Jacques Jabbour (PhD) is a research engineer in nuclear safety assessment specialized in concrete durability and Internal Swelling Reactions (ISR). He received his PhD degree in Material Sciences and Civil Engineering (Development of accelerated ageing test methods for concrete) from Ecole Normale Superieure Paris-Saclay (France) in 2018. Since 2014, he conducts research campaigns on the subject of ISR (Alkali-Silica Reaction, Delayed Ettringite Formation…). He is the author of one patent on the development of a new structural surveillance technic using embedded fibre optics cables this subject. He is also recurrently asked as expert for the assessment of the impact of concrete ageing and ISR on existing nuclear concrete structures in support to inspection teams from the French nuclear safety authority.