''K-11'' was a Soviet (Project 627A) nuclear-powered attack submarine that had two reactor accidents during loading of the nuclear reactor core in

Severodvinsk Severodvinsk ( rus, Северодвинск, p=sʲɪvʲɪrɐdˈvʲinsk) is a city in the north of Arkhangelsk Oblast, Russia, located in the delta of the Northern Dvina, west of Arkhangelsk, the administrative center of the oblast. As of the 2 ...

on 7 and 12 February 1965.Атомные подводные лодки пр. 627 (Nuclear-powered Submarines of Pr. 627)
/ref> Reasons for the accidents included nonobservance of operating instructions by those participating in the lift of the reactor cover and the mistaken decision to continue refueling after the first accident. There were no fatalities but those accidents (ejection of radioactive steam and inappropriate fire extinguishing methods on 12 February) caused an unsafe release of radiation into the environment and nearby shipyard area. Seven men were treated for exposure to radiation.
/ref> The reactor compartment holding the two damaged reactors was removed, partially decontaminated and sunk in Abrosimov Bay (east coast of

Novaya Zemlya Novaya Zemlya (, also , ; rus, Но́вая Земля́, p=ˈnovəjə zʲɪmˈlʲa, ) is an archipelago in northern Russia. It is situated in the Arctic Ocean, in the extreme northeast of Europe, with Cape Flissingsky, on the northern island, ...

) in the

Kara Sea The Kara Sea (russian: Ка́рское мо́ре, ''Karskoye more'') is a marginal sea, separated from the Barents Sea to the west by the Kara Strait and Novaya Zemlya, and from the Laptev Sea to the east by the Severnaya Zemlya archipelago. ...

in 1966. A new reactor compartment was installed and the submarine continued to perform her duties from August 1968 (performed five long-range cruises in 1968–1970 including patrol missions in the

Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ea ...

, four long-range cruises in 1975–1977, five long-range cruises in 1982–1985) until decommissioning on 19 April 1990. ''K-11'' passed the milestone of 220,179 miles traveled in 1988. The submarine has been laid up in

Gremikha Bay Gremikha Bay (russian: Губа Гремиха) is a bay on the northeastern portion of the Kola Peninsula in the far northwest of Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe a ...

since of 2000.

References

External links

Bellona Report on Project 627, 627 A (Kit) November Class Submarines

* ttp://spb.org.ru/bellona/ehome/russia/nfl/nfl8.htm#O8 Describes the 1965 incident that occurred on 7 and 12 February {{DEFAULTSORT:K-011 November-class submarines Ships built in the Soviet Union 1961 ships Cold War submarines of the Soviet Union