---
title: "Maentwrog Hydro Power Station Optimisation Services"
ocid: "ocds-h6vhtk-056518"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-056518"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-056518.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-056518.json"
source: "Find A Tender Service"
current_stage: "Tender"
buyer: "NUCLEAR DECOMMISSIONING AUTHORITY"
published: "2026-01-13"
---

# Maentwrog Hydro Power Station Optimisation Services

Buyer: NUCLEAR DECOMMISSIONING AUTHORITY  
Current stage: Tender  
OCID: ocds-h6vhtk-056518

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## Summary

The Nuclear Decommissioning Authority (NDA) is seeking tenders for the optimisation of the Maentwrog Hydro Power Station, a 28MW hydroelectric facility located in Cumbria, UK. The procurement process is in the tender stage, with an anticipated contract start date of 25 May 2026 and an initial term of two years, extendable by two additional one-year periods. This opportunity, under the competitive flexible procedure, aims to appoint an economic operator to deliver energy generation and trading optimisation services. The estimated contract value ranges from £240,000 to £500,000 for the initial term, increasing to a potential total of £800,000 over four years based on performance. Interested parties must submit their tender by 17 February 2026 via the Atamis Supplier Portal.

This tender provides a significant opportunity for businesses specialising in energy and related services, particularly those with expertise in energy trading and optimisation. Companies possessing a robust understanding of the wholesale energy market, technical analysis, and the ability to maximise energy generation revenue stand to benefit. SMEs are encouraged to participate, as this procurement could drive business growth through heightened visibility and potential collaboration with the central government. Successful bidders will aid the NDA in increasing income generation, supporting its mission of safely decommissioning the UK’s earliest nuclear sites, and reinforcing the UK’s position as a leader in the civil nuclear sector.

## Notice

NDA is a non-departmental public body charged, on behalf of government, with the mission to clean-up the UK's earliest nuclear sites safely, securely and cost effectively. We're committed to overcoming the challenges of nuclear clean-up and decommissioning, leaving the 17 nuclear sites ready for their next use. We do this work with care for our people, communities and the environment, with safety, as always, our number one priority. We also play an important role in supporting government's aspiration for the UK to be a global leader in the civil nuclear sector. We strive to deliver best value for the UK taxpayer by focusing on reducing the highest hazards and risks, while ensuring safe, secure, and environmentally responsible operations at our sites. We seek ways to reduce the level of public funding from government by generating revenue through our commercial activities. Maentwrog Hydroelectric Power Station ("Maentwrog") is a 28MW hydroelectric plant owned by NDA and operated by Magnox Limited ("Magnox"). The NDA is seeking to engage with economic operators obtain feedback regarding a forthcoming tender to appoint an economic operator to deliver energy generation and trading optimisation services for the NDA's Maentwrog Hydropower station asset. The core service to be delivered includes, but is not limited to the provision of trading available energy generation capacity within the wholesale market, based upon fundamental and technical analysis, market expertise and available generation capacity based upon water volumes, rainfall and available measurements within defined operational parameters. The aim of this procurement is to increase income generation to support the NDA in delivering it's mission. It is anticipated that the agreement may be based upon a 2 year initial term with 2 twelve month optional extensions. It is anticipated that the total contract value will be circa PS240,000 and PS500,000 for the initial term, with a potential income value between PS480,000 and PS800,000 across a potential total 4-year term, subject to Supplier performance. Please note, we appreciate that income will change based upon market conditions and fluctuations, therefore these are indicative estimates.

### Lot Information

Lot 1

Options: The contract term will be valid from contract commencement for an initial two (2) year period, following which there are with two (2) 12-month optional extensions, which may be invoked by agreement between the parties, a minimum of 9 months prior to the end date.

Renewal: 2 x12 month extensions

### Planning Information

As part of the engagement process, NDA will seek feedback relating to the scope of services, commercial model and anticipated key terms and conditions of contract for the purpose of market feedback. Sharing of information and feedback will be facilitated via the Atamis procurement portal, however NDA reserve the right to change the format of communication with parties who register interest to Teleconference where relevant and appropriate to expedite the process. Interested parties should register their interest to this UK02: Preliminary Market Engagement Notice via the OneNda Atamis portal. This can be found at the following address: https://one-nda.force.com/s/Welcome Initial registration of your company is achieved by using the above website link and then clicking on "Register Here". It is envisaged that the information will be made available to interested parties on 28th July 2025 along with a questionnaire to capture feedback which should be submitted to the NDA via Atamis by 12 noon on 14th August 2025, however these dates be subject to change.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/002854-2026 |
| Notice type | UK4 - Tender Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Open |
| Procurement method details | Competitive flexible procedure |
| Tender suitability | SME |
| Awardee scale | Not specified |
| All stages | Planning, Tender |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 13 Jan 2026 |
| Submission deadline | 17 Feb 2026 |
| Future notice date | 6 Oct 2025 |
| Award date | Not specified |
| Contract period | 24 May 2026 - 24 May 2028 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £1,092,000 |
| Lots value | £1,092,000 |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

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

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NUCLEAR DECOMMISSIONING AUTHORITY |
| Locality | CUMBRIA |
| Post town | Carlisle |
| Postcode | CA24 3HU |
| Country | England |
| ITL 1 | TLD North West (England) |
| ITL 2 | TLD1 Cumbria |
| ITL 3 | TLD13 Cumberland |
| Local authority | Cumberland |
| Electoral ward | Egremont North and St Bees |
| Westminster constituency | Whitehaven and Workington |
| Delivery location | TLL Wales |

## CPV Codes

### Divisions

- 09 - Petroleum products, fuel, electricity and other sources of energy
- 31 - Electrical machinery, apparatus, equipment and consumables; lighting
- 38 - Laboratory, optical and precision equipments (excl. glasses)
- 51 - Installation services (except software)
- 65 - Public utilities
- 71 - Architectural, construction, engineering and inspection services
- 72 - IT services: consulting, software development, Internet and support
- 79 - Business services: law, marketing, consulting, recruitment, printing and security

### Codes

- 09300000 - Electricity, heating, solar and nuclear energy
- 09310000 - Electricity
- 31682000 - Electricity supplies
- 38551000 - Energy meters
- 51112200 - Installation services of electricity control equipment
- 65300000 - Electricity distribution and related services
- 65400000 - Other sources of energy supplies and distribution
- 65410000 - Operation of a power plant
- 71241000 - Feasibility study, advisory service, analysis
- 71314000 - Energy and related services
- 71314200 - Energy-management services
- 71314300 - Energy-efficiency consultancy services
- 72227000 - Software integration consultancy services
- 72228000 - Hardware integration consultancy services
- 79930000 - Specialty design services

## Release History

- 13 Jan 2026 at 16:51 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/002854-2026
- 30 Jul 2025 at 08:33 - PlanningUpdate - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/044083-2025
- 30 Jul 2025 at 07:36 - PlanningUpdate - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/044064-2025
- 24 Jul 2025 at 12:47 - PlanningUpdate - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/042773-2025
- 24 Jul 2025 at 08:55 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/042600-2025

## Documents

- https://www.find-tender.service.gov.uk/Notice/002854-2026
  13th January 2026 - Tender notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/044083-2025
  30th July 2025 - Preliminary market engagement notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/044064-2025
  30th July 2025 - Preliminary market engagement notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/042773-2025
  24th July 2025 - Preliminary market engagement notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/042600-2025
  24th July 2025 - Preliminary market engagement notice on Find a Tender

## Notice URLs

- https://atamis-2464.my.site.com/ProSpend__CustomCommunitiesLogin
- https://one-nda.force.com/s/Welcome
- https://www.gov.uk/government/organisations/nuclear-decommissioning-authority
- 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-056518. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-056518.json.