公开(公告)号：US20230117993A1

公开(公告)日：2023-04-20

申请号：US18085428

申请日：2022-12-20

Applicant: Holtec International

Inventor： Krishna P. SINGH ,  Evan ROSENBAUM ,  Thomas G. HAYNES, III ,  John D. GRIFFITHS ,  Debabrata MITRA-MAJUMDAR ,  Indresh RAMPALL ,  Joseph Gerald Leo RAJKUMAR

IPC: G21C19/07 ,  G21F1/08 ,  F22B1/16 ,  F22B37/00 ,  F22B33/18

Abstract: 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.

公开(公告)号：US20230080268A1

公开(公告)日：2023-03-16

申请号：US17982060

申请日：2022-11-07

Applicant: HOLTEC INTERNATIONAL

Inventor： 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

IPC: B23P15/26 ,  F28D7/10 ,  F28B1/06 ,  F28B9/10 ,  F28F1/16 ,  F28F1/20 ,  F28F1/00 ,  B21C23/00 ,  F28D1/02

Abstract: 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.

公开(公告)号：US20250069766A1

公开(公告)日：2025-02-27

申请号：US18947667

申请日：2024-11-14

Applicant: Holtec International

Inventor： Krishna P. SINGH ,  Indresh RAMPALL

IPC: G21D1/00 ,  F01K3/00 ,  F01K3/18 ,  F01K3/26 ,  F01K7/16 ,  F01K13/02

Abstract: A power generation system and related method for repowering a fossil-fueled power plant using a carbon-free nuclear steam supply system (NSSS) which replaces the existing fossil plant steam generator which burns fossil fuel such as coal, oil, or natural gas. The existing fossil plant energy conversion system including the turbine-generator (turbogenerator) and auxiliary components of the Rankine cycle is retained. The NSSS may include a small modular reactor (SMR) unit comprising a reactor vessel with nuclear fuel core and steam generator which receives heated primary coolant from the reactor to produce main steam to operate the Rankine cycle. The main steam output by the SMR unit is compressed in a steam compressor to increase its pressure to a level necessary to operate the turbogenerator. The compressor may be operated via a portion of the main steam. An intercooler of the compressor may be used for main steam reheating.

公开(公告)号：US20220404104A1

公开(公告)日：2022-12-22

申请号：US17837853

申请日：2022-06-10

Applicant: HOLTEC INTERNATIONAL

Inventor： Krishna P. SINGH ,  Indresh RAMPALL ,  Stephen J. AGACE

IPC: F28D20/02 ,  F22B1/02 ,  F24H7/02 ,  F22G1/00

Abstract: 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.

公开(公告)号：US20250062712A1

公开(公告)日：2025-02-20

申请号：US18939701

申请日：2024-11-07

Applicant: HOLTEC INTERNATIONAL

Inventor： Krishna P. SINGH ,  Indresh RAMPALL ,  Edward BELL

IPC: H02S10/20 ,  F24S10/70 ,  F24S20/20 ,  F24S20/40 ,  F24S23/70 ,  F24S60/10 ,  F24S80/20 ,  H02S40/44

Abstract: A hybrid solar energy power generation system includes a thermal energy storage (TES) vessel containing a thermal mass composition operable to store thermal energy, a concentrated solar power (CSP) system, and a photovoltaic (PV) power system. The CSP system heats a first working fluid flowing in first closed flow loop via a solar collector. The heated first working fluid recirculates through the TES vessel to heat the TM composition. The PV power system generates electricity which can be delivered directly to the electric power grid or alternatively when grid demand drops energizes can electric heaters to supplement heating the first working fluid. This increases the temperature and enthalpy of the first working fluid to store additional thermal energy in the TM composition. The TES vessel is operable to heat a second working fluid to produce steam usable for industrial processes, district heating, or to power a Rankine power generation cycle.

公开(公告)号：US20210225537A1

公开(公告)日：2021-07-22

申请号：US17095834

申请日：2020-11-12

Applicant: Holtec International

Inventor： Krishna P. SINGH ,  Evan ROSENBAUM ,  Thomas G. HAYNES, III ,  John D. GRIFFITHS ,  Debabrata MITRA-MAJUMDAR ,  Indresh RAMPALL ,  Joseph Gerald Leo RAJKUMAR

IPC: G21C19/07 ,  G21F1/08

Abstract: 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.

公开(公告)号：US20210031315A1

公开(公告)日：2021-02-04

申请号：US17073859

申请日：2020-10-19

Applicant: HOLTEC INTERNATIONAL

Inventor： 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

IPC: B23P15/26 ,  F28D7/10 ,  F28B1/06 ,  F28B9/10 ,  F28F1/16 ,  F28F1/20 ,  F28D1/02 ,  F28F1/00 ,  B21C23/00

Abstract: 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.