Patents by Inventor Indresh Rampall
Indresh Rampall has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230117993Abstract: A neutron absorbing insert for use in a fuel rack. In one aspect, the insert includes: a plate structure having a first wall and a second wall that is non-coplanar to the first wall; the first and second walls being formed by a single panel of a metal matrix composite having neutron absorbing particulate reinforcement that is bent into the non-coplanar arrangement along a crease; and a plurality of spaced-apart holes formed into the single panel along the crease prior to bending.Type: ApplicationFiled: December 20, 2022Publication date: April 20, 2023Inventors: Krishna P. SINGH, Evan ROSENBAUM, Thomas G. HAYNES, III, John D. GRIFFITHS, Debabrata MITRA-MAJUMDAR, Indresh RAMPALL, Joseph Gerald Leo RAJKUMAR
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Publication number: 20230080268Abstract: A vertical bundle air-cooled heat exchanger, a finned tube assembly for an air cooled condenser and method for forming the same, and a system for removing thermal energy generated by radioactive materials. In one aspect, an air cooled condenser sized for industrial and commercial application includes an inlet steam distribution header for conveying steam, a condensate outlet header for conveying condensate, an array of tube bundles each having a plurality of finned tube assemblies having a bare steel tube with an exposed outer surface and a set of aluminum fins brazed directly onto the tube by a brazing filler metal. The steel tubes may be spaced apart by the aluminum fins and have an inlet end fluidly coupled to the inlet steam distribution header and an outlet end fluidly coupled to the outlet header. A forced draft fan may be arranged to blow air through the tube bundles.Type: ApplicationFiled: November 7, 2022Publication date: March 16, 2023Inventors: Krishna P. SINGH, Joseph Gerald Leo RAJKUMAR, Indresh RAMPALL, Frank David SANDERLIN, William G. SCHOLFIELD, Dmitriy Yakov KATS, Joseph Paul MOSHER, Robert Charles SLOAN, Thomas G. HAYNES, III
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Patent number: 11569001Abstract: A neutron absorbing insert for use in a fuel rack. In one aspect, the insert includes: a plate structure having a first wall and a second wall that is non-coplanar to the first wall; the first and second walls being formed by a single panel of a metal matrix composite having neutron absorbing particulate reinforcement that is bent into the non-coplanar arrangement along a crease; and a plurality of spaced-apart holes formed into the single panel along the crease prior to bending.Type: GrantFiled: November 12, 2020Date of Patent: January 31, 2023Inventors: Krishna P. Singh, Indresh Rampall, Joseph Gerald Leo Rajkumar
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Publication number: 20220404104Abstract: A thermal energy storage system includes one or more containment vessel comprising an internal cavity containing a bed of phase change material (PCM) operable to store thermal energy, an array of heaters embedded in the molten phase change material, and a tube bundle. The heaters are electrically coupled to an electric power source and operable to heat and melt the PCM to a molten state. The tube bundle comprises heat exchanger tubes embedded in the molten PCM and configured to convey a working fluid (e.g., water or other) through a tube-side of the tubes. The tubes may be arranged in plural individual tube cartridge each insertable and removable from the vessel. In operation, the working fluid is heated by absorbing stored thermal energy from the molten phase change material. The PCM may be heated by power extracted from the power grid during off-peak demand periods.Type: ApplicationFiled: June 10, 2022Publication date: December 22, 2022Applicant: HOLTEC INTERNATIONALInventors: Krishna P. SINGH, Indresh RAMPALL, Stephen J. AGACE
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Patent number: 11393598Abstract: A nuclear reactor support system that, in one embodiment, includes a reactor vessel, a reactor core disposed within the reactor vessel, an upper portion of the reactor vessel located above a ground plane and a lower portion of the reactor vessel located below the ground plane. The support system further includes a first flange fixedly attached to the upper portion of the reactor vessel and contacting the ground plane, the first flange supporting the reactor vessel, a second flange fixedly attached to the upper portion of the reactor vessel above the ground plane, the second flange spaced vertically apart from the first flange, and a plurality of welded lugs extending vertically between the first and second flanges. The first flange supports the entire weight of the reactor vessel in a cantilevered manner.Type: GrantFiled: July 28, 2020Date of Patent: July 19, 2022Inventors: Krishna P. Singh, P. Stephan Anton, Ranga Nadig, Indresh Rampall
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Patent number: 11289219Abstract: A nuclear reactor in one embodiment includes a cylindrical body having an internal cavity, a nuclear fuel core, and a shroud disposed in the cavity. The shroud comprises an inner shell, an outer shell, and a plurality of intermediate shells disposed between the inner and outer shells. Pluralities of annular cavities are formed between the inner and outer shells which are filled with primary coolant such as demineralized water. The coolant-filled annular cavities may be sealed at the top and bottom and provide an insulating effect to the shroud. In one embodiment, the shroud may comprise a plurality of vertically-stacked self-supported shroud segments which are coupled together.Type: GrantFiled: November 25, 2019Date of Patent: March 29, 2022Inventors: Krishna P. Singh, Indresh Rampall, Joseph Gerald Leo Rajkumar
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Publication number: 20210225537Abstract: A neutron absorbing insert for use in a fuel rack. In one aspect, the insert includes: a plate structure having a first wall and a second wall that is non-coplanar to the first wall; the first and second walls being formed by a single panel of a metal matrix composite having neutron absorbing particulate reinforcement that is bent into the non-coplanar arrangement along a crease; and a plurality of spaced-apart holes formed into the single panel along the crease prior to bending.Type: ApplicationFiled: November 12, 2020Publication date: July 22, 2021Inventors: Krishna P. SINGH, Evan ROSENBAUM, Thomas G. HAYNES, III, John D. GRIFFITHS, Debabrata MITRA-MAJUMDAR, Indresh RAMPALL, Joseph Gerald Leo RAJKUMAR
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Publication number: 20210210221Abstract: Portable nuclear fuel cartridge comprising a unitary support structure and plurality of nuclear fuel assemblies that collectively form a nuclear fuel core. Control rod drive system for a nuclear reactor. A nuclear steam supply system having a shutdown system for removing residual decay heat generated by a nuclear fuel core. A nuclear reactor including a cylindrical body having an internal cavity, nuclear fuel core, and a shroud disposed in the cavity. A nuclear reactor cooling system with passive cooling capabilities operable during a loss-of-coolant accident (LOCA) without available electric power.Type: ApplicationFiled: October 27, 2020Publication date: July 8, 2021Inventors: Krishna P. SINGH, P. Stefan ANTON, Peter STEFANOVIC, Patrick INGRAVALLO, Leyland VANN, Joseph Gerald Leo RAJKUMAR, Indresh RAMPALL
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Publication number: 20210050122Abstract: A nuclear reactor system that, in one embodiment, utilizes natural circulation to circulate a primary coolant in a single-phase through a reactor core and a heat exchange sub-system. The heat exchange sub-system is located outside of the nuclear reactor pressure vessels and, in some embodiments, is designed so as to not cause any substantial pressure drop in the flow of the primary coolant within the heat exchange sub-system that is used to vaporize a secondary coolant. In another embodiment, a nuclear reactor system is disclosed in which the reactor core is located below ground and all penetrations into the reactor pressure vessel are located above ground.Type: ApplicationFiled: July 28, 2020Publication date: February 18, 2021Inventors: Krishna P. Singh, P. Stephan Anton, Ranga Nadig, Indresh Rampall
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Publication number: 20210031315Abstract: A vertical bundle air-cooled heat exchanger, a finned tube assembly for an air cooled condenser and method for forming the same, and a system for removing thermal energy generated by radioactive materials. In one aspect, an air cooled condenser sized for industrial and commercial application includes an inlet steam distribution header for conveying steam, a condensate outlet header for conveying condensate, an array of tube bundles each having a plurality of finned tube assemblies having a bare steel tube with an exposed outer surface and a set of aluminum fins brazed directly onto the tube by a brazing filler metal. The steel tubes may be spaced apart by the aluminum fins and have an inlet end fluidly coupled to the inlet steam distribution header and an outlet end fluidly coupled to the outlet header. A forced draft fan may be arranged to blow air through the tube bundles.Type: ApplicationFiled: October 19, 2020Publication date: February 4, 2021Inventors: Krishna P. SINGH, Joseph Gerald Leo RAJKUMAR, Indresh RAMPALL, Frank David SANDERLIN, William G. SCHOLFIELD, Dmitriy Yakov KATS, Joseph Paul MOSHER, Robert Charles SLOAN, Thomas G. HAYNES, III
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Patent number: 10726962Abstract: A nuclear reactor system that, in one embodiment, utilizes natural circulation to circulate a primary coolant in a single-phase through a reactor core and a heat exchange sub-system. The heat exchange subsystem is located outside of the nuclear reactor pressure vessels and, in some embodiments, is designed so as to not cause any substantial pressure drop in the flow of the primary coolant within the heat exchange sub-system that is used to vaporize a secondary coolant. In another embodiment, a nuclear reactor system is disclosed in which the reactor core is located below ground and all penetrations into the reactor pressure vessel are located above ground.Type: GrantFiled: January 24, 2017Date of Patent: July 28, 2020Assignee: SMR INVENTEC, LLCInventors: Krishna P. Singh, P. Stephan Anton, Ranga Nadig, Indresh Rampall
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Publication number: 20200135349Abstract: A nuclear reactor in one embodiment includes a cylindrical body having an internal cavity, a nuclear fuel core, and a shroud disposed in the cavity. The shroud comprises an inner shell, an outer shell, and a plurality of intermediate shells disposed between the inner and outer shells. Pluralities of annular cavities are formed between the inner and outer shells which are filled with primary coolant such as demineralized water. The coolant-filled annular cavities may be sealed at the top and bottom and provide an insulating effect to the shroud. In one embodiment, the shroud may comprise a plurality of vertically-stacked self-supported shroud segments which are coupled together.Type: ApplicationFiled: November 25, 2019Publication date: April 30, 2020Inventors: Krishna P. Singh, Indresh Rampall, Joseph Gerald Leo Rajkumar
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Patent number: 10580539Abstract: A nuclear reactor in one embodiment includes a cylindrical body having an internal cavity, a nuclear fuel core, and a shroud disposed in the cavity. The shroud comprises an inner shell, an outer shell, and a plurality of intermediate shells disposed between the inner and outer shells. Pluralities of annular cavities are formed between the inner and outer shells which are filled with primary coolant such as demineralized water. The coolant-filled annular cavities may be sealed at the top and bottom and provide an insulating effect to the shroud. In one embodiment, the shroud may comprise a plurality of vertically-stacked self-supported shroud segments which are coupled together.Type: GrantFiled: September 26, 2017Date of Patent: March 3, 2020Assignee: SMR INVENTEC, LLCInventors: Krishna P. Singh, Indresh Rampall, Joseph Gerald Leo Rajkumar
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Publication number: 20200049030Abstract: An autonomous self-powered system for cooling radioactive materials comprising: a pool of liquid; a closed-loop fluid circuit comprising a working fluid having a boiling temperature that is less than a boiling temperature of the liquid of the pool, the closed-loop fluid circuit comprising, in operable fluid coupling, an evaporative heat exchanger at least partially immersed in the liquid of the pool, a turbogenerator, and a condenser; one or more forced flow units operably coupled to the closed-loop fluid circuit to induce flow of the working fluid through the closed-loop fluid circuit; and the closed-loop fluid circuit converting thermal energy extracted from the liquid of the pool into electrical energy in accordance with the Rankine Cycle, the electrical energy powering the one or more forced flow units.Type: ApplicationFiled: October 4, 2019Publication date: February 13, 2020Applicant: Holtec InternationalInventors: Krishna P. Singh, Indresh Rampall, Joseph Rajkumar
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Patent number: 10472996Abstract: An autonomous self-powered system for cooling radioactive materials comprising: a pool of liquid; a closed-loop fluid circuit comprising a working fluid having a boiling temperature that is less than a boiling temperature of the liquid of the pool, the closed-loop fluid circuit comprising, in operable fluid coupling, an evaporative heat exchanger at least partially immersed in the liquid of the pool, a turbogenerator, and a condenser; one or more forced flow units operably coupled to the closed-loop fluid circuit to induce flow of the working fluid through the closed-loop fluid circuit; and the closed-loop fluid circuit converting thermal energy extracted from the liquid of the pool into electrical energy in accordance with the Rankine Cycle, the electrical energy powering the one or more forced flow units.Type: GrantFiled: September 25, 2017Date of Patent: November 12, 2019Assignee: HOLTEC INTERNATIONALInventors: Krishna P. Singh, Indresh Rampall, Joseph Rajkumar
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Publication number: 20190283191Abstract: A vertical bundle air-cooled heat exchanger. In one embodiment, the invention can be a vertical bundle air-cooled condenser comprising: at least one tube bundle assembly comprising: a tube bundle comprising a plurality of finned tubes arranged in a substantially vertical and side-by-side orientation, each of the plurality of finned tubes comprising a cavity; a top header pipe comprising an inlet header cavity operably coupled to a source of steam; a bottom header pipe comprising an outlet header cavity for collecting condensate; top ends of the plurality of finned tubes coupled to the top header pipe and the bottom ends of the plurality of finned tubes coupled to the bottom header pipe; and a shell having an open top end and open bottom end, the at least one tube bundle assembly positioned within the shell.Type: ApplicationFiled: June 5, 2019Publication date: September 19, 2019Inventors: Krishna P. Singh, Indresh Rampall, Joseph Gerald Leo Rajkumar, Frank David Sanderlin
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Patent number: 10343240Abstract: A vertical bundle air-cooled heat exchanger. In one embodiment, the invention can be a vertical bundle air-cooled condenser comprising: at least one tube bundle assembly comprising: a tube bundle comprising a plurality of finned tubes arranged in a substantially vertical and side-by-side orientation, each of the plurality of finned tubes comprising a cavity; a top header pipe comprising an inlet header cavity operably coupled to a source of steam; a bottom header pipe comprising an outlet header cavity for collecting condensate; top ends of the plurality of finned tubes coupled to the top header pipe and the bottom ends of the plurality of finned tubes coupled to the bottom header pipe; and a shell having an open top end and open bottom end, the at least one tube bundle assembly positioned within the shell.Type: GrantFiled: September 26, 2017Date of Patent: July 9, 2019Inventors: Krishna P. Singh, Indresh Rampall, Joseph Rajkumar, Frank David Sanderlin
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Patent number: 10161683Abstract: An indirect dry cooling system suitable for steam condensing applications in a power plant Rankine cycle in one embodiment includes an air cooled condenser having a plurality of interconnected modular cooling cells. Each cell comprises a blower and tube bundle assemblies each including inlet headers, outlet headers, and plurality of tubes extending between the headers. In one embodiment, the tube bundle assemblies may be shop fabricated as a unit to form an A-frame or V-frame cell construction The tubes may be finned. Steam circulating in a closed flow loop on the tube side from a steam turbine is cooled in each cell by ambient air blown through the tube bundles, thereby forming liquid condensate. The condensate is collected and returned to the Rankine cycle for reheating to form steam to drive the turbine.Type: GrantFiled: September 21, 2016Date of Patent: December 25, 2018Inventors: Krishna P. Singh, Vytautas Vincas Maciunas, Indresh Rampall
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Patent number: 10132568Abstract: An indirect dry cooling system suitable for steam condensing applications in a power plant Rankine cycle includes an air blast chiller having a plurality of interconnected modular cooler cells. Each cell includes a blower and tube bundle including inlet headers, outlet headers, and plurality of tubes extending between the headers. In one embodiment, the tube bundles form an A-frame cell construction being structurally self-supporting from a base. Each of the tubes may be finned. Cooling water circulating in a closed flow loop on the tube side between the air blast chiller and turbine steam condenser is cooled by ambient air blown through the tube bundles. The cooled water flows through a second tube bundle in the condenser which condenses steam. The heated cooling water returns through the air blast chiller to complete the cooling water cycle.Type: GrantFiled: August 22, 2016Date of Patent: November 20, 2018Inventors: Krishna P. Singh, Vytautas Vincas Maciunas, Indresh Rampall
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Publication number: 20180068751Abstract: A nuclear reactor in one embodiment includes a cylindrical body having an internal cavity, a nuclear fuel core, and a shroud disposed in the cavity. The shroud comprises an inner shell, an outer shell, and a plurality of intermediate shells disposed between the inner and outer shells. Pluralities of annular cavities are formed between the inner and outer shells which are filled with primary coolant such as demineralized water. The coolant-filled annular cavities may be sealed at the top and bottom and provide an insulating effect to the shroud. In one embodiment, the shroud may comprise a plurality of vertically-stacked self-supported shroud segments which are coupled together.Type: ApplicationFiled: September 26, 2017Publication date: March 8, 2018Inventors: Krishna P. Singh, Indresh Rampall, Joseph Gerald Leo Rajkumar