---
title: "Isotope Adjustment System- Thermal Cycling Absorption Process"
ocid: "ocds-h6vhtk-06c565"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06c565"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-06c565.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-06c565.json"
source: "Find A Tender Service"
current_stage: "Planning"
buyer: "UK FUSION ENERGY LTD"
published: "2026-07-07"
---

# Isotope Adjustment System- Thermal Cycling Absorption Process

Buyer: UK FUSION ENERGY LTD  
Current stage: Planning  
OCID: ocds-h6vhtk-06c565

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## Summary

The public procurement process is being initiated by UK Fusion Energy Ltd, based in Abingdon, Oxfordshire, focusing on the development of an Isotope Adjustment System—Thermal Cycling Absorption Process. This process is essential for advancing their STEP Fuel Cycle project, which aims to adjust isotopic compositions within a fuel cycle integral to their operations expected in the 2040s. The procurement is currently in the planning stage, with a market engagement notice requiring responses by 2nd September 2026. The project falls under industry categories including research, testing, scientific technical simulators, and industrial machinery, highlighting the significant research and experimental development opportunities available for interested participants in the United Kingdom.

This tender presents substantial opportunities for businesses involved in scientific research, industrial machinery manufacturing, and specialised technology development. Companies in these sectors can leverage their expertise in isotopic separation technologies and closed-loop fuel cycle processes to align with UK Fusion Energy Ltd's long-term strategic goals. Engaging with this procurement process not only offers potential growth via contributing to a cutting-edge scientific initiative but also builds a relationship with a prominent public undertaking in the UK. Interested businesses can gain insights and provide input that may shape the future procurement requirements, positioning themselves as key players in upcoming project developments.

## Notice

UKFE is looking to develop the ability of TCAP within a Fuel Cycle to adjust the isotopic composition of tritium, deuterium and separate protium of continuous mixed isotopic feed within the STEP Fuel Cycle to ensure the delivery of STEP within the 2040s. To support this goal, the fuel cycle will perform a closed loop process: it will inject fuel into the plasma, capture the unspent fuel from the exhaust, purify it, separate and re-inject it within the plasma, ensuring efficient tritium recycling. There are multiple gas separations to be performed within the fuel cycle system, for which testing is required in some areas to support the appropriate selection and design of separation technologies. For more information about this opportunity, please visit the eSourcing portal at: https://ukfe.delta-esourcing.com/tenders/UK-UK-Abingdon:-Research%2C-testing-and-scientific-technical-simulator./869ZZ4ZS25 To respond to this opportunity, please click here: https://ukfe.delta-esourcing.com/respond/869ZZ4ZS25

### Planning Information

To respond to this MEN, please complete and submit Appendix 1: Questionnaire via the facility in the Delta portal by 5pm on 02/09/2026. 
Early responses would be appreciated to help inform planning decisions.
If you experience any difficulties with the portal, please contact the portal helpdesk helpdesk@delta-esourcing.com cc operationalprocurement.step@ukifs.uk
Information obtained from responses to Appendix 1: Questionnaire will help UKFE understand current market capabilities and shape the scope, direction, and design of the future procurement activities. If you have any questions about this MEN, please contact UKFE through the Delta portal. We are keen to engage with suppliers to assist with the MEN completion if needed, to ensure quality responses enabling us to shape the future requirement and procurement.
This Notice does not constitute a formal commitment to procure. The Authority reserves the right to cancel, amend, or delay this notice, in whole or part, at any stage, without incurring any liability or obligation to any party

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/063725-2026 |
| Notice type | UK2 - Preliminary Market Engagement Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Not Specified |
| Procurement method details | Not specified |
| Tender suitability | Not specified |
| Awardee scale | Not specified |
| All stages | Planning |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 7 Jul 2026 |
| Submission deadline | Not specified |
| Future notice date | 2 Sep 2026 |
| Award date | Not specified |
| Contract period | 7 Jul 2026 - 2 Sep 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Planning |
| Lots status | Planning |
| Awards status | Not specified |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | UK FUSION ENERGY LTD |
| Locality | ABINGDON |
| Post town | Oxford |
| Postcode | OX14 3DB |
| Country | England |
| ITL 1 | TLJ South East (England) |
| ITL 2 | TLJ1 Berkshire, Buckinghamshire and Oxfordshire |
| ITL 3 | TLJ14 Oxfordshire CC |
| Local authority | South Oxfordshire |
| Electoral ward | Sandford & the Wittenhams |
| Westminster constituency | Didcot and Wantage |
| Delivery location | Not specified |

## CPV Codes

### Divisions

- 38 - Laboratory, optical and precision equipments (excl. glasses)
- 42 - Industrial machinery
- 73 - Research and development services and related consultancy services

### Codes

- 38970000 - Research, testing and scientific technical simulator
- 42000000 - Industrial machinery
- 42990000 - Miscellaneous special-purpose machinery
- 73100000 - Research and experimental development services

## Release History

- 7 Jul 2026 at 13:56 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/063725-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/063725-2026
  7th July 2026 - Preliminary market engagement notice on Find a Tender

## Notice URLs

- https://ukfe.delta-esourcing.com/respond/869ZZ4ZS25
- https://ukfe.delta-esourcing.com/tenders/UK-UK-Abingdon:-Research%2C-testing-and-scientific-technical-simulator./869ZZ4ZS25
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06c565. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-06c565.json.