Operation of HTTR

Grand challenges in advanced nuclear reactor design

“…It is a graphite-moderated, helium-cooled reactor with a thermal neutron spectrum (Agency, 2014). The reactor core type of the VHTR can be a prismatic block core such as the Japanese HTTR (Fukaya et al, 2021), or a pebblebed core such as the Chinese HTR-10 ( Mao et al, 2022). While the original approach for VHTR at the start of the Generation IV program focused on very high outlet temperatures and hydrogen production, current market assessments have indicated that electricity production and industrial processes based on hightemperature steam that requires modest outlet temperatures (700-850 °C) have the greatest potential for application in the next decade and also reduce the technical risk associated with higher outlet temperatures.…”