Soviet submarine K-278 Komsomolets

K-278, 1 Jan 1986
History
Laid down	22 April 1978
Launched	9 May 1983
Commissioned	31 December 1984
Homeport	Bolshaya Lopatka at Zapadnaya Litsa
Fate	Sank due to fire on 7 April 1989, killing 47
Status	Located in the Barents Sea in 1,600 m (5,200 ft) of water with negligible release of radioactive material
General characteristics
Class and type	NATO Reporting Name "Mike"
Type	submarine
Displacement	4,400-5,750 tons surfaced, 6,400-8,000 tons submerged
Length	117.5 m (385 ft)
Beam	10.7 m (35 ft)
Draft	8 to 9 m (26 to 30 ft)
Propulsion	one 190 MW OK-650 b-3 pressurised water reactor, two 45000 shp steam turbines, one shaft
Speed	14 knots (26 km/h) surfaced, 26 to 30 knots (48 to 56 km/h) submerged
Test depth	1,000 m safe, 1,250 m design, 1,500 m crush
Complement	33 officers, 21 warrant or petty officers, 15 enlisted
Armament	SS-N-15 Starfish missiles 6 x 533 mm (21-inch) torpedo tubes for 53-65 torpedo

K-278 Komsomolets was the only Project 685 Плавник (Plavnik, meaning "fin", also known by its NATO reporting name of "Mike"-class) nuclear-powered attack submarine of the Soviet Navy. The boat sank in 1989 and is currently resting on the floor of the Barents Sea with its nuclear reactor and two nuclear warheads still on board.

Design

scheme of Mike-class

Project 685 was tasked with developing an advanced submarine that could carry a mix of torpedoes and cruise missiles with conventional or nuclear warheads. The order to design the submarine was issued in 1966 and design was completed in 1974. The first (and only) keel was laid down on 22 April 1978 at Severodvinsk. K-278 was launched on 3 June 1983 and commissioned on 28 December 1983.

K-278 had a double hull, the inner one being composed of titanium, which gave her an operating depth far greater than that of the best American submarines. The pressure hull was composed of seven compartments with the second and third protected by stronger forward and after bulkheads creating a "safety zone" in case of an emergency. An escape capsule was fitted in the sail above these compartments to enable the crew to abandon ship in the event of an underwater emergency. Initial Western intelligence estimates of K-278’s speed were based on the assumption that it was powered by a pair of liquid-metal lead-bismuth reactors. When the Soviet Union revealed that the submarine used a single conventional pressurized-water reactor, these estimates were lowered.

In October 1988, K-278 was honored by becoming one of the few Soviet submarines to be given an actual name: Комсомолец (Komsomolets, meaning "a member of the Young Communist League"), and her commanding officer, Captain 1st Rank Yuriy Zelenskiy was honored for diving to a depth of 1020 meters (3,345 feet).

Sinking

On 7 April 1989, while under the command of Captain 1st Rank Evgeny Vanin and running submerged at a depth of 335 metres (1,099 ft) about 180 kilometres (100 nmi) southwest of Bear Island (Norway), fire broke out in the aft compartment, and even though watertight doors were shut, the resulting fire spread through bulkhead cable penetrations. The reactor scrammed and propulsion was lost. Electrical problems spread as cables burned through, and control of the boat was threatened. An emergency ballast tank blow was performed and the submarine surfaced eleven minutes after the fire began. Distress calls were made, and most of the crew abandoned ship.

The fire continued to burn, fed by the compressed air system. Several hours after the boat surfaced, it sank again in 1,680 metres (5,510 ft) of water. The commanding officer and four others who were still on board entered the escape capsule and ejected it. Only one of the five to reach the surface survived.

Rescue aircraft arrived quickly and dropped small rafts, but many men had already died from hypothermia in the 2 °C (36 °F) water of the Barents Sea. The floating fish factory B-64/10 Aleksey Khlobystov (Алексей Хлобыстов) arrived 81 minutes after K-278 sank, and took aboard 25 survivors and 5 fatalities. In total, 42 men died in the accident.

Environmental threat

In addition to her eight standard torpedoes K-278 was carrying two torpedoes armed with nuclear warheads. The site of the accident is one of the richest fishing areas in the world, and the possible leakage of plutonium from the torpedoes' warheads or enriched uranium and fission products from the reactor could destroy the local fisheries for up to 700 years, costing billions of dollars annually. Under pressure from Norway, the Soviet Union used deep sea submersibles operated from the oceanographic rescue ship Akademik Mstislav Keldysh to search for K-278. In June 1989, two months after the sinking, the wreck was located. Soviet officials stated at the time that any possible leaks were "insignificant" and no threat to the environment. However Russian officials now say in 2009 that there could be a threat.

Examination of the wreck in May 1992 revealed cracks along the entire length of the titanium hull, some of which were of 30-40 centimetres (12-16 inches) wide, as well as possible breaches in the reactor coolant pipes. An oceanographic survey of the area in August 1993 survey did suggest that waters at the site were not mixing vertically, and thus the sea life in the area was not being rapidly contaminated. However, that survey also revealed a hole over six metres (20 feet) wide in the forward torpedo compartment.

An expedition during the summer of 1994 revealed some plutonium leakage from one of the two nuclear torpedoes. That expedition was successful in sealing some of the holes in the submarine's hull. On 24 June 1995 yet another mission set out to seal the hull fractures, and declared success at the end of July 1996. The Russian government has declared the risk of radioactive contamination of the environment negligible until 2015 or 2025.

In 1993, Vice Admiral (ret.) Chernov, commander of the submarine group of which the Komsomolets was part, founded the Komsomolets Nuclear Submarine Memorial Society, a charity to support the widows and orphans of his former command. Since then, the Society's charter has expanded to provide assistance to the families of all Soviet and Russian submariners lost at sea. Also, the 7th of April has become a day of commemoration for all submariners lost at sea.

See also

• List of sunken nuclear submarines

References

• Project 685 (Plavnik) - Mike Class
• GlobalSecurity article
• Federation of American Scientists
• Энциклопедия кораблей
• Книга памяти - K-278
• The Sunken Nuclear Submarine Komsomolets and its effects on the Environment (by Steinar Høibråten, Per E. Thoresen and Are Haugan. Published by Elsevier Science. 1997)
• Wallace, Wendy, "Komsomolets: A Disaster Waiting to Happen?", CIS Environmental Watch, Spring 1992.
• Montgomery, George, "The Komsomolets Disaster", Studies in Intelligence, Vol. 38, No. 5 (1995)
• Romanov, D. A., Fire at Sea: The Tragedy of the Soviet Submarine Komsomolets. Edited by K. J. Moore. Washington, DC: Potomac Books, Inc., 2006.
• Gary Weir and Walter Boyne, Rising Tide: The untold story of the Russian submarines that fought the Cold War, New York, NY: Basic Books,(2003)

External links

• TED Case Studies: Komsomolets Submarine and Radiation Leakage