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    Icebreakers

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    Arrow

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    Icebreakers - Page 17 Empty Re: Icebreakers

    Post  Arrow Fri Jul 09, 2021 12:08 pm

    The icebreaker Leader is an amazing design. The buoyancy matches the largest aircraft carriers. Ice breaks with a thickness of 4.5 m.
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    Post  Hole Fri Jul 09, 2021 12:45 pm

    It´s not only the thickness, but the speed. It can break 2m of ice with 15+ knots. With current icebreakers most freighters/tankers have to slow down to 4 - 5 knots, but with Leader they can travel with their normal speed.

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    ALAMO

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    Post  ALAMO Fri Jul 09, 2021 12:47 pm

    ... and that makes it capable to assist the convoy directly, not to break the ice in advance. This is a typical sea route speed.
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    Arrow

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    Post  Arrow Sun Jul 11, 2021 10:12 am

    The northern sea route, thanks to icebreakers, climate warming, in addition to a significant trade route, will enable the free movement of the Russian fleet between the Atlantic and the Pacific Ocean. They do not have to sail around the world through hostile waters.
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    ALAMO

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    Post  ALAMO Sun Jul 11, 2021 10:23 am

    It does indeed, that is why I expect some kind of big naval base on the Kara Sea quite soon. It is a very good location, covering the big infrastructure projects on Yamal.

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    Post  PapaDragon Sat Jul 24, 2021 12:19 am


    Rosatom plans to order 6 new icebreakers (2 nuclear Arktika-class and 4 gas powered)

    https://www.rbc.ru/business/23/07/2021/60fab0c49a7947c410dcff87?from=from_main_5


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    Arrow

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    Post  Arrow Sat Jul 24, 2021 8:30 am

    So two more Arctic to the planned 5 now? This makes for a total of 7 Arktika icebreakers plus 3 Leaders and 4 gas icebreakers. Wow impressive
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    ALAMO

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    Post  ALAMO Sat Jul 24, 2021 10:41 am

    еще шесть ледоколов, so yes, six more Laughing
    But let's focus again on the scale.
    Sure, the atomic ones are to replace aging Таймыр, Вайгач and Ямал, all of them will be gone late 20s.
    But the 4 gas-powered are extending the capabilities.
    You don't spend such a mountain of cash if it is not needed.
    If the biggest icebreakers on the planet are not enough to secure the needs, it means that those needs are hiking as crazy.
    And 60 bln RUB for an atomic icebreaker? That shit would cost $10 bln when building in Murica Laughing Laughing

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    Post  JohninMK Fri Jul 30, 2021 11:46 am

    Need so many they can't build them all.

    Sea and Coast
    @seaandcoast1
    ·
    29 Jul
    Turkey’s Sefine Shipyard became the only bidder for tender held in Russia to build an 18 MW icebreaker, 7 class ship according to the Russian classification system for the Northern Sea Route in the Artic. Sefine Shipyard will undertake the construction for some $180.3 million
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    ALAMO

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    Post  ALAMO Fri Jul 30, 2021 12:09 pm

    18MW is a small icebreaker, usually suited for operating in warmer, still freezing seas like the Baltic or Okhotsk. Or in the summer period in the Arctic.
    Mostly it used to be Rosmorport order, and this is a federal agency responsible for smooth port operations.
    I guess it is proj. 21900 derivative.
    Russians usually outsource their production.
    Last time, they placed it to Germany's shipyard Sietas in Hamburg, but it is owned by Pella anyway.
    Back there, it used to be constructed at Arctech in Helsinki.
    Wonder why they are switching the contractor there scratch
    The price is quite shocking, the last tender for this class was budgeted below $100mln.
    The other thing I find amazing, they are ordering this class on yearly basis, but with different contractors dunno
    Still, "a small icebreaker" stands behind a 120m long hulk with 15kt displacement Laughing
    By the way, we face more and more collaboration with Turkey ...
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    Post  Russian_Patriot_ Wed Aug 18, 2021 7:48 pm

    New nuclear-powered icebreaker Arktika under repair in Kronstadt. 

    As reported by the web resource Mediapaluba, the lead new nuclear icebreaker Arktika of Project 22220 (LK-60YA), entered the Veleshchinsky dry dock of Kronshtadt Marine Plant JSC on August 12, 2021. The ship will have to replace the propeller motor on the starboard shaft, which failed during the commissioning of the electric propulsion system.

    On July 9, the icebreaker Arktika returned to St. Petersburg from Murmansk for repairs. The ship docked at the Baltic Shipyard. On August 12, the ship left the enterprise and headed for Kronstadt.

    Earlier, Vyacheslav Ruksha, Deputy head of Rosatom and head of the Northern Sea Route Directorate, said in an interview with Kommersant:

    "If we talk about the dismantling of the right rowing electric motor (GED, got a short circuit during commissioning), what is the reason for the "Arctic"? If the icebreaker arrives in St. Petersburg on August 10-12, it will dock at the Kronstadt Marine Plant. Preparatory work is done. The transformer, which also suddenly failed, has already been changed. Another problem is an insufficient system for removing oil vapor from the turbine, which affects the operation of RITM-200 units. The work on the turbines has also been done."

    bmpd recalls that the lead nuclear icebreaker Arktika was built at Baltiysky Zavod JSC (part of United Shipbuilding Corporation JSC) The new project 22220 (LK-60YA) received damage to the right propeller motor as a result of an accident on February 4, 2020 during mooring tests. As a result of subsequent surveys and trials, it was decidedthat the icebreaker would resume testing and be delivered with an emergency electric motor with power restrictions "under certain guarantees and obligations". The acceptance certificate of the Arctic icebreaker was signed October 21, 2020 in Murmansk, after which the icebreaker with reduced full capacity took part in the winter navigation of 2020/2021 in the North. Replacement of the emergency electric motor on the icebreaker was planned to be carried out during the docking in Kronstadt in August 2021, which is now being implemented.

    Source: 
    Icebreakers - Page 17 91151410

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    Post  kvs Wed Aug 18, 2021 8:05 pm

    I suspect that it is more than just fixing the motor. They are probably going to do a detailed inspection of the hull and other parts.

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    Post  GarryB Thu Aug 19, 2021 7:17 am

    Plus checking out the entire propulsion system perhaps... it would not surprise me if they went for something similar on the new 40K ton helicopter landing ships as they are a similar weight, though they might add other backup generators too for all the extra stuff a landing ship needs to power...
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    Post  PapaDragon Thu Aug 19, 2021 5:01 pm

    kvs wrote:I suspect that it is more than just fixing the motor.   They are probably going to do a detailed inspection of the hull and other parts.

    Well obviously

    They already have it in dry dock so might as well go over other stuff while it's there

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    Post  owais.usmani Tue Sep 14, 2021 3:37 pm

    https://portnews.ru/news/318486/

    The lead universal nuclear-powered icebreaker of project 22220 "Arktika", after undergoing dock repairs, performed an interfactory transition from Kronstadt to the Baltic Shipyard . This was reported by the press service of the shipyard.

    As previously reported, the ship was docked at the Kronstadt Marine Plant (KMOLZ) to carry out scheduled work to replace the propulsion electric motor (GED).

    During the month that the ship stayed at the KMOLZ dock, the specialists of the Baltic Shipyard cut out a part of the outer skin of the icebreaker's hull and performed a set of operations to replace the propeller electric motor.

    In addition, a number of minor works were carried out, including work on the revision of the rudder complex, bottom-side fittings and painting of the ship's hull.

    The dock named after Veleshinsky, accompanied by 5 tugs, left the icebreaker on 12 September. Due to unfavorable weather conditions, the exit from the dock and the passage from Kronstadt to St. Petersburg took about 9 hours. At midnight, the ship was moored at the berth of the Baltic Shipyard and shore power was taken on board and a fire system was connected.

    In the coming days, the specialists of the enterprise will begin work on the final installation of the GED, its alignment and adjustment of the systems. In mid-October, the plant is to start testing the starboard engine.

    The universal nuclear icebreaker "Arktika" is the lead ship of Project 22220, built at the Baltic Shipyard. Laid down in November 2013, launched on June 16, 2016, commissioned on October 21, 2020.

    The universal nuclear-powered icebreakers of Project 22220 are the largest and most powerful icebreaking ships in the world. Their main task is to ensure year-round navigation in the Western region of the Arctic. The vessel is able to overcome ice obstacles up to 3 meters thick. Now, at the production facilities of the Baltic Shipyard, four more vessels of the project 22220 line are being built, these are the icebreakers Sibir, Ural, Yakutia and Chukotka. The ships of this project in the coming years should become the basis of the civilian icebreaker fleet of Russia.

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    Hole
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    Post  Hole Tue Sep 14, 2021 9:56 pm

    Icebreakers - Page 17 029510

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    ALAMO

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    Post  ALAMO Wed Sep 15, 2021 6:50 am

    Remind me, how many ships, equal in price & complexity to a supercarrier, do they build simultaneously?*
    Laughing
    *yes, I know, just asking for fun Laughing Laughing

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    Post  Hole Thu Sep 16, 2021 12:29 pm

    Icebreakers - Page 17 29226510
    Pic is from May

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    PapaDragon
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    Post  PapaDragon Wed Sep 22, 2021 8:34 pm


    Engine replacement on Arktika icebreaker:

    Icebreakers - Page 17 22-10057797-fb-img-1632296773430

    Icebreakers - Page 17 22-10057781-fb-img-1632296789044

    Icebreakers - Page 17 22-10057797-fb-img-1632296777459

    Icebreakers - Page 17 IMG_6727

    Icebreakers - Page 17 IMG_7400

    Icebreakers - Page 17 IMG_7125



    Bonus pic of all three:

    Icebreakers - Page 17 22-10058121-369959


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    GarryB
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    Post  GarryB Thu Sep 23, 2021 8:11 am

    Impressive... pop the side panel out and slide it aside and extend some rails out and presumably slide the old unit out and lift it up and out of the dry dock and then drop in the replacement and slide it in and pop the side panel back into place...
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    Post  kvs Thu Sep 23, 2021 4:50 pm

    GarryB wrote:Impressive... pop the side panel out and slide it aside and extend some rails out and presumably slide the old unit out and lift it up and out of the dry dock and then drop in the replacement and slide it in and pop the side panel back into place...

    But it still needs welding. I suppose they accounted for this since doing it too often will require the plates to be replaced.

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    ALAMO

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    Post  ALAMO Thu Sep 23, 2021 5:54 pm

    Not really.
    A good quality weld can be stronger than solid steel.
    Cracks will appear next to it if you apply the destructive force.
    As it is a standard procedure to x-ray all the welds on production in QC check, all the welds are OK.

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    Arrow

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    Post  Arrow Sun Sep 26, 2021 11:09 am

    Some interesting shots of the Arktica reactor.

    https://youtu.be/oeS-xtbRHkM

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    owais.usmani

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    Post  owais.usmani Tue Sep 28, 2021 10:50 am



    One of six electric motors was replaced on the nuclear-powered icebreaker "Arktika". Now the giant develops 81,500 hp. and will return to work at the end of the year!

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    Post  kvs Tue Oct 05, 2021 8:46 pm



    Look at the nuclear reactor on the Arctica in dry dock.

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