It can take it decently well. You have to watch out for the burn though.I know that you can run earth power on Kyurem-b, but can it tank a lava plume or fire blast?
4 SpA Heatran Lava Plume vs. 0 HP / 0- SpD Kyurem-B: 132-156 (33.7 - 39.8%) -- 24.1% chance to 3HKO after Leftovers recovery
252 SpA Heatran Lava Plume vs. 0 HP / 0- SpD Kyurem-B: 160-189 (40.9 - 48.3%) -- guaranteed 3HKO after Leftovers recovery
252 SpA Heatran Fire Blast vs. 0 HP / 0- SpD Kyurem-B: 219-258 (56 - 65.9%) -- guaranteed 2HKO after Leftovers recovery
252 SpA Choice Specs Heatran Fire Blast vs. 0 HP / 0- SpD Kyurem-B: 328-387 (83.8 - 98.9%) -- guaranteed 2HKO after Leftovers recovery
252 SpA Heatran Lava Plume vs. 0 HP / 0- SpD Kyurem-B: 160-189 (40.9 - 48.3%) -- guaranteed 3HKO after Leftovers recovery
252 SpA Heatran Fire Blast vs. 0 HP / 0- SpD Kyurem-B: 219-258 (56 - 65.9%) -- guaranteed 2HKO after Leftovers recovery
252 SpA Choice Specs Heatran Fire Blast vs. 0 HP / 0- SpD Kyurem-B: 328-387 (83.8 - 98.9%) -- guaranteed 2HKO after Leftovers recovery
If you're bothered about the damage, you can always run HP EV's and change the nature.