reactor vessel
Very lowTechnical / Specialised
Definition
Meaning
The large, robust, sealed container that holds the nuclear reactor core and coolant in a nuclear power plant.
Any large pressure vessel designed to contain intense chemical reactions, most commonly a nuclear fission reaction.
Linguistics
Semantic Notes
Always refers to a major engineered component in a nuclear facility; not used metaphorically in general language. It is a specific type of 'pressure vessel'.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Spelling of related terms (e.g., 'pressurised' vs. 'pressurized') may follow regional conventions in technical documents.
Connotations
Strongly associated with nuclear technology, safety concerns, and high-level engineering in both regions.
Frequency
Exclusively used within the fields of nuclear engineering, energy policy, and related safety regulation. Almost non-existent in everyday speech.
Vocabulary
Collocations
Grammar
Valency Patterns
[The/Our] reactor vessel contains...They inspected/welded/certified the reactor vessel.A leak was detected in the reactor vessel.The design of the reactor vessel is...Pressure within the reactor vessel increased.Vocabulary
Synonyms
Strong
Neutral
Weak
Usage
Context Usage
Business
Used in high-stakes contracts, insurance, and risk assessment for the energy sector.
Academic
Central term in nuclear engineering papers, safety studies, and material science research on irradiation.
Everyday
Virtually never used; encountered only in news reports about nuclear accidents or plant construction.
Technical
Precise term for a key safety-critical component; specifications include material grade, dimensions, pressure rating, and inspection protocols.
Examples
By Part of Speech
adjective
British English
- Reactor-vessel integrity is paramount.
- The reactor-vessel head was removed for maintenance.
American English
- Reactor vessel integrity is paramount.
- The reactor vessel head was removed for maintenance.
Examples
By CEFR Level
- The reactor vessel is a very important part of a nuclear power station.
- It is made of very thick steel.
- Engineers continuously monitor the pressure and temperature inside the reactor vessel.
- During refuelling, the lid of the reactor vessel is removed.
- The reactor vessel's steel can become embrittled by years of neutron irradiation, a key factor in assessing a plant's lifespan.
- Ultrasonic testing revealed a flaw in the weld seam of the primary reactor vessel.
Learning
Memory Aids
Mnemonic
Think: The REACTOR is the heart, the VESSEL is the strong, protective body that holds it.
Conceptual Metaphor
A FORTRESS or SHIELD for the dangerous reaction.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid confusing it with 'реактор' (reactor) alone; the full term is 'корпус реактора'.
- Do not translate 'vessel' as 'сосуд' in its everyday sense (like a kitchen bowl); here it is a 'корпус' or 'ёмкость'.
- The phrase is a fixed technical compound; translating word-for-word as 'реакторное судно' would be incorrect and imply a ship.
Common Mistakes
- Misspelling as 'reactor vessle'.
- Using 'reactor' alone when the specific containment vessel is meant.
- Confusing it with the larger 'containment building' that houses it.
Practice
Quiz
What is the primary function of a reactor vessel?
FAQ
Frequently Asked Questions
No. The reactor vessel is the inner steel container holding the core. The containment building is the much larger outer concrete and steel structure that encloses the entire reactor system for safety.
No. A commercial nuclear reactor vessel is not designed to and cannot undergo a nuclear explosion. Severe accidents involve meltdowns or pressure breaches due to overheating, not explosive fission chain reactions.
It is constructed from high-grade, low-alloy steel, often with a stainless steel cladding on the interior to resist corrosion.
Because it is a highly specialised term specific to nuclear engineering. The average person has no need to refer to this component outside of technical or news contexts related to nuclear power.