Buyer profile
United Kingdom National Nuclear Laboratory
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Total contracts
17
Known spend
£22m
10 disclosed
Average value
£2m
Per contract
Active suppliers
10
Last 5 years
Top suppliers
Last 5 years- 1
AMENTUM CLEAN ENERGY LIMITED
£10m
- 2
AtkinsRéalis
£10m
- 3
CYCLIFE UK LTD
£10m
- 4
MOTT MACDONALD LIMITED
£10m
- 5
NSG ENVIRONMENTAL LIMITED
£10m
- 6
NUVIA LIMITED
£10m
- 7
ABBOTT RISK CONSULTING LIMITED
£10m
- 8
ASSYSTEM ENERGY & INFRASTRUCTURE LIMITED
£10m
- 9
FRAZER-NASH CONSULTANCY LIMITED
£10m
- 10
IHF LIMITED
£10m
What they buy
By CPV categoryElectrical equipmentCPV 31
1 contract0
Architectural & engineeringCPV 71
1 contract
Business servicesCPV 79
1 contract
Companies House
UNITED KINGDOM NATIONAL NUCLEAR LABORATORY LIMITED · 03857752active
Incorporated
Oct 1999
Last accounts filed
Sept 2025
Next accounts due
Jun 2027
Active officers
7
Active officers
- WHEELER, Samanthasecretary
- ANTROBUS, Juliannedirector
- CLARKE, Mandy Dawndirector
- GRAY, Hannah Brewerdirector
- SCOTT, David Douglasdirector
- SMART, Neil Graham, Professordirector
- TENNER, Brian Thomasdirector
SIC codes
Tender activity
Notices published per month — last 24 months
All contracts (17)
Strategic design partner to support deconversion - framework agreement
Please note this notice is a copy of notice reference: 2026/S 000-027524 from March 2026, which is being republished to replace an incorrect notice reference: 2026/S 000-077106. Th
Open framework for nuclear technical services
This notice is to commence the start of the standstill period for the establishment of the Open Framework for Nuclear Technical Services. UKNNL is establishing an Open Framework to
NNLC746 - nuclear advanced computing & innovation partnership (nacip)
United Kingdom National Nuclear Laboratory (UKNNL) is seeking to enhance its access to High Performance Computing (HPC) capability to support the growing computational demands of i
Open framework for nuclear technical services
Open Framework for Nuclear Technical Services.
Autotitrator
The United Kingdom National Nuclear Lab (UKNNL) requires the provision of an Autotitrator. To ensure a comprehensive view on the current situation, we are issuing the attached Earl
In cave vacuum system - centralised vacuum cleaning system (CVCS)
The United Kingdom National Nuclear Lab (UKNNL) requires the provision of an In Cave Vacuum System - Centralised Vacuum Cleaning System (CVCS). To ensure a comprehensive view on th
Occupational health and related services
UKNNL intends to put to tender a contract for Occupational Health and Related Services. The Contract is being offered under a competitive bidding process and the UKNNL’s Terms and
Uknnl site compliance training
Health and Safety Site Compliance Training Courses. Lot 1 - IOSH/NEBOSH Training – estimated 4 year spend £170,000.00 Lot 2 - First Aid/Plant Safety Training – estimated 4 year spe
Project readiness execution reviews
The aim of this procurement is to procure a nuclear subject matter expert (SME) support to support Capex readiness and benefit reviews within the Project Management Authority (PMA)
X-ray CT scanning of coupons
x-ray CT scanning of Coupons
Muon tomography
Request for information from companies with experience in muon technology.
Provision of instrument to determine UF3 and UF4 ratio in molten uranic fuel salt matrices
UKNNL is in collaboration with Westinghouse on Springfields Fuels (SFL) site in the development and substantiation of a commercial scale process for the manufacture of fuel salt fo
Framework for the provision of analytical services to support the analysis and characterisation of samples
Establishment of framework for the provision of analytical services to support the analysis and characterisation of samples. The scope of this Framework has been separated into two
Process modelling software
UKNNL has procured a process modelling and commercial software licence package from Siemens Industry Software Limited (SIS) Limited and awarded the contract to them.
Advanced thermal hydraulics modelling tool
The United Kingdom National Nuclear Lab (UKNNL) requires the provision of and Advanced Thermal Hydraulics Modelling Tool.
Scientific and technical computing framework
The UKNNL is looking to establish an open framework for software solutions and hardware in support of technical and scientific computing applications. The envisaged scope of this f
NNLC484D - operations, site work and facilities management dynamic purchasing system
United Kingdom National Nuclear Laboratory (UKNNL) intends on establishing a DPS route to market for the Operations, Site Work and Facilities Management requirement, across 8 Lots.