首页> 外文OA文献 >Implementation of vented fuel assemblies in the supercritical CO₂-cooled fast reactor
【2h】

Implementation of vented fuel assemblies in the supercritical CO₂-cooled fast reactor

机译:在超临界CO 2冷却快堆中实施通风燃料组件

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。
获取外文期刊封面目录资料

摘要

Analysis has been undertaken to investigate the utilization of fuel assembly venting in the reference design of the gas-cooled fast reactor under study as part of the larger research effort at MIT under Gen-IV NERI Project No. 05-044, "Optimized Competitive Supercritical-CO₂ Cycle GFR for Gen-IV Service." The focus of this work is on selection and optimization of a fuel assembly configuration best suited for venting, assessment of the radionuclide release of such an assembly design, and identification of plant systems which must be altered in order to support fuel venting. The innovative tube-in-duct design of the reference GFR fuel assembly is particularly well suited to venting, allowing fission products to diffuse into a common header before being routed along a vent path and eventually being released to the primary coolant system. A set of equations were developed which model the transport of fission products from fuel to vent path to primary coolant inventory and then into the containment atmosphere, with emphasis on conservatism in calculations of coolant impurity levels. Using these equations in a computer code, the lengthy list of radioactive and chemically volatile fission products for study was reduced to only fifteen species of any great concern. Of these, 85Kr and 137Cs were considered conservative bounding cases on the behavior of the other nuclides. The chemistry of the fission products released to the coolant was explored. In particular, reactions between fission products and their surroundings were identified, and estimates of deposition of both compounds and free atoms on steel surfaces were made. Investigation of reactions between fission products and CO₂ revealed that the formation of stable oxides would lead to deposition of most volatile species within the fuel assembly's debris trap.
机译:麻省理工学院根据Gen-IV NERI项目No. 05-044“优化的竞争性超临界”的大型研究工作的一部分,已经进行了分析,以研究燃料冷却装置在气冷快堆参考设计中的利用情况。 -CO²第四代服务的GFR循环。”这项工作的重点是选择和优化最适合排气的燃料组件配置,评估这种组件设计的放射性核素释放以及确定必须更改以支持燃料排气的工厂系统。参考GFR燃料组件的创新型导管设计特别适合排气,允许裂变产物在沿着排气路径进入并最终释放到主冷却剂系统之前,扩散到公共集管中。建立了一组方程,该方程对裂变产物从燃料到排气路径到一次冷却剂存量再到安全壳大气中的传输进行建模,并在计算冷却剂杂质水平时着重于保守性。在计算机代码中使用这些方程式,用于研究的放射性和化学挥发性裂变产物的冗长清单减少到只有15种令人关注的物种。其中,85 Kr和137 Cs被认为是其他核素行为的保守边界。探索了释放到冷却剂中的裂变产物的化学性质。特别是,确定了裂变产物与其周围环境之间的反应,并对化合物和自由原子在钢表面的沉积进行了估算。对裂变产物和CO 2之间的反应进行的研究表明,形成稳定的氧化物会导致大多数易挥发物质沉积在燃料组件的碎屑捕集器中。

著录项

  • 作者

    McKee Stephanie A;

  • 作者单位
  • 年度 2008
  • 总页数
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号