a nuclear reactor using water as the moderator and coolant, in which the system is maintained at a high pressure to prevent boiling. The water is circulated through a heat exchanger to generate steam in a secondary circuit, tuumareaktor, mis kasutab aeglustiks ja jahutusvedelikuks vett, mida hoitakse keemise vältimiseks rõhu all ningsee ringleb läbi tuumareaktori ja aurugeneraatori, kus selles salvestunud soojusest toodetakse auru sekundaarses kontuuris