An enclosed space or facility to contain and prevent the escape of hazardous material.

Prevention of the replication of the products of recombinant deoxyribonucleic acid technology outside the laboratory.

1. Provision of a gastight enclosure around the highly radioactive components of a nuclear power plant, to contain the radioactivity released by a possible major accident.

2. The use of remote-control devices (slave apparatus) to remove spent cores from nuclear power plants or, in shielded laboratory hoods, to perform chemical studies of dangerous radioactive materials.