Low power pressure tube nuclear reactor

A nuclear reactor, comprising:

• a housing with a reflector, forming a reactor core including an inner space;
• first process channels, located in the reactor core, designed for coolant circulation;
• second process channels, located in the reactor core, designed for placement of control and protection system components;
• a plurality of fuel rod arrays;
• a first coolant loop;
• wherein:
• the first coolant loop comprises a supply chamber including a bottom and a discharge chamber separated from the supply chamber by a partition;
• the first process channels are designed as bayonet tubes, each said bayonet tube includes an external tube and an internal tube, each said external tube is attached to the bottom of the supply chamber, and each said internal tube is attached to the partition;
• each fuel rod array of said plurality of fuel rod arrays is installed on a suspender, inside of each corresponding said internal tube, wherein the suspender is attached to an upper part of the discharge chamber;
• the second process channels are isolated from the supply chamber and the discharge chamber;
• and the inner space of the reactor core is filled with medium or material transparent for neutrons.