1) BECHTEL NATIONAL, INC.

2) BIA-ENERGY OPERATING COMPANY LLC

3) EDISON CHOUEST OFFSHORE

4) ENBRIDGE (U.S.) INC. (FORMERLY SPECTRA ENERGY)

5) ENERGY TRANSFER PARTNERS

6) ENTERGY SERVICES LLC

7) FEDERATION OF ELECTRIC POWER COMPANIES OF JAPAN

8) ISO NEW ENGLAND

9) NEXTERA ENERGY INC

10) NUCLEAR ENERGY INSTITUTE

11) PINNACLE WEST CAPITAL CORPORATION

12) S&B FAMILY OF COMPANIES

13) TALEN ENERGY

14) VALERO ENERGY

15) X-ENERGY, LLC