ice in abandoned submarine bunker

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There were two more galleries of images, and I agree- I don’t think the base was nuclear powered.

Subs do generate quite a bit of waste heat, and using the [heat signature](https://en.wikipedia.org/wiki/Anti-submarine_warfare) of an “active” sub is possible:

>In modern times forward looking infrared (FLIR) detectors have been used to track the large plumes of heat that fast nuclear-powered submarines leave while rising to the surface.

In [this old Straight Dope](http://boards.straightdope.com/sdmb/archive/index.php/t-586074.html) thread, some back-of-the-envelope calculations are that:

>An Ohio class submarine is 170 meters long and 13 meters in diameter. Calling it a cylinder, which it’s not, it would have 7,200 square meters of surface area. Is it double hulled? Beats me, but assume it’s not. The heat transfer coefficient of steel is 25 W/m^2*K. If the sea water were 4 deg C and the inside 25 deg C that’s a delta of 21 K, so figure heat lost to the sea as being 3.8 MW.

>It’s got two 45 MW turbines. According to Wiki, marine steam cycle turbines have yet to break the 50% barrier in efficiency, so half of the 90 MW is wasted, most likely as heat. Some noise of course, but the Ohio class is pretty quiet.

>So, heat loss through the shell to the sea by conduction, 3.8 MW. Heat wasted by the turbines, 45 MW. I’m calling it exothermic. I made a lot of assumptions, and my math is sloppy but maybe my mistakes will cancel out.

>There’s going to be some big ass heat exchangers on board to get rid of the extra heat.

But I don’t know as that’d be enough- even when running at full power- to generate enough heat. That tunnel is 19 meters wide and several hundred meters long, with a meter of ice.

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