Optimization design research for 89Sr production in China Experimental Fast Reactor.
As the first sodium cooled fast reactor in China, China Experimental Fast Reactor (CEFR) has many characteristics, such as high power rating, high neutron flux and high neutron leakage as its hard spectrum. These leakage neutrons can be used to produce 89Sr by fast neutrons (n, p) reaction. By means of some special designs, including designing optimized target assembly, choosing reasonable irradiation location and appropriate irradiation cycle length, in order to improve specific activity of 89Sr. The MNCP code was used to the calculations coupled ORIGRN2 procedure. The higher activity of 89Sr can be obtained by these optimization designs, so it is feasible to produce 89Sr in the fuel region of CEFR.
Experimental and numerical investigation of sloshing behavior in annular region separated by several cylinders related to fast reactor design
Abstract The liquid sloshing behavior analysis of reactor vessel is an important topic of sodium-cooled fast reactor design. It is known that there are two pumps and four heat exchangers immersed in sodium liquid. Although lots of research work has been performed on the liquid sloshing inside simple cylindrical tank and coaxial circular cylinders, few about sloshing inside annular region separated by several cylinders (ARSSC), this paper deals with the analysis of the liquid sloshing inside the ARSSC geometry. A simplified cylindrical tank of fast reactor was designed, in which there are six internal cylinders used to model pumps and heat exchangers. By shaking table experiments, the number of internal cylinders was gradually increased, and the natural frequency and wave height of liquid sloshing were measured under each case. In numerical investigation, the VOF models were built to record wave height using the CFD simulation approach, the conditions were consistent with experiments. Much different with previous research, the characteristics of sloshing inside ARSSC geometry were strongly dependent on the number of internal cylinders. Experiment results showed that the natural frequency and wave height all decrease with the increase of internal cylinders gradually. The wave height response obtained by numerical simulation was in good agreement with the experimental results. In addition, as the increase of internal cylinders gradually, the maximum sloshing response occurred when the forcing frequency matched high order natural frequency of sloshing. Moreover, a correction factor was obtained by experiments for the natural frequency theoretical calculation formula. The conclusions can provide favorable reference for the seismic design of the sodium-cooled fast reactor.
Beyond zero tolerance : discrimination in military culture
Chapter 1 Introduction: Rethinking Military Culture Part 2 Constructing Military Culture Chapter 3 Discrimination and Military Cohesion: An Organizational Perspective Chapter 4 Military Folk Culture Chapter 5 Dressed to Kill? The Paradox of Women in Military Uniforms Chapter 6 A Tangled Webb the Navy Can't Afford Chapter 7 Women at the U.S. Army War College Part 8 The Military, Society, and Policy Chapter 9 Reflections of Society: The Intersection of Race and Gender in the U.S. Army in World War II Chapter 10 Intersectionality: A Necessary Consideration for Women of Color in the Military? Chapter 11 In War and Peace: Incidence and Implications of Rape by Military Personnel Chapter 12 Persistence of Sexual Harassment: The Impact of Military Culture on Policy Implementation Chapter 13 A Culture of Silence: Consequences of Don't Ask, Don't Tell, Don't Pursue Chapter 14 Gender and Sexual Orientation Diversity in Modern Military Forces: Cross-National Patterns Chapter 15 Military Culture and Military Families