Radioactive Discharge Accident
On 2 March 1965, K-159 suffered an accident involving radioactive discharges into her steam generators, almost certainly primary coolant leaks from the tubes into the steam chest and thence into the turbines, contaminating her entire propulsion plant. If so, the leaking tubes were plugged, because she continued to operate for another two years before entering the shipyard from 1967 through 1968 for overhaul and to have her steam generators replaced. She returned to the shipyard from 1970 through 1972 for further repairs and refuelling, and then again from 1979 through 1980 for still more repairs.
Read more about this topic: Soviet Submarine K-159
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