Enum: ReactorTypeEnum

Nuclear reactor types based on design and operational characteristics

URI: valuesets:ReactorTypeEnum

Permissible Values

Value	Title	Meaning	Description	Coolant	Fuel Enrichment	Fuel Form	Fuel Type	Generation	Moderator	Modularity	Neutron Spectrum	Power Output	Pressure	Steam Generation	Temperature	Worldwide Count
PWR	Pressurized Water Reactor		Most common reactor type using light water under pressure	light water	3-5%				light water				high	indirect		~300
BWR	Boiling Water Reactor		Light water reactor where water boils directly in core	light water	3-5%				light water				medium	direct		~60
PHWR	Pressurized Heavy Water Reactor		Heavy water moderated and cooled reactor (CANDU type)	heavy water	natural uranium				heavy water				high	indirect		~47
LWGR	Light Water Graphite Reactor		Graphite moderated, light water cooled reactor (RBMK type)	light water	1.8-2.4%				graphite				medium	direct		~10
AGR	Advanced Gas-Cooled Reactor		Graphite moderated, CO2 gas cooled reactor	carbon dioxide	2.5-3.5%				graphite				high	indirect		~8
GCR	Gas-Cooled Reactor		Early gas-cooled reactor design (Magnox type)	carbon dioxide	natural uranium				graphite				low
FBR	Fast Breeder Reactor		Fast neutron reactor that breeds fissile material	liquid metal	15-20%				none		fast					~2
HTGR	High Temperature Gas-Cooled Reactor		Helium-cooled reactor with TRISO fuel	helium			TRISO		graphite						very high
MSR	Molten Salt Reactor		Reactor using molten salt as coolant and/or fuel	molten salt		liquid		IV
SMR	Small Modular Reactor		Small reactors designed for modular construction					III+/IV		high		<300 MWe
VHTR	Very High Temperature Reactor		Generation IV reactor for very high temperature applications	helium				IV							>950°C
SFR	Sodium-Cooled Fast Reactor		Fast reactor cooled by liquid sodium	liquid sodium				IV			fast
LFR	Lead-Cooled Fast Reactor		Fast reactor cooled by liquid lead or lead-bismuth	liquid lead				IV			fast
GFR	Gas-Cooled Fast Reactor		Fast reactor with gas cooling	helium				IV			fast
SCWR	Supercritical Water-Cooled Reactor		Reactor using supercritical water as coolant	supercritical water				IV

Slots

Name	Description
reactor_type	Nuclear reactor classification by design type

Identifier and Mapping Information

Schema Source

• from schema: https://w3id.org/linkml/valuesets

LinkML Source

name: ReactorTypeEnum
instantiates:
- valuesets_meta:ValueSetEnumDefinition
description: Nuclear reactor types based on design and operational characteristics
title: Reactor Type
from_schema: https://w3id.org/linkml/valuesets
contributors:
- orcid:0000-0002-6601-2165
- https://github.com/anthropics/claude-code
status: DRAFT
rank: 1000
permissible_values:
  PWR:
    text: PWR
    description: Most common reactor type using light water under pressure
    annotations:
      coolant:
        tag: coolant
        value: light water
      moderator:
        tag: moderator
        value: light water
      pressure:
        tag: pressure
        value: high
      steam_generation:
        tag: steam_generation
        value: indirect
      worldwide_count:
        tag: worldwide_count
        value: ~300
      fuel_enrichment:
        tag: fuel_enrichment
        value: 3-5%
    title: Pressurized Water Reactor
    aliases:
    - Pressurized Water Reactor
  BWR:
    text: BWR
    description: Light water reactor where water boils directly in core
    annotations:
      coolant:
        tag: coolant
        value: light water
      moderator:
        tag: moderator
        value: light water
      pressure:
        tag: pressure
        value: medium
      steam_generation:
        tag: steam_generation
        value: direct
      worldwide_count:
        tag: worldwide_count
        value: ~60
      fuel_enrichment:
        tag: fuel_enrichment
        value: 3-5%
    title: Boiling Water Reactor
    aliases:
    - Boiling Water Reactor
  PHWR:
    text: PHWR
    description: Heavy water moderated and cooled reactor (CANDU type)
    annotations:
      coolant:
        tag: coolant
        value: heavy water
      moderator:
        tag: moderator
        value: heavy water
      pressure:
        tag: pressure
        value: high
      steam_generation:
        tag: steam_generation
        value: indirect
      worldwide_count:
        tag: worldwide_count
        value: ~47
      fuel_enrichment:
        tag: fuel_enrichment
        value: natural uranium
    title: Pressurized Heavy Water Reactor
    aliases:
    - CANDU
    - Pressurized Heavy Water Reactor
  LWGR:
    text: LWGR
    description: Graphite moderated, light water cooled reactor (RBMK type)
    annotations:
      coolant:
        tag: coolant
        value: light water
      moderator:
        tag: moderator
        value: graphite
      pressure:
        tag: pressure
        value: medium
      steam_generation:
        tag: steam_generation
        value: direct
      worldwide_count:
        tag: worldwide_count
        value: ~10
      fuel_enrichment:
        tag: fuel_enrichment
        value: 1.8-2.4%
    title: Light Water Graphite Reactor
    aliases:
    - RBMK
    - Light Water Graphite Reactor
  AGR:
    text: AGR
    description: Graphite moderated, CO2 gas cooled reactor
    annotations:
      coolant:
        tag: coolant
        value: carbon dioxide
      moderator:
        tag: moderator
        value: graphite
      pressure:
        tag: pressure
        value: high
      steam_generation:
        tag: steam_generation
        value: indirect
      worldwide_count:
        tag: worldwide_count
        value: ~8
      fuel_enrichment:
        tag: fuel_enrichment
        value: 2.5-3.5%
    title: Advanced Gas-Cooled Reactor
    aliases:
    - Advanced Gas-Cooled Reactor
  GCR:
    text: GCR
    description: Early gas-cooled reactor design (Magnox type)
    annotations:
      coolant:
        tag: coolant
        value: carbon dioxide
      moderator:
        tag: moderator
        value: graphite
      pressure:
        tag: pressure
        value: low
      fuel_enrichment:
        tag: fuel_enrichment
        value: natural uranium
    title: Gas-Cooled Reactor
    aliases:
    - Magnox
    - Gas-Cooled Reactor
  FBR:
    text: FBR
    description: Fast neutron reactor that breeds fissile material
    annotations:
      coolant:
        tag: coolant
        value: liquid metal
      moderator:
        tag: moderator
        value: none
      neutron_spectrum:
        tag: neutron_spectrum
        value: fast
      worldwide_count:
        tag: worldwide_count
        value: ~2
      fuel_enrichment:
        tag: fuel_enrichment
        value: 15-20%
    title: Fast Breeder Reactor
    aliases:
    - Fast Breeder Reactor
    - Liquid Metal Fast Breeder Reactor
  HTGR:
    text: HTGR
    description: Helium-cooled reactor with TRISO fuel
    annotations:
      coolant:
        tag: coolant
        value: helium
      moderator:
        tag: moderator
        value: graphite
      temperature:
        tag: temperature
        value: very high
      fuel_type:
        tag: fuel_type
        value: TRISO
    title: High Temperature Gas-Cooled Reactor
    aliases:
    - High Temperature Gas-Cooled Reactor
  MSR:
    text: MSR
    description: Reactor using molten salt as coolant and/or fuel
    annotations:
      coolant:
        tag: coolant
        value: molten salt
      fuel_form:
        tag: fuel_form
        value: liquid
      generation:
        tag: generation
        value: IV
    title: Molten Salt Reactor
    aliases:
    - Molten Salt Reactor
  SMR:
    text: SMR
    description: Small reactors designed for modular construction
    annotations:
      power_output:
        tag: power_output
        value: <300 MWe
      modularity:
        tag: modularity
        value: high
      generation:
        tag: generation
        value: III+/IV
    title: Small Modular Reactor
    aliases:
    - Small Modular Reactor
  VHTR:
    text: VHTR
    description: Generation IV reactor for very high temperature applications
    annotations:
      temperature:
        tag: temperature
        value: '>950°C'
      generation:
        tag: generation
        value: IV
      coolant:
        tag: coolant
        value: helium
    title: Very High Temperature Reactor
    aliases:
    - Very High Temperature Reactor
  SFR:
    text: SFR
    description: Fast reactor cooled by liquid sodium
    annotations:
      coolant:
        tag: coolant
        value: liquid sodium
      neutron_spectrum:
        tag: neutron_spectrum
        value: fast
      generation:
        tag: generation
        value: IV
    title: Sodium-Cooled Fast Reactor
    aliases:
    - Sodium-Cooled Fast Reactor
  LFR:
    text: LFR
    description: Fast reactor cooled by liquid lead or lead-bismuth
    annotations:
      coolant:
        tag: coolant
        value: liquid lead
      neutron_spectrum:
        tag: neutron_spectrum
        value: fast
      generation:
        tag: generation
        value: IV
    title: Lead-Cooled Fast Reactor
    aliases:
    - Lead-Cooled Fast Reactor
  GFR:
    text: GFR
    description: Fast reactor with gas cooling
    annotations:
      coolant:
        tag: coolant
        value: helium
      neutron_spectrum:
        tag: neutron_spectrum
        value: fast
      generation:
        tag: generation
        value: IV
    title: Gas-Cooled Fast Reactor
    aliases:
    - Gas-Cooled Fast Reactor
  SCWR:
    text: SCWR
    description: Reactor using supercritical water as coolant
    annotations:
      coolant:
        tag: coolant
        value: supercritical water
      generation:
        tag: generation
        value: IV
    title: Supercritical Water-Cooled Reactor
    aliases:
    - Supercritical Water-Cooled Reactor