---
title: "HEPA Filters"
ocid: "ocds-h6vhtk-050366"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-050366"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-050366.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-050366.json"
source: "Find A Tender Service"
current_stage: "Planning"
buyer: "SELLAFIELD LIMITED"
published: "2026-05-12"
---

# HEPA Filters

Buyer: SELLAFIELD LIMITED  
Current stage: Planning  
OCID: ocds-h6vhtk-050366

[View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-050366)  
[Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-050366.json)

## Summary

Sellafield Limited, a sub-central government public authority based in Warrington, United Kingdom, is in the planning stage of a procurement process for the supply of High Efficiency Particulate Air (HEPA) Filters. The procurement is yet to reach the tender stage and is geared towards completing market engagement activities by 22nd May 2026. The initiative, titled "HEPA Filters," falls under the industry category of air filters, with a contract value estimated at £6,500,000. This process involves a dual source contracting strategy, aiming to secure two suppliers for the HEPA Filters, with the procurement method being a selective and competitive flexible procedure. The engagement is set to conclude with an expression of interest deadline by 30th May 2026.

This procurement creates substantial opportunities for businesses specializing in air filtration systems, especially small and medium-sized enterprises (SMEs). Given the complexity of the project, which includes design, manufacture, testing, and delivery of nuclear-grade air filters, businesses capable of meeting these technical specifications stand to benefit significantly. The opportunity to become one of the dual suppliers allows companies to partake in a significant commercial relationship with the NDA Group's operating companies. These businesses must be prepared for type testing and obtaining necessary type approval registrations for HEPA Filters to be used on UK Nuclear Licensed Sites, presenting a strategic growth opportunity for SMEs aiming to establish or expand their presence in the nuclear sector.

## Notice

The Detailed Design, Manufacture, Test, Supply and Delivery of Nuclear Grade Air Filters, including High Efficiency Particulate Air (HEPA) Filters to the NDA Group

### Lot Information

Lot 1

Lotting options for lot 1 will be confirmed within tender documents

Lot 2

Lotting options for lot 2 is being reviewed and will be confirmed within tender documents

### Planning Information

Prior to the publication of the forthcoming HEPA Filters Tender, Sellafield Ltd is reviewing the initially proposed procurement strategy and the market feedback received during earlier market engagement activities. 
This review is being undertaken to ensure that the procurement approach taken is appropriate for both the supply market and The NDA Group Operating Companies.
As part of this process, Sellafield Ltd is seeking to re-engage with the market to validate and further understand supplier views on specific elements of the proposed strategy. 
In particular, feedback is invited on the following areas:
1. Contracting Strategy
Supplier views are requested on the suitability and viability of a dual source contracting model (i.e. the appointment of two suppliers) for the scope of HEPA Filters.
2. Proposed Lotting Structure
Supplier feedback is requested on the following indicative lotting structure, should a two supplier model be adopted:
Lot 1 – Smaller Basket, comprising:
• Mini Pleat HEPA Filters. Unmodified. Type I & II
• Large Circular Filters (Internal and External Seal) stainless steel case. 
• Large Circular Filters (Internal Seal) PU case.
• In line canister filters (flanged)
• Push through filters (stainless steel case)
Lot 2 – Larger Basket, comprising:
• Deep pleat HEPA Filters (with and without features)
• Mini-pleat filters modified with lifting features & attachments
• Large Circular HEPA filters (Internal and external Seal) mild steel casing.
• In line Canister HEPA Filters (screwed)
• Push through filters (mild steel and PU case)
• Specialist HEPA Filters & accessories
• Small HEPA Filters
Responses to this market engagement will help inform Sellafield Ltd’s ongoing strategy development. Participation in this exercise is voluntary and does not form part of any formal procurement process, nor does it create any commitment to proceed in line with the approaches outlined above.
Please respond via an Atamis message against Atamis record Reference C21795 which is used for market engagement only (See the following Atamis portal Link) https://atamis-2464.lightning.force.com. 
Interested suppliers are to register against project C21795, access the document in the folder titled 'Request for Information (RFI) Version 2.0' and then send your completed response via the Atamis messaging portal. 
Please also register against Atamis Project C8489 for the upcoming tender using the link provided. 
If you encounter any issues in doing this, please forward your response directly to jasmine.lane@sellafieldsites.com 
The deadline for providing your feedback is Friday 22nd May at BST 16.00

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/043551-2026 |
| Notice type | UK2 - Preliminary Market Engagement Notice |
| Procurement type | Framework |
| Procurement category | Goods |
| Procurement method | Selective |
| Procurement method details | Competitive flexible procedure |
| Tender suitability | SME |
| Awardee scale | Not specified |
| All stages | Planning |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 12 May 2026 |
| Submission deadline | Not specified |
| Future notice date | 6 May 2026 |
| Award date | Not specified |
| Contract period | 30 Sep 2026 - 30 Sep 2031 |
| Recurrence | 2026-05-27 |

## Values

| Field | Value |
| --- | --- |
| Tender value | £6,500,000 |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

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

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | SELLAFIELD LIMITED |
| Additional buyers | SELLAFIELD LTD (WEST CUMBRIA HSE) |
| Locality | WARRINGTON |
| Post town | Warrington |
| Postcode | WA3 6GR |
| Country | England |
| ITL 1 | TLD North West (England) |
| ITL 2 | TLD6 Cheshire |
| ITL 3 | TLD61 Warrington |
| Local authority | Warrington |
| Electoral ward | Birchwood |
| Westminster constituency | Warrington North |
| Delivery location | Not specified |

## CPV Codes

### Divisions

- 42 - Industrial machinery

### Codes

- 42514310 - Air filters

## Release History

- 12 May 2026 at 14:28 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/043551-2026
- 15 Apr 2026 at 12:55 - Planning - UK3 - Planned Procurement Notice - https://www.find-tender.service.gov.uk/Notice/034231-2026
- 8 May 2025 at 08:39 - Planning - UK1 - Pipeline Notice - https://www.find-tender.service.gov.uk/Notice/019569-2025
- 15 Apr 2025 at 14:23 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/015309-2025

## Documents

- https://www.find-tender.service.gov.uk/Notice/043551-2026
  12th May 2026 - Preliminary market engagement notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/034231-2026
  15th April 2026 - Planned procurement notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/019569-2025
  8th May 2025 - Pipeline notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/015309-2025
  15th April 2025 - Preliminary market engagement notice on Find a Tender

## Notice URLs

- https://atamis-2464.lightning.force.com
- https://atamis-2464.lightning.force.com/
- https://www.gov.uk/government/organisations/sellafield-ltd
- 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-050366. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-050366.json.