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715724483_V2 The Provision of Nuclear Site Safety Justification (NSSJ) Services at HMNB Devonport

Submarine Delivery Agency

This public procurement record has 4 releases in its history.

Award

21 Aug 2026 at 12:07

UK6 - Contract Award Notice
TenderUpdate

15 Apr 2026 at 09:35

UK4 - Tender Notice
Tender

13 Apr 2026 at 11:12

UK4 - Tender Notice
Planning

10 Feb 2026 at 13:19

UK1 - Pipeline Notice
Summary of the contracting process

The Submarine Delivery Agency procured integrated nuclear site safety justification services for HM Naval Base Devonport in Plymouth. The work supports the continued authorisation and safe operation of the naval base through project management, nuclear safety advice, safety case production and maintenance, and Periodic Review of Safety activities. It includes managing and reviewing nuclear safety cases and authorised documentation, supporting the Nuclear Authorised Documentation Review Programme, providing technical support for periodic safety reviews, and independent Intelligent Customer assurance during document production and approval. The provider must also support continuous improvement, knowledge transfer, mentoring and stronger internal safety capability. The requirement covers safety consultancy, technical support, project management consultancy and nuclear safety services, within a defence and security setting.

The procurement is complete and was awarded to Nesc Limited on 20 August 2026 following an open competitive flexible procedure. One lot was evaluated on 70% technical quality and 30% non-technical criteria. Economic and technical participation conditions required completion of a Procurement Specific Questionnaire. Seven final-stage bids were received, including four from SMEs. The awarded value is £3,963,027.01 excluding VAT, or £4,755,632.40 including VAT. The contract period runs from 1 November 2026 to 31 October 2029, with options for a fourth and fifth year, giving a maximum end date of 31 October 2032. Electronic submission was allowed in English, and the lot was identified as suitable for SMEs.

This procurement demonstrates demand from the Submarine Delivery Agency for specialist nuclear safety and project management capability at a major naval base. Suppliers well placed for a future requirement would need substantial experience in nuclear safety case management, production, review and lifecycle maintenance, alongside expertise in periodic reviews of safety and independent assurance. Credibility would also depend on understanding Ministry of Defence working environments, naval nuclear safety principles, regulator expectations and the operational pressures of a military programme. The requirement favours organisations able to provide experienced safety engineers, manage reactive documentation tasks to demanding timescales, work within established design authority arrangements, and apply relevant civil nuclear practice. Strong knowledge-transfer, mentoring and continuous-improvement capability would strengthen a supplier’s position.

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Notice Information

Notice Title

715724483_V2 The Provision of Nuclear Site Safety Justification (NSSJ) Services at HMNB Devonport

Notice Description

Description of the Procurement The fundamental aim of the Naval Site Safety Justification (NSSJ) contract is to procure the provision of an integrated Project Management Service (PMS) to support the continued authorisation and safe operation of HM Naval Base (HMNB) Devonport. The contract provides specialist capability to deliver project management, nuclear safety advice, safety case production and maintenance, and Periodic Review of Safety (PRS) activities, under a pro rata model. These services ensure that the Naval Base Commander's Site Safety Justification documentation remains current, robust, and fully compliant with: * MoD Authorisation Conditions * MoD Naval Nuclear Safety Principles (NNSP) * Applicable Defence Nuclear Safety Regulator (DNSR) standards In addition to technical delivery, the contract supports knowledge transfer and information sharing to strengthen the Authority's Intelligent Customer (IC) capability. Scope of Services The services to be provided under this contract include, but are not limited to: 1. Nuclear Safety Case Management and Support * Provision of specialist nuclear safety advice reflecting modern civil nuclear practice. * Management, review, and maintenance of the full suite of HMNB Devonport nuclear safety cases and supporting documentation. * Support to the Naval Base Design Authority in ensuring safety justification documentation remains authorised and compliant throughout its lifecycle. 2. Nuclear Authorised Documentation Review Programme (NADRP) Support * Support for documentation production, review, update, and tracking activities using the Nuclear Authorised Documentation Review Programme (NADRP). * Delivery of tasks assigned via NADRP in accordance with programme priorities and Design Authority requirements. * Flexible and reactive support for new documentation tasks driven by the submarine operational programme, including delivery to demanding timelines. 3. Periodic Review of Safety (PRS) Support * Full-time technical support to the PRS Lead, managed through the Design Authority PRS Assistant Head role. * Subject matter review and assessment activity contributing to the successful delivery of the Naval Base PRS programme. 4. Intelligent Customer (IC) Support * Independent IC support to the Design Authority Safety Justification Delivery Manager (SJDM). * Provision of an experienced safety engineer to assess NSSJ documentation during production, review, and approval stages. * Assurance that IC activities remain independent from document authorship and production. 5. Continuous Improvement and Knowledge Transfer * Support to the Naval Base in fostering a culture of continuous improvement in nuclear safety management. * Knowledge sharing and mentoring to enhance internal capability and resilience within the Authority. Delivery Context and Experience Requirements The service provider is required to bring a high level of knowledge and experience in nuclear safety case management, with a strong understanding of the MOD environment. This includes experience of operating within the challenges of balancing a demanding military operational programme with the stringent requirements of nuclear safety regulation. The provider is expected to work within established HMNB Devonport nuclear safety management arrangements while applying relevant external experience and best practice to enhance safety performance.

Lot Information

Lot 1

Options: option to extend by 2 x 1 year periods

Renewal: 2 x 1 year periods

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-064c87
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/079858-2026
Current Stage
Award
All Stages
Planning, Tender, Award

Procurement Classification

Notice Type
UK6 - Contract Award Notice
Procurement Type
Standard
Procurement Category
Services
Procurement Method
Open
Procurement Method Details
Competitive flexible procedure
Tender Suitability
SME
Awardee Scale
SME

Common Procurement Vocabulary (CPV)

CPV Divisions

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

98 - Other community, social and personal services

CPV Codes

71356300 - Technical support services

72224000 - Project management consultancy services

79417000 - Safety consultancy services

98113100 - Nuclear safety services

Notice Value(s)

Tender Value
£10,160,000 £10M-£100M
Lots Value
£10,160,000 £10M-£100M
Awards Value
£3,963,027 £1M-£10M
Contracts Value
Not specified

Notice Dates

Publication Date
21 Aug 20265 days ago
Submission Deadline
16 Jul 2026Expired
Future Notice Date
6 Mar 2026Expired
Award Date
20 Aug 20261 weeks ago
Contract Period
1 Nov 2026 - 31 Oct 2029 3-4 years
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Complete
Awards Status
Active
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
Submarine Delivery Agency
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
PLYMOUTH
Postcode
PL2 2BG
Postcode Area
Plymouth
Country
England
Major Region (ITL 1)
TLK South West (England)
Basic Region (ITL 2)
TLK4 Devon
Small Region (ITL 3)
TLK41 Plymouth
Delivery Location
Not specified
Local Authority
Plymouth
Electoral Ward
Devonport
Westminster Constituency
Plymouth Sutton and Devonport

Supplier Information

Number of Suppliers
1
Supplier Name

Nesc Limited

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

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