Patents

The patents listed below are held by Holtec International or its subsidiaries. All granted patents are from the USPTO; Foreign jurisdictions where the intellectual property rights have also been secured included with their US counterparts.  The last column in the table below indicates the principal subject area(s) to which the patent most directly applies.

Download
TitleYearEquipment TypeDocketPatent No.Statushf:tags
6063L +12% Boron Carbide Neutron Absorber Composition2025HOL-18363/872,458Provisionalmetamic-ht
A Horizontal Steam Generator for Pressurized Water Reactor Plant2025HOL-18463/865,801Provisionalsteam-generator
Boosting Nuclear Plant’s Output and Resiliency Using Energy Collected from the Sun2025HOL-18063/840,538Provisionalhi-therm
Fuel Rack Apparatus Having Storage Tubes Comprising Interior Flux Trap Chambers2025HOL-085US 10,867,714 B2, US 10,297,356 B2, US 9,640,289 B2, EP 3134900, US 11,515,054 B2, US 12,340,911 B2Grantedcompact-fuel-dehydrator
Design Measures to Update the Electric Output from a Power Plant2025HOL-17863/820,218Provisionalfeedwater-heaters
Tunable Seismic Isolation System for Nuclear Plant SSCs2025HOL-17763/814,077Provisionalsscs
An Innovative Structural System for Modular Nuclear Plants2025HOL-17663/812,551Provisionalsscs
Storage System for Radioactive Nuclear Waste with Pressure Surge Protection2025HOL-137US 11,443,862 B2, US 12,300,399 B2Grantedfuel-basket
A Concatenated Heat Exchanger Assembly for Deployment in a PhysicallyConstrained Space to Achieve Requisite Heat Duty Performance2025HOL-17563/782,286Provisionalheat-exchanger
Apparatus, System, and Methods for Handing Spent Nuclear Fuel2025HOL-16819/098,936Pendinghi-trac
System and Related Method for Converting Fossil-Fueled Generating Plants to Clean Energy2025HOL-156US 12,176,116 B2Grantedsmr-300
Atomized Pisoscale Composite Aluminum Alloy and Method Thereof2025HOL-045US 10,676,805 B2, US 10,202,674 B2, US 9,551,048 B2, EU 2081713, 12,226,829 B2Grantedmetamic-ht
Storage and Transport Cask for Nuclear Waste2025HOL-135US 11,373,775 B2, US 11,610,696 B2, US 12,217,881 B2Grantedhi-star
Radiation Shielded Enclosure for Spent Nuclear Fuel Cask2025HOL-130US 11,521,761 B2, US 11,798,699 B2, US 12,211,628 B2Grantedshield-jacket
Method For Ameliorating Impact Between Components of Nuclear Fuel Storage System2025HOL-133US 11,721,447 B2, US 12,198,824 B2, US 12,198,824 B2Grantedtransfer-cask
Stackable Nuclear Waste Storage System2025HOL-145US 12,191,045 B2Grantedhi-storm-umax
Nuclear Fuel Decay Heat Utilization System2025HOL-143US 12,191,042 B2Grantedwet-storage
Portable Robotic Welder For Nuclear Waste Handling2024HOL-129US 12,179,295 B2Grantedportable-robotic-welder
Automatically Adjusting Seismic Restraint System for Nuclear Fuel Storage2024HOL-142US 12,131,830 B2, US 2024/0387066 A1Grantedhi-storm-umax
Ventilated Cask for Nuclear Waste Storage2024HOL-148US 11,735,327 B2, US 12,148,541 B2Grantedhi-storm-fw
Spent Nuclear Fuel Storage Rack System2024HOL-149US 12,112,856 B2Grantedfuel-rack
Nuclear Waste Cask with Impact Protection2024HOL-131US 11,081,249 B2, US 12,080,440 B2Grantedhi-star-100
Induced Draft Air-Cooled Condenser System2024HOL-136US 12,072,151 B2Grantedair-cooled-condenser
Nuclear Waste Storage Canisters, Welds, and Method of Fabricating the Same2024HOL-105US 11,515,056 B2, CN ZL2016800621786, US 12,051,517 B2Grantedmpc
Apparatus for Supporting Radioactive Fuel Assemblies and Methods for Manufacturing the Same2024HOL-017US 12,033,764 B2, US 9,728,284 B2, US 8,576,976 B2Grantedfuel-basket
Cask with Ventilation Control for Spent Nuclear Fuel Storage2024HOL-138US 12,027,279 B2Grantedmpc
Control Rod Drive System for Nuclear Reactor2024HOL-066US 10,923,239 B2, US 9,865,363 B2, US 11,935,663 B2Grantedsmr-300
Method of Heating Primary Coolant Outside of Primary Coolant Loop During a Reactor Startup Operation2024HOL-062US 10,665,357 B2, US 9,892,806 B2, US 11,901,088 B2Grantedsmr-300
High-Density Subterranean Storage System for Nuclear Fuel and Radioactive Waste2024HOL-146US 11,881,323 B2Grantedhi-storm-umax
An Innovative Design Strategy to Protect a Nuclear Plant Steam GeneratorAgainst Earthquakes and Radiation2023HOL-16563/615,883Provisionalsmr-300
A Novel Design Approach to House a Nuclear Reactor in a Subterranean Cavity2023HOL-164-P63/615,872Provisionalsmr-300
Air-Cooled Condenser with Deflection Limiter Beams2023HOL-128US 11,796,255 B2Grantedair-cooled-condenser
System and Method for Preparing a Container Loaded with Wet Radioactive Elements for Dry Storage2023HOL-002US 10,839,969 B2, US 8,561,318, US 9,165,690 B2, US 10,229,764 B2, EP 2 227 655 B1, EP 3 364 136 B1, US 11,742,102 B2Grantedfhd
High-Density Subterranean Storage System for Nuclear Fuel and Radioactive Waste2023HOL-078US 10,950,361 B2, US 10,446,287 B2, US 9,852,822 B2, US 11,469,008 B2, US 11,728,061 B2Grantedhi-storm-cis
Fuel Basket for Spent Nuclear Fuel and Container Implementing the Same2023HOL-100US 10,854,346 B2, 10-2039918, US 11,715,575 B2Grantedmpc
System and Method of Storing and/or Transferring High Level Radioactive Waste2023HOL-060US 10,892,063 B2, US 9,831,005 B2, US 11,694,817 B2Grantedhi-storm-umax
Nuclear Fuel Storage System with Integral Shimming2023HOL-132US 11,289,229 B2, US 11,670,430 B2Grantedfuel-basket
Air-Cooled Condenser System2023HOL-118US 11,204,201 B2, US 11,604,030 B2Grantedair-cooled-condenser
Macro-Chip Reinforced Alloy2023HOL-097US 10,843,272 B2, US 11,590,573 B2Grantedmetamic-ht
Autonomous Self-Powered System for Removing Thermal Energy from Pools of Liquid Heated by Radioactive Materials2023HOL-024US 10,991,472 B2, US 8,681,924 B2, US 8,158,962 B1, US 11,569,001 B2Granteddream
Brazing Compositions and Uses Thereof2023HOL-075US 10,512,990 B2, US 11,541,484 B2Grantedair-cooled-condenser
Treating the External Surface of Shell-Type Stainless Steel Structures to Protect Against Stress Corrosion Cracking2022HOL-11762/551,914Pendingmpc
Flow Baffles for Shell and Tube Heat Exchangers2022HOL-119US 11,512,902 B2Grantedheat-exchanger
Air-Cooled Condenser and Related Methods2022HOL-048US 10,854,344 B2, US 9,786,395 B2, US 11,504,814 B2Grantedairblast-hx
Automated Eddy Current Tube Tester2022HOL-155Provisionalheat-exchanger
Cooling System for Casks Containing High Level Nuclear Waste2022HOL-127US 11,488,737 B2Grantedwet-storage
Passive Cooling Device for Casks Containing Nuclear Fuel2022HOL-126US 11,410,784 B2Grantedtransfer-cask
Nuclear Reactor Vessel Support System2022HOL-041US 11,393,598 B2, US 10,726,962 B2Grantedsmr-300
Ventilated Transfer Cask2022HOL-043US 11,373,774 B2, US 10,811,154 B2, US 9,514,853 B2, US 8,905,259 B2, US 9,396,824, US 9,831,005, US 9,442,037, US 9,779,843, US 9,466,400Grantedhi-storm
System and Methods for Storing Spent Nuclear Fuel2022HOL-014US 9,916,911 B2, US 8,098,790, US 8,625,732, US 7,068,748, US 11,342,091 B2Grantedhi-storm-100u
A Novel Technology to Convert Operating Fossil Burning Power Plants into Energy Storage and On-Demand Clean Power Generation Units2022HOL-14763/297,899Pendinggreen-boiler
Nuclear Reactor Shroud2022HOL-080US 11,289,219 B2, US 9,773,576 B2, US 10,580,539 B2, EP 2 962 306 B1Grantedsmr-300
Spent Nuclear Fuel Canister2022HOL-125US 11,289,227 B2Grantedmpc
Spent Nuclear Fuel Cask with Dose Attenuation Devices2022HOL-122US 11,282,615 B2Grantedfuel-basket
Manifold system for the ventilated storage of high level waste and a method of using the same to store high level waste in a below-grade environment2022HOL-009US 11,264,142 B2, US 10,614,924 B2, US 9,761,339 B2, US 8,718,220 B2, US 7,676,016Grantedhi-storm-100m
Nuclear Fuel Storage Facility2022HOL-018US 11,250,963 B2, US 10,373,722 B2,  US 9,443,625, US 8,351,562, US 7,933,374, US 7,330,526Grantedhi-storm
Manufacturing Methods to Fortify Nuclear Waste Canisters from Stress Corrosion Cracking2022HOL-113US 11,250,962 B2Grantedmpc
Method for Preparing Spent Nuclear Fuel for Dry Storage2022HOL-008US 11,217,353 B2, US 10,535,439 B2, US 9,761,338 B2, US 8,737,559 B2, US 8,266,823 B2, US 7,707,741 B2, EP 1 888 988 B1Grantedfhd
Dream Insert for Grand Gulf Racks2021HOL-15063/285,502Pendingdream
Optimized Nuclear Fuel Core Design for a Small Modular2021HOL-115US 11,205,521 B2Grantedsmr-300
Heat Exchanger for Severe Service Conditions2021HOL-116US 11,187,471 B2, CN ZL2018800462204Provisionalheat-exchanger
Steam Generator for Nuclear Steam Supply System2021HOL-083US 11,120,920 B2, US 10,510,452, US 10,395,783 B2Grantedsmr-300
A Fail-Safe Control Rod Drive System for Nuclear Reactor2021, HOL-067US 11,094,421 B2, US 10,573,419 B2, US 10,573,418 B2, US 9,496,057Grantedcrds smr-300
Container for Storing And/Or Transporting Spent Nuclear Fuel2021HOL-108US 11,081,248 B2, US 10,410,756 B2, EP 3264419, KR 10,2139794Grantedhi-star
Multi-Component Cask for Storage and Transport of Spent Nuclear Fuel2021HOL-123US 11,043,312 B2Grantedtransfer-cask
Method for Heating a Primary Coolant in a Nuclear Steam Supply System2021HOL-068US 11,031,146 B2, US 10,102,936 B2Grantedsmr-300
System and Method for Minimizing Movement of Nuclear Fuel Racks During a Seismic Event2021HOL-071US 11,017,908 B2, US 9,991,010 B2Grantedfuel-rack
System for Low Profile Translation of High Level Radioactive Waste2021HOL-030US 10,939,787 B2, US 10,446,285 B2, US 9,728,286 B2, US 8,345,813 B2Grantedhi-storm
Self-Aligning Neutron Absorbing Apparatus for Reactivity Mitigation in Nuclear Fuel Storage Systems2021, HOL-111US 10,910,119 B2, US 10,418,137 B2Grantedfuel-rack wet-storage
Flood and Wind Resistant Ventilated Module for Storing Used Fuel Canisters2020HOL-124US 10,878,973 B2Grantedmpc
Apparatus for Storing and/or Transporting Radioactive Materials2020HOL-107US 10,861,612 B2, US 10,515,730 B2Grantedhi-storm
High Earthquake-Resistant Fuel Storage Rack System for Fuel Pools in Nuclear Plants2020HOL-114US 10,847,274 B2, 10-2103451Grantedfuel-rack
Deeply Imbedded Ventilate Storage (DTVS) System for Used Nuclear Fuel & High-Level Waste2020HOL-13963/123,706Provisionalhi-storm-umax
Passive Reactor Cooling System2020HOL-081US 10,720,249 B2, US 9,589,685 B2, EP 2 842 135 B1, 6442489, EP 3 005 373 B1Grantedfuel-rack
Method of Storing High Level Radioactive Waste2020HOL-120US 10,714,223 B2Grantedhi-storm
Container and System for Handling Damaged Nuclear Fuel, and Method of Making the Same2020HOL-053US 10,692,617 B2, US 9,748,009 B2Granteddamaged-fuel-canister
Component Cooling Water System for Nuclear Power Plant2020, HOL-070US 10,672,523 B2, US 9,786,394 B2Grantedccw smr-300
Loss-of-Coolant Accident Reactor Cooling System2020HOL-082US 10,665,354 B2, US 10,069,389 B2, JP 6454692, EP 3005374Grantedsmr-300
Rack for Underwater Storage of Spent Nuclear Fuel2020HOL-093US 10,650,933 B2, CN ZL2015800601538, KR 10-232322, KR 10-2406322Grantedfuel-rack
Heavily Shielded Unventilated Cask for Storing Nuclear Waste2020HOL-13462/969,183Pendingmpc
Snap-in Insert for Reactivity Control in Spent Nuclear Fuel Pools and Casks2020HOL-064US 10,535,440 B2, US 9,685,248 B2Grantedvertical-air-cooled-condenser
Autonomous self-powered system for removing thermal energy from pools of liquid heated by radioactive materials, and method of the same2019HOL-047US 10,472,996 B2, US 9,803,510 B2Grantedhi-cool
Environmentally Sequestered Spent Fuel Pool2019HOL-092US 10,468,145 B2, EP 3 204 949 B1, KR 10-1956628Grantedspent-fuel-pool
System and Method for Reclaiming Energy from Heat Emanating from Spent Nuclear Fuel2019HOL-042US 10,418,136 B2, US 9,001,958 B2Grantedhi-storm-umax
Vertical Bundle Air Cooled Heat Exchanger, Method of Manufacturing the Same, and Power Generation Plant Implementing the Same2019HOL-051US 10,343,240 B2, US 9,770,794 B2Grantedair-cooled-heat-exchanger
Apparatus for Storing and/or Transporting High Level Radioactive Waste, and Method for Manufacturing the Same2019HOL-025US 10,332,642 B2Grantedhi-storm-fw
Wet Storage Facility for Nuclear Fuel2019HOL-089US 10,311,987 B2, EP 3 195 325 B1Grantedhi-west
Tubular Heat Exchanger Having Multiple Shell-Side and Tube-Side Fluid Passes2019HOL-102US 10,295,266 B2Grantedheat-exchanger
Dry Cooling System for Power Plants2018HOL-10310,161,683 B2Grantedair-blast-chiller
Ventilated System for Storing High Level Radioactive Waste2018HOL-054US 10,147,509 B2Grantedhi-storm-100u
Shutdown System for a Nuclear Steam Supply System2018HOL-073US 10,115,487 B2Grantedsmr-300
Method for Storing Radioactive Waste, and System for Implementing the Same2018HOL-056US 10,049,777 B2Grantedhi-storm
Apparatus for Supporting Spent Nuclear Fuel2018HOL-088US 10,037,826 B2, CN 106663481Grantedhdfsr
Axi-Flow Baffle for Tubular Heat Exchangers2018HOL-12162/655,858Provisionalheat-exchanger
Nuclear Power Generation System2018HOL-074US 9,922,740 B2Grantedsmr-300
A Reactivity Control Device for Storing Nuclear Fuel2018HOL-099US 9,875,819 B2Grantedhi-sert
Nuclear Steam Supply System2017HOL-061US 9,852,820 B2Grantedsmr-300
A Radioactive Material Storage Canister and Method for Sealing Same2017HOL-076US 9,779,843 B2Grantedlts-weld
Cask Apparatus, System and Method for Transporting and/or Storing High Level Waste2017HOL-011US 9,672,948 B2Grantedhi-safe
Heat Exchanger Apparatus for Converting a Shell-Side Liquid into a Vapor2017HOL-026US 9,612,058 B2, US 8,833,437 B2Grantedheat-exchange-equipment
Steam Conditioning System2017HOL-086US 9,593,598 B2Grantedsteam-sparger-device
Apparatus, System and Method for Facilitating Transfer of High Level Waste to and/or From a Spent Fuel Pool2016HOL-029US 8,277,746 B2Grantedwet-transfer
Ventilated Transfer Cask with a High Integrity Lifting Feature and an Integral Impact Limiter2016HOL-079US 9,466,400 B2Grantedhi-trac
System and Method for the Ventilated Storage of High Level Radioactive Waste in a Clustered Arrangement2016HOL-001US 9,460,821, US 8,660,230 B2Grantedhi-storm
System and Method for Storing and Leak Testing a Radioactive Materials Storage Canister2016HOL-072US 9,442,037 B2Grantedmpc
Container System for Radioactive Waste2016HOL-059US 9,396,824 B2Grantedmpc
Apparatus, System and Method for Storing High Level Waste2016HOL-007US 9,269,464 B2, US 8,712,001 B2, US 8,548,112 B2Grantedhi-star
System, Method and Apparatus for Providing Additional Radiation Shielding to High Level Radioactive Materials2015HOL-038US 9,208,914 B2, US 8,995,604 B2Grantedhi-shield
Method for Controlling Temperature of a Portion of a Radioactive Waste Storage System and for Implementing the Same2015HOL-055US 9,105,365 B2Grantedhi-storm
Storage System for Nuclear Fuel2015HOL-057US 2015/0221402 A1Publishedfuel-rack
Passive Reactor Containment Protection System2015HOL-063US 9,786,393 B2Grantedsmr-300
Method of Transferring High Level Radioactive Materials, and System for the Same2014HOL-039US 8,718,221 B2Grantedwet-transfer
Heat Exchanger for Accommodating Thermal and/or Pressure Transients2013HOL-015US 8,602,089 B2Grantedheat-exchange-equipment
Apparatus and Method for Supporting Fuel Assemblies in an Underwater Environment Having Lateral Access Loading2012HOL-004US 8,139,706 B2, US 7,715,517Grantedfuel-rack
Method of Removing Radioactive Materials from Submerged State and/or Preparing Spent Nuclear Fuel for Dry Storage2011, , HOL-016US 8,067,659 B2Grantedhi-trac transfer-cask water-jacket
Method and Apparatus for Transporting and/or Storing Radioactive Materials having a Jacket Adapted to Facilitate Thermosiphon Fluid Flow2011HOL-022US 7,994,380 B2Grantedhi-trac
Apparatus for Providing Additional Radiation Shielding to a Container Holding Radioactive Materials, and Method of Using the Same to Handle and/or Process Radioactive Materials2010HOL-012US 7,786,456 B2Grantedshielded-transfer-canister
Method and Apparatus for Maximizing Radiation Shielding During Cask Transfer Procedures2008HOL-021US 7,330,525 B2, US 6,587,536 B1Grantedhi-trac
Fin Tube Assembly for Heat Exchanger and Method2007HOL-032US 7,293,602 B2Grantedair-cooled-condenser
Forced Gas Flow Canister Dehydration2007HOL-003US 7,210,247 B2, US 7,096,600 B2Grantedfhd
Below Grade Cask Transfer Facility2006HOL-031US 7,139,358 B2, US 6,793,450 B2Grantedctf
Autonomous Cask Translocation Crane2005HOL-023US 6,957,942 B2Grantedcrane
System and Method for Transferring Spent Nuclear Fuel from a Spent Nuclear Fuel Pool to a Storage Cask2005HOL-037US 6,853,697 B2, US 6,625,246 B1Grantedmating-device
Seismic Cask Stabilization Device2005HOL-036US 6,848,223 B2Grantedhermit
Ventilated Vertical Overpack2004HOL-020US 6,718,000 B2Grantedhi-storm
Deaeration of Makeup Water in a Steam Surface Condenser2003HOL-033US 6,619,042 B2Grantedsurface-condenser
External Steam Dump2002HOL-006US 6,481,208 B1Grantedsurface-condenser
Apparatus Suitable for Transporting and Storing Nuclear Fuel Rods and Methods for Using the Apparatus2000HOL-005US 6,064,710, US 5,898,747Grantedhi-storm
Extrusion Fabrication Process for Discontinuous Carbide Particulate Metal Matrix Composites and Super Hypereutectic A1/SI2000HOL-0526,042,779Grantedmetamic-ht
Radiation Absorbing Refractory Composition1999HOL-0495,965,829Grantedmetamic