BORON isn’t going to do SHIT except prevent a reaction from going critical. In order to even get the boron where it needs to go, you’d have to open the containment vessels thus releaseing radiation… i suppose you could technically stuff boron in the spent fuel pool… but fucking how? how are you going to fill that pool up with boron? the heat is still the main problem, boron won’t fix that. Boron will only prevent the reaction from going critical (self sustaining). The immediate concern is the heat, they need to deal with the heat in order to keep everything contained.