Research Project R563.1 - Evaluation of Probabilistic leak-before-break methodologies for the CNSC
Solicitation number 87055-14-0114
Publication date
Closing date and time 2014/08/22 15:00 EDT
Last amendment date
Description
The CANDU industry in Canada has successfully demonstrated LBB for pressure tubes using deterministic methodologies for decades; however, fracture toughness properties of the pressure tubes downgraded by an increase in hydrogen concentration challenges current assessments. The deterministic approach is supported by fracture mechanics methodologies with experimentally determined material toughness properties. Leak-Before-Break must be demonstrated for pressure tubes in operating CANDU reactors with hydrogen concentration above the terminal solid solubility of hydrogen dissolution at a sustained temperature. The primary focus is pressure tube failure from a volumetric flaw after crack initiation and subcritical crack growth by Delayed Hydride Cracking (DHC) at the operating temperature. In response to assessed limitations in the current LBB approach, a new probabilistic LBB framework consisting of Level 1 and Level 2 methodologies has been proposed by the CANDU industry. Even though the probabilistic approach is permitted by CSA Standard N285.8-10, the probabilistic LBB methodology has yet to be accepted by the Canadian Nuclear Safety Commission. Similarly, other nuclear regulators have yet to accept the probabilistic LBB methodologies.
Contract duration
Refer to the description above for full details.
Trade agreements
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North American Free Trade Agreement (NAFTA)
Contact information
Contracting organization
- Organization
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Canadian Nuclear Safety Commission
- Address
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280 Slater StreetOttawa, Ontario, K1P5S9Canada
- Contracting authority
- Cassol, Alex
- Phone
- 613-996-6638
- Address
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280 Slater StreetOttawa, ON, K1P 5S9CA
Buying organization(s)
- Organization
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Canadian Nuclear Safety Commission
- Address
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280 Slater StreetOttawa, Ontario, K1P5S9Canada
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.
Document title | Amendment no. | Language | Unique downloads | Date added |
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87055-14-0114_questions_and_answers-questions_et_reponses_no_2.pdf |
English
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11 | ||
87055-14-0114_questions_and_answers-questions_et_reponses_no_2.pdf |
French
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11 | ||
87055-14-0114_r563.1_questions_et_reponses.pdf |
English
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6 | ||
87055-14-0114_r563.1_rfp_revised_scoring_grid.pdf |
English
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13 | ||
87055-14-0114_r563.1_question_and_answers_1.pdf |
English
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14 | ||
87055-14-0114_r563.1_question_and_answers_1.pdf |
French
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14 | ||
87055-14-0114_r563.1_questions_et_reponses.pdf |
French
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6 | ||
87055-14-0114_r563.1_grille_de_pointage_detaille_revise.pdf |
French
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0 | ||
87055-14-0114_563_1_revised_english_rfp-evaluation_of_probabilistic_leak-before-break_methodologies.pdf | 000 |
English
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72 | |
87055-14-0114_ddp_projet_de_recherche_563.1-revise.pdf | 000 |
French
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4 |
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