Business Confidential Proprietary Information Confidential information has been omitted in places marked ***** and has been filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to this omitted information.

Whereas effective as of November 14, 2014 TENEX’s full corporate name was changed from Joint Stock Company “Techsnabexport” to Joint Stock Company “TENEX”, all references in the Contract to Joint Stock Company “Techsnabexport” shall be considered references to Joint Stock Company “TENEX”.

Paragraph E1-6(b) of the Contract is hereby modified to read as follows:

Starting from (and including) CY2015, the Delivery Receipts identified in Appendix G1 of the Contract as forms G1-1 “Delivery Receipt Format for Delivery of Enriched Product in Product Cylinders” and G1-2 “Delivery Receipt Format for Delivery of Enriched Product” referred to in Section 5.02 and Paragraph E1-1(b) of the Contract, shall not be required to be executed, unless specifically agreed by the Parties regarding specific Physical Deliveries.

Section 1.18 of the Contract is hereby modified by inserting “*****” after the phrase “*****”. Further, Section 1.44 is hereby modified by inserting the following new subsection (g) after existing subsection (f):

with respect to Related Natural Uranium in ***** Cylinders ***** Delivered to TENEX under *****, these terms mean the delivery term agreed between TENEX and *****, for TENEX to take physical possession of such Related Natural Uranium in ***** Cylinders following Delivery by USEC.”

The introductory phrase of Section 7.02(c) is hereby modified by replacing the words “Section 7.02(a), Section 7.02(b) or Section 7.02(h)” with “Section 7.02(a), Section 7.02(b). Section 7.02(h) or Section 7.02(j)”.

In Section 7.02(f)(iii), the words “or Section 7.02(c)” are hereby replaced with “Section 7.02(c) or Section 7.02(j)”.

In Section 7.02(g), the words “and Section 7.02(c)” are hereby replaced with “Section 7.02(c) and Section 7.02(j)”in three places.

The following language shall be inserted at the end of Section 7.02:

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The terms applicable to Acceptance and rejection of Related Natural Uranium Delivered under this Section 7.02(j) can be found in Appendix E2. The terms applicable to acceptance and rejection of the ***** Cylinders, *****. The remedies applicable in the case of a Delivery of non-Conforming Related Natural Uranium under Section 7.02(j) can be found in Paragraph E2-6 and the remedies in the case of a failure to Deliver Related Natural Uranium under Section 7.02(j) can be found in Paragraph E2-5. Supplemental procedures for Natural Uranium Delivered under this Section 7.02(j), which shall constitute the procedures contemplated by Paragraph E2-1 in cases where Appendix E2 applies to Related Natural Uranium Delivered under Section 7.02(j), shall be agreed separately by the Parties, but in no event shall a delay in final agreement on such procedures preclude USEC from making a Delivery under Section 7.02(j). TENEX shall not take Physical Delivery of the filled ***** Cylinders until such procedures have been agreed or the Parties agree that they are not needed.”

Section 7.03(a)(ii) is hereby modified by replacing the words “or 7.02(c)” with “, 7.02(c) or 7.02(j)”.

The last sentence of Section 7.04 is hereby replaced with the following: “Title to, and risk of loss of, Related Natural Uranium Delivered under Section 7.02(h) and Section 7.02(j) shall be governed by those Sections.”

Section 7.09 is hereby modified by replacing the words “under Section 7.02(c) or Section 7.2(h)” with “under Section 7.02(c), Section 7.02(h) or Section 7.2(j).”

Section 7.10 is hereby modified by inserting the following new sentence at the end of Section 7.10: “The procedures for Acceptance of Related Natural Uranium Delivered under Section 7.02(j) are set forth in Appendix E2 and in any supplemental procedures agreed by the Parties pursuant to Paragraph E2-1.”

In Appendix B of the CONTRACT, references to Section 7.02(c) in item (iv) in Paragraph B-1(b) and items (h) and (j) in Paragraph B-2 shall be deemed to refer to the Delivery of Related Natural Uranium under either Section 7.02(c) or Section 7.02(j) as applicable. Where applicable, not later than thirty (30) days after the date this Amendment No. 005 to the CONTRACT takes effect, USEC shall update its most recent non-binding estimate and any pending Orders submitted prior to the date this Amendment No. 005 takes effect under which it plans to Deliver any Related Natural Uranium under Section 7.02(j).

In Appendix E2, references to Section 7.02(c) shall be deemed to refer to Related Natural Uranium Physically Delivered under Section 7.02(c) or Delivered under Section 7.02(j). In addition, with respect to Related Natural Uranium Delivered under Section 7.02(j), the ***** in Paragraph E2-2 shall commence from *****.

The words “or Section 7.02(c)” in Paragraph E2-3(a) are hereby replaced with “, Section 7.02(c) or Section 7.02(j)” and the words “under Section 7.02(c)” in Paragraph E2-3(b) are hereby replaced with “under Section 7.02(c) or Section 7.02(j)”.

The words “and Section 7.02(c)” in Paragraph E2-5(f) are hereby replaced with “, Section 7.02(c) or Section 7.02(j)”.

In Appendix H, references to Related Natural Uranium ***** in Paragraph H-9 shall be deemed to refer to Related Natural Uranium *****.

Appendix M of the Contract is hereby modified by adding the following *****

In Appendix N, *****

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