British Standards Institution

Sector: Sustainability

Overview: Under the direction of the Standards Policy and Strategy Committee, is responsible for the UK input to ISO/TC 85/SC 6 and to cover standardization in the field of nuclear power plants and research reactors

Committee standards activity

In Progress (19)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
XXXX	Proposal to establish a committee to mirror the work of ISO/TC 85/SC 6 (Reactor technology) Categories: Information management \| Standardization. General rules Proposal begins : 2023-04-28	Proposal
ISO/NP 26050	Zinc addition method for primary circuit of new pressurized water reactor Categories: Information management \| Standardization. General rules Proposal begins : 2025-07-08	Proposal
ISO/NP 25852	Reactor technology — Nuclear Power Plants — On-site Implementation of Severe Accident Management Guidelines (SAMGs) Categories: Information management \| Standardization. General rules Proposal begins : 2025-05-21	Proposal
ISO/NP 25799	Reactor technology — Pressurized water reactor — Assessment of the potential for Two-Phase-Flow-Instability in passive residual heat removal systems Categories: Information management \| Standardization. General rules Proposal begins : 2025-03-04	Proposal
ISO/NP 19327	Reactor technology -- Fusion reactors -- design and assessment of remote maintenance system for divertor of magnetic confinement fusion reactor Categories: Information management \| Standardization. General rules \| Engineering \| Energy and heat transfer engineering \| Nuclear energy engineering \| Fissile materials and nuclear fuel technology Proposal begins : 2022-11-10	Proposal
ISO/NP 19326	Reactor technology -- Fusion reactors -- Design and assessment for remotely-handled components of magnetic confinement fusion reactor Categories: Information management \| Standardization. General rules \| Engineering \| Energy and heat transfer engineering \| Nuclear energy engineering \| Fissile materials and nuclear fuel technology Proposal begins : 2022-11-10	Proposal
ISO/NP 19243	Structural design criteria for in-vessel components of magnetic confinement fusion reactor via elastic analysis method Categories: Information management \| Standardization. General rules \| Engineering \| Energy and heat transfer engineering \| Nuclear energy engineering \| Fissile materials and nuclear fuel technology Proposal begins : 2022-11-10	Proposal
BS ISO 26549	Reactor Technology - Pressurized Water Reactor - Calculation and Calibration Method for Thermal Power Categories: Unclassified documents Proposal begins :	Proposal
BS ISO 26047	Chemistry control performance indicator for pressurized water reactor nuclear power plant Categories: Unclassified documents Drafting begins : 2026-10-23	Drafting
BS ISO 25852	Reactor technology — Nuclear Power Plants — On-site Implementation of Severe Accident Management Guidelines (SAMGs) Categories: Unclassified documents Drafting begins : 2026-10-01	Drafting

Published (21)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
BS ISO 4917-6:2024	Design of nuclear power plants against seismic events. Post-seismic measures Categories: Nuclear power plants. Safety \| Seismic and vibration protection Published standard begins : 2024-02-29	Published standard
BS ISO 4917-5:2024	Design of nuclear power plants against seismic events. Seismic instrumentation Categories: Nuclear power plants. Safety \| Seismic and vibration protection Published standard begins : 2024-10-31	Published standard
BS ISO 4917-4:2024	Design of nuclear power plants against seismic events. Components Categories: Nuclear power plants. Safety \| Seismic and vibration protection Published standard begins : 2024-03-11	Published standard
BS ISO 4917-3:2024	Design of nuclear power plants against seismic events. Civil structures Categories: Nuclear power plants. Safety \| Seismic and vibration protection Published standard begins : 2024-02-29	Published standard
BS ISO 4917-1:2024	Design of nuclear power plants against seismic events. Principles Categories: Nuclear power plants. Safety \| Seismic and vibration protection Published standard begins : 2024-02-29	Published standard
BS ISO 4233:2023	Reactor technology. Nuclear fusion reactors. Hot helium leak testing method for high temperature pressure-bearing components in nuclear fusion reactors Categories: Nuclear power plants. Safety Published standard begins : 2023-03-20	Published standard
BS ISO 23468:2021	Reactor technology. Power reactor analyses and measurements. Determination of heavy water isotopic purity by Fourier transform infrared spectroscopy Categories: Reactor engineering Published standard begins : 2021-08-24	Published standard
BS ISO 23467:2020	Ice plug isolation of piping in nuclear power plant Categories: Nuclear power plants. Safety Published standard begins : 2020-12-08	Published standard
BS ISO 23466:2020	Design criteria for the thermal insulation of reactor coolant system main equipments and piping of PWR nuclear power plants Categories: Nuclear power plants. Safety Published standard begins : 2020-10-27	Published standard
BS ISO 23018:2022	Group-averaged neutron and gamma-ray cross sections for radiation protection and shielding calculations for nuclear reactors Categories: Radiation protection \| Reactor engineering Published standard begins : 2026-02-09	Published standard

Withdrawn (3)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
BS ISO 19226:2017	Nuclear energy. Determination of neutron fluence and displacement per atom (dpa) in reactor vessel and internals Categories: Reactor engineering Withdrawn begins : 2020-03-18	Withdrawn
BS ISO 18229:2018	Essential technical requirements for mechanical components and metallic structures foreseen for Generation IV nuclear reactors Categories: Reactor engineering Withdrawn begins : 2021-08-13	Withdrawn
BS ISO 18077:2018	Reload startup physics tests for pressurized water reactors Categories: Reactor engineering Withdrawn begins : 2022-12-13	Withdrawn

Message Committee Become a committee member

Committee members

Nominating organizations

AtkinsRéalis
AWE
Cavendish Nuclear Limited
Committee Manager
Deputy Chair
EDF Energy UK
Environment Agency
Framatome Limited
Holtec Britain
Kyoto Fusioneering UK Ltd
Naval Solutions Limited
Office for Nuclear Regulation
OFGEM - Office of Gas and Electricity Markets
Oxford Sigma
Rolls-Royce SMR Ltd
Tokamak Energy Ltd
United Kingdom Atomic Energy Authority
University of Liverpool

Liaisons with other committees

Individual Capacity - Design and Operations
Individual Capacity - Design, Substantiation, Siting & Construction
Individual Capacity - Reactor technology
Liaison - MCE/21
UK Expert - High integrity component design & safety
UK Expert - Non-Destructive Testing

BSI roles

Committee Chair

Standards Development

NCE/3 - Reactor technology

Committee standards activity