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. Last Updated: 07/27/2016

Radioactive Sub Sealed

MOSCOW () -- A Russian scientist says his team has sealed holes in a sunken nuclear submarine, preventing it from leaking radiation for at least two decades.

Anatoly Sagalevich said Wednesday the crew of scientists had patched the titanium hull of the submarine Komsomolets, which sank six years ago in the Norwegian Sea, Interfax reported.

The Komsomolets "will no longer pose a serious threat over the next 20 to 30 years," Sagalevich said.

Environmental experts had urged Russia to seal the submarine last year, saying radioactive plutonium could begin leaking any time from the submarine's nuclear reactor or two nuclear-tipped torpedoes.

The Komsomolets sank in April 1989 after catching fire 340 kilometers north of Norway. Forty-two sailors died.