Nuclear reactor with main and auxiliary coolant circuits - with auxiliary circuit connected to separate source of cleaning appts.

摘要

Nuclear reactor comprises a main coolant circuit which includes the core, a heat exchanger and a coolant circulating device, and an auxiliary coolant circuit which passes over other reactor components. The auxiliary circuit is connected at one end to the main circuit, and at the other end either to a separate coolant source or to the main circuit via a coolant cleaning appts. One end of the auxiliary circuit may be connected to the main circuit at a point downstream of the core, and the other end connected to the main circuit via cleaning appts. at a point upstream of the core, or vice versa. The core is pref. free from graphite while the other components contain graphite, and the heat exchanger exchanges heat between coolant and water while the cleaning appts. removes water from the coolant.