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PROCUREMENT OPPORTUNITY

Provision of ANSWERS/FISPIN Nuclear Software Codes

UNITED KINGDOM NATIONAL NUCLEAR LABORATORY LIMITED · Transparency notice on Find a Tender

Tender information last checkedLast checked 25 Sept 2026, 16:12.

Opportunity overview

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.

Awarded to

Amounts belong to published awards or contracts. Where several suppliers share one value, it is labelled as shared and is not a supplier-specific allocation.

Classification

No classification was supplied.

Lots

  • Lot 1Value not stated

Documents and notices

Published notice details

Additional information from the published procurement release. Fields appear only when supplied by the source; check the original notice and tender documents before acting.

Scope, procedure and submissions

Id
NNLC739
Status
complete
Procurement Method
direct
Procurement Method Details
Direct award
Why this procedure was chosen
The 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.

Legal basis

Id
2023/54
Scheme
UKPGA

Procedure reasons

Entry 1
Id
singleSuppliersTechnicalReasons

Lots and requirements

Entry 1
Id
1
Status
complete

Published documents

Entry 1
Id
conflictOfInterest
Document Type
conflictOfInterest
Description
Not published

Buyer, suppliers and contacts

Organisation 1
Name
UNITED KINGDOM NATIONAL NUCLEAR LABORATORY LIMITED
Id
GB-COH-03857752

Identifier

Scheme
GB-COH
Id
03857752

Additional Identifiers

Entry 1
Scheme
GB-PPON
Id
PVXT-8784-YGNV

Address

Street Address
Chadwick House Warrington Road
Locality
Warrington
Postal Code
WA3 6AE
Country
GB
Country Name
United Kingdom
Region
UKD61

Contact

Roles

buyer

Details

Classifications

Entry 1
Scheme
UK_CA_TYPE
Id
publicAuthoritySubCentralGovernment
Description
Public authority - sub-central government
Organisation 2
Name
ENERGY, SAFETY AND RISK CONSULTANTS (UK) LIMITED
Id
GB-COH-07825532

Identifier

Scheme
GB-COH
Id
07825532

Additional Identifiers

Entry 1
Scheme
GB-PPON
Id
PZCC-7721-QDLQ

Address

Street Address
305 Bridgewater Place
Locality
Warrington
Postal Code
WA3 6XF
Country
GB
Country Name
United Kingdom
Region
UKD61

Contact

Roles

supplier

Details

Scale
large
Vcse
No

Award information

Award 1
Id
1
Status
pending
Main Procurement Category
goods
Above Threshold
Yes

Items

Item 1
Id
1
Related Lot
1

Additional Classifications

Entry 1
Scheme
CPV
Id
48000000
Description
Software package and information systems

Delivery locations

Entry 1
Region
UK
Country
GB
Country Name
United Kingdom

Value

Including VAT
723,974
Amount
603,312
Currency
GBP

Suppliers

Supplier 1
Id
GB-COH-07825532
Name
ENERGY, SAFETY AND RISK CONSULTANTS (UK) LIMITED

Contract period

Starts
1 Sept 2026, 00:00
Ends
31 Aug 2029, 23:59

Related lots

1

Documents

Entry 1
Id
079231-2026
Document Type
awardNotice
Notice Type
UK5
Description
Transparency notice on Find a Tender
Published
19 Aug 2026, 19:37
Format
text/html

Milestones

Entry 1
Id
1
Type
futureSignatureDate
Due
1 Sept 2026, 23:59
Status
scheduled

Recorded locations

  • Buyer location · Warrington · UKD61 · WA3 6AE · United Kingdom

Notice and amendment history

1 published notice version reviewed by ProcuraAxis.

1 VERSION
  1. 079231-2026Transparency notice on Find a Tender ·