Irradiation creep induced nano-/microstructure and property changes in nuclear graphite

全球100多座核反应堆已采用核石墨作为慢化剂和结构部件，预计它们还将用于新一代第四代高温反应堆(HTR)。辐照蠕变是石墨在辐照下的三大性能之一，但由于其辐照试验要求极其复杂和耗时，实验数据量最少。到目前为止，只有三种等级的石墨的辐照蠕变数据：德国ATR-2E(高达200x1020n-cm2)，英国PGA和英国Gilocarbon(高达60x1020n-cm2)。在这个项目中，博士生将有机会接触到宝贵的中子辐照蠕变GisloCarbon石墨样品(在5年的重点项目中辐照，并有大量的PIE检验数据可用)，以了解辐照蠕变引起的微/纳米结构变化，以支持在国际高温气冷堆中使用新的石墨。

Nuclear graphite has been employed as a moderator and structural components in more than 100 nuclear reactors worldwide and they are also projected to use in new Generation IV high-temperature reactors (HTRs). Irradiation-induced creep, among one of the three most important properties of graphite under irradiation, has the least amount of experimental data due to its extremely complex and time-consuming requirements for irradiation tests. So far there are only irradiation creep data on three types of graphite grades: German ATR-2E (up to 200x1020 n-cm2), UK PGA and UK Gilsocarbon (up to 60x1020 n-cm2). In this project, the PhD student will have access to the precious neutron irradiated crept Gislocarbon graphite samples (irradiated in the 5-year ACCENT project and have extensive bulk PIE examination data available) to understand the irradiation creep-induced micro-/nano-structural changes before turnaround, to support the use of new graphites in HTRs internationally.