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    Project 971: Akula class

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    GarryB
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    Re: Project 971: Akula class

    Post  GarryB on Tue Aug 26, 2014 6:58 am

    Over time pumps and motors get more noisy... but considering they are completely rebuilding these subs they will likely end up quieter and electronically more capable than they have ever been before... which would make them excellent boats for any Navy.


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    Re: Project 971: Akula class

    Post  Mike E on Wed Aug 27, 2014 12:25 am

    Exactly... Yes, they do get louder, but good maintenance and upgrades fix that.

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    Re: Project 971: Akula class

    Post  Mike E on Mon Sep 01, 2014 9:06 am

    I hate to ask, but don't the Akulas have a "silent mode" where reactor pumps are shut down and electric motors power it?

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    Re: Project 971: Akula class

    Post  Austin on Mon Sep 01, 2014 9:22 am

    Mike E wrote:I hate to ask, but don't the Akulas have a "silent mode" where reactor pumps are shut down and electric motors power it?

    Yes , The pump can be shut down and they use natural circulation of water for coolent.

    Akulas do have batteries with them and dont just rely on N power but its speed will be very low in few knots but very silent.

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    Re: Project 971: Akula class

    Post  Mike E on Mon Sep 01, 2014 9:33 am

    Thank you very much!

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    Re: Project 971: Akula class

    Post  navyfield on Tue Sep 02, 2014 8:51 pm

    Mike E wrote:I hate to ask, but don't the Akulas have a "silent mode" where reactor pumps are shut down and electric motors power it?
    that is emergency mode in case of reactor malfunction Laughing welcome

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    Re: Project 971: Akula class

    Post  GarryB on Wed Sep 03, 2014 4:39 am

    If you have a reactor malfunction the last thing you would do is turn off the pumps to the reactor cooling system.

    Perhaps what they should do is get some nice toxic nuclear waste and use the super quiet low speed operating mode to release toxic material into exclusive fishing areas used by European countries to contaminate their food supply...


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    Re: Project 971: Akula class

    Post  Mike E on Wed Sep 03, 2014 4:41 am

    navyfield wrote:
    Mike E wrote:I hate to ask, but don't the Akulas have a "silent mode" where reactor pumps are shut down and electric motors power it?
    that is emergency mode in case of reactor malfunction Laughing welcome
    I've heard both that and the opposite, which is true? Shutting down pumps isn't exactly a regular "reactor malfunction procedure".

     - Good idea GarryB!!! Secret poisoning, from the sea! Twisted Evil

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    Re: Project 971: Akula class

    Post  navyfield on Thu Sep 04, 2014 5:06 pm

    no, you actually slam the graphite bars into reactor and stop everything.

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    Re: Project 971: Akula class

    Post  Mike E on Thu Sep 04, 2014 8:36 pm

    Reactors don't just shut off, unless they are Thorium-based they will still need water/liquid cooling of some sort...

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    Re: Project 971: Akula class

    Post  GarryB on Fri Sep 05, 2014 12:35 pm

    Graphite bars inserted between the fuel rods absorbs the energetic particles creating the reaction that generates the heat, that stops the reactor... in other words it shuts down the reactor, but shutting off the cooling system would be catastrophic as the residual heat inside the reactor would be enough for a melt down even with the reactor shut down.

    The reactor at Fukushima was shut down, but power was lost to the cooling system which resulted in a melt down anyway...


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    Re: Project 971: Akula class

    Post  Mike E on Fri Sep 05, 2014 4:52 pm

    There is a difference between absorbing and stopping completely, but I do get your point.

    Fukushima was a mess even before the meltdown occurred! Thorium won't have any of those problems!

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    Re: Project 971: Akula class

    Post  navyfield on Sun Sep 07, 2014 11:44 am

    Mike E wrote:There is a difference between absorbing and stopping completely, but I do get your point.

    Fukushima was a mess even before the meltdown occurred! Thorium won't have any of those problems!
    actually failure of pump is calculated in , so there is enough thick graphyte bars in nuc. sub. reactor to shut it down permanently if needed (if sub is heavy damaged and going to crush depth and beyond).

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    Re: Project 971: Akula class

    Post  GarryB on Mon Sep 08, 2014 12:32 pm

    actually failure of pump is calculated in , so there is enough thick graphyte bars in nuc. sub. reactor to shut it down permanently if needed (if sub is heavy damaged and going to crush depth and beyond).

    Wish you had told the crew of the Yankee class SSBN whose crew members got a lethal dose of radiation having to go into the reactor compartment to shut down the reactor manually.

    I am sure they will be overjoyed to learn all sub reactors are exactly the same and all are totally safe... Rolling Eyes


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    Re: Project 971: Akula class

    Post  navyfield on Tue Sep 09, 2014 10:05 pm

    in those days nuc,. reactor 1st version were experimental designs. unlike today which are 3rd generation ,must i teach you everything... Laughing

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    Re: Project 971: Akula class

    Post  Mike E on Wed Sep 10, 2014 12:01 am

    navyfield wrote:in those days nuc,. reactor 1st version were experimental designs. unlike today which are 3rd generation ,must i teach you everything... Laughing
    They weren't "experimental"... - Yes, they weren't advanced, but that doesn't mean they were experimental. You don't teach anybody anything... lol!

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    Re: Project 971: Akula class

    Post  GarryB on Thu Sep 11, 2014 5:40 am

    Rolling Eyes So all nuclear power plants used by all countries in submarines are the same?

    I used to think you liked to play dumb... beginning to think you are not playing...


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    Re: Project 971: Akula class

    Post  Mike E on Thu Sep 11, 2014 9:21 pm

    GarryB wrote:Rolling Eyes  So all nuclear power plants used by all countries in submarines are the same?

    I used to think you liked to play dumb... beginning to think you are not playing...
    Oh, he isn't "playing"!

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    Re: Project 971: Akula class

    Post  George1 on Sun Sep 14, 2014 4:04 am

    K-391 Bratsk and K-295 Samara going to modernization




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    Re: Project 971: Akula class

    Post  Mike E on Sun Sep 14, 2014 5:56 am

    Good... Does anybody know how long the modernization process will take?

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    Re: Project 971: Akula class

    Post  Stealthflanker on Sun Sep 14, 2014 9:16 am

    Mike E wrote:Good... Does anybody know how long the modernization process will take?

    Years, as this may involve opening the pressure hull, refuel the reactor and balancing machineries.

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    Re: Project 971: Akula class

    Post  Mike E on Sun Sep 14, 2014 7:01 pm

    Stealthflanker wrote:
    Mike E wrote:Good... Does anybody know how long the modernization process will take?

    Years, as this may involve opening the pressure hull, refuel the reactor and balancing machineries.
    Figured... It will be worth it in the long run though!

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    Re: Project 971: Akula class

    Post  Stealthflanker on Mon Sep 15, 2014 5:17 am

    Mike E wrote:
    Figured... It will be worth it in the long run though!

    Let's wish for stable economy during those overhaul years.

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    Re: Project 971: Akula class

    Post  Mike E on Mon Sep 15, 2014 5:30 am

    Stealthflanker wrote:
    Mike E wrote:
    Figured... It will be worth it in the long run though!

    Let's wish for stable economy during those overhaul years.
    Yeah, it *should* strengthen in the long term...

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    Re: Project 971: Akula class

    Post  navyfield on Sun Sep 21, 2014 8:54 pm

    GarryB wrote:Rolling Eyes  So all nuclear power plants used by all countries in submarines are the same?

    I used to think you liked to play dumb... beginning to think you are not playing...
    today very simmilar...
    i beat you so no need to make a fuss....

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