The 17 000 Nuclear Objects Dumped in the Kara Sea


“Having the exact coordinates for the dumped container with the nuclear reactors from K-19 submarine is undoubtedly good news,” says nuclear safety expert Andrey Zolotkov. Zolotkov hopes for risk assessments to be carried out soon with the aim to see how the nuclear reactors could be lifted out of the maritime environment and brought to a yard for safe decommissioning…More than 50 years have passed since the dumping.

In the so-called “White Book” on dumped nuclear objects, originally published by President Boris Yeltsin’s environmental advisor Alexei Jablokov, the dumping of the submarine’s two reactors is listed for the Abrosimova Bay on the east coast of the Kara Sea, but exact location hasn’t been confirmed.

It was in August 2021 that the the crew on “Akademik M. Keldysh” with the help of sonars and submersibles found the container. Both marine researchers, oceanology experts from Russia’s Academy of Science and representatives of the Ministry of Emergency Situations are working together in the expedition team.

K-19 is one of the most infamous nuclear-powered submarines sailing for the Soviet navy’s Northern Fleet. In July 1961 the reactor lost coolant after a leak in a pipe regulating the pressure to the primary cooling circuit. The reactor water started boiling causing overheating and fire. Crew members managed to extinguish the fire but had big problems fixing the leak in an effort to save the submarine from exploding. Many of them were exposed to high doses of radioactivity before being evacuated to a nearby diesel submarine sailing in the same area of the North Atlantic. Eight of the crew members who had worked on the leak died of radiation poisoning within a matter of days.

The submarine was towed to the Skhval shipyard (No. 10) in Polyarny. Later, the reactor compartment was cut out and a new installed. The two damaged reactors, still with spent nuclear fuel, were taken north to the Kara Sea and dumped. Keeping the heavily contaminated reactors at the shipyard was at the time not considered an option.

In the spring of 2021, Russia’s Foreign Ministry invited international experts from the other Arctic nations to a conference on how to recover sunken radioactive and hazardous objects dumped by the Soviet Union on the seafloor east of Novaya Zemlya. Moscow chairs the Arctic Council for the 2021-2023 period. 

The two reactors from the K-19 submarine are not the only objects posing a risk to marine environment. In fact, no other places in the world’s oceans have more radioactive and nuclear waste than the Kara Sea. Reactors from K-11 and K-140, plus the entire submarine K-27 and spent uranium fuel from one of the old reactors of the “Lenin” icebreaker are also dumped in the same sea. While mentality in Soviet times was «out of sight, out of mind», the Kara Sea seemed logical. Ice-covered most of the year, and no commercial activities. That is changing now with rapidly retreating sea ice, drilling for oil-, and gas, and increased shipping…Additional to the reactors, about 17,000 objects were dumped in the Kara Sea in the period from the late 1960s to the early 1990s.

Excerpts from Thomas Nilsen, Expedition finds reactors 56 years after dumping, The Barents Observer, Sept. 2, 2021

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