Question 1

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

Accepted Answer

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

**Issuing Organization:**  
Canadian Nuclear Safety Commission (CNSC)  
**Location:** Ottawa, Ontario, Canada  
**Contact:** Lucie Frouin  
**Email:** solicitation-demandedesoumission@cnsc-ccsn.gc.ca

**Important Dates:**  
- **Posted Date:** February 16, 2026  
- **Due Date for Proposals:** March 16, 2026, at 2:00 PM (Eastern Daylight Time)  
- **Performance Period:** 36 months from the date of contract signing

**Project Scope & Objectives:**  
The CNSC is seeking qualified Offerors to conduct a study focused on enhancing the understanding of fluidelastic instability (FEI) in nuclear steam generators, specifically regarding the structural integrity of tube arrays under two-phase flow conditions. The study comprises three interrelated components:  
1. **Test Setup Establishment:** Create a configuration for observing local void fraction behavior and flow-induced responses in tube arrays, mimicking CANDU steam generators under controlled two-phase flow.  
2. **Flow Assessments Execution:** Assess flow across multiple test sections utilizing representative pitch ratios and varying flow conditions (50 to 500 kg/m²·s mass flux).  
3. **Data Collection & Analysis:** Generate a structured dataset to support regulatory assessments and future studies on streamwise fluidelastic effects.

**Mandatory Qualifications:**  
- Offerors must possess legal capacity to contract and provide supporting documentation upon request.  
- Firms must comply with Canada's Code of Conduct for Procurement.  
- Must be registered Canadian suppliers or suppliers from applicable trading partners; non-trading partner submissions will be rejected.

**Set-Aside Requirements:**  
Only Canadian Suppliers and Suppliers of Applicable Trading Partners are eligible for this solicitation.

**Geographic Restrictions:**  
Offers must originate from Canada or applicable trading partners as defined by the solicitation.

**Key Technical Capabilities Needed:**  
- Expertise in fluid mechanics and engineering principles related to fluidelastic instability.  
- Experience with experimental setups in two-phase flow scenarios.  
- Proficiency in data collection and analysis methods relevant to fluid dynamics.

**Deliverables & Performance Standards:**  
Deliverables include a comprehensive dataset and reports that detail findings regarding fluidelastic behavior in tube arrays. Performance standards will be evaluated based on data integrity, relevance to nuclear steam generator operations, and compliance with defined testing parameters.

**Evaluation Criteria:**  
Proposals will undergo a multi-level evaluation focusing on technical merit, experience, and the ability to meet the project requirements efficiently. Specific evaluation methods include assessment of the technical approach, qualifications of team members, and prior experience with similar projects.

**Preferred Qualifications:**  
- Previous experience in research related to nuclear engineering or steam generator technology is advantageous.  
- Demonstrated commitment to net-zero greenhouse gas emissions targets may enhance proposal competitiveness.

This summary encapsulates the critical elements of the opportunity to facilitate alignment between prospective Offerors and the CNSC's requirements for this project.

Question 2

When is the proposal submission deadline?

Accepted Answer

The proposal submission deadline is March 16, 2026 (5 days left).

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

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