UK Public Sector Contracts & Tenders

NNL requires a single stage of the 1 and 2 cm size contactors, to allow for the scale-up comparisons of contactor behaviour between the 1cm contactor from the Institute for Nuclear and New Energy Technology (INET), Tsinghua University, Beijing (INET design) and 4cm contactor from the University of Leeds (RR design).

Multi-Lot framework agreement to provide a compliant route to market for Fabrication and Machining Services for Nuclear and Non-Nuclear facilities.

Task 1 - Image Enhancement of Port Profiler Videos Development of a software function to enhance the image quality of existing inspection videos. The university will apply their existing image enhancement techniques (which were developed for a different application) to existing videos. They will then evaluate the results and further develop the implementation of the algorithms to make then suitable for use on the inspection videos. Task 2 - Image Processing for Corrosion Detection in SPRS Development of image processing techniques to automatically detect and quantify corrosion in inspection videos of SPRS.

Non-active electrochemistry data for AGR cladding has been generated and modelling evaluation was carried out by NPL, using the newly measured data to guide inputs, to predict susceptibility of the fuel cladding to SCC in caustic conditions. Following these initial experiments, additional non-active testing has been carried out and subsequent further modelling tasks and development have been recommended. NPL will carry out the following Tasks: • Investigation of the sensitivity of the modelling results (tip acidification and tip chloride accumulation) to the transfer coefficient related to the cathodic reaction. • Investigation of the sensitivity of the modelling results (tip acidification and tip chloride accumulation) to the passive current density. • Modify previous COMSOL simulation model of crack electrochemistry for advanced gas-cooled reactor stainless steel cladding in pond storage to include the presence of boric acid. • Modify the model to account for the dependency of the crack-tip current density on the local electrode potential. • Assess numerical convergence issues related to the very sharp change in electrode kinetics between the crack walls and crack-tip and endeavour to resolve. • NPL report containing the modifications to the previous model and example of results. • Modify COMSOL model

Translation services, direct award via Lot 1 of the CCS Language Services RM6141

National Nuclear Laboratory award the contract for Software support via ccs G cloud to ensure continuity of service support to key software components.

There is a demand from Sellafield Limited to improve inspection of Special Nuclear Material (SNM) packages and store infrastructure to ensure continued safe and secure storage. SL have issued two requests for quotation (RFQ) to produce feasibility studies to examine / inspect SNM packages in two arrangements, ex-situ, and in-situ. For each arrangement an optioneering exercise would be performed to identify potential inspection system solutions and a down-selection to a preferred technology option. The scope of work for this contract will only cover the arrangements for ex-situ, details of this are as follows: • Investigate options to use existing concepts of the Automated Stores Project via existing Kuka tooling, concepts for inspections buggy and temporary stores to implement a package inspection capability.

Service contract for XPert 3 powder diffractometer

Optioneering to support the 'B13 Fire Detection System Upgrade' project. Support is required in order to provide a gap analysis and create a schedule of works for NNL to use against five key deliverables on the project, which are: • Key Deliverable 1 - Activity in duct fire detection • Key Deliverable 2 - Fire detection in B13 active areas • Key Deliverable 3 - Visual aid fire detection on the cave roof area of B13 • Key Deliverable 4 - Complex fire detection upgrade / replacement within B13 and NNL leased areas of B2 and B12.3 • Key Deliverable 5 - Removal of B14 fire detection system from NNL's fire detection system.

Appointment of a Multi Discipline Design Consultant (MDDC) to support on Advanced Modular Reactor (AMR) work. Awarded by Further Competition via Lot 1 of the CCS Construction Professional Services Framework RM6165.

The objective of this work package is to assess of the homogeneity of the U/Ce oxalate product • Using an overflow type reactor and compare to reverse strike • Consider the effect of temperature on the particle size • Consider the homogeneity • Compile a report on making and analysing U/Ce oxide materials from oxalate coprecipitation Should you wish to contact NNL, please email nnl.procurement@uknnl.com quoting the procurement reference (PSS_2024_035) in the subject as well as marking for the attention of Stacey O'Driscoll

National Nuclear Laboratory has award a contract to the University of Manchester for Pelleting work for ESA. The objective of this work package is to make and test U/Ce oxide ceramic pellets. The tasks will include: Manufacture of U/Ce oxide pellets, to a defined specification, including pressing and sintering Reporting of key characteristics including: grain size, pellet cracking (if any) etc Refinement of conditions, if optimisation is required Route to reproducibility Research into how validation of key pellet parameters can be carried out

Contract for the support of the Technology Development "Digitisation of Nuclear Power Plant I&C systems via wireless technologies" which is part of the Advanced Modular Reactor (AMR) Research, Design and Development (R,D&D) project for a High Temperature Gas-cooled Reactor (HTGR) currently known as the UK-Japan High Temperature Reactor (UKJ-HTR). This contract will deliver the following objective of TD 07: Analyse the resilience of wireless sensors and their control system to jamming-based attacks using a process-control testbed with industrial-grade WirelessHART sensors.

Rawwater Applied Technology Limited (Rawwater) has been developing a unique sealing offering called Molten Metal Manipulation (M3), which provides in-service leak sealing for industrial settings. Sealing solutions can be through bespoke solution development or through one of our developing proprietary technologies M3Spray or M3CollarCast. Following successful trials focussing on sealing point defects in stainless steel, Sellafield Ltd (SL) wish to explore sealing long, thin defects in concrete, such as those which could occur in a construction joint between concrete pours. Following submission, this is a costed proposal to implement the testing programme as described in Section 5 of report RT-1000-1279 (Proposal - Appendix B) Concrete Crack Repair: Proof of Concept Test Plan (Issue 2). The objectives of this project are to: • Build a test rig for small scale concrete M3Spray testing. • Build five concrete testing specimens. • Follow and document the results of the testing strategy and programme. • Determine the best spraying parameters to create a seal on each of the leaking specimens. • Determine whether the temperature profile for the Hydraulic sealing method is site suitable.

National Nuclear Laboratory ("NNL") has awarded a contract to Jacobs Clean Energy Limited who will further develop the concept for a Sub-Millimetre Laser Profiling System with Embedded Positional Correction as part of the Gamechangers Innovation Programme.

The Magnox Swarf Storage Silos (MSSS) were designed to store Magnox swarf residues underwater in a series of silo compartments. The liquor in MSSS is not routinely purged. Instead, additions have been made historically to offset losses due to evaporation and occasional liquor transfers, so that the liquor level is maintained. In 2019, there was an increase in the requirement for water top up in the OB. This was associated with a leak to ground. The extent of the leak has stabilised but frequent addition of water is required to compensate for the loss of volume to the ground. As the leak is continuing, testing is required to establish options to decrease or eliminate the extent of the leak. The main elements of the suggested tasks associated to this contract are: • Desk top study • Small scale tests • Review remaining concerns • Decision on short list of materials at joint meeting. • Address large-scale dosing. • Develop deployment scheme. • Assess TRL and report. • Produce confidence and risk statement

Direct award via Lot 1 of the NNL Fabrication and Machining Framework (NNLC259F) Partial Liner manufacture and testing to support BEP Fibre Optic Sensor interim & Full Scale Confirmation Trials.

National Nuclear Laboratory ("NNL") has awarded a contract to Alpha Rift Limited who will further develop the concept for an Alpha-Gamma Coincidence air monitor as part of the Gamechangers Innovation Programme. For further informatin on the Gamechangers Innovation Programme please go to https://www.gamechangers.technology/

National Nuclear Laboratory ("NNL") has awarded a contract to Cerberus Nuclear Limited who will further develop a bespoke combination of software and hardware capable of scanning and identifying changes in the surface, texture and shape of stainless-steel drums as part of the Gamechangers Innovation Programme. For more information on the Gamechangers Innovation programme please visit https://www.gamechangers.technology/