Class 250/356.2 - Using radioactive tracer

Subclass of Class 250 - Radiant energy
Definition: Subject matter wherein the material is or includes a radioactive
No. of patents: 27
Last issue date: 07/22/2008

Number	Title	Issue Date
7402800	Method and device for the continuous determination of damage to systems used for the post-treatment of heat engine exhaust gases The invention relates to a method for the continuous determination of the damage to at least one system (7) used for the post-treatment of exhaust gases from an internal combustion engine (2), caused by the lubricating oil, the fuel and/or at least one...	07/22/2008
7394074	Protective housing for radionuclide generator and combination thereof A protective cover and radionuclide generator assembly. The cover protecting inlet and outlet connections disposed on the radionuclide generator. The radionuclide generator having a distal end having a generally flat top surface. The protective cover removably fixed...	07/01/2008
7342231	Detection of coincident radiations in a single transducer by pulse shape analysis Pulse shape analysis determines if two radiations are in coincidence. A transducer is provided that, when it absorbs the first radiation produces an output pulse that is characterized by a shorter time constant and whose area is nominally proportional to the energy ...	03/11/2008
7291836	Method and device for continuous determination of lubricating oil consumption of an internal combustion engine The invention relates to a method and device for the continuous determination of the lubricating oil consumption of an internal combustion engine. The inventive method consists in: placing a determined quantity of at least one radioactive tracer in the lubricating o...	11/06/2007
6653651	Micron resolution particle image velocimeter A method and apparatus for measuring fluid motion with micron scale spatial resolution has been developed. Here, micron or submicron solid fluorescent particles are injected into the fluid body. The particles are chosen to closely follow the motion of the...	11/25/2003
6399390	Measuring movement of solid particles and particle interactions in a flowing system A method of measuring the movement of solid particles and particle interactions in a flowing system includes the step of providing two gamma cameras set up at right angles to each other to periodically record the position of a radioactively tagged particl...	06/04/2002
5543617	Method of measuring flow velocities using tracer techniques A method of measuring flow velocities in flowing fluids includes injecting into the flow a non-radioactive tracer having a neutron capture cross section higher than that of the flowing fluids, for example a gadolinium compound, and measuring the neutron c...	08/06/1996
5243190	Radioactive tracing with particles There is provided radioactive particles having a ceramic matrix and an element which can be bombarded with neutrons to produce a gamma ray-emitting isotope. The particles are manufactured by mixing the ceramic components and the element, forming particles...	09/07/1993
5219518	Nuclear oxygen activation method and apparatus for detecting and quantifying water flow A nuclear spectroscopy method and apparatus for obtaining qualitative and quantitative information related to water flow, comprising the steps of: (1) irradiating the water flow with a source of neutrons of sufficient energy to interact with oxygen atoms in th...	06/15/1993
5200615	Method and apparatus for detecting the presence of fluids A method and apparatus particularly for monitoring leakage of a fluid contained within a double-walled tank into its interstitial space is disclosed. The sensor includes an element which is subject to physical change upon exposure to the material containe...	04/06/1993
5187366	Sensors for detecting leaks A sensor for detecting leakage of a particular fluid into an area to be monitored, such as an interstitial space of a double-walled tank or pipeline, comprises first and second fiber optics. A first end of the first fiber optic is disposed to a source of ...	02/16/1993
5065016	Radioactive well logging to determine vertical brine flow Brines in earth formations in the vicinity of a well borehole are bombarded with neutrons. The neutrons are slowed to thermal energy and captured by sodium atoms in the brine according to the nuclear reaction 23 Na (n, γ) 24 Na. Spa...	11/12/1991
5045692	Simultaneous fluid flow and fluid density measurements using rotameter and nuclear technology A fluid flow and simultaneous fluid density measuring device is set forth. The preferred embodiment incorporates a sonde having a lower inlet port, an upper outlet port, a lengthwise tube extending through the sonde and connected with the ports. A packer ...	09/03/1991
5036200	Device for counting particles of ionizing radiation and its application to implementing a method of measuring the rate of leakage between the primary and secondary circuits of a steam generator A device for counting particles of ionizing radiation comprises a detector and a reference source on the input side of the detector delivering reference radiation the spectrum of which is situated outside the spectrum of the ionizing radiation to be detec...	07/30/1991
4983841	Non-invasive inspection Residual core material can be detected inside hollow cast articles using positron emission tomography. Positron radio-isotope material is inducted into any residual core material present by immersing a cast article in an aqueous solution of radio-isotope ...	01/08/1991
4918313	Device for counting particles of ionizing radiation and its application to implementing a method of measuring the rate of leakage between the primary and secondary circuits of a steam generator A device for counting particles of ionizing radiation comprises a detector and a reference source on the input side of the detector delivering reference radiation the spectrum of which is situated outside the spectrum of the ionizing radiation to be detec...	04/17/1990
4795903	Analysis of fluids A method and apparatus are provided for analysing a fluid, especially an oil/water/gas mixture of unknown composition flowing in a pipeline (10). The apparatus can operate remotely, for example on the sea bed. A gamma-ray source (12) and a diametrically a...	01/03/1989
4746795	Method of and apparatus for analyzing fluid flows within hollow bodies A representation of oil flow in a gas turbine engine is obtained by injecting a compatible radioactive isotope label into the engine oil flow and detecting the radiation emitted from within the body with detectors mounted outside the body to produce signa...	05/24/1988
4697079	Analyzing fluid flows within hollow bodies Carrier particles, e.g., of metal or metal oxide, are doped with a positron-emitting isotope and injected into fluid flowing in a body, such as a gas turbine engine. The positrons decay on coming to rest, giving two gamma rays which are detected, and a 3D...	09/29/1987
4232224	Nuclear reactor primary coolant loop flowmeter with phase shift tracking compensation An improved nuclear reactor primary loop flowmeter having two spaced N-16 detectors (12 and 14) positioned along the primary loop piping for monitoring the N-16 activity within the coolant at the respective detector locations. The outputs of the two detec...	11/04/1980
4197456	Flowmeter for liquids A passive device particularly for the improved measurement of the flow of a liquid is described. The device comprises a conduit defining a flow volume for the internal transit therethrough of a liquid to be received at one open end thereof and discharged ...	04/08/1980
4166216	Methods and apparatus for determining dynamic flow characteristics of production fluids in a well bore In the representative embodiments of the new and improved methods and apparatus disclosed herein, a well tool incorporating the principles of the present invention is stationed in a production well and discrete quantities of a water-miscible radioactive t...	08/28/1979
4166215	Methods and apparatus for determining dynamic flow characteristics of production fluids in a well bore In the representative embodiments of the new and improved methods and apparatus disclosed herein, a well tool incorporating the principles of the present invention is arranged for selectively discharging discrete minor quantities of a first radioactive tr...	08/28/1979
4107525	Flowmeter device and method for determining velocity of a fluid A passive flowmeter device is described comprising a conduit for conducting fluid flow therethrough, means located at or near one end of the conduit for introducing fluid flow into the conduit, means located at or near the other end of the conduit for rem...	08/15/1978
4041994	Dose dispenser for radioactive gas An activity metering apparatus for metering predetermined activities of radioactive gas from a supply ampul to dose vials. The apparatus includes a shielded ampul housing, a fine metering valve communicating with the ampul housing chamber, a shielded vial...	08/16/1977
4035646	Flow monitoring system A flow monitoring system which utilizes the decay of a measurable parameter of the flowing fluid by measuring the magnitude of the parameter at two spaced points along the flow of the fluid. Accurate measurements are enabled by the elimination of detector...	07/12/1977
3961189	Device for monitoring activity of gases Device for monitoring activity of gases in nuclear engineering installations, especially for metrologically registering iodine contained in exhaust air, includes gas-withdrawing lines, and a common measuring and evaluating station to which the gas-withdra...	06/01/1976

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Class 250/356.2 - Using radioactive tracer