thermal reactor: meaning, definition, pronunciation and examples
LowTechnical/Scientific
Quick answer
What does “thermal reactor” mean?
A type of nuclear reactor that uses slow (thermal) neutrons to sustain a fission chain reaction.
Audio
Pronunciation
Definition
Meaning and Definition
A type of nuclear reactor that uses slow (thermal) neutrons to sustain a fission chain reaction.
In common parlance, it can refer to any reactor, though 'thermal' is a specific technical qualifier distinguishing it from fast-neutron reactors. It may also be used metaphorically in very niche contexts to describe a system that generates heat from a contained reaction.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Usage is identical in technical contexts.
Connotations
Neutral and purely technical in both varieties.
Frequency
Equally low frequency in both, confined to nuclear engineering, physics, and related policy discussions.
Grammar
How to Use “thermal reactor” in a Sentence
[The/This/Our] thermal reactor [verbs: operates, uses, produces, requires]Vocabulary
Collocations
Examples
Examples of “thermal reactor” in a Sentence
noun
British English
- The advanced gas-cooled thermal reactor was a significant part of the UK's nuclear fleet.
- Moderator choice is critical for a thermal reactor's efficiency.
American English
- The majority of commercial power plants in the US are light-water thermal reactors.
- The report compared the waste profiles of thermal and fast reactors.
Usage
Meaning in Context
Business
Used in reports for energy companies or investment in nuclear power.
Academic
Common in physics, engineering textbooks, and research papers on neutronics.
Everyday
Rare. A non-specialist might simply say 'nuclear reactor'.
Technical
The primary context, specifying reactor physics design.
Vocabulary
Synonyms of “thermal reactor”
Neutral
Weak
Vocabulary
Antonyms of “thermal reactor”
Watch out
Common Mistakes When Using “thermal reactor”
- Using 'thermal reactor' to refer to any heat-producing device (e.g., a furnace).
- Confusing it with 'thermonuclear reactor' (fusion).
- Misspelling as 'thermo reactor'.
- Using it as a general synonym for 'nuclear reactor' without the technical distinction.
FAQ
Frequently Asked Questions
No. It is a specific subtype that uses slow (thermal) neutrons. While many common power reactors are thermal reactors, the term is technically precise and contrasts with 'fast reactor'.
It is theoretically possible but highly unusual and inefficient. Breeder reactors almost exclusively use fast neutrons to convert fertile material into fissile fuel effectively.
The Pressurized Water Reactor (PWR) is the most common type of thermal reactor globally, using ordinary water as both coolant and neutron moderator.
Fissile nuclei like Uranium-235 are much more likely to fission when struck by slow (thermal) neutrons. The moderator's role is to slow down the fast neutrons produced by fission without absorbing them, sustaining the chain reaction.
A type of nuclear reactor that uses slow (thermal) neutrons to sustain a fission chain reaction.
Thermal reactor is usually technical/scientific in register.
Thermal reactor: in British English it is pronounced /ˈθɜːməl riˈæk.tə/, and in American English it is pronounced /ˈθɝːməl riˈæk.tɚ/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of 'thermal' as relating to heat energy. A thermal reactor uses neutrons that have been slowed to thermal energy levels by a moderator to efficiently cause fission.
Conceptual Metaphor
A CONTROLLED HEART: The reactor core is the heart, the moderator (like water or graphite) calms the neutrons (like slowing a pulse), allowing for a sustained, manageable reaction that generates heat.
Practice
Quiz
What is the primary technical function of the 'thermal' in 'thermal reactor'?