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| Number | Title | Issue Date |
| 7087120 | System and method for chemical decontamination of radioactive material A method for chemically decontaminating radioactive material. The method includes reducing-dissolving step for setting surface of radioactive material in contact with reducing decontamination liquid including mono-carboxylic acid and di-carboxylic acid as dissolvent... | 08/08/2006 |
| 6972095 | Magnetic molecules: a process utilizing functionalized magnetic ferritins for the selective removal of contaminants from solution by magnetic filtration A decontamination system uses magnetic molecules having ferritin cores to selectively remove target contaminant ions from a solution. The magnetic molecules are based upon a ferritin protein structure and have a very small magnetic ferritin core and a selective ion ... | 12/06/2005 |
| 6973154 | Method of chemical decontamination and system therefor In a chemical decontamination method of chemically decontaminating radioactive nuclides from a metallic material, oxalic acid and hydrazine are injected as a reductive decontaminating agent into water that is in contact with the metallic material. Injection of the h... | 12/06/2005 |
| 6961660 | Method and system for data detection in a global positioning system satellite receiver A data detection circuit within a global positioning system (GPS) satellite receiver operates to detect and decode data sent in a spread spectrum signal. The data detection circuit receives input from a radio receiver, the information containing data from a pluralit... | 11/01/2005 |
| 6952440 | Signal detector employing a Doppler phase correction system A spread spectrum detector employs a Doppler phase correction system that improves correlation of pseudo-noise (PN) codes to a received spread spectrum signal by combining phase shifts, in the time domain, to correlation values that compensate for the Doppler shift ... | 10/04/2005 |
| 6944254 | Pressurized water reactor shutdown method A reactor coolant system of a pressurized water nuclear reactor with fuel assemblies in the core is simultaneously shutdown and decontaminated in less than 90 hours after the shutdown is initiated. A LOMI or Can-Derem decontamination reagent is added to reactor cool... | 09/13/2005 |
| 6931055 | Signal detector employing a doppler phase correction system A spread spectrum detector employs a Doppler phase correction system that improves correlation of pseudo-noise (PN) codes to a received spread spectrum signal by combining phase shifts to correlation values, using a fast fourier transform (FFT), that compensate for ... | 08/16/2005 |
| 6928134 | Apparatus for admitting gas into the primary coolant of a pressurized water reactor An apparatus admits gas into the primary coolant of a pressurized water nuclear reactor having a coolant loop for a liquid coolant, in particular water, to which hydrogen is to be added. The coolant loop preferably includes a volume control tank for the coolant as w... | 08/09/2005 |
| 6907891 | Radioactive substance decontamination method and apparatus A radioactive substance decontamination method and apparatus which decontaminates a metal member contaminated by radioactive substance in a short period of time. This apparatus has (1) multiple reducing decontamination tanks having different radiation control values... | 06/21/2005 |
| 6901128 | Foreign matter filter for fuel assembly in pressurized water reactor A foreign matter filter provided between a DFBN and a lower grid has two adjacent thin straps assembled into a lattice. The straps are equipped on the front and back sides with axially continuous protrusions. ... | 05/31/2005 |
| 6702902 | Method and device for radioactive decontamination of a steel wall Disclosed a method for radioactive decontamination of a steel surface, which is performed by bringing the surface to be decontaminated into contact with a pickling solution comprising a first iron oxidation agent, wherein bringing into contact being achie... | 03/09/2004 |
| 6652661 | Radioactive decontamination and translocation method A method for removing a wide variety of radioactive contaminants from a contaminated surface sufficient for the surface to be classified as a low-level waste or as free release. Contaminated surfaces may be classified as Class C, Class B, Class A, or high... | 11/25/2003 |
| 6636577 | Laser induced fluorescence water measurement system for nuclear reactors A water monitoring system for a nuclear reactor is provided. In an exemplary embodiment, the water monitoring system includes a fiber optic cable having a first end and a second end, with the first end configured to optically couple to the reactor cooling... | 10/21/2003 |
| 6605158 | Radioactive decontamination and translocation method A method for removing radioactive contaminants from a given surface. An aqueous solution having a wetting agent and a complex substituted keto-amine is provided. The solution is left on the surface for a time sufficient to remove the radioactive contamina... | 08/12/2003 |
| 6497769 | Radioactive decontamination and translocation method A method for removing radioactive contaminants from a given surface. An acidic solution having a pH of less than 3.0, and preferably less than 1.5, of a complex substituted keto-amine, and a mixture of a saturated and unsaturated lower alcohol (e.g. isopr... | 12/24/2002 |
| 6487265 | Treatment method of nuclear reactor internal component Surfaces of the structural components of a nuclear power plant exposed to reactor water are wetted with an electroless plating solution containing an electrical insulating substance. The electrical insulating substance has a high resistivity about 10... | 11/26/2002 |
| 6466636 | Decontamination method A boiling water reactor having a reactor pressure vessel with two recirculation loops hydraulically connected thereto is decontaminated by installing plugs in the outlets of jet pump ram's head manifolds located within the reactor pressure vessel to isola... | 10/15/2002 |
| 6246739 | Passive aerosol retention apparatus Passive aerosol retention apparatus positioned in the connecting vents of a nuclear reactor containment are described. The aerosol retention apparatus minimizes aerosol transport from the lower drywell to the upper drywell of the reactor containment. The ... | 06/12/2001 |
| 6147274 | Method for decontamination of nuclear plant components A process for removing undesirable material such as a radioactive contaminant from an underlying material. A solution containing fluoroboric acid and a material which affects the fluoroboric acid solution oxidation potential (Eh) is contacted with the con... | 11/14/2000 |
| 6130942 | Skills-based automatic call distribution system A skills based telephone call distribution system is disclosed. The system determines the informational needs of an incoming caller and defines a set of skills an agent should possess to serve the caller. A search is performed for an available agent posse... | 10/10/2000 |
| 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 |
| 5852786 | Process for decontaminating radioactive materials A process for the decontamination of radioactive materials which process comprises the steps of: i) contacting the material to be decontaminated with a dilute carbonate containing solution in the presence of ion exchange particles which either contains or... | 12/22/1998 |
| 5787353 | Process for the in situ recovery of chemical values from UF 6 gaseous diffusion process equipment A process for the recovery of chemical values, particularly uranium, nickel and/or radionuclides from process equipment theretofore employed in a uranium hexafluoride isotope enrichment cascade. Preferably, the process is carried out, in situ, at subatmos... | 07/28/1998 |
| 5724668 | Method for decontamination of nuclear plant components A process for removing undesirable material such as a radioactive contaminant from an underlying material. A solution containing fluoroboric acid and a material which affects oxidation potential (Eh) is contacted with the undesirable material to cause its... | 03/03/1998 |
| 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 |
| 5678232 | Lead decontamination method The present invention provides a method of decontaminating an article containing lead contaminated with radioactive material. The method includes contacting the article containing lead contaminated with radioactive material with a decontamination composit... | 10/14/1997 |
| 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 |
| 5541968 | Coring machine and arrangement for sampling nuclear-contaminated and other hazardous waste The core samples of solidified hazardous waste, such as nuclear waste, are extracted from waste material in a drum by inserting rotating tubular core drills into the waste material and then withdrawing the core drills with core samples of the waste materi... | 07/30/1996 |
| 5434331 | Removal of radioactive or heavy metal contaminants by means of non-persistent complexing agents A process for the decontamination of solid surfaces contaminated with radioactive or heavy metal species using a solution based on one or more non-persistent complexing agents, or for the chemical cleaning of steam generator sludge using such a solution, ... | 07/18/1995 |
| 5425072 | Method of heat treating a radioactive surface In a method of treating a surface 12 of an object 10 contaminated with radionuclides 14, a laser source 16 is directed at the surface 12 to apply a local area 18 of intense heat to the surface 12. The laser source 16 is arranged to pass in a raster manner... | 06/13/1995 |
| 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 |
| 5337336 | Method and apparatus to decrease radioactive iodine release A method and apparatus decrease the release of volatile radioactive iodine from a nuclear reactor pressure vessel containing a reactor core having fuel rods submerged in water. The method includes monitoring the pressure vessel to determine an accident co... | 08/09/1994 |
| 5322644 | Process for decontamination of radioactive materials A process for decontaminating radioactive material comprises the step of contacting the material with a dissolving composition to dissolve the contaminants in the material, said composition comprising a dilute solution of about 0.05 molar ethylene diamine... | 06/21/1994 |
| 5305360 | Process for decontaminating a nuclear reactor coolant system High velocity reactor coolant water in a boiling water reactor or a pressurized water reactor transports radioactive ions and particles from a nuclear reactor vessel to the balance of the reactor coolant system where they deposit on chromium (III) oxide-c... | 04/19/1994 |
| 5295170 | Nuclear reactor with passive means of adjusting the pH of post accident water A nuclear reactor has a passive system for adjusting the pH of post accident water in the containment vessel. A basic liquid is stored in the containment vessel at an elevation above the maximum post accident water level. When radiation levels in the cont... | 03/15/1994 |
| 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 |
| 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 |
| 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 |
| 5122333 | Apparatus for eliminating aerosols from air from an escaping nuclear reactor containment vessel The apparatus comprises a conduit connected to a containment vessel to supply air to a water bath contained in a basin. The conduit is connected to a plurality of air nozzles in the water bath, each of which forms a unit together with a perforate baffle p... | 06/16/1992 |
| 5093071 | Method for avoiding potential accidents in water-cooled nuclear reactors Method and apparatus for avoiding potential accidents in water-cooled nuclear reactors of the type having an enclosing containment, due to the formation of an explosive gas mixture in the containment. Air is withdrawn from the containment and fed to at le... | 03/03/1992 |
