:(
RIP

Since I can't read russian, I don't have the latest news on that, but from my perspective it seems that the automatic firefighting system was triggered in one compartment, either by accident or maybe by oversensitivity.
Since the sub was kind of overcrowded with shipyard personell, maybe there were not enough rebreathers for all in the compartment, so those who got one survived and most of those who didn't died.
Maybe the compartment would have around a dozen people with a standard crew and now it had twice as many.
Since there were injuries, it seems they opened the compartment pretty fast.

I was pretty sick of reading the usual "drunken incompetent russians" comments on german news (not naval) forums :(

Well, the medical staff have confirmed that the cause of death for those killed was Freon poisoning. The casualties include 17 civilians and 3 navy crewmen killed, and 21 injured.

Apparently the submarine was submerged when the incident took place and the compartment bulkheads were locked, which both contained the incident, but also made it impossible to escape.

Interestingly, all of the crew, both military and civilian, are supposed to carry a portable oxygen bottle for breathing in these instances, at all times. Obviously the alarm is also supposed to go off to let them know to use the oxygen. The speculation now is that either they were not carrying their breathers, which would be a gross violation of safety, or that perhaps the alarm did not go off and they didn't know about the gas until it was too late.

Your alarm theory could well be right when you consider the article states:

However:

6 Sept 2006: Two die after fire in Viktor-III class Daniil Moskovsky
28 Aug 2003: Nine die after decommissioned November class K-159 sinks
12 Aug 2000: 118 die in sinking of Oscar-II class Kursk
7 Apr 1989: 42 die after fire in Soviet-era Komsomolets


Is not a very impressive safety record :nope:

Well, mind you, the first (and worst) of those two took place at a very different time for Russia, especially economically. Putin & co. have been pushing for the idea of a resurgent Russia where things like that don't happen - alas it's often a ruse. Military prestige is a big idea, but often doesn't match up to reality. Just like the fact that, for all the muscle flexing, independent observers report Russians using woefully obsolete equipment in the Georgia conflict, perhaps because the high-tech stuff wasn't running for lack of funding as usual. Russians are also notorious for having a lot of teething troubles with their equipment even after it enters service (the BMP-3, for instance, was notoriously hated in Chechnya because for all its high-tech features, it was basically rushed into combat in a non-working condition, and its ballistics computer and stabilizing system were broken).

That said, something like this could probably happen on any sub, unfortunately. Especially in a testing period like this.

From the casualty numbers, I would venture to guess two compartments were involved, not one. 41 people is 1/5th of all aboard - I doubt that many would've been in one of the forward compartments at one time, especially since it's speculated that the incident started in the torpedo room.

BBC posted a graphic;

http://news.bbc.co.uk/2/hi/europe/7718604.stm

http://newsimg.bbc.co.uk/media/image...kula_2_466.gif
1. Fire extinguishers switched on in front of submarine for unknown reasons
2. Affected area may have been sealed off, trapping personnel inside
3. Freon gas released by fire extinguishing system to remove oxygen
4. Twenty people die and 21 are injured - reportedly poisoned

The authorities say the submarine's nuclear reactor is not affected, the injured are sent for treatment and the vessel returns to port

Me too...last night before i go to sleep i so one more time the K-19...
What a tragedy another acident in sea tests i will light a candle for the crew and families! :cry:

http://www.euronews.net/en/article/0...eaves-20-dead/

Some of the scuttlebutt we used to hear in the navy was that the navy went out on a limb in a humanitarian effort to help the Soviets with reactor safety issues during the cold war. I do not how factual this is but that was the buzz back then.

Twenty die on Russian boat
 

At least 20 people died Saturday when a fire safety system malfunctioned on a Russian submarine (Akula class). freon gas, used to stop fires, killed twenty one persons on board. The boat returned to base on it's own power.

wild bill

Foolish design
 

Freon is bad stuff it displaces Oxygen in your lungs and you are a dead man - you can not purge your lungs from it - that is one foolish design - we freak when we have a minor leak from one of our systems.

that was the Akula II that Russia was lending to India, right?

Already has been posted here:
http://www.subsim.com/radioroom/showthread.php?t=144168

also it got more information about the incident :yep:

HunterICX

As I posted somewhere else there is much safer extinguishing agents available.

Freon was commonly used as a referigerant in air conditioning systems. Its use was banned in the US when fears of it depleting the ozone layer were expressed. Freon was never used as an extinguishing agent to my knowledge. In fact I believe the article may have misspoke mistaking Freon for Halon.

A more common agent was Halon, its use has also been banned for 'new' installations. It was in common use for computer rooms where the use of water would be catastrophic. However it had real safety issues as you can see from this accident.

As I said its use is now banned and it is to be removed from any existing installations if you spend 10 cents on remodeling. The alternatives while safer are more expensive.

Here is a lengthy article on the subject http://www.halcyon.com/NAFED/HTML/Halonalt.html

Actually, it is probably Freon according to Romanov (Fire at Sea). They apparently bought the stuff from Japan, and they presumably used the stock (yeah, if you are the Russian Navy, you would be spending your very finite rubles on more expensive fire-fighting gas...)

Poor guys. People who served in our navy say that most accidents usually happen on the test runs before a vessel comes into comission. Especially on subs - because even in normal situation a lot depends on discipline and skills of crew, but when unfit ship in sea is overcrowded with civilian personnel who doesn't have much notion of sea ways and sub service - beware for the trouble...
As for Freon - our industry doesen't produce it since they've signed an agreement for Environment Care - but there is a lot of it in stock and an agreement doesn't forbid to use previously produced Freon. And as Nerpa is of the old design - probably they've decided not to change the project and to use the system with the stocked gas.
Sad anyway...

Inquiry panel rules accident cause as human error
 

In this article today:

Didn't take long to lay the blame.