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Class Information
Number: 376/307
Name: Induced nuclear reactions: processes, systems, and elements > Reactor protection or damage prevention > With pressurizer means
Description: Subject matter wherein the undesired effect is the uncontrolled or pressure variations which undesired effect is minimized by means for maintaining a desired coolant pressure.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8045671 Injection system and associated operating method Oct. 25, 2011
7873136 Injection system and associated operating method Jan. 18, 2011
6895068 Method for providing a pressurized fluid May. 17, 2005
6594333 Thermal load reducing system for nuclear reactor vessel Jul. 15, 2003
6195406 Spray lines for a pressurizer of a pressured water reactor Feb. 27, 2001
6160863 Variable speed pump for use in nuclear reactor Dec. 12, 2000
5918911 Replacement and repair of nozzles for pressure vessels Jul. 6, 1999
5802128 Device for recovery of fluid contained in the coolant circuit of a nuclear reactor Sep. 1, 1998
5605361 Replacement nozzle for pressure vessels and method of a attaching same Feb. 25, 1997
5491731 Method and system for maintaining pressure in a nuclear power plant primary loop during startup or shutdown Feb. 13, 1996
5415197 Equalizing reservoir configuration, especially for cooling circuits in nuclear power stations May. 16, 1995
5297187 Pressure vessel penetration sealing device Mar. 22, 1994
5278880 Pressurizer tank upper support Jan. 11, 1994
5274683 Method for replacing a nozzle Dec. 28, 1993
5271048 Replacement nozzle and method for replacing a nozzle in a pressure vessel Dec. 14, 1993
5202082 Method and apparatus for replacing a nozzle Apr. 13, 1993
5194215 Automated robotic equipment for ultrasonic inspection of pressurizer heater wells Mar. 16, 1993
5149490 Method and apparatus for replacing a nozzle Sep. 22, 1992
5139732 Process and a device for extracting a heating rod having deformations from a pressurizer casing of a pressurized-water nuclear reactor Aug. 18, 1992
5135705 Plug and method for plugging a penetration in a pressure vessel wall Aug. 4, 1992
5126100 System for qualification of chemical decontamination methods for decontamination of nuclear reactor systems Jun. 30, 1992
5102616 Full pressure passive emergency core cooling and residual heat removal system for water cooled nuclear reactors Apr. 7, 1992
5094801 Two piece pressurizer heater sleeve Mar. 10, 1992
5091140 Method of replacing a heater nozzle in a nuclear reactor pressurizer Feb. 25, 1992
5089216 System for chemical decontamination of nuclear reactor primary systems Feb. 18, 1992
5089218 Water cooled nuclear reactor with a diaphragm pressurizers for low pressures and temperatures Feb. 18, 1992
5070600 Tool positioning assembly Dec. 10, 1991
5061433 Process for the replacement of a heating rod of a pressurizer of a pressurized-water nuclear reactor Oct. 29, 1991
5053190 Water cooled nuclear reactor and pressurizer assembly Oct. 1, 1991
5015436 Water-cooled direct cycle nuclear power plant May. 14, 1991
5006303 Nuclear power plant Apr. 9, 1991
4865802 Accumulator Sep. 12, 1989
4859401 Nuclear reactor Aug. 22, 1989
4728485 Method for regulating the pressure of the primary circuit during the shut-down phases of a pressurized water nuclear reactor Mar. 1, 1988
4728486 Pressurized water nuclear reactor pressure control system and method of operating same Mar. 1, 1988
4717532 Pressure control system for a pressurized water nuclear reactor plant Jan. 5, 1988
4707002 Method and device for connecting a submersible element to an enclosure under very high pressure Nov. 17, 1987
4692297 Control of nuclear reactor power plant on occurrence of rupture in coolant tubes Sep. 8, 1987
4682725 Process of replacing a sleeve mounted within a pipe Jul. 28, 1987
4673546 Pressurizer loop seal insulation assembly Jun. 16, 1987
4668038 Safety grade pressurizer heater power supply connector assembly May. 26, 1987
4664877 Passive depressurization system May. 12, 1987
4660510 Model steam generator having a thermosyphon heating means Apr. 28, 1987
4635589 Model steam generator having an improved feedwater system Jan. 13, 1987
4629601 Stirrup-type support structure for nuclear power plant pressurizer valves Dec. 16, 1986
4608224 Nuclear reactor cooled by a liquid metal Aug. 26, 1986
4600554 Secondary heat transfer circuit for a nuclear reactor cooled by a liquid metal such as sodium, as well as a steam generator particularly suitable for such a circuit Jul. 15, 1986
4588548 Pressurizer passive steam relief and quench spray system May. 13, 1986
4584164 Valve control for low temperature overpressure protection in a nuclear power plant Apr. 22, 1986
4576788 Straddle-type support structure for nuclear power plant pressurizer valves Mar. 18, 1986

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