an unstable state, atmospheric stability S2 represents a neutral state, and atmospheric stability S3 represents a stable state.

[0130] The calculation condition input unit 201 inputs corresponding calculation conditions for 48 cases covering different combinations of wind directions (16 directions) and atmospheric st...

Embodiment 3

[0150]

[0151] Next, refer to Figure 15 A diffusion state prediction system for diffusing substances according to Embodiment 3 of the present invention will be described.

[0152] like Figure 15 As shown, the storage unit 110 stores as Figure 9 The airflow field database shown (referred to as the airflow field database DB101 ), the airflow field database is obtained by the airflow field database creation system 100 of the first embodiment.

[0153] The airflow field data calculation unit 111 receives the weather data α at the target date and time from the weather data input unit 112 as input. The object date and time refer to the date and time when diffused substances (for example, radioactive substances) are discharged into the atmosphere from a diffused source (for example, a nuclear power plant). The meteorological data α has any of 16 wind direction, wind speed, air temperature, humidity, precipitation, air pressure, etc. elements as data elements.

[0154] The a...

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Abstract

A long-term wide-area gas-flow field data operation unit (101) obtains hourly gas-flow field data of one year by an RAMS or the like by using weather data of global weather reanalysis data (G) as the entrance boundary condition for the computational region. An atmospheric stability calculation/addition unit (102) obtains the stabilities of the representative gas-flow field data of the respective gas-flow field data and adds the obtained stabilities to the respective gas-flow field data. A wind direction-based/atmospheric stability-based classification unit (103) classifies the respective gas-flow field data into cases with different combinations of wind directions and atmospheric stabilities. A wind direction-based/atmospheric stability-based gas-flow field database creation unit (104) selects gas-flow field data that are representative of the respective cases and associates the selected representative gas-flow field data with the respective cases with the different combinations of wind directions and atmospheric stabilities, thereby creating a high-precision gas-flow field database at reduced operation load.

Description

technical field [0001] The present invention relates to a system for creating an airflow field database and a system for predicting the diffusion status of diffusive substances, the system is designed to be able to obtain an accurate airflow field database with a reduced computational load, and to accurately and rapidly predict Diffusion status of the diffusing substance. Background technique [0002] The diffusion status prediction method is being developed, and if the radioactive material is released outside (into the atmosphere) from the facility that handles the radioactive material in an accident, the diffusion status prediction method does not affect the spread range of the radioactive material and the radioactivity at each site or location. Concentrations of substances are predicted to predict areas that may be endangered by radioactive substances. [0003] This diffusion state prediction method can be applied not only to the prediction of the diffusion state of radi...

Claims

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Application Information

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IPC IPC(8): G01W1/00G06Q10/00G06Q10/04
CPCG01W1/00G06Q10/06
Inventor 大场良二米田次郎
Owner MITSUBISHI HEAVY IND LTD
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