G21C 15/18
Emergency cooling arrangements
Official title: Emergency cooling arrangements; Removing shut-down heat
G21C15/18 (Emergency cooling arrangements) appears on 635 US grants and 520 published applications in this corpus.
Search patents in G21C- Granted patents
- 635
- Published applications
- 520
- Assignees
- 197
- Inventors
- 1,283
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 11 | 0 |
| 1978 | 12 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 3 | 0 |
| 1982 | 8 | 0 |
| 1983 | 5 | 0 |
| 1984 | 8 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 15 | 0 |
| 1988 | 13 | 0 |
| 1989 | 13 | 0 |
| 1990 | 6 | 0 |
| 1991 | 17 | 0 |
| 1992 | 25 | 0 |
| 1993 | 23 | 0 |
| 1994 | 24 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 12 | 0 |
| 1998 | 5 | 0 |
| 1999 | 8 | 0 |
| 2000 | 3 | 0 |
| 2001 | 9 | 0 |
| 2002 | 6 | 6 |
| 2003 | 1 | 5 |
| 2004 | 3 | 3 |
| 2005 | 4 | 5 |
| 2006 | 0 | 3 |
| 2007 | 3 | 4 |
| 2008 | 0 | 10 |
| 2009 | 4 | 13 |
| 2010 | 7 | 17 |
| 2011 | 13 | 10 |
| 2012 | 5 | 22 |
| 2013 | 8 | 38 |
| 2014 | 13 | 41 |
| 2015 | 12 | 26 |
| 2016 | 22 | 28 |
| 2017 | 30 | 30 |
| 2018 | 31 | 39 |
| 2019 | 30 | 24 |
| 2020 | 39 | 38 |
| 2021 | 24 | 30 |
| 2022 | 35 | 37 |
| 2023 | 24 | 30 |
| 2024 | 20 | 31 |
| 2025 | 16 | 16 |
| 2026 | 19 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for removing dousing tank of heavy water reactor structure11 Aug 2026US 12,706,226 B2Korea Hydro & Nuclear Power Co., Ltd.
- Passive condensation tank cooling system of passive auxiliary feedwater system28 Jul 2026US 12,694,997 B2Korea Hydro & Nuclear Power Co., Ltd.
- Passive heat removal system for nuclear reactors14 Jul 2026US 12,683,034 B2TerraPower, LLC
- Reactor cooling system for disaster accident, and reactor cooling method using same23 Jun 2026US 12,665,098 B2Korea Hydro & Nuclear Power Co., Ltd.
- Nuclear reactor and method of opening a nuclear reactor16 Jun 2026US 12,658,331 B2Rolls-Royce Smr Limited
- A Modular Transportable Nuclear Power Plant24 Sep 2026US 2026/0285450 A1Energie propre Prodigy Ltee / Prodigy Clean Energy Ltd.
- Malfunction prevention valve and nuclear equipment comprising same24 Sep 2026US 2026/0290634 A1Korea Atomic Energy Research Institute
- Containment vacuum breaker13 Aug 2026US 2026/0237532 A1NuScale Power, LLC
- In-situ evaporative removal of liquid metal coolant from nuclear reactor fuel rods and components25 Jun 2026US 2026/0179794 A1Aalo Holdings, Inc., dba Aalo Atomics
- Nuclear power plant18 Jun 2026US 2026/0171274 A1
Most cited
By later US patents
- Gas cooled nuclear reactor346US 4,504,439 AHochtemperatur-Reaktorbau GmbH · 1985
- Passive safety system for a pressurized water nuclear reactor81US 4,753,771 AWestinghouse Electric Corp. · 1988
- Integral PWR with diverse emergency cooling and method of operating same59US 6,795,518 B1Polytechnic of Milan · 2004
- Passive cooling system for liquid metal cooled nuclear reactors with backup coolant flow path56US 5,223,210 AGeneral Electric Company · 1993
- Nuclear power facilities55US 5,087,408 A1992