The following list contains patents held by Holtec International that have been granted or are in process:

TitleYearEquipment TypeDocketPatent No.Statushf:tags
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
Ventilated Cask for Nuclear Waste Storage2023HOL-148US 11,735,327 B2Grantedhi-storm-fw
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
An Impact Amelioration Device to Minimize Deceleration Loads from Colliding Hard Surfaces2023HOL-133US 11,721,447 B2Grantedtransfer-cask
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 B2Grantedumax
Nuclear Fuel Storage System with Integral Shimming2023HOL-132US 11,289,229 B2, US 11,670,430 B2Grantedfuel-basket
Storage and Transport Cask for Nuclear Waste2023HOL-135US 11,373,775 B2, US 11,610,696 B2Grantedhi-star
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
Radiation Shielded Enclosure for Spent Nuclear Fuel Cask2022HOL-130US 11,521,761 B2Grantedshield-jacket
Method of Retrofitting a Spent Nuclear Fuel Storage System2022HOL-085US 10,867,714 B2, US 10,297,356 B2, US 9,640,289 B2, EP 3134900, US 11,515,054 B2Grantedcompact-fuel-dehydrator
Flow Baffles for Shell and Tube Heat Exchangers2022HOL-119US 11,512,902 B2Grantedheat-exchanger
Nuclear Waste Storage Canisters, Welds, and Method of Fabricating the Same2022HOL-105US 11,515,056 B2, CN ZL2016800621786Grantedmpc
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
Storage System for Radioactive Nuclear Waste with Pressure Surge Protection2022HOL-137US 11,443,862 B2Grantedfuel-basket
A Novel Impact Limiter Embodiment for Transport Casks for Radioactive Materials and a Thermal Shield Design to Protect the Cask’s Containment Seals during the Postulated Design Basis Fire Event2022Provisional
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-160
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
A Device to Prevent Rattling of Free-Standing Components Under Earthquake or other Vibratory Loads2022HOL-14263/176,496Pendinghi-storm-umax
Nuclear Reactor Shroud2022HOL-080US 11,289,219 B2, US 9,773,576 B2, US 10,580,539 B2, EP 2 962 306 B1Grantedsmr-160
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-160
Heat Exchanger for Severe Service Conditions2021HOL-116US 11,187,471 B2, CN ZL2018800462204Provisionalheat-exchanger
Fuel Storage Device with Prismatic Hexagonal or Rectangular Cross-Section Cells2021HOL-14963/271,849Pendingfuel-rack
Steam Generator for Nuclear Steam Supply System2021HOL-083US 11,120,920 B2, US 10,510,452, US 10,395,783 B2Grantedsmr-160
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-160
Nuclear Waste Cask with Impact Protection2021HOL-131US 11,081,249 B2Grantedhi-star-100
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-160
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
Stacked Column of Vertical Ventilated Modules to Store Canisters Contained Used Nuclear Fuel or High-Level Waste2021HOL-14563/189,383Pendinghi-storm-umax
Vertical Ventilated Storage Module for High-Level Waste with Canisters Arrayed on Subterranean Support Pad2021HOL-14663/189,423Pendinghi-storm-umax
Harnessing Decay Heat Produced by Spent Nuclear Fuel Stored in Plant to Conserve Energy2021HOL-14363/178,000Pendingwet-storage
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
Nuclear Fuel Core, Nuclear Fuel Cartridge, and Methods of Fueling and/or Defueling a Nuclear Reactor2021HOL-066US 10,923,239 B2, US 9,865,363 B2Grantedsmr-160
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
Thermal Sleeve and Variable Vent Throttling to protect Used Fuel Bearing Canisters from Stress Corrosion Cracking in a Ventilated Storage System2020HOL-13863/043,812Pendingmpc
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
Atomized Pisoscale Composite Aluminum Alloy and Method Thereof2020HOL-045US 10,676,805 B2, US 10,202,674 B2, US 9,551,048 B2, EU 2081713Grantedmetamic-ht
Component Cooling Water System for Nuclear Power Plant2020, HOL-070US 10,672,523 B2, US 9,786,394 B2Grantedccw smr-160
Space Saver Flanged Joint for a Nuclear Reactor Vessel2020HOL-062US 10,665,357 B2, US 9,892,806 B2Grantedsmr-160
Loss-of-Coolant Accident Reactor Cooling System2020HOL-082US 10,665,354 B2, US 10,069,389 B2, JP 6454692, EP 3005374Grantedsmr-160
Rack for Underwater Storage of Spent Nuclear Fuel2020HOL-093US 10,650,933 B2, CN ZL2015800601538, KR 10-232322, KR 10-2406322Grantedfuel-rack
A Device for Cooling Fan Motors Used in Induced Draft Air Cooler Condensers2020HOL-13662/986,401Pendingair-cooled-condenser
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 B2Grantedumax
A Portable Robotic Welder2019HOL-12962/887,984Pendingportable-robotic-welder
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
Air Induced-Draft Air-Cooled Condenser Amenable to Efficient On-Site Assembly2019HOL-128Provisionalair-cooled-condenser
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-160
Apparatus for Supporting Spent Nuclear Fuel2018HOL-088US 2018/0301231 A1, US 10,037,826 B2, CN 106663481Publishedhdfsr
Method for Storing Radioactive Waste, and System for Implementing the Same2018HOL-056US 10,049,777 B2Grantedhi-storm
Canister Apparatus for Dry Storage of Spent Nuclear Fuel and Method of Using the Same2018HOL-013US 2018/0277273 A1, US 8,135,107 B2, US 8,929,504, 10,026,514 B2Publisheddwc
Passively-Cooled Spent Nuclear Fuel Pool System2018HOL-069US 2018/0277264 A1, US 10,008,296 B2, US 9,786,393, US 9,916,910 B2Publishedhi-cool
Axi-Flow Baffle for Tubular Heat Exchangers2018HOL-12162/655,858Provisionalheat-exchanger
Nuclear Power Generation System2018HOL-074US 9,922,740 B2Grantedsmr-160
Apparatus for Supporting Radioactive Fuel Assemblies and Methods for Manufacturing the Same2018HOL-017US 2018/0025796 A1, US 9,728,284 B2, US 8,576,976 B2Publishedfuel-basket
A Reactivity Control Device for Storing Nuclear Fuel2018HOL-099US 9,875,819 B2Grantedhi-sert
Nuclear Steam Supply System2017HOL-061US 9,852,820 B2Grantedsmr-160
A Radioactive Material Storage Canister and Method for Sealing Same2017HOL-076US 9,779,843 B2Grantedlts-weld
Treating the External Surface of Shell-Type Stainless Steel Structures to Protect Against Stress Corrosion Cracking2017HOL-11762/551,914Provisionalmpc
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
A Multi-Cavity Canister Transfer Facility2016HOL-106Provisionalctf
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
Joining Process for Neutron Absorbing Materials2015HOL-077US 2015/0336204 A1Publishedfriction-stir-welding
Construction-Efficient Air Cooled Heat Exchanger in Outdoors Service2015HOL-104Provisionalair-cooled-heat-exchanger
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-160
Finned Tube Assemblies for Heat Exchangers2015, HOL-058US 2015/0027697 A1Publishedair-cooled-condenser hi-max
Neutron Absorbing Fuel Insert Fabrication Techniques2014HOL-095Provisionalhi-sert
System and Method for Transferring and/or Working Near a Radioactive Payload Using Shield-Gate Apparatus2014HOL-050US 9,047,996 B2, US 8,884,259 B2Grantedfilter-cask
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
Heat Exchanger Apparatus2010HOL-027US 2010/0282451 A1Publishedheat-exchange-equipment
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