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RISS 인기검색어
- 검색키워드
- 저자 : Seyed Farhad Masoudi (검색결과 2 건)
- 무료
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Neutronic analysis of control rod effect on safety parameters in Tehran Research Reactor
Mina Torabi,A. Lashkari,Seyed Farhad Masoudi,Somayeh Bagheri 한국원자력학회 2018 Nuclear Engineering and Technology Vol.50 No.7
The measurement and calculation of neutronic parameters in nuclear research reactors has an importantinfluence on control and safety of the nuclear reactor. The power peaking factors, reactivity coefficientsand kinetic parameters are the most important neutronic parameter for determining the state of thereactor. The position of the control shim safety rods in the core configuration affects these parameters. The main purpose of this work is to use the MTR_PC package to evaluate the effect of the partiallyinsertion of the control rod on the neutronic parameters at the operating core of the Tehran ResearchReactor. The simulation results show that by increasing the insertion of control rods (bank) in the core,the absolute values of power peaking factor, reactivity coefficients and effective delayed neutron fractionincreased and only prompt neutron life time decreased. . In addition, the results show that the changes ofmoderator temperature coefficients value versus the control rods positions are very significant. Theaverage value of moderator temperature coefficients increase about 98% in the range of 0e70% insertionof control rod
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Effect of Different Types of Interface Roughness on Electron Conductance
Zhaleh Ebrahiminejad,Reza Sabet Dariani,Seyed Farhad Masoudi 대한금속·재료학회 2014 ELECTRONIC MATERIALS LETTERS Vol.10 No.3
This study is a theoretical investigation on transport properties of heterostructures-consisting of double rough barriers. The interfaces of barriers are presented with two different types of rough interfaces. These interfaces are produced by the pure random deposition and ballistic deposition on two-dimensional substrates. The resonant transport for two types of interfaces are studied and compared with each other. In addition, the I-V characteristic for different interface-roughness types and for different temperatures is investigated. The results illustrate that both the transmission probability and the current density depend on deposition model and interface morphology.
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