【摘要】：隨著地球資源的不斷匱乏,核能源作為一種環(huán)保高產(chǎn)能能源,必將逐步成為未來研究發(fā)展的主要方向。核事故給人類帶來的災(zāi)難,讓人類對發(fā)展核能的愿望望而卻步,加強核能源安全開發(fā)利用則成為重中之重。然而,一旦發(fā)生核事故,根據(jù)污染物擴散濃度采取相應(yīng)的防護措施,保障居民的生命安全就顯得尤為重要。但在核事故早期,核事故區(qū)域放射性污染物濃度測定存在一定的困難,因此,開展放射性污染物擴散模擬研究,為核事故應(yīng)急決策提供技術(shù)支持,就顯得尤為迫切。本課題基于核電廠周圍的地理信息,大氣氣象環(huán)境,監(jiān)測子站的環(huán)境信息,應(yīng)用遺傳算法進行源型分析,實現(xiàn)核事故源強推測;同時考慮了干沉降、濕沉降、放射性衰變和風向變化等因素,對大氣擴散高斯模型進行了改進,建立了適合核電廠核事故污染擴散模擬的放射性核素污染擴散模型。在上述研究基礎(chǔ)上,應(yīng)用GIS等信息技術(shù),以遼寧紅沿河核電廠為例,設(shè)計實現(xiàn)了核電廠核事故放射性污染擴散模擬系統(tǒng)。該系統(tǒng)具有核事故源項分析、放射性核素污染擴散模擬、以及污染擴散結(jié)果的可視化查詢等功能,可以為核電廠核事故應(yīng)急決策提供技術(shù)支持。
[Abstract]:With the continuous scarcity of earth resources, nuclear energy, as a kind of environmental protection and high productivity energy, will gradually become the main direction of future research and development. The disaster caused by nuclear accident has deterred mankind from developing nuclear energy, and strengthening the safe development and utilization of nuclear energy has become the top priority. However, in the event of a nuclear accident, it is very important to take corresponding protective measures according to the concentration of pollutant diffusion to ensure the safety of residents. However, in the early stage of nuclear accident, it is difficult to measure the concentration of radioactive pollutant in the area of nuclear accident. Therefore, it is urgent to carry out the simulation study of radioactive pollutant diffusion to provide technical support for the emergency decision of nuclear accident. Based on the geographical information of nuclear power plant, the atmospheric meteorological environment, the monitoring of the environmental information of sub-station, the genetic algorithm is used to analyze the source type to realize the source estimation of nuclear accident. Considering the factors of dry deposition, wet deposition, radioactive decay and wind direction change, the Gao Si model of atmospheric diffusion is improved, and a radionuclide pollution diffusion model suitable for the simulation of nuclear accident pollution diffusion in nuclear power plant is established. On the basis of the above research, using the information technology such as GIS and taking the Hongyan River nuclear power plant in Liaoning as an example, the simulation system of radioactive pollution diffusion in nuclear power plant accident is designed and realized. The system has the functions of nuclear accident source term analysis, radionuclide contamination diffusion simulation, and visual query of pollution diffusion results. It can provide technical support for nuclear accident emergency decision in nuclear power plant.
【學位授予單位】：遼寧大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X591

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本文編號：2336730