Clay Technology

What Clay Technology does

Clay Technology AB is a Lund, Sweden-based specialist consulting firm founded in 1988 that provides laboratory testing and numerical modeling services to government nuclear waste management organizations. The firm's core offering is centered on Thermo-Hydro-Mechanical (THM) characterization and modeling of bentonite clay and rock mechanics for geological disposal of spent nuclear fuel. Its service stack combines physical laboratory capabilities - testing swelling pressure, hydraulic conductivity, rheology, cation exchange capacity, mineralogical composition via Rietveld refinement of XRD diffractograms, and erosion behavior of clays and soils - with finite element and distinct element numerical simulations using COMSOL Multiphysics, CODE_BRIGHT, and 3DEC, supplemented by in-house material models. The firm also conducts atomistic molecular dynamics work in collaboration with Lund University.

The company's commercial model is professional services: project-based consulting engagements with national nuclear waste programs. Clay Technology has been the main consultant to SKB (Swedish Nuclear Fuel and Waste Management Co) for clay-based engineering barriers and backfills since 1988 and serves analogous organizations in Finland (POSIVA), Canada (NWMO), the United Kingdom (NWS/RWM), and Switzerland (Nagra), as well as VTT (Technical Research Centre of Finland). It is a subsidiary of Mitta Group, a Finnish diversified group, through which it extends geotechnical laboratory services to the construction industry. Go-to-market is direct enterprise field sales with long-term contractual relationships and collaborative research projects, including participation in the EU Horizon 2020 BEACON project on bentonite mechanical evolution.

The firm operates with a small, highly credentialed team of roughly 10 specialists holding Ph.D.s in geophysics, quantum chemistry, computational geomechanics, mechanical engineering, and civil engineering, supported by senior consultants in bentonite buffer and backfill THM behavior. Its competitive advantage rests on 37 years of accumulated laboratory data, validated material models, and accepted contributions to regulator-facing safety assessments such as SKB's SR-Site project, making it a deeply embedded participant in the European and Canadian nuclear waste repository programs rather than a broad-market engineering consultancy.

Name

Clay Technology

Legal name

Clay Technology AB

Website

https://claytech.se

Company type

Private

Founded year

1988

Operating status

Operating

Headcount range

1–10 employees

Short description

Clay Technology AB is a Lund, Sweden-based specialist consultancy founded in 1988 providing Thermo-Hydro-Mechanical laboratory testing and numerical modeling of bentonite clay and rock for government nuclear waste management programs in Sweden, Finland, Canada, the UK, and Switzerland.

Ownership category

akta.pro rank

Product category

Nuclear Waste Management Consulting

NAICS

Testing Laboratories and Services (54138)

SIC

Services-Testing Laboratories (8734), Services-Commercial Physical & Biological Research (8731)

akta.pro primary industry

Performance assessment, safety case & long-term monitoring (modeling, PA/SR, instrumentation) (EUAKAGAJ)

akta.pro secondary industries

Nuclear Materials Testing, Assay & Characterization Services (NDA/NDE, radiochemistry, materials analysis) (EUAKAIAL), Bentonite & Other Smectite Clays (IMAEAFAE)

Keywords

• Nuclear waste consulting
• Geotechnical laboratory services
• Bentonite clay testing
• Rock mechanics modelling
• THM modelling services

Headquarters

HQ city

Lund

HQ country

Sweden

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Operations, Infrastructure

Revenue model

1. Consulting Services: Professional consulting services providing laboratory testing and numerical modelling expertise to nuclear waste management organizations. Revenue is generated through project-based consulting engagements, laboratory testing services, and technical assessments for repository design and safety analysis.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Clay Technology is a specialized consulting firm providing laboratory testing and numerical modelling services for clay-based engineering barriers and rock mechanics in geological repositories for nuclear waste disposal. The firm delivers Thermo-Hydro-Mechanical (THM) modelling of bentonite clay, rock mechanics simulations, and physical/chemical/mineralogical laboratory testing of clays and soils to government nuclear waste management organizations in Sweden, Finland, Canada, and the United Kingdom.

Product overview

Clay Technology provides specialized consultancy services for soil and rock engineering, with primary focus on clay-based barriers for nuclear waste disposal. The company operates as a unified offering combining laboratory testing services (analyzing physical, chemical, mineralogical, and mechanical properties of clays and soils) with numerical modelling capabilities (THM modelling of bentonite and rock mechanics). Their core services include Geotechnical Laboratory Services, THM Modelling of Bentonite and Swelling Clays, Rock Mechanics Modelling, Mineralogy and Physico-Chemical Properties Services, Geotechnical and Hydro-Mechanical Characterization, and Technical Development and Measurements. These services are delivered to nuclear waste management organizations globally including SKB (Sweden), POSIVA (Finland), NWMO (Canada), and NWS (UK).

Differentiator

Problem solved

Functional benefit

Products and services

• Geotechnical Laboratory Services Laboratory testing services for clay and soil analysis covering physical, chemical, mineralogical, thermal, hydraulic, and mechanical property testing. Capabilities include advanced triaxial tests, oedometer tests, swelling pressure measurements, and hydraulic conductivity determination, supporting bentonite clay research for nuclear waste repositories and broader construction-industry geotechnical needs.
• THM Modelling of Bentonite and Swelling Clays Thermo-Hydro-Mechanical modelling services for bentonite and swelling clays using commercial FEM software (COMSOL Multiphysics, CODE_BRIGHT) combined with in-house developed material models. Focuses on simulating bentonite behavior in nuclear waste repositories for buffer and backfill design and performance assessment.
• Rock Mechanics Modelling Numerical simulations for assessing thermal, mechanical, thermo-mechanical, and hydro-mechanical behavior of rock masses within and around nuclear waste repositories, spanning all phases of repository evolution including construction/operation, heated period after deposition, closure, and future glacial cycles. Uses analytical solutions, the distinct element code 3DEC, and the finite element program Code_Bright. Includes earthquake rupture simulations and co-seismic fault shear displacement analysis.
• Mineralogy and Physico-Chemical Properties Services Laboratory testing and theory development for bentonite quality assessment, groundwater chemistry impact, and long-term stability analysis. Includes cation exchange capacity measurement, mineralogical composition analysis (Rietveld refinement of XRD diffractograms), and swelling pressure testing to support buffer and backfill performance assessment in nuclear waste repositories.
• Geotechnical and Hydro-Mechanical Characterization Characterization services for soil types covering geotechnical properties (water content, liquid limit, grain size) and hydro-mechanical properties (swelling pressure, hydraulic conductivity, strength testing) for nuclear waste repository design and construction-industry applications.
• Technical Development and Measurements Scale-test laboratory services for bentonite clay research including design and construction of test equipment, preparation of bentonite components, measurement technology, data acquisition, and field test instrumentation. Supports nuclear repository design validation through custom experimental setups and transducer function evaluation.

Quantifiable outcome

• Over 35 years of continuous service as main consultant to SKB since 1988
• +1 more outcomes

Named customers4 records

Segments2 records

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• Mitta GroupcoreStrategic or Co-development PartnerMitta Group is the parent company of Clay Technology. As part of Mitta Group, Clay Technology provides geotechnical laboratory services to the construction industry and benefits from the group's broader infrastructure and resources.
• SKB (Swedish Nuclear Fuel and Waste Management Co)coreStrategic or Co-development PartnerClay Technology has been the main consultant to SKB since 1988 regarding the design and behaviour of clay-based engineering barriers and backfills in geological repositories. The company carries out extensive modelling and laboratory work for SKB's Swedish nuclear waste repository program.
• POSIVA (Finland)coreStrategic or Co-development PartnerFinland's nuclear waste management organization responsible for final disposal of spent nuclear fuel. Clay Technology provides modelling and consulting services similar to those delivered to SKB.
• NWMO (Nuclear Waste Management Organization, Canada)coreStrategic or Co-development PartnerCanada's organization responsible for designing and implementing safe, long-term management of used nuclear fuel. Clay Technology provides consulting services for their repository program.
• NWS/RWM (Radioactive Waste Management, UK)coreStrategic or Co-development PartnerUK organization working to deliver a geological disposal facility for radioactive waste. Clay Technology provides consulting and modelling services for their program.
• Nagra (National Cooperative for the Disposal of Radioactive Waste, Switzerland)coreStrategic or Co-development PartnerSwitzerland's national cooperative for radioactive waste disposal. Nagra is the Swiss equivalent to SKB.
• VTT (Technical Research Centre of Finland)minorStrategic or Co-development PartnerTechnical Research Centre of Finland collaborating on nuclear waste management research and development.
• Lund University (Dept. of Theoretical Chemistry)minorStrategic or Co-development PartnerCollaborative research partnership funded by Vinnova for studying montmorillonite using synchrotron radiation at various degrees of expansion. Also involves molecular dynamics expertise.
• BEACON Project (Horizon 2020)coreStrategic or Co-development PartnerEU Horizon 2020 funded Bentonite Mechanical Evolution project aimed at improving modelling capabilities of bentonite, particularly mechanical evolution. Clay Technology participates using COMSOL Multiphysics and implementing new material models.

Scale indicators2 records

Recent moves2 records

Expansion highlights5 records

Broad incumbents

• Arup: Global engineering consultancy with a nuclear and radioactive waste management practice covering repository design and safety assessment; broader portfolio but overlapping capability set with Clay Technology.
• WSP: Global engineering consultancy (including former Golder Associates) with significant nuclear and geoenvironmental consulting practices serving radioactive waste programmes worldwide.

Direct peers

• Galson Sciences: UK-based consultancy providing safety assessment and radiological protection services for radioactive waste disposal, with deep overlap to Clay Technology's nuclear repository safety case work.
• Amphos 21: Spain/Europe-based consultancy providing reactive transport modelling, THM analyses and safety assessment support for deep geological repositories, directly comparable to Clay Technology's bentonite and barrier modelling work.
• Quintessa: UK/European consultancy specialising in mathematical modelling and safety assessment for radioactive waste disposal and environmental systems, directly comparable to Clay Technology's THM and safety case services.
• INTERA: US/Canada-based geosciences and environmental consulting firm with a dedicated nuclear waste and repository practice serving programs such as NWMO, comparable to Clay Technology's nuclear consulting services.
• Geosigma: Swedish geoscience and rock mechanics consultancy supplying hydrogeological, geochemical and rock mechanics services to SKB and other nuclear waste programmes, directly overlapping Clay Technology's repository modelling work.
• Kemakta Konsult: Swedish consultancy working on radiochemistry, safety assessments and hydrogeology for nuclear waste repositories; a close Nordic peer for SKB-related consulting.

Market position

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/clay-technology

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 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 Clay Technology