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Nuclear Terrorist Incident Risk Assessment Methods And Properties Of Spent Fuel Characteristics

Posted on:2007-10-25Degree:DoctorType:Dissertation
Country:ChinaCandidate:S B ZhangFull Text:PDF
GTID:1112360212960757Subject:Particle Physics and Nuclear Physics
Abstract/Summary:PDF Full Text Request
Nuclear terrorism is one of the grave threats to the national security. Nuclear materials and radioactive materials could be both used to make nuclear terror events by terrorists groups or terrorists. For these reasons, it is very important to analyze the risks of nuclear materials and radioactive materials and develop a method to distinguish reactor characteristics of nuclear spent fuel for the security of these materials.The threats to the security from nuclear and radiological terrorism are grouped into the following four categories: theft or purchase and use nuclear explosive device, obtaining nuclear materials for use in an improvised nuclear explosive device, attacking on nuclear facilities, exploiting radioactive materials to make radiological disperse devices such as "dirty bomb"-a conventional explosive coupled with radioactive material-and other devices to release radiation. To assess the risks of the four faces of nuclear and radiological terrorism, the event-tree and probabilistic risk analyzing method are used to analyze their relative probabilities, because there are not any nuclear terrorism events happened, some hypothetical data and related statistical data are used to illustrate the processing of this method. As illustrated in a specific case, the probabilistic risk analyzing method could be used to assess the relative risk of nuclear and radiological terror events. These assessments could be a reference for setting priorities to allocate resources to counter nuclear terrorism, even to enhance the securities of nuclear materials and radioactive materials.As shown by the some assessments, public should pay attention to the security of radioactive sources and spent fuel. It might be helpful for the security of spent fuel to build a method to investigate its' sources by analyzing the characteristics of spent fuel.Firstly, in order to develop a numerical method to simulate the nuclide components of spent fuel, Benchmark test are carried out to verify and validate the MCCOOR code system, which is a 3-D burnup calculation code. The result shows that the MCCOOR code is reliable, through improving capabilities of the MCCOOR code for simulation the nuclides components vs. the cooling-time, the MCCOOR code could be used to...
Keywords/Search Tags:nuclear terrorism, risk assessment, radioactive source, spent fuel, nuclear reactor, nuclides components, isotopic correlated technique
PDF Full Text Request
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