03/06/2026
Between 1946 and 1990, several European countries including the United Kingdom, France, Belgium, Switzerland, the Netherlands, and others dumped over 200,000 barrels of low- and intermediate-level radioactive waste into the Northeast Atlantic Ocean at depths exceeding 4,000 meters.
These barrels, often encased in bitumen, asphalt, or cement, contained contaminated materials from nuclear operations such as sludges, resins, and metal parts, totaling tens of thousands of tonnes with significant radioactivity. At the time, ocean disposal was viewed as a safe, convenient solution far from human populations.
Decades later, these rusting containers on the abyssal plains pose a growing environmental concern. Recent scientific missions, including France-led expeditions using advanced underwater robots, have mapped thousands of barrels, with evidence of corrosion and some leakage already detected.
Radionuclides could enter the marine food web through sediments, plankton, and deep-sea organisms, potentially spreading via ocean currents. While current levels remain low compared to historical nuclear fallout, long-term risks include bioaccumulation in fish consumed by humans, ecosystem disruption, and possible contamination of fisheries or coastal areas if significant releases occur.
As climate-driven changes affect ocean circulation and with barrels deteriorating further, this submerged legacy demands ongoing monitoring to prevent future human and ecological costs.