Leading international classification society Bureau Veritas is to class the
series of innovative Arctic-capable LNG carriers which will be built in Korea’s
DSME yard to service the Yamal LNG project in Russia’s high Arctic.
Exporting LNG from Yamal calls for a type of LNG carrier never built
before. A series of fifteen vessels will be built, each capable of transporting
172,000 cu m of LNG and operating in second year ice up to 2.5 m thick. YAMAL LNG has awarded Sovcomflot, MOL, Teekay and
Dynagas one, three, six and five vessels respectively.
They will be built to dual Bureau
Veritas/Russian Register class.
Philippe Donche-Gay, Executive Vice President and head of BV’s Marine and
Offshore Division says, “We have made extensive investments in research into
ice loads and navigation in ice, working with major Russian institutions and
Asian shipyards. This effort, coupled with our world-leading expertise in large
LNG carriers gives us a strong technical base to class these highly
The 300 m loa vessels will
carry 172,000 cu m LNG in four membrane tanks. The tank membranes will be of
the GTT NO 96 type. The hull form is designed with a moderate ice bow forward
and a heavy ice-breaking profile aft. The ship is dual-acting, navigating in
light ice or open sea bow first, then navigating astern to break heavy ice. The
astern ice breaking mode is assisted by the unique podded propulsion system
which consists of three pods delivering around 45MW of power. Separate engine rooms
housing the diesel generator power plants will be encased in a double hull to
give protection from the ice and a high level of redundancy.
The ships will be built
to Russian Register Arc7 standard,
equivalent to an intermediate level
between Polar Class 3 and Polar Class 4 of Bureau Veritas rules, for year-round
operation in second-year ice with old ice inclusions with ice thickness of 2.5
m. The vessels will be highly winterised with Bureau Veritas winterization
notation COLD (-45,-52) which
means that the hull is prepared for operation in -45 Celsius ambient
temperature and the equipment should be able to work at -52 Celsius.
Safety of the vessels and care for the environment will be enhanced by a
forward and aft ice belt to add strength to the hull in key areas and a very
detailed fatigue life analysis to ensure the structure can with withstand the
expected extreme stresses for the life of the vessel. Bureau Veritas’ IceSTAR
tool is being used to assess the hull ice loads.
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Labels: arctic, classification society, ice-breaking, lng, Yamal