Sellafield

What Sellafield does

Sellafield Ltd is a UK government-owned entity that operates the largest nuclear site in Britain, located in Cumbria, England, and is the central counterparty for the UK's nuclear decommissioning and radioactive waste management program. Its operational remit covers decommissioning of legacy nuclear facilities, retrieval and treatment of radioactive waste, environmental remediation of contaminated land, demolition of redundant structures, and modernization of site utility infrastructure, including a £2.9 billion long-term regeneration partnership that pairs decommissioning with community and sustainability objectives. Sellafield does not sell commercial products; instead, it operates as a public-sector site operator funded by the UK government, procuring specialist services from a small set of large engineering and construction partners (AtkinsRéalis, Amentum, Costain, HOCHTIEF, Morgan Sindall) through long-dated framework agreements of up to 15 years.

Technically, the company's deployed capabilities centre on nuclear decommissioning engineering, radioactive waste management, and radiation monitoring in hazardous environments. A notable technology initiative is the February 2026 first trial of Boston Dynamics' Spot quadruped robot equipped with a custom swabbing tool, used to perform surface swabs and radiation surveys in areas unsafe for personnel, signalling a shift toward robotic reduction of human dose exposure. The firm is also modernizing its enterprise stack, planning migration from legacy SAP to cloud-based ERP. The technology footprint is operational rather than productized: there are no commercial software products, no public or partner-facing APIs, no app distribution, and no disclosed patents or proprietary software assets in the input data.

The business model is government-funded, with operating budget allocated by the UK government (via the Nuclear Decommissioning Authority) to deliver mandated clean-up outcomes. Sellafield acts as a monopsony buyer in the UK decommissioning services market, awarding multi-year framework contracts via competitive procurement. Recent framework ceilings disclosed in the input total roughly £7.9 billion across AtkinsRéalis (£4.6B), Amentum (£1.4B), Costain ($1.33B), and HOCHTIEF (£595M). Sellafield's GTM motion is therefore best characterized as enterprise field sales in reverse: long-dated, competitively tendered frameworks targeted at firms with specialized nuclear decommissioning, remediation, and waste-retrieval capabilities. Its served customer base is functionally a single sovereign buyer, and the procurement counterparty base is concentrated among a handful of large UK and international engineering groups.

Name

Sellafield

Legal name

Sellafield Ltd

Website

https://gov.uk

Company type

Private

Founded year

1947

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Sellafield Ltd is a UK government-owned entity that operates Britain's largest nuclear site in Cumbria, England, managing the decommissioning of legacy nuclear facilities, radioactive waste retrieval and treatment, and site infrastructure modernization on behalf of the UK government.

Ownership category

akta.pro rank

Product category

Nuclear Decommissioning Services

NAICS

Remediation Services (562910), Remediation and Other Waste Management Services (5629), Hazardous Waste Treatment and Disposal (562211)

SIC

Hazardous Waste Management (4955)

akta.pro primary industry

Nuclear Plant Decommissioning & Site Restoration (EUACADAJ)

akta.pro secondary industries

Decontamination & Dismantling (D&D) of Nuclear Facilities (EUAKAFAB), Demolition, Segmentation & Heavy Lift/Remote Handling (EUAKAFAD), Radioactive Waste Processing, Packaging & On-site Interim Storage (Decommissioning Waste) (EUAKAFAE), Nuclear Waste Management & Geological Disposal (EUACADAM), Facility Deactivation, Defueling Support & Transition to Decommissioning (EUAKAFAH)

Keywords

• Nuclear decommissioning
• Radioactive waste management
• Nuclear site remediation
• Hazardous environment robotics
• Nuclear waste retrieval

Headquarters

HQ city

Wales

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Supply Chain, Technology or R&D

Revenue model

1. Nuclear Decommissioning Services: Sellafield Ltd operates as a UK government-owned nuclear site managing the decommissioning of legacy nuclear facilities. Revenue is derived from government funding allocated for nuclear decommissioning and waste management activities at the Sellafield site in Cumbria.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Sellafield Ltd operates the UK's largest nuclear decommissioning site in Cumbria, England, managing the safe decommissioning of legacy nuclear facilities and the retrieval, treatment, and long-term management of radioactive waste. Core activities include waste retrieval from legacy ponds and silos, contaminated land remediation, demolition of redundant nuclear structures, and infrastructure modernization, supported by robotic radiation monitoring technologies such as the Spot quadruped with integrated swabbing tools.

Product overview

Sellafield Ltd operates the UK's largest nuclear site in Cumbria, managing the decommissioning and cleanup of historic nuclear facilities. The organization does not offer commercial software products. Its operational activities include nuclear decommissioning, radioactive waste management, retrievals of waste from legacy facilities, remediation of contaminated land, demolition of redundant structures, and infrastructure development. Sellafield also deploys robotic technologies, including Spot by Boston Dynamics, for hazardous environment monitoring and radiation surveys to support safer decommissioning operations and reduce human exposure to radiation.

Differentiator

Problem solved

Functional benefit

Products and services

• Nuclear Decommissioning Services Safe decommissioning of legacy nuclear facilities at the Sellafield site in Cumbria, including remediation, demolition of redundant structures, and management of contaminated land. Delivered to the UK government and partner engineering contractors.
• Radioactive Waste Management and Retrieval Retrieval, treatment, and long-term storage of radioactive waste from legacy ponds and silos on the Sellafield site, including handling of high-hazard legacy wastes.
• Robotic Radiation Monitoring (Spot with Swabbing Tool) Deployment of the Boston Dynamics Spot quadruped robot equipped with a swabbing tool to perform surface swabs and radiation surveys in hazardous nuclear areas, reducing human exposure during decommissioning operations.
• Site Infrastructure Development and Regeneration Long-term site infrastructure modernisation and regeneration at the Sellafield nuclear site, including refurbishment and replacement of utility distribution systems, delivered alongside decommissioning operations.

Quantifiable outcome

• Successfully trialed Spot robot with swabbing tool for radiation monitoring in February 2026

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Six partnerships are on record, tiered core and minor.

• AtkinsRéalis Group Inc.coreImplementation/ SI/ Consulting Partner · 31 October 2025AtkinsRéalis was appointed to a 15-year framework for nuclear decommissioning and waste management activities at the Sellafield site. The contract encompasses remediation, waste retrievals, technical services, and demolition with a total maximum value of £4.6 billion and an initial duration of nine years with an extension option.
• AmentumcoreImplementation/ SI/ Consulting Partner · 31 October 2025Amentum secured positions on a multi-billion pound framework for decommissioning work at the Sellafield nuclear site. The contract's estimated value for Amentum's share is up to £1.4 billion ($1.9 billion USD).
• HOCHTIEF (UK) ConstructioncoreImplementation/ SI/ Consulting Partner · 13 October 2025HOCHTIEF was awarded a framework contract worth up to £595 million for infrastructure development at the Sellafield nuclear site in Cumbria, part of a £2.9 billion long-term partnership. The project supports nuclear decommissioning and operations while emphasizing sustainability, safety, and community growth.
• CostaincoreImplementation/ SI/ Consulting Partner · 13 October 2025Construction engineering firm Costain was selected as a contractor by Sellafield Ltd, with a contract valued at up to $1.33 billion. The nine-year project involves refurbishing and replacing utility distribution systems to support Sellafield's decommissioning efforts, with possible extension.
• Morgan SindallminorImplementation/ SI/ Consulting Partner · 13 October 2025Morgan Sindall is involved in a project at the Sellafield nuclear site alongside Costain and Hochtief, providing construction and civil engineering services as part of the broader decommissioning effort.
• Hochtief AGminorImplementation/ SI/ Consulting Partner · 13 October 2025Hochtief AG was awarded a contract supporting nuclear operations and decommissioning at Sellafield. The contract signifies ongoing work in nuclear decommissioning activities in the UK.

Scale indicators4 records

Recent moves6 records

Expansion highlights3 records

Broad incumbents

• Bechtel: US-based engineering, procurement, and construction company with extensive nuclear and environmental remediation work for the US Department of Energy; comparable as a major incumbent in large-scale nuclear site cleanup.
• Jacobs: Global professional services and nuclear services firm supporting DOE, Sellafield, and other nuclear clean-up programs; comparable as a broad incumbent in nuclear engineering, decommissioning, and environmental remediation.
• Nuclear Decommissioning Authority (NDA): UK government body that owns Sellafield Ltd and oversees decommissioning of all UK public-sector nuclear sites; directly comparable as the parent/strategic counterparty and operator of multiple nuclear clean-up programs including Sellafield.
• Orano: French nuclear cycle company providing decommissioning, waste management, and nuclear site cleanup services; comparable as a major European operator of nuclear decommissioning and radioactive waste services.

Direct peers

• Amentum: US-based engineering and nuclear services firm appointed to the Sellafield framework (£1.4B share) and a leading provider of nuclear decommissioning services to US DOE sites; directly comparable as a Tier-1 nuclear decommissioning contractor.
• ENRESA: Spain's state-owned nuclear waste and decommissioning agency, responsible for the cleanup of Spanish nuclear plants; directly comparable as a state-owned entity managing radioactive waste management and decommissioning of legacy facilities.
• AtkinsRéalis: Canadian engineering firm that secured the £4.6B 15-year Sellafield framework and is a global nuclear services provider; directly comparable as a Tier-1 nuclear engineering services partner.
• Andra: France's national radioactive waste management agency, tasked with long-term disposal of French nuclear waste including a deep geological repository; directly comparable in mission, state ownership model, and regulatory scope.
• Babcock International: UK-headquartered engineering firm with significant nuclear decommissioning and site cleanup operations supporting the UK MOD and NDA estate; directly comparable as a UK nuclear services provider with similar mission.
• NWS (Nuclear Waste Services, UK): UK NDA subsidiary managing the country's low-level and intermediate-level radioactive waste, including a planned Geological Disposal Facility; directly comparable as a UK state-owned nuclear waste management entity.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights5 records

Customer concentration

• Xx.com/SellafieldLtd

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sellafield