Russia's developing 100 megaton dirty Tsunami Creating submarine drone bomb

[Oberon]

Originally Posted by ikalugin

Don't you plan to retire the V-class boats?


This is a miniature nuclear powered submarine after all, with only 4-6 carried per mothersub. The UUV is sufficiently larget to carry a number payloads - for example torpedoes (it can carry full size heavyweight ones) or the 100mt class physics package. The physics package is salted and is desighned to deny large coastal areas to an adversary for extended periods of time via fallout.
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Well, first you'd need to be sure that it would work properly, look at the Tsar Bomba, tamped down to 50mt and most of the energy went into space. As to fallout, you're probably not going to take out as much as you would with a conventional air or ground burst, because underwater explosions produce a much smaller cloud, see:
http://www.abomb1.org/nukeffct/enw77b2.html

Then you've got the real possibility that what you dump into the sea is going to wash back onto the shores of Vladivostok before it's stopped being radioactive. Of course, in that scenario Vladivostok would be a glass parking lot by then so it wouldn't really matter.