an underground atomic test in French Polynesia
One of the last French underground nuclear tests around 1995. Water from the lagoon of Mururoa Atoll in French Polynesia suffered the shock wave from the basement. Unlike atmospheric tests or serious reactor accidents, underground tests do not directly release radioactive material. The radioactivity is contained in principle in depth, but contamination can occur on the surface if the rock is cracked.
CEA/DAM