article_snippet.sent: The 500ft-long Oryol was in dock at Zvezdochka shipyard in Severodvinsk, 620 miles north of Moscow, on the White Sea.
article_snippet.sent: Preparation for filling the dry dock with water is underway,' said spokesman Ilya Zhitomirsky. '
article_snippet.sent: A submarine undergoes repairs at Zvezdochka shipyard in Severodvinsk in 2012.
article_snippet.sent: A nuclear submarine Remote location: The submarine was being repaired in a shipyard in Severodvinsk, around 1,000 kilometers (620 miles) north of Moscow on the White Sea .