The 182 meter long, 65125 dwt tanker Stena Primorsk went aground on the Hudson River near Stuyvesant, New York.  The vessel departed from Albany with a cargo of light crude when it went aground.   The vessel was able to refloat itself a short time later and proceeded to an anchorage off Stuyvesant.   The Coast Guard was notified of the grounding.   No reports of injuries, damage or pollution released.