Shell sells Rhode Island power plant to Constellation Energy for $715 million, acquires Hunlock Creek ↧ ↧ Shell sells Rhode Island power plant to Constellation Energy for $7... Shell's North American unit said on Thursday it has agreed to sell its interests in ​a gas-fired power plant complex in Rhode Island to ‌Constellation Energy for $715 million, while also expanding into the lucrative U.S. Mid-Atlantic power market.