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AwardedFind a Tender · award

Provision of ANSWERS/FISPIN Nuclear Software Codes

Buyer: UNITED KINGDOM NATIONAL NUCLEAR LABORATORY LIMITED →

BuyerUNITED KINGDOM NATIONAL NUCLEAR LABORATORY LIMITED
StatusAwarded
DeadlineNot published
ValueValue not published
Published19 Aug 2026

What is being bought

This contract is for the renewal of licences for the ANSWERS/FISPIN nuclear software suite, including specialist codes used for nuclear safety analysis, criticality assessments, radiation transport, shielding calculations, and reactor physics modelling. The software supports established analytical methodologies and regulatory-approved processes across UKNNL's nuclear modelling and safety case activities. The contract provides software licences, maintenance, updates, and technical support for a period of three years.

Lot details

Lot 1

No lot description published.

Statuscomplete

Comparable-procurement analytics

No usable CPV category has been published, so a comparable market set cannot yet be built.

Procurement strategy & market signals

Framework agreementNot published
Dynamic purchasing systemNot published
Competitive procurementNot published
Recurring requirementNot published
Procurement method rationaleThe contracting authority intends to award the contract without prior publication due to the absence of competition for technical reasons. The ANSWERS/FISPIN software suite is proprietary and is only available from Energy, Safety and Risk Consultants (UK) Ltd. The software is embedded within existing UKNNL analytical methodologies, validated models, and regulatory-approved processes. There are no reasonable alternative solutions capable of meeting the contracting authority's requirements without significant revalidation, regulatory approval, retraining, and disruption to ongoing nuclear safety and engineering programmes. Replacing the software would result in substantial additional cost, programme delay, and technical risk. The supplier is therefore the only economic operator capable of providing the required licences and associated support services.
Rationale classificationssingleSuppliersTechnicalReasons
Special regimeNot published
Covered byNot published
Submission policyNot published
Selection criteriaNot published
Risk detailsNot published

Planning & early market engagement

BudgetNot published
No-engagement rationaleNot published
Planning documents0
Planning milestones0

No planning milestones published.

Related procurements

No linked framework, prior procurement or reprocurement published.

Awards

Documents & submission route

  • Not published

Source data inventory

Diagnostic view. “Not published” means this current release does not provide a value.

OCIDocds-h6vhtk-06e816
Latest release ID079231-2026
Latest release timestampWed Aug 19 2026 18:37:19 GMT+0000 (Coordinated Universal Time)
Sourcefind-a-tender
Official notice URLNot published
Tender statuscomplete
Procurement methoddirect
Procurement method detailsDirect award
Main procurement categoryNot published
Above thresholdNot published
Legal basis2023/54
Tender period: startNot published
Tender period: endNot published
Expression of interest deadlineNot published
Enquiry deadlineNot published
Award period: startNot published
Award period: endNot published
Submission method detailsNot published
Submission languagesNot published
Electronic catalogue policyNot published
Total tender valueNot published
Tender lots in source1
Tender items in source0
Tender documents in source1
Awards in latest release1
Contracts in latest release0
Parties in latest release2

Notice history

DateEventReference
19 Aug 2026award, contract079231-2026

All source data

Unmodified official OCDS data retained by Tenderline for this procurement process.

Complete current OCDS release JSON
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Complete JSON history (1 releases)
19 Aug 2026 · 079231-2026 · award, contract
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