SALT LAKE CITY, UT--(Marketwired - Apr 26, 2013) - EnergySolutions, Inc. (NYSE: ES), a leader in nuclear commercial services, today announced that stockholders approved the previously announced merger agreement with affiliates of Energy Capital Partners II, LLC ("Energy Capital Partners" or "ECP"). Upon the closing of the merger, stockholders of EnergySolutions will be entitled to receive $4.15 per share in cash.