EX-21.1 Subsidiary List

The following table sets forth all subsidiaries of the Company, other than subsidiaries that, when considered in the aggregate, would not constitute a significant subsidiary, including the percentage of issued and outstanding voting securities beneficially owned by the Company:

EnergySolutions, LLC, a Utah limited liability company 100.00%

BNG America LLC, a Delaware limited liability company 100.00%

EnergySolutions, Spent Fuel Division, Inc., a Delaware corporation 100.00%

Manufacturing Sciences Corporation, a Colorado corporation 100.00%

EnergySolution Company, Inc., a Delaware corporation 100.00%

EnergySolutions Diversified Services, Inc., a Delaware corporation 100.00%

Weskem LLC, a Delaware limited liability company 27.60%

EnergySolutions EU Limited, a company incorporated in England and Wales 100.00%

EnergySolutions EU Services Limited, a company incorporated in England and Wales 100.00%

Magnox Limited, a company incorporated in England and Wales 100.00%

Magnox Electric Group Pension Trustee Company Limited, a company

EnergySolutions Federal EPC, Inc., a Delaware corporation 100.00%

EnergySolutions Government Group, Inc., a Delaware corporation 100.00%

EnergySolutions Federal Services of Hanford, Inc., a Delaware corporation 100.00%

EnergySolutions Oak Ridge, LLC, a Delaware limited liability company 100.00%

EnergySolutions Performance Strategies Inc., a Georgia corporation 100.00%

LATA/Parallax Portsmouth, LLC, a New Mexico limited liability company 49.00%

West Valley Environmental Services LLC, a Delaware limited liability company 10.00%

Global Threat Reduction Solutions, LLC, a Texas limited liability company 49.00%

Isotek Systems, LLC, a Tennessee limited liability company 100.00%

TPMC-EnergySolutions Environmental Services, LLC, a Texas limited liability

TPMC-EnergySolutions Environmental Services 2008, LLC, a Texas limited liability 49.00%

TPMC-EnergySolutions Environmental Services 2009, LLC, a Texas limited liability 49.00%

TPMC-EnergySolutions Environmental Services 2010, LLC, a Texas limited liability 49.00%

TPMC-EnergySolutions Environmental Services 2011, LLC, a Texas limited liability 49.00%

TPMC-EnergySolutions Environmental Services 2012, LLC, a Texas limited liability 49.00%

Uranium Disposition Services, LLC, a Tennessee limited liability company 26.00%

Washington River Protection Solutions LLC, a Delaware limited liability company 40.00%

EnergySolutions Services, Inc., a Tennessee corporation 100.00%

Chem-Nuclear Systems, L.L.C., a Delaware limited liability company 100.00%

EnergySolutions Canada Corporation, an Ontario corporation 100.00%

Hittman Transport Services, Inc., a Delaware corporation 100.00%

Vitritek Environmental, Inc., a Delaware corporation 50.00%

EnergySolutions Asia Limited, a Hong Kong holding company 100.00%

Semprasafe LLC, a Delaware limited liability company 100.00%

ZionSolutions, LLC, a Delaware limited liability company 100.00%

423 IT Holdings, LLC, a Utah limited liability company 100.00%