66 results about "Tritiated water" patented technology

A process for light water detritiation comprised of water distillation for tritium stripping and enriching, followed by chemical conversion of tritium enriched water to elemental hydrogen, and finally by one or more thermal diffusion columns for final tritium enrichment. The combination of process steps takes advantage of water distillation large throughput capability at low tritium concentration with the simplicity of thermal diffusion for small throughput final tritium enrichment. The water distillation front-end and the thermal diffusion back end processes are compatible with any intermediate chemical conversion process such as electrolysis or water gas shift reaction to convert tritiated water to elemental hydrogen.

A diffusion based process for tritium removal from water by tritium transfer from water to an elemental hydrogen stream, followed by a membrane diffusion cascade for tritium stripping and enrichment, and final tritium enrichment by one or more thermal diffusion columns. The combination of process steps takes advantage of membrane diffusion's large throughput capability at low tritium concentration with the simplicity of thermal diffusion for small throughput final tritium enrichment. The membrane diffusion stages use supported or unsupported microporous or hydrogen permeable metal membranes (such as Pd / Ag alloy). The diffusion process is compatible with any front-end process to transfer tritium from tritiated water to elemental hydrogen. The process may be designed and operated at low pressure, with small gas inventory, and no inherent overpressure hazard.

A process for light water detritiation which includes the steps of water distillation for tritium stripping and enriching, followed by chemical conversion of tritium enriched water to elemental hydrogen, and finally by one or more thermal diffusion columns for final tritium enrichment. The combination of process steps takes advantage of water distillation large throughput capability at low tritium concentration with the simplicity of thermal diffusion for small throughput final tritium enrichment. The water distillation front-end and the thermal diffusion back end processes are compatible with any intermediate chemical conversion process such as electrolysis or water gas shift reaction to convert tritiated water to elemental hydrogen.

The invention discloses an on-site calibration device of an airborne tritium monitoring instrument. The on-site calibration device of the airborne tritium monitoring instrument comprises an air processor, a bubbling unit, a transmission instrument, an aspirator pump and a recovery unit, all of which are sequentially connected, wherein the air processor is used for filtering and drying inlet air, the bubbling unit is used for bubbling tritiated water to form saturated tritium flow, the transmission instrument is used for being connected with a calibrated detection instrument and measuring the activity and concentration of the tritium flow generated on site, the aspirator pump is used for pumping the tritium flow into the recovery unit for recovery after the activity and concentration of the tritium flow generated on site are detected, and the recovery unit is used for cooling and recovering the recovered tritium flow. The ranges of the activity and concentration of the tritium flow generated by the on-site calibration device of the airborne tritium monitoring instrument in a bubbling mode depend on the total activity of the tritium flow for bubbling and can meet the calibration of most existing nuclear facilities using the measuring span of the tritium monitoring instrument. The uncertainty of the synthesis standard of the activity and concentration of the bubbled tritium flow is less than or equal to 10 percent, and the recovery rate of the tritiated water vapor by the recovery unit is more than 99 percent.

A diffusion based process for tritium removal from water by tritium transfer from water to an elemental hydrogen stream, followed by a membrane diffusion cascade for tritium stripping and enrichment, and final tritium enrichment by one or more thermal diffusion columns. The combination of process steps takes advantage of membrane diffusion's large throughput capability at low tritium concentration with the simplicity of thermal diffusion for small throughput final tritium enrichment. The membrane diffusion stages use supported or unsupported microporous or hydrogen permeable metal membranes (such as Pd / Ag alloy). The diffusion process is compatible with any front-end process to transfer tritium from tritiated water to elemental hydrogen. The process may be designed and operated at low pressure, with small gas inventory, and no inherent overpressure hazard.

The invention belongs to the technical field of tracer test, and in particular relates to an inter-well monitoring method for radioactive isotope. The inter-well monitoring method for the radioactive isotope comprises the steps of obtaining a background sample; treating tritiated water as a radioactive isotope tracer agent and calculating the filling quantity of the tritiated water; transferring the tritiated water of which the filling quantity is calculated into a liquid releasing device; filling the tritiated water into a water filling well through the liquid releasing device; sampling from a monitoring oil well; processing the obtained oil-water sample and preparing into a detection-level sample; transferring the detection-level sample into a beta-ray detecting instruction for detecting to obtain detection data; further analyzing and processing; preparing a tracer agent response curve. According to the inter-well monitoring method for the radioactive isotope, the tritiated water is used as the radioactive isotope tracer agent; the radioactive isotope tracer agent has the advantages of being low in detection cycle, high in chemical and radiochemistry stability, free of attaching to rock and the oil well, and low in toxicity; a low background liquid scintiloscope and an ultralow background liquid scintiloscope is utilized to detect the strength of beta rays; therefore, the sensitivity of instruments is high; the experiment data are accurate.

The present invention provides a novel tritium distillation device, which includes a container, a radiator covered on top of the container with a protrusion at the bottom, a conduit penetrating the container with an inlet and an outlet, the inlet being arranged in correspondence with the protrusion, and a heating device fixed below the container. The method of operating the tritiated water distillation includes the steps of adding environmental tritiated water in the container, covering the radiator on top of the container closely, heating environmental tritiated water to cause tritiated water steam to be condensed to the bottom of the radiator, and collecting the tritiated water condensation dropped from the protrusion with conduit. The present invention uses a simple structure to ease assembly and reduce the cost of cooling water source.

Provided is an industrially feasible method for separating tritiated water from light water.The method comprises:a step of removing tritiated water and heavy water from light water by adding heavy water to a liquid mixture containing tritiated water and light water,by converting into a gas hydrate consisting essentially of tritiated water and heavy water as the crystal structure under a condition of converting into the gas hydrate of at least one of heavy water and tritiated water, and yet keeping light water in the liquid state, anda step of separating tritiated water from heavy waterby breaking the gas hydrate structure containing tritiated water and heavy water, so as to get a liquid mixture,by converting the liquid mixture containing tritiated water and heavy water into a gas hydrate containing tritiated water in the crystal structure under a condition of converting into a gas hydrate containing tritiated water in the crystal structure and yet keeping heavy water in the liquid condition and then,by breaking the gas hydrate structure of tritiated water, so as to collecting tritiated water in that order.

The invention provides a portable sampling device used for air tritiated water. A semiconductor refrigeration sheet and a cooling fan inside of the sampling device are connected to a power supply through wires, the heating surface of the semiconductor refrigeration sheet is tightly close to the cooling fan, the refrigeration surface of the semiconductor refrigeration sheet is wrapped with a heat insulation layer housing, a temperature sensor and an accommodation container are placed in a heat insulation layer canvity body, an air inlet, an air outlet and a power air pump outlet are all connected to a hose, a flow display controller is connected to a power air pump through a signal line, and the power air pump is connected to the power supply. According to the sampling device, the power air pump is utilized to adjust inhalational water vapor flow containing tritium in the environment, and the semiconductor refrigeration sheet is utilized to fast condense the water vapor flow containing tritium and collect the condensed water vapor flow containing tritium into a container to form tritiated water. The sampling device can be applicable to fast sampling of the water vapor flow containing tritium near a respiratory zone of working staffs in a tritium related place, has the advantages of being small in size and strong in practicability, and can provide support for tritium radiation protection for tritium related working staffs.

The invention belongs to the technical field of radiation protection, and specifically relates to a system for reducing the concentration of gas-borne tritium in a nuclear power plant building. The system is used for removing tritiated water vapor in to-be-treated gas which is gas in the nuclear power plant building and in a ventilation system in the nuclear power plant building. The system comprises a tritiated water dehumidifying device and a tritiated water collecting device which are arranged in a device box (1), wherein the to-be-treated gas in the ventilation system enters the device box(1); the tritiated water vapor in the to-be-treated gas is converted into tritiated water through the tritiated water dehumidifying device; the tritiated water is collected through the tritiated water collecting device; and the to-be-treated gas with the tritiated water vapor removed is used as regenerated gas and discharged out of the device box (1). The system provided by the invention has fewactive components, is simple in maintenance, facilitates reducing of occupational exposure of workers, can reduce the content of the tritiated water vapor in the environment of the nuclear power plantbuilding, and reduces the concentration of the gas-borne tritium in the nuclear power plant building.

A liquid phase catalytic exchange column with a catalyst is configured to receive hydrogen gas. The system uses the catalyst to exchange the hydrogen gas with the tritiated source yielding HT gas and tritiated water. The system monitors tritium content of the tritiated water. When a predetermined tritium level is detected, the tritiated water is released. The system also includes a gaseous permeation system comprising a permeable barrier for the selective extraction of gases.

The invention provides a tritium water electrolysis concentration device and method. The equipment includes: an electrolysis cell for electrolyzing tritium water, which includes a water inlet, a hydrogen outlet, and an oxygen outlet; a sample bottle, which includes a sample inlet and a water outlet, and the sample inlet is used to introduce the sample tritium water into the sample bottle , the water outlet is used to export the sample tritium water, and the water outlet is connected to the water inlet of the electrolyzer; the oxygen discharge device is connected to the oxygen outlet of the electrolyzer, and is used to discharge the oxygen produced by electrolysis to the environment; the hydrogen discharge device is connected to The hydrogen gas outlet to the electrolyzer is used to discharge the hydrogen gas produced by electrolysis to the environment, and the hydrogen gas discharge device includes a mass flow meter for measuring the cumulative mass flow rate of hydrogen gas produced by electrolysis. According to the technical scheme of the present invention, the structure design is simple, the operation is convenient, the electrolysis efficiency is high, the volume concentration rate is calculated accurately, and it is safe and pollution-free, realizing the safe, efficient and stable electrolysis concentration of low-level tritium water in the environment.