Source: https://tendernation.io/opportunities/01a13c5d-fa00-722f-9aad-5d216b2c5228/nnlc204-blockchain-for-data-integrity closed GB open procedure Suitable for SMEs # NNLC204 - Blockchain for Data Integrity [CTM Portal for the NDA Shared Services Alliance](https://tendernation.io/buyers/ctm-portal-for-the-nda-shared-services-alliance) Often single bidder Estimated value £1 to £2 Published 13 Nov 2020 Deadline Closed 27 Nov 2020 ## Who can bid - Buyer says suitable for SMEs The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid. - Buyer says suitable for VCSEs The buyer ticked “suitable for voluntary, community and social enterprises” on the notice. - Small contract value Valued under £135,018 including VAT, the lowest Procurement Act threshold for goods and services. - Open procedure Anyone can submit a full tender; there is no shortlisting stage. [More contracts for small businesses and VCSEs](https://tendernation.io/opportunities/for-small-businesses) ## About this tender To development of a Proof of Concept system demonstrating the application of blockchain to data integrity. NNL's vision for such a solution is a system whereby an immutable datastore, built upon DLT, can be transmitted with modelling data and contain a secure history of how the data within the companion model has been built on and developed over time. This would include information about the fundamental nuclear data that has been used within the model, and the relevant assumptions and limitations that are inherently built into this. Then, each layer of a model would add information about the assumptions and limitations that have been added at each stage of a model's life, to enable end users of models to take a deep dive into the technical underpinning of a model, and critically evaluate its validity. Achieving widespread adoption across the nuclear industry would mean such a system needs to be able to work without interconnected networks and must place security at its heart to appropriately protect the IP and knowledge of the different layers within a model, whilst still providing confidence that there have been no untoward changes or alterations that invalidate the model. ## CPV classification Custom software development services Source Contracts Finder (UK) [View official notice](https://www.contractsfinder.service.gov.uk/notice/bd1443ee-0586-41a6-85e9-3f03ae96766d) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free](https://tendernation.io/register) [Buyer profile CTM Portal for the NDA Shared Services Alliance: past awards and live tenders](https://tendernation.io/buyers/ctm-portal-for-the-nda-shared-services-alliance) [Sector More IT services tenders](https://tendernation.io/sectors/it-services) ## More tenders like this [SONI090 – Client-Side Advisor · SONI Ltd · 32 days left · 20 Nov 2026](https://tendernation.io/opportunities/01a154e4-4736-72ba-9b73-0e325c4a96e5/soni090-client-side-advisor) [Software implementation services – DNS - Metada Platform - licence a související implementační, konzultační, analytické a školicí služby · DIAMO, státní podnik · 36 days left · 23 Nov 2026](https://tendernation.io/opportunities/01a15183-8989-719a-85fd-f036dc09b9df/czechia-software-implementation-services-dns-metada-platform-licence-a-s) [IT services: consulting, software development, Internet and support – Integrale ICT-dienstverlening · Stichting TWijs · 42 days left · 30 Nov 2026](https://tendernation.io/opportunities/01a15183-8078-70d7-8df3-40f25f4d83c5/netherlands-it-services-consulting-software-development-internet-and-suppor) [Software supply services – CRE\_2026\_092 Renouvellement des licences Varonis · CREOS Luxembourg S.A. · 27 days left · 15 Nov 2026](https://tendernation.io/opportunities/01a15183-411c-7086-9da9-540c2fa32c64/luxembourg-software-supply-services-cre-2026-092-renouvellement-des-licences) [Software supply services – Vergabe zur Ablösung der bestehenden SAP-Lösung im Bereich Personal · Westfälische Verkehrsgesellschaft mbH · 29 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a15183-0636-71ff-ab09-9dda4a94f77c/germany-software-supply-services-vergabe-zur-ablosung-der-bestehenden-sap-lo) [Computer facilities management services – IT-tjänster · Kalmar Läns Museum · 29 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a15183-8774-723e-83a8-af2cae60c2ed/sweden-computer-facilities-management-services-it-tjanster)