SESSION RECORDING: https://youtu.be/tJhFCXASAVI Moderator: Claire COUSINS (former ICRP MC Chair, UK) Introduction Moderator Atomic Bombing, Suffering and Science Ohtsura NIWA (RERF, Japan) Q&A Session

SESSION RECORDING: https://youtu.be/3UlOTLa1ytY Presentations of Cousins Award Finalists Co-chair: Claire Cousins (former ICRP MC Chair, UK) Introduction Co-chair A Biokinetic Model to Assess Radon Uptake by the Fetus in Pregnant Women Ämilie Degenhardt (BfS, Germany) PregiDose: A Mobile Application Designed Through a User-Centered Approach to Enhance Fetal Dosimetry and Wellbeing Among Pregnant Radiographers Hafsa Essop (University of Pretoria, South Africa) Rethinking Tissue Reactions to Radiation: The Tissue-Sparing Effect as a Threshold for Radiation-Induced Male Infertility Hisanori Fukunaga (Hokkaido University, Japan) To Leave or Not to Leave: A Tiered Assessment of the Impacts of Scale Residue From Decommissioned Offshore Oil and Gas Infrastructure in Australia Amy MacIntosh (Macquarie University & ANSTO, Australia) Presentations of Invited Young Scientists and Professionals Co-chairs: Akihiro SAKODA (JAEA, Japan), Sara DUMIT (ICRP & LANL, USA) Rapporteur: Shinnosuke MATSUMOTO (Tokyo Metropolitan University, Japan) Introduction Co-chairs Introduction of Related Video and Poster Presentations Rapporteur: Shinnosuke MATSUMOTO (Tokyo Metropolitan University, Japan) The Future of Radiation Protection for Young Professionals with Experiences of the IRPA Young Generation Network Takahiko Kono (JHPS YGN & IRPA YG, Japan) What Does Social Science Have to do With Radiation Protection? Maren Gruß (BfS, Germany) Q&A Session Takahiko KONO & Maren Gruß

SESSION RECORDING: https://youtu.be/k0W1Uc3Ken0 Co-chairs: Simon Bouffler (ICRP & UKHSA, UK), Tatsuhiko IMAOKA (QST, Japan) Rapporteur: Luana Hafner (ENSI, Switzerland) Introduction Co-chairs Introduction of Related Video and Poster Presentations Rapporteur: Luana Hafner (ENSI, Switzerland) Individual Differences in Medical Radiation Exposure in CT Dosimetry Based on Age and BMI Weishan Chang (Tokyo Metropolitan University, Japan) Individualizing Radiation Cancer Risk: Insights from Animal Studies Tatsuhiko Imaoka (QST, Japan) The Case for Individualisation of Radiological Protection in Medicine Colin J Martin (University of Glasgow, UK) Doses and Risks in Common Medical Examinations - Impact of Age and Sex Richard Wakeford (University of Manchester, UK) Q&A Session

SESSION RECORDING: https://youtu.be/huotcUutN9k Co-chairs: Nicole Martinez (ICRP & Clemson University, UK), Keiko Tagami (QST, Japan) Rapporteur: Adrienne Ethier (CNSC, Canada) Introduction of Related Video and Poster Presentations Rapporteur: Adrienne Ethier (CNSC, Canada) Ensuring that Environmental Radiological Protection Remains Fit for Purpose and Science Based: Ongoing Work of Task Groups 99 and 105 Christelle Adam-Guillermin (IRSN, France) Andy Mayall (EA, UK) Jacqueline Garnier-Laplace (NEA, France) Environmental Radiological Impacts of the Nuclear Industry from Mining, to Construction, Operation and Decommissioning of a Power Station Peter Bryant (Sizewell C / WNA, UK) Jim Hondros (WNA, Australia) Q&A Session

SESSION RECORDING: https://youtu.be/TwQEXeQgy7Q Co-chairs: Ludovic Vaillant (ICRP & CEPN, France), Michiya Sasaki (ICRP & CRIEPI, Japan) Rapporteur: Constantinos Zervides (MEDI, Cyprus) Classification of Harmful Radiation-induced Effects on Human Health for Radiological Protection Purposes: History and Concepts Friedo Zölzer (U South Bohemia, Czech Republic) Is Cancer Risk of Radiation Probabilistic or Deterministic? Nori Nakamura (RERF, Japan) Revisiting Radiation Dose-Response for Tissue Reactions Haruyuki Ogino (NRA, Japan) Task Group 123: Classification of Harmful Radiation-induced Effects on Human Health for Radiological Protection Purposes Liz Ainsbury (UKHSA, UK) Q&A Session

SESSION RECORDING: https://youtu.be/pmRQqRI2d7M Co-chairs: Thierry Schneider (ICRP & CEPN, France), Haruyuki Ogino (ICRP & NRA, Japan) Rapporteur: Momo Takada (AIST, Japan) Introduction Co-chair A Proposed Framework for Reasonable: Relationships, Rationale, and Resources Nicole Martinez (ICRP, USA) Summary of the ICRP-WNA Workshop on Optimisation Marcel Lips (WNA, Switzerland) How can Reasonableness and Tolerability be Considered in Implementing Optimisation in the Decision-making Process? Jacqueline Garnier-Laplace (OECD/NEA, France) ICRP TG 114, Application of Tolerability and Reasonableness in the Medical Field Marie-Claire Cantone (University of Milan, Italy) Introduction of Related Video and Poster Presentations Rapporteur: Momo Takada (AIST, Japan) Panel Discussion Tolerability & Reasonableness: Views from IRPA Bernard le Guen (IRPA, France) A Benchmark for Comparing Radiation-related Cancer Risk Among Countries: Baseline Cancer Rates of Incidence and Mortality Jun Hirouchi (JAEA, Japan) Q&A Session including members of ICRP TG114

SESSION RECORDING: https://youtu.be/Q1Zt5XImlp4 Co-chairs: Prakash Hande (ICRP & National U of Singapore, Singapore), Yoshiya Shimada (ICRP & IES, Japan) Rapporteur: Hisanori Fukunaga (Hokkaido University, Japan) Introduction Co-chairs Introduction of Related Video and Poster Presentations Rapporteur: Hisanori Fukunaga (Hokkaido University, Japan) The Work of ICRP Task Group 121 - the Effects of Preconceptional and Intrauterine Exposures Richard Wakeford (University of Manchester, UK) A Multidisciplinary Challenge to Assess the Next-generation Risks of Low-dose-rate Long-term Gamma-ray Exposure by Whole-genome Sequencing in the Mouse Model Yoichi Gondo (Tokai University, Japan) History and Future Prospects of RERF Studies on Offspring of Atomic Bomb Survivors Asao Noda (RERF, Japan) Whole Genome Sequencing Analysis for Understanding Next Generation Effects of Radiation Exposure Arikuni Uchimura (RERF, Japan) Lack of Transgenerational Effects of Ionizing Radiation Exposure in Cleanup Workers and Evacuees of the Chornobyl Accident Meredith Yeager (NCI/NIH, USA) Q&A Session

SESSION RECORDING: https://youtu.be/jm7kAkjizx0 Co-chairs: Analia CANOBA (ICRP & ARN, Argentina), Hiroko Yoshida (ICRP & Tohoku University, Japan) Rapporteur: Yuji Inukai (C-Technol, Japan) Introduction of Related Video and Poster Presentations Rapporteur: Yuji Inukai (C-Technol, Japan) Breakthroughs of Task Group 127 Analia CANOBA (ICRP & ARN, Argentina) Is NORM always an Existing Exposure Situation? Christopher Jones (AWE, UK) Some Issues in the Implementation of the Current System of Protection Analia Canoba (ARN, Argentina) Connections between Categories of Exposure in the Hospital Setting Lorenzo Nicola Mazzoni (Medical Physics Unit Prato-Pistoia, AUSL Toscana Centro, Italy) Issues and Confusions in an Existing Exposure Situation After the Fukushima Accident Hiroko Yoshida (Tohoku University, Japan) Exposure Categories & Situations in the Current System of Radiation Protection: Main Challenges and IAEA’s Activities to Assist its Members Sates in Addressing Them Olvido Guzmán (IAEA, Austria) Q&A Session

SESSION RECORDING: https://youtu.be/4PjnfYj1GpE Co-chairs: Anne Nisbet (ICRP & UKHSA, UK), Satoshi Tashiro (Hiroshima University, Japan) Rapporteur: Kotaro TANI (QST, Japan) Introduction of Related Video and Poster Presentations Rapporteur: Kotaro TANI (QST, Japan) Medical System for Radiation Emergency in Japan Takako Tominaga (QST, Japan) The Work of ICRP TG120 on Radiation Emergencies and Malicious Events Anne Nisbet (UKHSA & Chair ICRP TG120, UK) New WHO Policy Advice on National Stockpiles for Radiological and Nuclear Emergencies Zhanat Carr (WHO, Switzerland) Communicating Radiation Emergencies on Social Media Maren Gruß (ICRP & BfS, Germany) Q&A Session

SESSION RECORDING: https://youtu.be/GAq7FT6ZVRg Co-chairs: Colin J Martin (ICRP & University of Glasgow, UK), Makoto Hosono (ICRP & Kindai University, Japan) Rapporteur: Yumi Lee (Yonsei University, Republic of Korea) Introduction of Related Video and Poster Presentations Rapporteur: Yumi Lee (Yonsei University, Republic of Korea) A Survey of Image Guided Radiation Therapy Practices around the Globe Colin J Martin (University of Glasgow, UK) Fit for Purpose: Dose Optimization in Radiotherapy Imaging in a Large Organization Tomas Kron (Peter Mac, Australia) Development of a Methodology for Measurement of Dose for Cone Beam CT Scans in Radiotherapy Mario Djukelic (Sir Charles Gairdner Hospital, Australia) Image-guided Heavy Ion Therapy Shinichiro Mori (QST, Japan) Q&A Session

SESSION RECORDING: https://youtu.be/gR71kDufK_Y Co-chairs: Nobuhiko BAN (ICRP & NRA, Japan), Julie BURTT (ICRP & CNSC, Canada) Rapporteur: Tatsuki KIMURA (CRIEPI, Japan) Outline of the Session Co-chairs Introduction of Related Video and Poster Presentations Rapporteur: Yumi Lee (Yonsei University, Republic of Korea) Unique Aspects of Justification in Medicine: An Ethical Way Forward for the Radiological Protection Community (& short Q&A) Sergio Salerno (University of Palermo, Italy) All-hazard Approach to Preparedness and Response for Complex Disasters (& short Q&A) Terumasa Niioka (CAO, Japan) Panel Discussion Justification: Views from IRPA Bernard le Guen (IRPA, France) Flexible Application of the Justification Principle: The View of the NEA "Expert Group on International Recommendations" Sigurður Magnússon (OECD/NEA, Iceland) TBD Emilie van DeveNter (WHO, Switzerland) IAEA Activities in Relation to Justification of Medical Exposure Ola Holmberg (IAEA, Austria) Discussion