4 required a protective Preventing_or_letting enclosure .

4 reactor were further enclosed in 2017 by the Chernobyl New Safe Confinement , a larger enclosure that allows Preventing_or_letting the removal of both the sarcophagus and the reactor debris , while containing the radioactive hazard .

Reflecting the Cold War tensions pandemic in late 1950s America , the enclosure – built of poured in place concrete and sprayed with pneumatically applied gunite – was advertised as having been built to withstand a nuclear attack .

It is held Hold within a large enclosure of fields and woodland—between a dual carriageway called `` Kempische Steenweg '' —in the village of Kiewit , approximately 7 km north of Hasselt .