The life of the disposal facility

The disposal facility of geological disposal of nuclear waste will be managed like below.
1,Seliction of the disposal plant(→how to choose disposal site)
2,Construction
3,From operation to closing(→how to close) more than 50 years
4,Closure

　After the underground disposal facility is closed, facility for institutional control will be remained. ll of the ground facilities will be removed after institutional control is finished. After the area can be used for another way.

Source : https://www.numo.or.jp/kagakutekitokusei_map/pdf/anzen_a3.pdf