Abstract

An integrated safety design and radionuclide (RN) retention strategy is developed to support the Transformational Challenge Reactor (TCR) demonstration. This demonstration aims to showcase viability for rapid deployment of a novel reactor by leveraging the advances in materials, manufacturing, and computational sciences through a highly integrated and agile design and development approach. This strategy provides a logical description and understanding of how RNs are contained within the facility. Rather than discussing fission product barriers individually between separate design and safety basis reports, this paper provides a consistent description and narrative to better facilitate regulatory interactions and focus safety design efforts. The principal barriers credited include the various coating layers in the tristructural isotropic (TRISO) fuel particle, the silicon carbide (SiC) matrix hosting the particles within the fuel element, the helium pressure boundary, and the confinement system. The choice and assumed performance of the credited barriers are highly conservative, which is a direct reflection of the low hazard that the TCR demonstration presents and the need to simplify and focus the safety review process accordingly. However, the strategy and the associated framework are generalized and may be adopted and tailored to support other advanced reactor demonstration efforts.

摘要

开发了一种集成的安全设计和放射性核素 (RN) 保留策略，以支持转型挑战反应堆 (TCR) 演示。该演示旨在通过高度集成和敏捷的设计和开发方法，利用材料、制造和计算科学方面的进步，展示快速部署新型反应堆的可行性。该策略提供了对 RN 如何包含在设施内的逻辑描述和理解。本文不是在单独的设计和安全基础报告之间单独讨论裂变产物障碍，而是提供一致的描述和叙述，以更好地促进监管互动并集中安全设计工作。主要障碍包括三结构各向同性 (TRISO) 燃料颗粒中的各种涂层、容纳燃料元件内颗粒的碳化硅 (SiC) 基体、氦压力边界和限制系统。信用屏障的选择和假设性能是高度保守的，这直接反映了 TCR 演示所呈现的低危险以及相应地简化和集中安全审查过程的必要性。但是，该战略和相关框架是通用的，可以采用和调整以支持其他先进反应堆示范工作。信用屏障的选择和假定性能是高度保守的，这直接反映了 TCR 演示所呈现的低危险性以及相应地简化和集中安全审查过程的必要性。但是，该战略和相关框架是通用的，可以采用和调整以支持其他先进反应堆示范工作。信用屏障的选择和假设性能是高度保守的，这直接反映了 TCR 演示所呈现的低危险以及相应地简化和集中安全审查过程的必要性。但是，该战略和相关框架是通用的，可以采用和调整以支持其他先进反应堆示范工作。