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| Number | Title | Issue Date |
| 6921515 | Apparatus for chemical decontamination In a chemical decontamination apparatus, a catalyst decomposition column in an upstream side of an ion exchange resin column and a hydrogen peroxide injection apparatus in a further upstream side, reduce the amount of waste products caused by a chemical decontaminat... | 07/26/2005 |
| 6456680 | Method of strontium-89 radioisotope production Inert gaseous fission products, including beryllium, rubidium, and krypton isotopes, resulting from the operation of a uranyl sulfate water solution nuclear reactor are passed through a delaying device to precipitate out strontium-90, then passed to a sec... | 09/24/2002 |
| 6192095 | Xenon-133 radioactive stent for preventing restenosis of blood vessels and a process for producing the same Radioactive stents used in angioplasty on sclerotic coronary arteries without the risk of restenosis can be produced by ion injecting 133 Xe into the surfaces of stents as a nuclide that has a shorter half-life and emits a smaller maximum energ... | 02/20/2001 |
| 6017376 | Air extract system for a containment A containment, such as a glovebox (4), has an air extract system comprising suction means which extracts air from the containment through a vortex amplifier (1) mounted in a containment wall opening (2). The amplifier (1) serves to control the extent of s... | 01/25/2000 |
| 5872825 | Apparatus and method for inerting and venting the containment atmosphere in a nuclear power station When hydrogen is generated within the containment of a nuclear power station, its containment atmosphere must be inerted. An undesired pressure buildup within the containment is prevented during such inerting with the apparatus and the method. It is possi... | 02/16/1999 |
| 5706320 | Containment pressure suppression system for liquid metal cooled reactors A pressure suppressing and aerosol scrubbing system configured to be located between low pressure upper containments associated with modular reactor vessels is described. In one embodiment, the pressure suppression and scrubbing system includes a water ta... | 01/06/1998 |
| 5596613 | Pressure suppression containment system for boiling water reactor A system for suppressing the pressure inside the containment of a BWR following a postulated accident. A piping subsystem is provided which features a main process pipe that communicates the wetwell airspace to a connection point downstream of the guard c... | 01/21/1997 |
| 5490187 | Method for gas bubble and void control and removal from metals A method for enhancing the diffusion of gas bubbles or voids attached to impurity precipitates, and biasing their direction of migration out of the host metal (or metal alloy) by applying a temperature gradient across the host metal (or metal alloy). In t... | 02/06/1996 |
| 5481577 | Boiling water reactor fuel assembly filter A reactor coolant debris filter for insertion within a nuclear fuel assembly support.... | 01/02/1996 |
| 5470557 | Zeolites Crystals of the Zeolite Analcime (Analcite) Na2 O.Al2 O3.4SiO.sub.2.2H.sub.2 O are provided having a largest dimension greater than 50 micron. A method for preparing such crystals by mixing aqueous solutions of aluminium s... | 11/28/1995 |
| 5406603 | Apparatus for removing aerosols from the air of a nuclear reactor containment The apparatus is provided with a line (1) connected to the containment for feeding air to a water bath (5). The line (1) is connected to plurality of nozzles (4) disposed in the water bath (5) having at least one perforate baffle plate (27) disposed above... | 04/11/1995 |
| 5402454 | Process and device for obtaining samples from the atmosphere in a closed gastight vessel, preferably from the reactor safety vessel of a nuclear power station A process for obtaining a sample from an atmosphere in a closed gastight vessel, preferably from a reactor safety vessel of a nuclear power station, includes passing a sample through a venturi nozzle immediately upon entry of the sample into a sample-taki... | 03/28/1995 |
| 5368633 | Pressurized radioactive gas treatment system A system for collecting, transferring and storing radioactive gas released from other radioactive materials. In the described process, gas pump (24) removes gas from a headspace volume within an unvented radioactive material storage vessel (8). The gas is... | 11/29/1994 |
| 5353949 | Vent filter assembly A vent filter assembly may be disposed in a wall of a sealed waste container containing radioactive waste or the like and utilized for venting gases. The vent filter includes a housing coupled to the container. The housing includes a first opening communi... | 10/11/1994 |
| 5345479 | Sensitivity enhancement for airborne radioactivity monitoring system to detect reactor coolant leaks A method and apparatus for measuring radioactivity associated with nuclear reactor coolant leaks. The method includes providing a delay tank in a gas sampling line upstream of a radiation particulate monitor, the delay tank allowing radioactive noble gase... | 09/06/1994 |
| 5293413 | System for pressure relief of the containment of a nuclear power plant A method for pressure relief of a containment of a nuclear power plant includes heating a washing fluid in a filter disposed inside a containment at a rated heating power through a thermal bridge, with a gas-steam mixture filling the containment, prior to... | 03/08/1994 |
| 5283010 | Tritium removal Where a concrete structure (12) has been contaminated with tritium (whether as gas or as water) the tritium atoms take the place of ordinary hydrogen atoms in water and in hydroxyl groups in the concrete, rendering it radioactive. The degree of contaminat... | 02/01/1994 |
| 5272738 | Device for monitoring the atmosphere withing a nuclear reactor containment In a device for monitoring the atmosphere within the containment shell (1) of a reactor plant, a sample removal means (41) is provided in the containment shell, from which a gas mixture is led via a measuring line (42) through a measuring zone (14) and su... | 12/21/1993 |
| 5267283 | Nuclear reactor In addition to the metal-fiber filter and molecular sieve of a depressurization system for the containment vessel of a nuclear reactor, within an auxiliary equipment building adjacent the structure surrounding the containment vessel, at least one metal-fi... | 11/30/1993 |
| 5267282 | Device for monitoring the stack exit air in a reactor installation A device for monitoring the stack exit air in a reactor installation consists essentially of a pressure relief line (2) which connects the containment vessel (1) to the stack (5) and in which a filter unit (3) is located. Downstream of the filter, a sampl... | 11/30/1993 |
| 5247547 | Improvements in gloveboxes and like containments A containment, such as a glovebox (3), includes an extract system comprising an extract suction means, a filter housing (4), and a vortex amplifier (1) controlling the extent of suction by the suction means from the containment, wherein the vortex amplifi... | 09/21/1993 |
| 5227127 | Filtered venting system for reactor containment vessel of nuclear power plant A filtered venting system located in association with a reactor containment vessel installed in a reactor building comprises a filter device disposed in the reactor building and including filter means, a first venting line disposed on an upstream side of ... | 07/13/1993 |
| 5223209 | Method for pressure relief of the containment of a nuclear power plant A method for pressure relief of a containment of a nuclear power plant includes heating a washing fluid in a filter disposed inside a containment at a rated heating power through a thermal bridge, with a gas-steam mixture filling the containment, prior to... | 06/29/1993 |
| 5154877 | Passive off-site radiation reduction apparatus A method and apparatus for use in conjunction with a passive nuclear reactor containment cooling system to significantly reduce the release of radiation and resulting off-site doses is disclosed. Gases that may contain radioactive materials are drawn from... | 10/13/1992 |
| 5089217 | Clean-up sub-system for chemical decontamination of nuclear reactor primary systems A unique clean-up sub-system for chemical decontamination of nuclear reactor primary systems is disclosed. Chemically-processed fluids containing suspended and dissolved solids are directed through a back-flushable filter and, thereafter, through one or m... | 02/18/1992 |
| 5078960 | Device for relieving the pressure in the containment of a nuclear power station A device for relieving the pressure in a containment of a nuclear power station. The device includes a filter unit for filtering compressed air from the containment and discharging the air to the atmosphere. Radioactive substances entrained in the compres... | 01/07/1992 |
| 4976938 | Hydrogen isotope separation utilizing bulk getters Tritium and deuterium are separated from a gaseous mixture thereof, derived from a nuclear fusion reactor or some other source, by providing a casing with a bulk getter therein for absorbing the gaseous mixture to produce an initial loading of the getter,... | 12/11/1990 |
| 4964900 | Respirator filter means for removal of tritiated water A filter for a respirator for removal of tritiated water having a housing with fluid inlet and output ports. A filter chamber is interposed between and in communication with the inlet and outlet for containing the tritium filter medium. A tritium filter m... | 10/23/1990 |
| 4935196 | Differential atmospheric tritium sampler An atmospheric tritium sampler is provided which uses a carrier gas comprised of hydrogen gas and a diluting gas, mixed in a nonexplosive concentration. Sample air and carrier gas are drawn into and mixed in a manifold. A regulator meters the carrier gas ... | 06/19/1990 |
| 4925623 | Clamping arrangement for stainless steel fiber filter elements A clamping arrangement for stainless steel fiber filter elements in the pressure relief channel of a safety containment of a nuclear installation. The filter elements are engaged at their edges by a clamping structure which is fully disposed within the du... | 05/15/1990 |
| 4913850 | Process for the removal of iodine and organic iodine compounds from gases and vapors using silver-containing zeolite of the faujasite type Iodine and organic iodine compounds which may be radioactive and which may be found in waste gases or vapors from nuclear reactors can be removed from such gases or vapors by passing the iodine or organic iodine compound-containing gases or vapors through... | 04/03/1990 |
| 4900506 | High-temperature reactor A high-temperature reactor with a reactor core containing fuel elements crossed by a cooling gas circuit comprises a malfunction filter for filtering metal fission products discharged from the fuel elements in the event of core overheating. The filter is ... | 02/13/1990 |
| 4895644 | Fluid supply and recirculation system A fluid recirculation and makeup supply system having an alternate purification loop (84) in parallel with a portion of the recirculation loop (26). In the alternate purification mode of operation of the system a predetermined portion of the recirculated ... | 01/23/1990 |
| 4875945 | Process for cleaning the exhaust gas of a fusion reactor The exhaust gas of a fusion reactor contains, besides non-burnt fuel (tritium and deuterium) and helium, the "ash" from the nuclear fusion reaction a number of impurities with the radioactive tritium and/or deuterium chemically bound to them. In order to ... | 10/24/1989 |
| 4865803 | Gas discharge system for the safety containment of a nuclear reactor A pressurized gas discharge system for the safety containment of a nuclear reactor includes a conduit structure connected to the containment and consisting of a plurality of modular conduit units which are flanged together end-to-end, each having flanged ... | 09/12/1989 |
| 4863677 | Nuclear power plant having a containment A nuclear power plant includes a containment for containing activity carriers. An outlet in the form of an excess pressure safety device leads out of the containment. A filter connects the outlet to the atmosphere. The filter includes a container, a washi... | 09/05/1989 |
| 4859405 | Filtered venting and decay heat removing apparatus and system for containment structures, and method of operation Gases and entrained particulate matter are automatically vented from a nuclear containment as pressure approaches a set point of the containment design during a postulated accident scenario. A porous bed filter is submerged in a tank of water, affording a... | 08/22/1989 |
| 4849155 | Process and apparatus for decontaminating exhaust gas from a fusion reactor fuel cycle of exhaust gas components containing chemically bonded tritium and/or deuterium Process for decontaminating exhaust gas from a fusion reactor fuel cycle of exhaust gas components containing at least one heavy hydrogen isotope selected from tritium and deuterium in compound form, in which the at least one heavy hydrogen isotope is lib... | 07/18/1989 |
| 4775397 | Air supply and recirculation system A method of air recirculation and air makeup for a nuclear reactor control room practiced with air supply apparatus having an alternate purification loop (84) in parallel with a portion of the recirculation loop (26). In the alternate purification mode of... | 10/04/1988 |
| 4755359 | Arrangement for the removal of hydrogen An arrangement for the elimination or removal of hydrogen from a hydrogenntaining gas mixture through the intermediary of foils which are fastened within a closable container, wherein the material of the foils produces an elimination of hydrogen, whereby... | 07/05/1988 |
