---
title: "Maritime PRPP Contract Details notice"
ocid: "ocds-h6vhtk-0665a5"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0665a5"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-0665a5.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-0665a5.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "DEPARTMENT FOR ENERGY SECURITY & NET ZERO"
published: "2026-03-09"
---

# Maritime PRPP Contract Details notice

Buyer: DEPARTMENT FOR ENERGY SECURITY & NET ZERO  
Current stage: Award  
OCID: ocds-h6vhtk-0665a5

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## Summary

The Department for Energy Security & Net Zero, based in London, has awarded a contract titled "Maritime PRPP Contract Details notice." This falls under the industry category of technical services and is primarily concerned with providing a qualitative assessment of proliferation resistance and physical protection characteristics for advanced reactor systems in marine propulsion applications. The contracting process reached the award stage as of 9th March 2026, with the contract active from 20th February 2026 to 31st March 2026. Conducted under a direct procurement method and classified as below the threshold without competition, the contract was executed by the United Kingdom National Nuclear Laboratory Limited (UKNNL), headquartered in Warrington.

This procurement presents opportunities specifically for businesses specialising in technical services related to nuclear technology and assessments. Large-scale enterprises with expertise in reactor systems and maritime applications would find this tender particularly relevant. The contract, valued at £20,000 plus VAT, focuses on integrating previous land-based PRPP evaluations for marine applications, thereby providing a unique niche for growth in maritime propulsion systems. Enterprises keen on expanding their niche in advanced reactor systems and qualitative assessments can leverage this opportunity to establish or deepen their expertise in the burgeoning area of marine nuclear applications.

## Notice

The Department for Energy Security and Net Zero has awarded a contract for the provision of a qualitative assessment of the proliferation resistance and physical protection (PRPP) characteristics of advanced reactor systems adapted for potential marine propulsion applications (hereafter "the Study"). This assessment builds on previous PRPP evaluations commissioned by the Client for land-based Generation IV reactor systems; specifically, PWR, HTGR, LFR, SFR and MSR designs and will consider how PRPP outcomes may differ when such reactor types are adapted for deployment onboard maritime vessels. The Study will include the following: 1. Technology and Design Review * Review of the global marine reactor development landscape to identify which previously assessed land-based reactor types have credible or emerging marine-based variants. * Identification and description of design changes associated with marine deployment, including but not limited to: Core size and configuration Core materials Fuel enrichment levels Fuel form Spent fuel volumes and properties Refuelling approach and operational cycles 2. PRPP Scenario Review * Re-examination of the three threat scenarios used in the previous PRPP assessments (one proliferation scenario and two physical protection scenarios). * Qualitative commentary on how scenario assessments and scoring 'would change' because of: Siting reactors onboard maritime vessels Design modifications identified in the technology and design review 3. High-Level Assessment Output * Development of a high-level, qualitative description of how PRPP measure scores might be adjusted should an expert workshop be reconvened. * The Study will 'not' re-score the original PRPP measures in detail, as the intent is to inform future expert assessment rather than replace it.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/021033-2026 |
| Notice type | UK7 - Contract Details Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Direct |
| Procurement method details | Below threshold - without competition |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 9 Mar 2026 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 20 Feb 2026 |
| Contract period | 20 Feb 2026 - 31 Mar 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | £20,000 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | DEPARTMENT FOR ENERGY SECURITY & NET ZERO |
| Locality | LONDON |
| Post town | South West London |
| Postcode | SW1A 2HP |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | UNITED KINGDOM NATIONAL NUCLEAR LABORATORY LIMITED (UKNNL |

## CPV Codes

### Divisions

- 71 - Architectural, construction, engineering and inspection services

### Codes

- 71356000 - Technical services

## Release History

- 9 Mar 2026 at 16:20 - Award - UK7 - Contract Details Notice - https://www.find-tender.service.gov.uk/Notice/021033-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/021033-2026
  9th March 2026 - Contract details notice on Find a Tender

## Notice URLs

- 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-0665a5. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-0665a5.json.