The U. S. Dept. of Agriculture (USDA) advises, “Meat and poultry defrosted in the refrigerator may be refrozen before or after cooking. If thawed by other methods, cook before refreezing.” (Basics for Handling Food Safely, September 8, 2006).

(DO NOT thaw meat at room temperature, such as on the kitchen counter.)

Meat/poultry that is refrozen might suffer some quality loss as moisture may be lost during thawing.

Safety will depend on whether the raw product was handled properly before it was frozen, refrozen shortly after it was thawed, cooked to a safe temperature when it is eaten and handled safely if there are any leftovers.

so essentially if the power goes out, and it unfreezes, but you left it in the freezer, then it seems like its safe to refreeze it, so long as the power cut was not for too long - i.e. temperature in the freezer didn’t hit room temperature. Otherwise if it did, you can cook it, and then refreeze it - if the power comes back.

hope this helps a little…