By Balazs Koranyi OSLO, Feb 15 (Reuters) - Norwegian public television plans to broadcast a burning fireplace for 12 straight hours from Friday evening, with firewood specialists providing colour commentary, expert advice and a bit of cultural tutoring. "We'll talk about the very nerdy subjects like burning, slicing and stacking the wood, but we'll also have cultural segments with music and poems," Rune Moeklebust, a producer for state broadcaster NRK. "It will be very slow but noble television."