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R803.1-Structural Integrity of Nuclear Steam Generators against In-line (Streamwise) Fluidelastic Instability

Solicitation number 5000088650/A

Publication date

Closing date and time 2026/03/16 14:00 EDT

Last amendment date

Status Status Expired

Description

Reissue of Solicitation of Offers. This solicitation of offers cancels and supersedes previous solicitation of offers number 5000088650 dated November 4, 2025 with a closing of December 4, 2025 at 2:00 PM.

Canada is seeking offers from qualified Offerors to provide professional services to deliver the “Enhanced understanding of fluidelastic instability (FEI) in nuclear steam generators, specifically in the streamwise (in-line) direction, to ensure the long-term reliability and structural integrity of tube arrays under two-phase flow conditions” study to Canadian Nuclear Safety Commission.
The scope of this study includes the following three interrelated components:
• Establishing a test setup to facilitate observation and assessment of local void fraction behavior and flow-induced responses in tube arrays representative of CANDU steam generators. The setup is based on established configurations and industry knowledge, with the goal of supporting technical evaluation under controlled two-phase flow conditions.
• Execution of flow assessments using multiple test sections with representative pitch ratios. Tests are conducted across a range of flow conditions (approximately 50 to 500 kg/m²·s mass flux) to capture relevant stability behavior under typical operating parameters.
• Data collection and technical analysis to generate a structured dataset that can support future studies and inform regulatory assessments. The results contribute to an improved understanding of how tube arrays respond under various conditions, particularly regarding the onset and behavior of streamwise fluidelastic effects.

RETURN OFFERS: by email only to: solicitation-demandedesoumission@cnsc-ccsn.gc.ca

Contract duration

The estimated contract period will be 36 month(s).

Trade agreements

  • Canada-Chile Free Trade Agreement (CCFTA)
  • Canada-Peru Free Trade Agreement (CPFTA)
  • Canada-Colombia Free Trade Agreement
  • Canada-Panama Free Trade Agreement
  • Canada-Honduras Free Trade Agreement
  • Canada-Korea Free Trade Agreement (CKFTA)
  • Canadian Free Trade Agreement (CFTA)

Reason for limited tendering

A contracting officer can use limited tendering for specific reasons outlined in the applicable trade agreements. The reason for this contract is described below:

  • None

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Contact information

Contracting organization

Organization
Canadian Nuclear Safety Commission (CNSC)
Address

280 Slater street

Ottawa, Ontario, K1P 1C2
Canada
Contracting authority
Lucie Frouin
Email
solicitation-demandedesoumission@cnsc-ccsn.gc.ca
Address

280 Slater street

Ottawa, Ontario, K1P 1C2
Canada
Bidding details
Full details regarding this tender opportunity are available in the documents below. Click on the document name to download the file. Contact the contracting officer if you have any questions regarding these documents.
Caption
Document title Amendment no. Language Unique downloads Date added
5000088650A-NPP-EN.pdf 001 EN 19 2026/02/16
5000088650A-Solicitation-EN_1.pdf 001 EN 21 2026/02/16
5000088650A-AMP-FR.pdf 001 FR 8 2026/02/16
5000088650A-Invitation-FR_0.pdf 001 FR 12 2026/02/16
Access the Getting started page for details on how to bid, and more.

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Summary information

Notice type
Request for Proposal
Language(s)
English, French
Region(s) of delivery
National Capital Region (NCR)
Contract duration
36 month(s)
Procurement method
Competitive – Open Bidding
Selection criteria
Highest Combined Rating of Technical Merit and Price
Commodity - UNSPSC
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