熔盐堆作为第四代先进核能系统,具有在线处理和利用钍燃料等各种优势。我们主要参考法国国家科学研究院(Centre National de la Recherche Scientifique,CNRS)的相关研究,该单位对熔盐堆堆芯结构进行优化,提高其钍铀转换率。利用SCALE(S...熔盐堆作为第四代先进核能系统,具有在线处理和利用钍燃料等各种优势。我们主要参考法国国家科学研究院(Centre National de la Recherche Scientifique,CNRS)的相关研究,该单位对熔盐堆堆芯结构进行优化,提高其钍铀转换率。利用SCALE(Standardized Computer Analyses for Licensing Evaluation)大型蒙特卡洛程序针对超热中子谱熔盐堆进行堆芯结构优化。从计算数据分析,Blanket增殖区在堆芯的不同位置可以提高Blanket中的钍铀增殖率,但是并不能提高整个堆芯的钍铀增殖率。对于超热谱的熔盐堆,单熔盐石墨孔道可以提供CNRS设计几乎相当的钍铀增殖率,同时可以极大地降低慢化剂石墨内的中子通量水平,延长更换堆芯石墨周期,提高整个熔盐堆的运行经济性。展开更多
In this study,the gamma-ray spectrum of single elemental capture spectrum log was simulated.By numerical simulation we obtain a single-element neutron capture gamma spectrum.The neutron and photon transportable proces...In this study,the gamma-ray spectrum of single elemental capture spectrum log was simulated.By numerical simulation we obtain a single-element neutron capture gamma spectrum.The neutron and photon transportable processes were simulated using the Monte Carlo N-Particle Transport Code System(MCNP),where an Am–Be neutron source generated the neutrons and thermal neutron capture reactions with the stratigraphic elements.The characteristic gamma rays and the standard gamma spectra were recorded,from analyzing of the characteristic spectra analysis we obtain the ten elements in the stratum,such as Si,Ca,Fe,S,Ti,Al,K,Na,Cl,and Ba.Comparing with single elemental capture gamma spectrum of Schlumberger,the simulated characteristic peak and the spectral change results are in good agreement with Schlumberger.The characteristic peak positions observed also consistent with the data obtained from the National Nuclear Data Center of the International Atomic Energy Agency.The neutron gamma spectrum results calculated using this simple method have practical applications.They also serve as an reference for data processing using other types of element logging tools.展开更多
文摘熔盐堆作为第四代先进核能系统,具有在线处理和利用钍燃料等各种优势。我们主要参考法国国家科学研究院(Centre National de la Recherche Scientifique,CNRS)的相关研究,该单位对熔盐堆堆芯结构进行优化,提高其钍铀转换率。利用SCALE(Standardized Computer Analyses for Licensing Evaluation)大型蒙特卡洛程序针对超热中子谱熔盐堆进行堆芯结构优化。从计算数据分析,Blanket增殖区在堆芯的不同位置可以提高Blanket中的钍铀增殖率,但是并不能提高整个堆芯的钍铀增殖率。对于超热谱的熔盐堆,单熔盐石墨孔道可以提供CNRS设计几乎相当的钍铀增殖率,同时可以极大地降低慢化剂石墨内的中子通量水平,延长更换堆芯石墨周期,提高整个熔盐堆的运行经济性。
基金supported by The National S&T Major Special Project(No.2011ZX05020-008)
文摘In this study,the gamma-ray spectrum of single elemental capture spectrum log was simulated.By numerical simulation we obtain a single-element neutron capture gamma spectrum.The neutron and photon transportable processes were simulated using the Monte Carlo N-Particle Transport Code System(MCNP),where an Am–Be neutron source generated the neutrons and thermal neutron capture reactions with the stratigraphic elements.The characteristic gamma rays and the standard gamma spectra were recorded,from analyzing of the characteristic spectra analysis we obtain the ten elements in the stratum,such as Si,Ca,Fe,S,Ti,Al,K,Na,Cl,and Ba.Comparing with single elemental capture gamma spectrum of Schlumberger,the simulated characteristic peak and the spectral change results are in good agreement with Schlumberger.The characteristic peak positions observed also consistent with the data obtained from the National Nuclear Data Center of the International Atomic Energy Agency.The neutron gamma spectrum results calculated using this simple method have practical applications.They also serve as an reference for data processing using other types of element logging tools.
