UK Public Sector Contracts & Tenders

The UKNNL is introducing an open framework for software solutions and hardware in support of technical and scientific computing applications. This is a Preliminary Market Engagement Notice for the procurement to gather expressions of interest and advise of an upcoming market engagement session. The Framework will be lotted into the following lots: Lot 1 – Infrastructure Support Lot 2 Software Development Lot 3 Edge Computing & IoT Lot 4 Scientific Computation Facilities Lot 5 Research activities Lot 6 Full solution build If you are interested in attending the session please register your interest and secure your place. Please visit the ticketing website in the link below to register your place: https://www.ticketsource.co.uk/national-nuclear-laboratory/t-nopxyeo The session will take place on 29th May 2025 via Microsoft Teams at 10am. Please also ensure to sign up to the CTM portal link held in this notice to express your interest and download the scope of this framework.

The United Kingdom National Nuclear Lab (UKNNL) requires the provision of and Advanced Thermal Hydraulics Modelling Tool.

The United Kingdom National Nuclear Lab (UKNNL) requires the provision of Occupational Health and Related Services. To ensure a comprehensive view on the current situation, we are issuing the attached Early Engagement RFI to receive input from the supply market. Early Engagement RFI Submission Deadline = 09/07/2025 (complete and return Early Engagement RFI OHRS). This exercise is a request for information, it does not constitute a formal procurement process. The purpose of this exercise is to assess the interest and capabilities within current markets to deliver this service. UKNNL may choose to contact suppliers based on the information provided in this questionnaire. If you prefer not to be contacted, please clearly indicate this preference in your questionnaire response. UKNNL assure you that any information provided during this exercise will not adversely affect the evaluation of any offers you may submit in response to any future Invitations to Tender. Instructions: Please populate ALL and ONLY the yellow shaded cells, as applicable. Please note some fields to be completed include a predefined drop down list. Do not add, delete, insert, move, or otherwise change any cells, rows, or columns in any of the worksheets. Please return this questionnaire to james.ngoe@uknnl.com before 17:0 PM on Friday 9th July 2025.

AB Rig: UKNNL Require a Design and Manufacture of remote operated AB Rig and associated equipment to size reduce material and allow for moving material in the X, Y & Z axis. The AB Rig consists of 4 plant items; XY Table Z Drive & Rotational Rig Powered Hacksaw Slitting Saw Assembly Additional equipment shall be present on the AB Rig either as part of the 4 plant items or as standalone ancillary items; Clamping Capability Cameras Lifting Capability Temperature Probe Milling Head Support Bracket For further information with regards to this opportunity, please contact: Izak.Cartain-Farish@uknnl.com

UKNNL are seeking expressions of interest from suppliers who are able to support with waste disposal service in West Cumbria. UKNNL are interested in hearing from suppliers who can process one or more of the following types of waste: - Office based waste - Ground waste - Chemical Waste - Grout/Cement Waste - Glass & Wood Recycling - Oil Supplier's are asked to email Emma.Kirkpatrick@uknnl to express an interest and should provide information on the services available to help inform a potential future tender exercise.

UKNNL is conducting preliminary market engagement to see if there are any suppliers who can supply a Leica DMi 5000 microscope (New or Refurbished) for the purpose of being used as spare parts for existing equipment.

Open-Source Information Provider In support of the strengthened safeguards system, the UKNNL on behalf of our customer requires broad access to geographically and linguistically diverse sources of relevant open-source information. The information is required on nuclear dual use technologies relating to industrial infrastructure and nuclear research and development, as well as information on security, economics, weapons of mass destruction and the politics surrounding such weapons. Detailed surveys are required of States' industrial and nuclear research infrastructure and issues that may induce a State to proliferate. The collection and analysis of such information, on scientific, technical, economic, political and nuclear-related developments, is now an integral component of the State evaluation process. The activity within two taskings is highly specialised, requiring regional foreign language, technical and scientific capabilities. Information in a multitude of languages is required and specialised linguists are thus required to decipher this information, with capabilities beyond translation. The propsed supplier will need to have technical understanding of nuclear terminology, technology and knowledge of related political, regulatory, and international environments. The proposed supplier will also need to have a detailed understanding of the roles and responsibilities of the IAEA and their safeguards regime. Linguists are required to provide nuanced cultural insight and native perspectives invaluable for exploring issues. In addition, the content is considered sensitive and therefore the supplier will be required to undergo rigorous vetting and security aspects before contract commencement. The proposed supplier would be required to submit monthly abstracts, reports and updates (based on open source information) that are relevant to nuclear technology development in identified regional areas.

Safeguards-related training courses. UKNNL on behalf of our customers has a long-term requirement for a wide range of safeguards-related training courses. New safeguards inspectors require training and practical experience on fuel cycle plants and the techniques and procedures to be applied during inspections. More advanced courses are required for senior inspectors, whilst specialised courses are desirable for other key personnel. To undertake this training, access to appropriate expertise and nuclear facilities, is required and in some cases made only available by Member States. Inspectors need to develop specific listening and negotiation skills to deal confidently with difficult situations arising from disagreements with local, regional and State authorities, facility personnel in planning, conducting and reporting safeguards inspections and other activities based on Safeguards Agreements. The course objectives must be developed with the purpose to help IAEA staff and inspectors fine-tune their skills, with an emphasis on providing insights and guidance applicable in all structured negotiating situations, and specific tips for dealing with inflexible interlocutors and for handling issues arising from cultural differences and difficult personality traits. Skills required in this course include direct/positive speaking, careful listening, asking 'open' questions, impartiality, confidentiality, handling emotions, self-esteem and 'face-saving' strategies, differing ethnic/cultural value systems, and dealing with 'spoilers' and 'bad leaders'. The course facilitators must have extensive experience in diplomatic negotiation, with the ability to utilise experts and former diplomats with a high-level of experience in negotiation and professional mediation. The proposed contractor must have experience in international or multilateral political environments and must be familiar with the responsibilities and activities of the IAEA and its inspectors. The specific target for the research is considered sensitive and, therefore suppliers must meet the minimum security requirements to handle, OFFICIAL SENSITIVE information.

Development of 3D Models for Nuclear Facilities. The International Atomic Energy Agency (IAEA) maintains its ability to verify the nuclear programmes of non-nuclear weapon State (NNWS), including the capability to rapidly respond to any significant changes required for the implementation of safeguards-related activities in the field. As one part of its longer-term preparedness activities to date, the Department of Safeguards has already been able to acquire and demonstrate a limited technical capability in using Virtual Reality (VR) navigation inside real-world 3D scans, including the ability to attach relevant geobased data sources to 2D optical imagery. Lessons learned from previous VR projects have already been applied in the development of the current capability. However, to be more effective in its ability to rapidly respond to potentially significant changes in the short term, there is a need for the Department of Safeguards to develop 3D models of a number of very specific critical facilities. As part of its long term preparedness activities, the Department of Safeguards needs to develop the ability to develop and use 3D and Virtual Reality (VR) models for training, analysis and knowledge management. This task will support the creation of models for a number of different nuclear facilities and sites, in close consultation with IAEA experts and inspectors. The 3D models will provide tangible benefits in terms of knowledge management and implementation of safeguards. This will include the training/familiarization of inspectors who may have limited experience of the specific processes at the selected critical nuclear facilities and implementation of safeguards therein. The activity within this task is highly specialised, requiring significant technical knowledge and capabilities with advanced state-of-the-art 3D modelling technology. The proposed contractor must have experience of developing 3D models and resources similar to the facilities of interest. In addition, models must have the capability of being integrated with relevant IAEA Safeguards IT architecture, standards, policies and procedures. The proposed contractor must demonstrable experience of working with the nuclear sector. The specific target for the research is considered sensitive and, therefore suppliers must meet the minimum security requirements to handle, OFFICIAL SENSITIVE information.

UKNNL is seeking to establish a framework agreement with a single supplier/ joint venture to undertake the role of “Strategic Design Partner” to support UKNNL with Deconversion. The framework agreement will run for 4 years. The objective of this preliminary market engagement is to provide an update on the Deconversion Programme of work being undertaken by UKNNL and to brief the market on the upcoming tender exercise. The session will include an overview of the project, an outline of the tender procedure, framework agreement arrangement and call-of contracts and timeline of activities.

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 for the Integral Molten Salt Reactor (IMSR) for a client. As part of the customer requirements, the fuel salt material must be provided to a set specification. UKNNL are seeking support to develop a proven methodology and instrument for measurement of the UF3/UF4 ratio that could then be utilised by UKNNL staff for the purposes of supporting the delivery of the fuel salt product to the client.

Request for information from companies with experience in muon technology.

The design and manufacture of a Fourier Transform Infrared (FTIR) Spectroscopy System. High level functional requirements as per below: 1. The FTIR equipment shall be capable of measuring the corrosion thickness on samples up to 10 µm. 2. The FTIR rig shall be operated remotely. 3. The FTIR equipment shall be capable of being operated in conjunction with an XY table, allowing the complete area of the sample to pass over the FTIR sampling area. 4. The probe head of the FTIR equipment must protrude from the end of the spiral wall plug to which it is fitted in order to allow the sample to be presented up to the probe with a clearance of 0.4mm +/- 0.1mm. 5. The probe head of the FTIR equipment shall be protected from damage that samples being pushed against it could cause. 6. The FTIR equipment shall include a desktop computer and software to support the analysis and display the results from the FTIR equipment. 7. The FTIR equipment shall be designed to withstand the in-cell environment. • Radiation In-cave: 30Gy/hour at 30cmo Out-of-cave: 10µGy/hour at 30cm • Temperature In-cave: 5°C to 45°Co Out-of-cave: 5°C to 35°C• All equipment shall operate in relative humidity of5% to 95% non-condensing. • All equipment shall operate at atmospheric pressure.

The requirement is to assess and propose commercial available products and processes to remedy deterioration of the physical fire protection barriers which maintain integrity of structural steel work in the event of an outbreak of fire.

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) function. This will initially be a 12-month contract to undertake – • Project readiness/deliverability reviews • Detailed scoping and feasibility assessments • Learning from experience and project reviews. • Benefits identification, measurement and realisation. The successful party will be required to have demonstrable evidence of working and understanding of delivery of projects within nuclear facilities.

UKNNL is seeking expressions of interest from suitably qualified and experienced contractors to support the assembly, installation verification, and inactive commissioning of a new modular experimental rig at the Preston facility. The rig comprises a modular, three-storey structure incorporating multiple process and utility services. The appointed contractor will be responsible for mechanical assembly, installation checks, and inactive commissioning (without uranics) to enable active commissioning (with uranics) by others. 2. Scope of Work The contractor will be expected to undertake, as a minimum: Mechanical Assembly • Offloading, positioning, and installation of prefabricated rig modules • Mechanical assembly and integration of modules to form the complete structure • Installation of access platforms, supports, and ancillary equipment • Alignment, fixing, and structural integrity checks Interface & Service Readiness • Preparation and verification of interfaces for: o Gas services o Extraction/ventilation o Fluids o Electrical supplies • Coordination with service installation contractors • Ensuring connection points are accessible, correctly labelled, and compliant with drawings/specifications Electrical, Controls and Instrumentation: • Cross module connections • Final install • Connection to Pilot Plant electrical distribution network 1. Project Overview UKNNL is seeking expressions of interest from suitably qualified and experienced contractors to support the assembly, installation verification, and inactive commissioning of a new modular experimental rig at the Preston facility. The rig comprises a modular, three-storey structure incorporating multiple process and utility services. The appointed contractor will be responsible for mechanical assembly, installation checks, and inactive commissioning (without uranics) to enable active commissioning (with uranics) by others. ________________________________________ 2. Scope of Work The contractor will be expected to undertake, as a minimum: Mechanical Assembly • Offloading, positioning, and installation of prefabricated rig modules • Mechanical assembly and integration of modules to form the complete structure • Installation of access platforms, supports, and ancillary equipment • Alignment, fixing, and structural integrity checks Interface & Service Readiness • Preparation and verification of interfaces for: o Gas services o Extraction/ventilation o Fluids o Electrical supplies • Coordination with service installation contractors • Ensuring connection points are accessible, correctly labelled, and compliant with drawings/specifications Electrical, Controls and Instrumentation: • Cross module connections • Final install • Connection to Pilot Plant electrical distribution network Installation Verification • Completion of installation checks against drawings and specifications • QA/QC inspections and documentation • Identification and resolution of defects or non-conformances • As-built documentation and redlining Inactive Commissioning • Mechanical completion checks • Pressure/leak testing (where applicable) • Functional checks (non-energised / non-process) • Safety and compliance verification • Handover documentation and commissioning packs ________________________________________ 3. Contractor Requirements Interested parties should demonstrate: • Experience assembling modular or multi-storey industrial/process rigs or plant • Experience working with multi-disciplinary service interfaces (gas, fluids, extraction, electrical) • Commissioning and mechanical completion experience • Strong health, safety, and quality management systems to comply with CDM regulations • Ability to work within an operational facility environment • Relevant certifications and competencies ________________________________________ 4. Deliverables The appointed contractor will be expected to provide: • Method statements and risk assessments • Installation and commissioning plans • Inspection and test records • Mechanical completion dossiers • As-built documentation • Handover pack ________________________________________ 5. Programme (Indicative) • Site readiness: June 2026 • Assembly period: 3 months • Handover to active commissioning: September 2026

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 the current situation, we are issuing the attached Early Engagement RFI to receive input from the supply market. Early Engagement RFI Submission Deadline = 06/03/2025 (complete and return Early Engagement RFI In Cave Vacuum System). This exercise is a request for information, it does not constitute a formal procurement process. The purpose of this exercise is to assess the interest and capabilities within current markets to deliver this service. UKNNL may choose to contact suppliers based on the information provided in this questionnaire. If you prefer not to be contacted, please clearly indicate this preference in your questionnaire response. UKNNL assure you that any information provided during this exercise will not adversely affect the evaluation of any offers you may submit in response to any future Invitations to Tender. Brief Scope: UKNNL is seeking information from suppliers on their ability to design, manufacture, test and deliver a CVCS for use in a radiologically shielded AHF. The system will be used to support housekeeping during remote metal cutting operations by collecting hazardous swarf for safe disposal. It must be suitable for operation in a high-radiation environment, be capable of remote operation and maintenance, and be compatible with existing in cave handling equipment. The supplier would be expected to own the detailed design, using UKNNL provided concept information, and deliver one complete system, including testing and supporting documentation. This RFI is issued to understand current market capability and interest ahead of any future procurement.

United Kingdom National Nuclear Laboratory is undertaking pre-market engagement to inform the development of a Fabrication and Machining framework, structured as a multi-lot arrangement to support both nuclear and non-nuclear requirements. The framework is intended to provide access to suitably qualified suppliers, capable of delivering a range of fabrication and machining services, which may include (but are not limited to): - precision machining; - coded welding; - specialist fabrication; - component manufacture; - repair and modification activities; - associated quality, inspection and documentation services.

UKNNL would like to invite suppliers to apply to join a new Open Framework to support with the supply of Nuclear Technical Services for the United Kingdom National Nuclear Laboratory.