Hi, Which are the major falws of an RBMK reactor. I have found three: 1. fixed graphite moderator that doesn't act as the LWR reactor to slow down the chain fissions when the temprature in the core gets to hot 2. the missing containment building ,or inapropiate one . Can someone explain what wasthe issue of the RBMK containment building, cause on wikipedia it is said that the RBMK has a caontainment building , and the documentaries over Chernobyl that I've seen show a containment building with a seeiling of many hundreds -thousand tones of concrete 3. the control rods had a graphite head, which were increasing the reactivity in the first miliseconds when the control rods were introduced. I do not want to focus on what happened at Chernobyl. I'm very much interested why the EU doesn't accepteven now the so called improved RBMKs that were present in Slovakia and Bulgaria. I must confese though that I do not know details about those improvements.