Any claims about 100 years of trouble-free operations of a nuclear reactor is a wishfull thinking at best.

For example, in France nuclear power reactors were stopped because unexpected cracks appeared in pipes after just 25 years of operations requiring expensive maintenance, https://oilprice.com/Latest-Energy-News/World-News/France-Cl... That put reactors off-line for over a year.

Then Sweeden closed one of its reactors because it bacame unprofitable due to raising maintainance costs, https://apnews.com/article/technology-business-sweden-europe...