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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 8040997 | PH adjusting system and PH adjusting method A pH adjusting system includes a water pit for refueling 35 that is disposed in a reactor container 10, which stores a reactor, and is capable of storing cooling water and a pH adjusting apparatus 37 that is disposed above the water pit for refu... | 10/18/2011 |
| 7676017 | Vacuum actuated anhydrous ammonia feed system for pH adjustment of boiler condensate/feed water A vacuum actuated and sustained ammonia feed system for the pH adjustment of power plant condensate and boiler feed water is described. This system can provide a safe means of providing anhydrous ammonia for pH adjustment to the condensate/feed water system of a pow... | 03/09/2010 |
| 7363978 | Methods of using reactive surfactants in subterranean operations Novel uses of reactive surfactants in treating subterranean formations and/or proppant particulates are provided. In one embodiment, the present invention provides a method comprising: providing a treatment fluid that comprises a base fluid and a reactive surfactant... | 04/29/2008 |
| 7346140 | Reactor structural member and method of suppressing corrosion of the same A photocatalytic substance having the properties of an n-type semiconductor is deposited on a surface of a metal base made of a stainless steel or Inconel. When necessary, the hydrogen concentration of the reactor water is increased. A current produced by the photoc... | 03/18/2008 |
| 7337613 | Method for monitoring and controlling steam turbine system pH using shaft current The present invention involves a system for controlling the electric charge within the exhaust hood and condenser of a steam turbine by using shaft current as an indirect measurement of exhaust charge, and then adjusting the pH accordingly. The present invention use... | 03/04/2008 |
| 7321650 | Apparatus for transferring an article between fluid-filled vessels The invention relates to a method for transferring an article from a fluid-filled first vessel into a fluid-filled second vessel or in the opposite direction. The vessel is connected by a connecting element, in which there is a transport device for moving the articl... | 01/22/2008 |
| 7264770 | Mitigation of stress corrosion cracking of structural materials exposed to a high temperature water A method for mitigating stress corrosion cracking of a component exposed to a high temperature water in a high temperature water system is provided. The method comprises the steps of lowering corrosion potential conditions to a desired low corrosion potential in the... | 09/04/2007 |
| 7253002 | Fluid storage and dispensing vessels having colorimetrically verifiable leak-tightness, and method of making same A chemical storage and dispensing vessel having associated therewith a colorimetric member that is effective to change color in exposure to leakage of a gas contained in the vessel. The colorimetric member may be constituted by a film, e.g., of a shrink-wrap charact... | 08/07/2007 |
| 7147823 | High temperature cooling system and method A method for cooling a heat source, a method for preventing chemical interaction between a vessel and a cooling composition therein, and a cooling system. The method for cooling employs a containment vessel with an oxidizable interior wall. The interior wall is oxid... | 12/12/2006 |
| 7031779 | Method and apparatus for automated crack behavior prediction determination A method of predicting component crack behavior in a nuclear reactor provides access to a crack growth behavior model over a global network. A user inputs water chemistry and material characteristics of a particular nuclear reactor and can perform crack growth rate ... | 04/18/2006 |
| 7027549 | Nuclear power plant system and method of operating the same Migration of radioactive materials from a pressure vessel to a steam system in a nuclear power plant is suppressed by using a dryer (3) provided with corrugated plates (22) having surfaces coated with an inorganic ion-exchange material stable under a c... | 04/11/2006 |
| 6968028 | Nuclear power station having a gas-injection device for a coolant A nuclear power station includes a feedwater/steam circuit having a condensate-purification device and a feedwater pump connected upstream of a reactor pressure vessel. A branch line has a gas-injection device for introducing hydrogen into a coolant to ensure especi... | 11/22/2005 |
| 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 |
| 6940939 | Reactor structural member and method of suppressing corrosion of the same A photocatalytic substance having the properties of an n-type semiconductor is deposited on a surface of a metal base made of a stainless steel or Inconel. When necessary, the hydrogen concentration of the reactor water is increased. A current produced by the photoc... | 09/06/2005 |
| 6937686 | Iron control in BWR's with sacrificial electrodes Method for controlling the level of iron in feedwater of a BWR wherein an iron-containing sacrificial electrode in placed contact with the feed water dissolution of the electrode is induced at a rate which provides a desired level of iron in the feedwater. ... | 08/30/2005 |
| 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 |
| 6898259 | Process for reducing the corrosion of a component of a nuclear facility, and component of a nuclear facility The corrosion of a component in a water-guiding loop of a nuclear facility is reduced. A protective layer is produced with a sol-gel process. Prior to the sol application, water that wettens the component is removed from the conduction system and the component is op... | 05/24/2005 |
| 6891912 | Fuel assemblies in a reactor core and method of designing and arranging same A reactor core (104) includes fuel assemblies (202) arranged in a loading pattern (1100) in response to corresponding power levels of the fuel assemblies (202). A crud deposition model (412) is used to predict crud deposition on th... | 05/10/2005 |
| 6885721 | Inhibition method of stress corrosion cracking of nuclear steam generator tubes by lanthanum boride The present invention relates to a method for inhibiting stress corrosion cracking occurring on steam generator tubes in the secondary side of nuclear power plants and an inhibitor therefor. The method comprises supplying lanthanum boride as an inhibitor for stress ... | 04/26/2005 |
| 6873672 | Procedure and device for measuring resistance to hydriding of tubes and tubular claddings The method involves measuring hydrogen permeation in the tubes by mass spectrometry, wherein the tube is inserted into a high or ultrahigh vacuum device in which a mass spectrometer and a total pressure gauge are located. H2 or H2 and inert gas... | 03/29/2005 |
| 6856665 | Method for controlling water quality in nuclear reactor and nuclear power plant to which the method is applied A method for controlling water quality in a nuclear reactor comprises a first and second steps. The first step is to make an amount of iron, which is carried into the nuclear reactor and corrosively eluted from structural material within the nuclear reactor into rea... | 02/15/2005 |
| 6810100 | Method for treating power plant heater drain water Oxygen is mixed with heater drain water of power plant which contains fine particles of iron oxides such that the concentration of the dissolved oxygen in the heater drain water after the mixing of oxygen is in a range from 1 μg/liter to 20 μg/liter. The obtained ... | 10/26/2004 |
| 6793883 | Application of catalytic nanoparticles to high temperature water systems to reduce stress corrosion cracking A method and system for reducing stress corrosion cracking in a hot water system, such as a nuclear reactor, by reducing the electrochemical corrosion potential of components exposed to high temperature water within the structure. The method includes the steps of: p... | 09/21/2004 |
| 6724854 | Process to mitigate stress corrosion cracking of structural materials in high temperature water A method for mitigating stress corrosion cracking in high temperature water includes introducing catalytic nanoparticles and dielectric nanoparticles to the high temperature water in an amount effective to reduce a electrochemical corrosion potential of the high tem... | 04/20/2004 |
| 6714618 | Temperature-based method for controlling the amount of metal applied to metal oxide surfaces to reduce corrosion and stress corrosion cracking Method for controlling the amount of metal atoms deposited into an oxide layer present on a metal surface, which metal atoms increase the corrosion resistance of metal when present in the oxide film, wherein the metal surface is submerged in water at a selected temp... | 03/30/2004 |
| 6697449 | Temperature-based method for controlling the amount of metal applied to metal oxide surfaces to reduce corrosion and stress corrosion cracking Method for controlling the amount of metal atoms deposited into an oxide layer present on a metal surface, which metal atoms increase the corrosion resistance of metal when present in the oxide film, wherein the metal surface is submerged in water at a se... | 02/24/2004 |
| 6633623 | Apparatus and methods for protecting a jet pump nozzle assembly and inlet-mixer A jet pump for a nuclear reactor includes a riser and an inlet mixer having a set of nozzles and a mixing section for receiving coolant flow from the nozzles and suction flow from an annular space between the reactor vessel and the shroud core. To minimiz... | 10/14/2003 |
| 6606368 | Method of operating nuclear power plant, nuclear power plant, and method of controlling water chemistry of nuclear power plant In a nuclear power plant, by injecting an amount of hydrogen small enough not to increase a radiation dose rate of the main steam system, ECP of metallic component materials composing a nuclear reactor can be decreased to suppress the potential of occurre... | 08/12/2003 |
| 6556642 | Inhibition method of the secondary side stress corrosion cracking in nuclear steam generator tubes The present invention relates to a method for inhibiting stress corrosion cracking occurring on steam generator tubes in the secondary side of nuclear power plants and an inhibitor therefor. The method comprises supplying cerium boride as an inhibitor for... | 04/29/2003 |
| 6549603 | Method of chemical decontamination To suppress a decrease of thickness due to corrosion of structural members and to achieve a removal of radionuclides with good efficiency in a nuclear power plant, oxidation decontamination is first conducted. An aqueous potassium permanganate solution is... | 04/15/2003 |
| 6488782 | Method of reducing corrosion potential and stress corrosion cracking susceptibility in nickel-based alloys Method for reducing in situ the electrochemical corrosion potential and susceptibility to stress corrosion cracking of a nickel-base alloy and boiling water nuclear reactor components formed therefrom when in contact with high temperature water. The metho... | 12/03/2002 |
| 6473480 | Method and apparatus for maintaining proper noble metal loading for a noble metal application process for water-cooled nuclear reactors A non-steady state computer model of water in a Boiling Water Reactor (BWR) primary water flow circuit is used to represent the water chemistry and noble metal loading during, for example, an in situ noble metal application process. The modeling software ... | 10/29/2002 |
| 6440297 | System and method for determining noble metal concentrations in reactor coolant streams A system and method for determining a noble metal concentration in a sample that is representative of a noble metal concentration in either a volume of water circulated through a nuclear reactor or a surface of a nuclear reactor component exposed to the v... | 08/27/2002 |
| 6430249 | Polymer dispersants and methods of use in a nuclear steam generator A novel high-purity polymer dispersant and sludge conditioner added to the feedwater entering the secondary side of a nuclear steam generator for minimizing the accumulation of metal-oxide deposits within the nuclear steam generator during the continuing ... | 08/06/2002 |
| 6415010 | Catalytic hydrogen peroxide decomposer in water-cooled reactors A metal cooling tube of a water-cooled nuclear reactor, having an inner surface thereof exposed to an aqueous cooling medium containing hydrogen peroxide. The cooling tube has its inner surface coated with matter selected from the group consisting of the ... | 07/02/2002 |
| 6314153 | Process for introducing zinc into a water-containing component of the primary system of a nuclear power plant Disclosed is a process for introducing zinc into a water-containing component of the primary system of a nuclear power plant, in particular for preventing the deposition of radioactive cobalt and/or for reducing the possible susceptibility of materials in... | 11/06/2001 |
| 6259758 | Catalytic hydrogen peroxide decomposer in water-cooled reactors A metal cooling tube of a water-cooled nuclear reactor, having an inner surface thereof exposed to an aqueous cooling medium containing hydrogen peroxide. The cooling tube has its inner surface coated with matter selected from the group consisting of the ... | 07/10/2001 |
| 6024805 | Metal hydride addition for reducing corrosion potential of structural steel A method for reducing the corrosion potential of steel vessels and piping used in nuclear reactors, in particular steel vessels and piping carrying high temperature water and/or steam which has a concentration of oxygen therein. A metal hydride is added t... | 02/15/2000 |
| 6019942 | Method of maintaining the corrosion resistance of a steel circulation system with a lead-containing coolant The method is to develop an anticorrosive cover out of oxides of structural steel components on a circuit internal surface in which in the course of the circuit operation, the oxygen concentration, which is dissolved in the coolant, is maintained not lowe... | 02/01/2000 |
| 5995576 | Inhibition of radioactive material deposition in primary coolant structure of nuclear power plant A mixture of metal ions is added to the primary cooling water of a water-cooled nuclear reactor to inhibit deposition of radioactive materials in the cooling water on the inner surfaces of pipes. The mixture of metal ions added to the cooling water introd... | 11/30/1999 |
