Well, what was then the "standard operating procedure" in dealing with all that radioactive waste? No, I'm not asking for quoted texts by the book for how thing

Well, what was then the "standard operating procedure" in dealing with all that radioactive waste? No, I'm not asking for quoted texts by the book for how things should go when everything's OK, I'm interested more in how a large scale contamination should be (or should have been) dealt with? That, if there ever was such an assumed scenario after Chernobyl, of course...