Nuclear power plant with heat carrier cleaning system

FIELD: nuclear engineering.

SUBSTANCE: invention relates to nuclear engineering. Nuclear power plant (NPP) comprises an integral reactor with a housing and a cover, at least three heat carrier circulation circuits, intermediate (9) and process (14) heat exchangers, pipelines to feed and discharge the heat carrier from the intermediate and the process heat exchangers, shutoff valves and cleaning system (11) of alkali metal (4). Heat carrier cleaning system (11) consists of at least one membrane (4) and hydrogen and tritium receiver with the possibility of evacuation of its cavity (8) and discharge of received hydrogen and tritium from it. When selecting membrane (3) design taken into account are, first, interrelation of structural characteristics of the membrane with structural characteristics of the NPP, mass exchange characteristics of the membrane and the NPP, maximum allowable mass concentration of tritium in the product discharged from the third circuit (6); second, interrelation of mass exchange characteristics of the NPP and the maximum allowable mass concentration of tritium in the product discharged from the third circuit (6).

EFFECT: technical result is following radiation safety requirements for the product (tritium) discharged from the third circuit (6) of the NPP.

1 cl, 2 dwg

 



 

Same patents:

FIELD: heating.

SUBSTANCE: invention relates to the field of heat engineering of heavy liquid-metal coolants and can be used for research, testing workbenches and nuclear plants with fast neutron reactors. In the cooling unit in front of the pipe for supplying cooling water its flow regulator is mounted, and in front of it there is a temperature set-point device which input is connected to the output of thermotransducer mounted on the pipe of discharge of liquid-metal coolant.

EFFECT: improving the efficiency of heat exchange due to automation of the process.

2 cl, 1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to nuclear power production, particularly, to water treatment in makeup water supply to secondary coolant circuit in standby conditions. Water feed from, mainly, separator into evaporator boiler water distribution chamber and forcing it through second circulation loop evaporator tube bank in standby conditions with nuclear reactor maintained hot by proper heat comprises actuating nuclear reactor in intermittent mode during a day at low power with forcing reactor first coolant circuit liquid-metal heat carrier at low rpm of second coolant circuit makeup water pump. After said low-power actuation, water is preliminarily fed from pressure pipe via makeup water pump into evaporator boiler water distribution chamber to design water level in separator. Then, separator and evaporator water levels are leveled by separator pressure reduction After starting makeup water pump at low rpm, second coolant circuit water temperature is controlled by increasing separator pressure on feeding steam of required parameters Note here that second coolant circuit boiler water temperature increase rate is controlled by linear time ratio not exceeding 1-3 degrees centigrade a minute.

EFFECT: ruled out cyclic thermal stresses in heat exchangers.

2 dwg

Coolant pressurizer // 2303304

FIELD: nuclear, thermonuclear, and space engineering; liquid-metal cooled nuclear power plants mainly for space engineering.

SUBSTANCE: proposed coolant pressurizer has tight housing with gas space, unit for connection to coolant circuit, and gas-coolant separator capillary device hydraulically communicating with unit for connection to coolant circuit and to gas space. Pressurizer is also provided with gas check valve joined with tube whose open end is disposed in central part of pressurizer gas space. Provision is made for ground tests of pressurizer within coolant circuit under conditions close to space ones.

EFFECT: enhanced operating reliability of pressurizer and entire liquid-metal coolant circuit.

1 cl, 1 dwg

FIELD: nuclear power engineering.

SUBSTANCE: pressurizing water flow is heated prior to spraying in adjustable-power heater to temperature tcore out. < tb < ts. Partial pressure of gas in steam-gas space at reactor operating parameters is limited to Pg = (Pop - P)Kmin/K.

EFFECT: enhanced safety of reactor.

1 cl, 1 dwg

FIELD: nuclear power installations of water-moderated water-cooled type.

SUBSTANCE: proposed system designed for evacuating steam-gas mixture from primary circuit to prevent formation of critical concentration of oxygen and hydrogen at separate points of primary circuit and to avoid failure of natural circulation therein has reactor with core and steam generator with vertical "cold" and "hot" headers connected by means of horizontal heat-transfer tube bundles, main circulating pumps, first pressurizer with steam cavity communicating with top parts of vertical headers and top part of main circulating pump with pipelines incorporating shutoff valves with hydraulic actuators. Hydraulic-actuator cylinder is divided into intake and discharge working cavities; intake cavity communicates with pressure end of main circulating pump and discharge one, with its suction end; throttles are installed on pipelines interconnecting vertical "hot" headers of steam generators and vertical "cold" ones, as well as on pipelines interconnecting vertical "hot" headers and top part of main circulating pump.

EFFECT: enhanced safety and efficiency.

1 cl, 2 dwg

Steam pressurizer // 2254626

FIELD: nuclear engineering; water-moderated water-cooled reactor plants using steam pressurizer system.

SUBSTANCE: proposed steam pressurizer that incorporates provision for maintaining desired water-gas and chemistry conditions of primary circuit coolant has housing accommodating heaters, cooling sprayer, and shell. Heaters are disposed in pressurizer water space and cooling sprayer, in steam space. Inner space of shell communicates on top with steam space and at bottom, with water space of pressurizer; inner space of shell also houses additional sprayer installed in its top part and made in the form of conical funnel; top part of shell is congruent with sprayer configuration.

EFFECT: enhanced reliability of pressurizer system.

3 cl, 1 dwg

FIELD: auxiliary equipment for nuclear power plants of spacecraft.

SUBSTANCE: proposed nuclear plant includes nuclear reactor, radiation protection, cooler-radiator and deployment system. Plant has frame consisting of three rods located between nuclear power plant and intermediate frame; it also has three rods shifted relative above rods through angle of 60 deg. and located between this frame and spacecraft. Frame is made in form of triangular prism. Each rod consists of two beams; articulations are fitted in joint areas between beams, between beams and nuclear power plant and between intermediate frame and spacecraft. Articulations make it possible to perform angular motion of beams in longitudinal planes of nuclear power plant when it is shifted from launch position to orbital position. Electrical connecting lines are arranged on beams.

EFFECT: reduced mass and launch dimensions of plant due to compact location of components of deployment system around plant.

3 cl, 2 dwg

Nuclear power plant // 2247435

FIELD: nuclear power engineering; liquid-metal cooled reactor plants.

SUBSTANCE: proposed nuclear power plant has liquid-metal cooled reactor using liquid lead or its alloys as coolant and incorporating reactor core whose space under empty state holds steam generators, circulating means, shielding gas system, and gas mixture inlet device in the form of motor-rotated gas-delivery chamber immersed under coolant empty state in its circulating path that communicates by means of channels with shielding gas system and with circulating coolant space; top and bottom walls of gas delivery chamber function as carrying members of liquid-metal coolant circulators shaping flow toward channel for gas mixture outlet from gas delivery chamber. Such design provides for dispensing with cold traps and with hydrodynamic and mechanical filters.

EFFECT: effective cleaning of reactor unit surfaces, core and steam generator heat-transfer surfaces from deposits of coolant oxides.

2 cl, 2 dwg

Nuclear power plant // 2236714
The invention relates to the field of nuclear energy and can be used in nuclear reactors with spent fuel assemblies on the basis of microtalon

The invention relates to nuclear and space and fusion technique and liquid metal cooling systems and can be used in high temperature NPU liquid metal cooled mainly for space application

Recombinant element // 2446488

FIELD: power industry.

SUBSTANCE: recombinant element (4) with a number of catalyst elements (8) arranged in common housing (6), which, in presence of hydrogen brought together with gas flow, cause the recombination reaction with oxygen; at that, housing (6) envelopes chimney-like catalyst elements (8) arranged in it so that the heat released during recombination reaction maintains the gas flow inside housing (6) by means of convection. And at that, at least one of catalyst elements (8) arranged inside housing (6) has the specified ignition zone (20). According to the invention, catalyst element (8) has catalytically active zone from porous material chosen so that in the specified ignition zone (20) in convection mode under ambient conditions of approximately 1 bar and 100C at hydrogen concentration in incoming gas flow of more than 5 vol % there set is temperature of surface, which is higher than that existing under such ignition temperature conditions, which is approximately 560C; at that, before catalyst element (8) on the side of gas flow there connected are flow focusing devices of the group including guide flaps, diverting flaps, turbulators and turbulence shapers.

EFFECT: increasing sensitivity of the system to pressure pulses or gas movement processes; improving reliability, safety of introduced ignition.

9 cl, 3 dwg

FIELD: atomic power stations accident prevention equipment.

SUBSTANCE: the invention is pertaining to the field of atomic power stations accident prevention equipment. The invention presents a working member of a catalytic burner of hydrogen made in the form of a long-sized object made out of a material ensuring hydrogen flameless catalytic burning. The crosscut size of the long-sized object "d" is determined by the following formula: where "n" is the factor of safety demonstrating in how many times the minimal temperature in Kelvins of ignition of the air-hydrogen mixture is increased at utilization of the catalytic burner working member having the form of the long-sized object with the crosscut size "d", expressed in micrometers. Advantages of the invention consist in an increased safety of atomic power stations at utilization of the catalytic burners of hydrogen in rooms.

EFFECT: the invention ensures an increased safety of atomic power stations at utilization of the catalytic burners of hydrogen in rooms.

2 cl, 2 dwg

Nuclear power plant // 2247435

FIELD: nuclear power engineering; liquid-metal cooled reactor plants.

SUBSTANCE: proposed nuclear power plant has liquid-metal cooled reactor using liquid lead or its alloys as coolant and incorporating reactor core whose space under empty state holds steam generators, circulating means, shielding gas system, and gas mixture inlet device in the form of motor-rotated gas-delivery chamber immersed under coolant empty state in its circulating path that communicates by means of channels with shielding gas system and with circulating coolant space; top and bottom walls of gas delivery chamber function as carrying members of liquid-metal coolant circulators shaping flow toward channel for gas mixture outlet from gas delivery chamber. Such design provides for dispensing with cold traps and with hydrodynamic and mechanical filters.

EFFECT: effective cleaning of reactor unit surfaces, core and steam generator heat-transfer surfaces from deposits of coolant oxides.

2 cl, 2 dwg

The invention relates to a catalytic element for recombination of hydrogen and/or carbon monoxide with oxygen for nuclear power plants

The invention relates to the field of purification of liquid metal coolants

Nuclear power plant // 2192052
The invention relates to nuclear engineering and can be used in the reactor liquid metal cooled

The invention relates to a device for the recombination of hydrogen in the gas mixture, in particular for nuclear power plant

The invention relates to a method and apparatus for initiating the reaction of hydrogen with oxygen in a catalytic recombination or incendiary device

The invention relates to nuclear engineering, in particular to methods of operation fast homogeneous nuclear reactors

Nuclear power plant // 2247435

FIELD: nuclear power engineering; liquid-metal cooled reactor plants.

SUBSTANCE: proposed nuclear power plant has liquid-metal cooled reactor using liquid lead or its alloys as coolant and incorporating reactor core whose space under empty state holds steam generators, circulating means, shielding gas system, and gas mixture inlet device in the form of motor-rotated gas-delivery chamber immersed under coolant empty state in its circulating path that communicates by means of channels with shielding gas system and with circulating coolant space; top and bottom walls of gas delivery chamber function as carrying members of liquid-metal coolant circulators shaping flow toward channel for gas mixture outlet from gas delivery chamber. Such design provides for dispensing with cold traps and with hydrodynamic and mechanical filters.

EFFECT: effective cleaning of reactor unit surfaces, core and steam generator heat-transfer surfaces from deposits of coolant oxides.

2 cl, 2 dwg

Up!