G21C 9/02
Means for effecting very rapid reduction of the reactivity factor under fault
Official title: Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; {Control elements having arrangements activated in an emergency}(control elements per se G21C7/00)
G21C9/02 (Means for effecting very rapid reduction of the reactivity factor under fault) appears on 192 US grants and 142 published applications in this corpus.
Search patents in G21C- Granted patents
- 192
- Published applications
- 142
- Assignees
- 101
- Inventors
- 475
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 8 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 8 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 4 |
| 2004 | 2 | 1 |
| 2005 | 2 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 3 |
| 2011 | 2 | 2 |
| 2012 | 0 | 5 |
| 2013 | 1 | 5 |
| 2014 | 3 | 6 |
| 2015 | 2 | 5 |
| 2016 | 5 | 8 |
| 2017 | 5 | 6 |
| 2018 | 6 | 19 |
| 2019 | 10 | 3 |
| 2020 | 16 | 17 |
| 2021 | 12 | 8 |
| 2022 | 14 | 9 |
| 2023 | 7 | 9 |
| 2024 | 4 | 9 |
| 2025 | 4 | 10 |
| 2026 | 8 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Refillable volatile composition dispenser18 Aug 2026US 12,708,691 B2The Procter & Gamble Company
- Control rod damping system7 Jul 2026US 12,676,246 B2NuScale Power, LLC
- Nuclear reactor and method of opening a nuclear reactor16 Jun 2026US 12,658,331 B2Rolls-Royce Smr Limited
- Nuclear reactor protection systems and methods7 Apr 2026US 12,597,529 B2NuScale Power, LLC
- Micro nuclear reactor having a heat pipe extending into a core comprising fuel particles mixed with moderator particles, where the particles can be gravity discharged from the core through a bottom outlet17 Mar 2026US 12,580,088 B2Seoul National University R&Db Foundation
- Molten salt reactor and molten salt reactor system17 Sep 2026US 2026/0279605 A1Iucf-Hyu (Industry-University Cooperation Foundation Hanyang
- Bubble-enhanced natural convection reactor flow10 Sep 2026US 2026/0269095 A1
- Gas management systems for a molten salt nuclear reactor30 Jul 2026US 2026/0221298 A1Abilene Christian University
- Temperature activated passive shutdown device for a nuclear reactor16 Jul 2026US 2026/0204443 A1Moltex Energy Ltd
- Nuclear reactor protection systems and methods4 Jun 2026US 2026/0155267 A1NuScale Power, LLC
Most cited
By later US patents
- Underground nuclear power station using self-regulating heat-pipe controlled reactors98US 4,851,183 AThe United States of America as represented by the United States Department of Energy · 1989
- Safety design for nuclear power plants47US 4,971,752 A1990
- Full pressure passive emergency core cooling and residual heat removal system for water cooled nuclear reactors47US 5,102,616 ARolls-Royce and Associates Limited · 1992
- Method and device for restoring the fall-time of at least one control cluster for regulating reactivity in the core of a light-water-cooled nuclear reactor34US 6,865,242 B2Framatome ANP GmbH · 2005
- Reactivity control system and method25US 5,130,078 AGeneral Electric Company · 1992