Effect of nonuniform isoflux heating on natural convection heat transfer in a prismatic modular reactor

A review and safety aspects of modularhigh‐temperature gas‐cooledreactors

“…Here, PCC is initiated by the loss of flow with failure of a single train of PCC, as the HTTF RCCS is comprised of eight water cooling sections, where each section is considered as single train, each section is fed by its inlet and outlet valve piping system when one train is lost, this initiates the PCC event. Many studies have been conducted to computationally and experimentally investigate the natural convection heat transfer and gaseous dynamics during PCC event in a scaled‐down module of very‐high temperature reactor literature 41,44‐56 …”

“…The oxygen in the air oxidizes the graphite structure in the moderator and reflector and components within the vessel, and to the fuel particles (Tristructural‐isotropic), and degrades structural integrity of the internal pressure vessel structure and the core through a chemical reaction with oxygen, this can lead to accumulation of explosive co in the reactor and can lead to damage. In addition to, the Air ingress events are categorized as low probability events 41,43‐45,59‐64 presented an example for simulation and Investigation of air ingress scenario simulation for modular HTGR under different operating conditions and oxidation of graphite by oxygen.…”