TOKYO, Dec 19 (Reuters) - Japan's Tokyo Electric Power Co (Tepco):
* Says Canadian uranium producer Cameco is seeking $681.9 million in damages during an arbitration procedure after Tepco had scrapped its uranium supply contract with the Canadian firm in January
* Cameco, which filed for an arbitration in May on the matter, presented the damages amount in a document, Tepco says
* Says it sees no impact from the arbitration to its earnings at the moment (Reporting by Osamu Tsukimori; Editing by Gopakumar Warrier)