
Interesting 9 yo report on the mess of USSR rad control -
would be nice to see something remotely verifiable re the 2007 contamination situation, not merely in Russian controlled space - but in the ex-satellites, too. (There are plenty of off-limits inland sites.. only barely reported on, all these years later.)
But conflating their atrocious record of mindless contamination, from the very first - and whatever is the current situation re funding (local or donated) -- with -- "that's why the icebergs are melting" is pure Boxlish, and needs no fancy nukular calcs. at all.
Look up the specific heat of water, then sea water - estimate the cubic MILES of seawater near some (arbitrary radius-of) "dumped reactor site". Search for some indication of the max power output of a typ Soviet submarine reactor (also the odds of its melt-down under sinking conditions - while at it.) And if it Did "melt-down": the est. total energy release of that (far as I've heard) neva-hoppen-event.
Comparing that volume of sea water, the temp rise you put some number on -- and the Total Energy of either:
1) reactor humming along at full power automatically, way down there, or
2) Total Energy release from a er 'fast criticality'
-- is just arithmetic, not even algebra.
Best to do that before solving "silly warming cha cha cha" / or trying to lampoon that which you're too lazy to seriously investigate - first.
Not my job. Hint, though: raising the seawater temp "in that whole 'sea' area" even 1\ufffd - will need the use of [E] just like you have to do with your slide rule, to keep track of Gigawatts and such. Then note the 'shielding' characteristics of huge amounts of water, for various energies, particles.