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The purpose of the meeting is to disseminate the findings of the coordinated research project (CRP) entitled “Developing a Phenomena Identification and Ranking Table (PIRT) and a Validation Matrix, and Performing a Benchmark for In-Vessel Melt Retention” to stakeholders, including researchers, policymakers and industry representatives, with the aim of maximizing the impact and application of the CRP’s outcomes.
Another key objective of the meeting is to invite Member States not involved in this CRP to present their activities related to in-vessel melt retention for high-power reactors This will facilitate an exchange of insights, foster discussions on results, and explore opportunities for future collaboration.
Specific objectives of the meeting are as follows:

• Share knowledge on current and emerging projects, disseminate the outcomes of the IAEA’s CRP on IVMR, including advancements in understanding the physical phenomena involved, highlight ongoing and emerging projects and developments in IVMR technologies across Member States.
• Discuss the critical drivers such as safety enhancements and regulatory demands.
• Examine challenges in demonstrating safety when implementing IVMR strategies, including technological challenges, such as heat transfer optimization, material performance, and operational integration, share lessons learned from existing implementations and experimental validations.
• Identify opportunities for further development in water cooled reactor (WCR) technology by integrating new materials and advanced systems designed to improve IVMR performance.
• Evaluate potential future research needs, directions and collaboration opportunities, assess gaps in current research and propose directions for future investigations, foster international collaboration, and explore potential co-development projects.

All persons wishing to participate in the event have to be designated by an IAEA Member State or should be members of organizations that have been invited to attend.
In order to be designated by an IAEA Member State or invited organization, participants are requested to submit their application via the InTouch+ platform (https://intouchplus.iaea.org) to the competent national authority (Ministry of Foreign Affairs, Permanent Mission to the IAEA or National Atomic Energy Authority) or organization for onward transmission to the IAEA by 15 April 2025, following the registration procedure in InTouch+.