Document:

First Amendment to Credit Agreement, dated as of June 19, 2007

 Exhibit 10.6 
 AMENDMENT NO. 1, dated as of June 19, 2006 (this “Amendment”), to the Credit Agreement, dated as of June 7, 2006 (as amended, restated, amended and restated, supplemented or otherwise
modified from time to time, the “Credit Agreement”; capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Credit Agreement), by and among Dragon Merger Corporation
(before the Merger, “Duratek”), Duratek, Inc. (after the Merger, “Duratek”), CITICORP NORTH AMERICA, INC., as administrative agent (in such capacity, the “Administrative Agent”) and the other Agents
and Lenders from time to time signatory thereto. 
 WHEREAS, the parties to the Credit Agreement wish to amend the Credit Agreement on the
terms and conditions set forth herein; 
 NOW, THEREFORE, in consideration of the premises and covenants contained herein and for other good
and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound hereby, agree that the Credit Agreement shall be amended as set forth in Annex I hereto and as so
amended is hereby ratified, approved and confirmed in each and every respect. 
 Duratek represents and warrants to the Lenders as of the
date hereof that: 
 (a) The execution and delivery of this Amendment by Duratek has been duly authorized. 
 (b) Neither the execution or delivery by Duratek of this Amendment, nor compliance by it with the terms and provisions hereof will,
(i) violate any Applicable Law respecting Holdco, EnergySolutions, Parent or their Subsidiaries or (ii) conflict with, result in a breach of or constitute a default under the certificate or articles of incorporation or by-laws, operating
agreement or the partnership agreement, as the case may be, as such documents are amended, of Holdco, of EnergySolutions, of Parent or of any of their Subsidiaries, or under any material indenture, agreement, or other instrument, to which Holdco,
EnergySolutions, Parent or any of their Subsidiaries is a party or by which any of them or their respective properties may be bound. 
 (c) Before and after giving effect to this Amendment, the representations and warranties set forth in the Credit Agreement are true and correct in all material respects with the same effect as if made on the date hereof, except to the
extent such representations and warranties expressly relate to an earlier date in which case they shall be true and correct in all material respects as of such earlier date. 
 (d) At the time of and after giving effect to this Amendment, no Default or Event of Default has occurred and is continuing. 

 -2- 
  

 This Amendment may be executed in any number of counterparts and by different parties hereto on separate
counterparts, each of which when so executed and delivered shall be deemed to be an original, but all of which when taken together shall constitute a single instrument. Delivery of an executed counterpart of a signature page of this Amendment by
facsimile transmission shall be effective as delivery of a manually executed counterpart. 
 This Amendment shall become effective on the
date on the Administrative Agent (or its counsel) shall have received from Lenders constituting the Majority Lenders and each of the other parties hereto either (i) a counterpart of this Amendment signed on behalf of such party or
(ii) written evidence satisfactory to the Administrative Agent (which may include telecopy transmission of a signed signature page of this Amendment) that such party has signed a counterpart of this Amendment. 
 THIS AGREEMENT SHALL BE GOVERNED BY, CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 
 [SIGNATURE PAGES FOLLOW] 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the date
first above written. 
  
  

			
	 DURATEK, INC.

		
	By:	 	 /S/ J. I. EVEREST II

	Name:	 	J. I. Everest II
	Title:	 	CFO

  

			
	 CITICORP NORTH AMERICA, INC., as
 Administrative Agent, Collateral Agent and a Lender

		
	By:	 	 /S/ JULIE PERSILY

	Name:	 	Julie Persily
	Title:	 	Managing Director

 [signatures continue on the following page] 

 Annex I 
 Attached. 

 EXECUTION VERSION 
  

 $240,000,000 
 CREDIT AGREEMENT 
 Dated as of
June 7, 2006 
 among 
 DRAGON MERGER CORPORATION 
 as Borrower before the Merger 
 DURATEK, INC. 
 as Borrower after the Merger 
 THE LENDERS FROM TIME TO TIME PARTY HERETO 
 as Lenders 
 CITIGROUP GLOBAL MARKETS INC. 
 as Sole Lead Arranger and Sole Bookrunner 
 CITICORP NORTH AMERICA, INC. 
 as Administrative Agent and Collateral Agent 
 and 
 CALYON NEW YORK BRANCH 
 as Syndication Agent 
  

 Cahill Gordon & Reindel LLP 
 80 Pine Street 
 New York, New York 10005 

 Table of Contents 
  

					
	 	  	 	  	Page
	ARTICLE 1.
	
	DEFINITIONS
			
	 Section 1.1
	  	Defined Terms.	  	1
	 Section 1.2
	  	Defined Agreements as Modified.	  	23
	 Section 1.3
	  	Computation of Time Periods; Other Definitional Provisions.	  	23
	 Section 1.4
	  	Accounting Terms.	  	24
	 Section 1.5
	  	Pro Forma Calculations.	  	24
	
	ARTICLE 2.
	
	LOANS
			
	 Section 2.1
	  	The Loans.	  	24
	 Section 2.2
	  	Manner of Borrowing and Disbursement.	  	24
	 Section 2.3
	  	Interest.	  	26
	 Section 2.4
	  	Repayment.	  	27
	 Section 2.5
	  	[Reserved].	  	27
	 Section 2.6
	  	Optional Prepayments and Application of Prepayments.	  	27
	 Section 2.7
	  	[Reserved]	  	28
	 Section 2.8
	  	Mandatory Prepayments.	  	28
	 Section 2.9
	  	Evidence of Debt.	  	29
	 Section 2.10
	  	Manner of Payment.	  	29
	 Section 2.11
	  	Reimbursement.	  	31
	 Section 2.12
	  	Pro Rata Treatment.	  	32
	 Section 2.13
	  	Capital Adequacy.	  	32
	 Section 2.14
	  	Taxes.	  	33
	
	ARTICLE 3.
	
	CONDITIONS PRECEDENT
			
	 Section 3.1
	  	Conditions Precedent.	  	35
	
	ARTICLE 4.
	
	REPRESENTATIONS AND WARRANTIES
			
	 Section 4.1
	  	Representations and Warranties.	  	40
	 Section 4.2
	  	Survival of Representations and Warranties, Etc.	  	48
	
	ARTICLE 5.
	
	GENERAL COVENANTS
			
	 Section 5.1
	  	Preservation of Existence and Similar Matters.	  	48

  

 - i - 

 CREDIT AGREEMENT 
 This CREDIT AGREEMENT, dated as of June 7, 2006, is made by and among DRAGON MERGER CORPORATION, a Delaware corporation (“Dragon”
and, before the Merger, “Duratek”), DURATEK, INC., a Delaware corporation (“Target” and (i) after the Merger and (ii) for the purposes of the representations and warranties made pursuant to the Loan
Documents on the Agreement Effective Date, “Duratek”), the Lenders party hereto from time to time, CITIGROUP GLOBAL MARKETS INC. (“CGMI”), as sole lead arranger (the “Arranger”), CITICORP NORTH
AMERICA, INC. (“CNAI”), as administrative agent (the “Administrative Agent”) and as collateral agent (the “Collateral Agent” and, together with the Lenders, the “Lenders”), and
CALYON NEW YORK BRANCH (“Calyon”), as syndication agent (the “Syndication Agent”). 
 WITNESSETH: 

 WHEREAS, (i) EnergySolutions, LLC (“EnergySolutions”) shall acquire, directly or indirectly (the “Duratek
Acquisition”), all of the equity interests of Duratek, Inc., in accordance with a merger agreement dated as of February 6, 2006 among EnergySolutions, Dragon and Target (the “Duratek Acquisition Agreement”) pursuant to
which, Dragon will merge (the “Merger”) on the Agreement Date with and into Target, with Target surviving the Merger; 
 WHEREAS, in connection with the Duratek Acquisition, EnergySolutions shall repay all existing indebtedness of the Acquired Business (as defined below) (the “Duratek Refinancing”), other than such indebtedness set forth on
Schedule 1-A hereto; 
 WHEREAS, simultaneously herewith, EnergySolutions shall enter into the EnergySolutions Credit Agreement (as
defined below), pursuant to which the lenders party thereto will make the EnergySolutions Term Loans (as defined below) in an aggregate principal amount of $530,000,000, will commit to make revolving loans to EnergySolutions in an aggregate
principal amount of up to $75,000,000 and will make Synthetic Deposits (as defined in the EnergySolutions Credit Agreement) of $25,000,000. 
 WHEREAS, to fund the Duratek Refinancing and the Duratek Acquisition, Duratek has requested that the Lenders make loans to Duratek on the Agreement Date; 
 NOW THEREFORE, the parties hereto hereby agree as follows as of the date first written above: 
 ARTICLE 1.

 Definitions 
 Section 1.1 Defined Terms. 
 For the purposes hereof, the following terms shall have the following meanings: 

“Acquired Business” shall mean Duratek, Inc. and its subsidiaries. 
 “Acquisition” shall mean (whether by purchase, exchange, issuance of capital stock, limited partnership interests, general partnership
interests or other equity or debt securities, merger, reorganization or any other method) (a) any acquisition by EnergySolutions or any of the Subsidiaries of all or substantially all of any other Person, which Person shall then become
consolidated with 

 
ratable assignment of all or a portion of such Lender’s EnergySolutions Term Loans and Synthetic Deposits and no assignment of the Loans shall be made
by any Lender hereunder unless such Lender makes a simultaneous ratable assignment of all or a portion of its EnergySolutions Loans and its Synthetic Deposits. Before and after any assignment of Term Loans by any Lender, the ratios of (i) such
Lender’s Term Loans to the aggregate principal amount of Term Loans outstanding, (ii) such Lender’s Synthetic Deposits to the aggregate amount of Synthetic Deposits and (iii) such Lender’s EnergySolutions Term Loans to the
aggregate principal amount of EnergySolutions Term Loans outstanding, shall be identical. 
 (c) The Administrative Agent, acting for this
purpose as an agent of Duratek, shall maintain a copy of each Assignment and Acceptance delivered to it and a register for the recordation of the names and addresses of the Lenders and the Commitments of and the principal amount of the Loans owing
to each Lender pursuant to the terms hereof from time to time (the “Register”). The entries in the Register shall be conclusive, absent manifest error, and Duratek, the Administrative Agent and the Lenders shall treat each Person
whose name is recorded in the Register pursuant to the terms hereof as a Lender hereunder for all purposes of this Agreement, notwithstanding notice to the contrary. The Register shall be available for inspection at the offices of the Administrative
Agent by Duratek or any Lender, at any reasonable time during normal business hours and from time to time upon reasonable prior notice. Each Lender agrees to provide the Administrative Agent and Duratek with written notice of the assignment of all
or part of its rights hereunder. Upon the Administrative Agent’s receipt of a duly completed Assignment and Acceptance executed by an assigning Lender and an assignee Lender, the assignee’s completed administrative questionnaire (unless
the assignee is already a Lender), the fee referred to in Section 11.5(b) above and any written consent to such assignment required thereby, the Administrative Agent shall accept such Assignment and Acceptance and record the information
contained therein in the Register. No assignment shall be effected for purposes of this Agreement unless it has been recorded in the Register as provided in this paragraph. 
 (d) Notwithstanding anything to the contrary contained in this Section 11.5, any Lender that is a fund that invests in bank loans may
(without the consent of Duratek or the Administrative Agent) pledge all or a portion of its rights in connection with this Agreement to the trustee or any holder of obligations or agents therefor owed, or securities issued, by such fund as security
for such obligations or securities; provided that such trustee shall not be entitled to exercise any of the rights of a Lender under the Loan Documents, even though such trustee may have acquired ownership rights with
respect to the pledged interest through foreclosure or otherwise. No pledge described in the immediately preceding sentence shall release any such Lender from its obligations hereunder. 
 (e) [Reserved]. 
 (f) Except as specifically
set forth in Section 11.5(b) hereof, nothing in this Agreement or any Notes, express or implied, is intended to or shall confer on any Person other than the respective parties hereto and thereto and their successors and assignees
permitted hereunder and thereunder any benefit or any legal or equitable right, remedy or other claim under this Agreement or any Notes. 
 (g) The provisions of this Section 11.5 shall not apply to any purchase of participations among the Lenders pursuant to Section 2.12 hereof. 
 (h) Notwithstanding anything to the contrary contained herein, any Lender (a “Granting Lender”) may grant to a special purpose funding
vehicle identified as such in writing from time to time by the Granting Lender to the Administrative Agent and Duratek (a “Conduit Lender”) the option to provide all or any part of any Loan that such Granting Lender would otherwise
be obligated to make pursuant to 
  

 - 88-Second Amendment to Credit Agreement, dated as of February 9, 2007

 Exhibit 10.7 
 AMENDMENT NO. 2, dated as of February 9, 2007 (this “Amendment”), to the Credit Agreement, dated as of June 7, 2006 and as amended through the date hereof (as amended, restated,
amended and restated, supplemented or otherwise modified from time to time, the “Credit Agreement”; capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Credit
Agreement), by and among Dragon Merger Corporation (before the Merger, “Duratek”), Duratek, Inc. (after the Merger, “Duratek”), CITICORP NORTH AMERICA, INC., as administrative agent (in such capacity, the
“Administrative Agent”) and the other Agents and Lenders from time to time party thereto. 
 WHEREAS, on the date hereof,
EnergySolutions, LLC (“EnergySolutions”), ENV Holdings and the agents and certain lenders party thereto will amend the EnergySolutions Credit Agreement (as defined in the Credit Agreement) to provide for an additional $75.0 million
of synthetic deposits (such additional synthetic deposits the “Synthetic A Deposits”) to be made by certain lenders party the EnergySolutions Credit Agreement; 
 WHEREAS, the parties to the Credit Agreement wish to amend the Credit Agreement on the terms and conditions set forth herein to permit the Synthetic A
Deposits; 
 NOW, THEREFORE, in consideration of the premises and covenants contained herein and for other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound hereby, agree as follows: 
 Section 1. Amendments. 
 (a) Section 7.1: Indebtedness of Holdco, EnergySolutions and Its
Subsidiaries 
 Section 7.1(o) of the Credit Agreement here hereby amended by replacing such clause (o) in its entirety and
replacing it with the following: 
 (o) Indebtedness of up to $705,000,000 aggregate principal amount outstanding under the EnergySolutions
Credit Agreement and, so long as no Default or Event of Default has occurred and is continuing or would result therefrom, Permitted Refinancing Indebtedness in respect thereof; 
 (b) Section 11.5 Binding Effect and Assignment 
 Section 11.5(b) of the Credit Agreement is hereby amended by adding the following parenthetical after each instance of the term “Synthetic Deposits” in the last two sentences of such section: (other
than Synthetic A Deposits (as defined in this Amendment No. 2)). 
 (c) Exhibit P — Form of Assignment and
Acceptance 
 Exhibit P shall be amended to give effect to the change set forth in Section 1(b) of this Amendment and shall be in
the form attached as Annex 1 hereto. 

 Section 2. Representations and Warranties. 
 Duratek represents and warrants to the Lenders as of the date hereof that: 
 (a) The execution and delivery of this Amendment by Duratek has been duly authorized. 
 (b) Neither the execution or delivery by Duratek of this Amendment, nor compliance by it with the terms and provisions hereof will,
(i) violate any Applicable Law respecting Holdco, EnergySolutions, Parent or their Subsidiaries or (ii) conflict with, result in a breach of or constitute a default under the certificate or articles of incorporation or by-laws, operating
agreement or the partnership agreement, as the case may be, as such documents are amended, of Holdco, of EnergySolutions, of Parent or of any of their Subsidiaries, or under any material indenture, agreement, or other instrument, to which Holdco,
EnergySolutions, Parent or any of their Subsidiaries is a party or by which any of them or their respective properties may be bound. 
 (c) Before and after giving effect to this Amendment, the representations and warranties set forth in the Credit Agreement are true and correct in all material respects (except with respect to representations and warranties qualified by
materiality, which are true and correct in all respects) with the same effect as if made on the date hereof, except to the extent such representations and warranties expressly relate to an earlier date in which case they are true and correct in all
material respects (except with respect to representations and warranties qualified by materiality, which are true and correct in all respects) as of such earlier date. 
 (d) At the time of and after giving effect to this Amendment, no Default or Event of Default has occurred and is continuing. 

Section 3. Conditions to Effectiveness. This Amendment shall become effective on the date (the “Amendment Effective
Date”) on which each of the following conditions is satisfied: 
 (a) The Administrative Agent (or its counsel) shall
have received from Lenders constituting the Majority Lenders and each of the other parties hereto either (i) a counterpart of this Amendment signed on behalf of such party or (ii) written evidence satisfactory to the Administrative Agent
(which may include telecopy transmission of a signed signature page of this Amendment) that such party has signed a counterpart of this Amendment; and 
 (b) All corporate and other proceedings, if any, taken or to be taken in connection with this Amendment and all documents incidental thereto, whether or not referred to herein, shall be satisfactory in form and
substance to the Administrative Agent and its counsel. 
 (c) The Administrative Agent and the Lead Arranger shall have
received all reasonable costs, fees, expenses and other amounts due and payable on or prior to the Amendment Effective Date, including reimbursement or payment of all out-of-pocket expenses (including the reasonable fees, disbursements and other
charges of Cahill 

  

 Duratek Amendment 
 -2- 

 
Gordon & Reindel LLP, counsel for the Lead Arranger) required to be reimbursed or paid by EnergySolutions, and for which invoices have been
presented to EnergySolutions on or prior to the business day prior to the Amendment Effective Date. 
 Section 4. Reference to the
Effect on the Loan Documents. 
 (a) As of the Amendment Effective Date, each reference in the Credit Agreement to
“this Agreement,” “hereunder,” “hereof,” “herein,” or words of like import, and each reference in the other Loan Documents to the Credit Agreement (including, without limitation, by
means of words like “thereunder”, “thereof” and words of like import), shall mean and be a reference to the Credit Agreement, as amended hereby, and this Amendment and the Credit Agreement shall be read together and
construed as a single instrument. 
 (b) Except as expressly amended hereby or specifically waived above, all of the terms and
provisions of the Credit Agreement and all other Loan Documents are and shall remain in full force and effect and are hereby ratified and confirmed. 
 (c) The execution, delivery and effectiveness of this Amendment shall not, except as expressly provided herein, operate as a waiver of any right, power or remedy of the Lenders, the Borrower or the Administrative
Agent under any of the Loan Documents, nor constitute a waiver or amendment of any other provision of any of the Loan Documents or for any purpose except as expressly set forth herein. 
 (d) This Amendment is a Loan Document. 
 Section 5. Roles. Citigroup Global Markets Inc. shall act in the capacities as Lead Arranger (the “Lead Arranger”) and Syndication Agent with respect to this Amendment, but in
such capacities shall not have any obligations, duties or responsibilities, nor shall incur any liabilities, under this Amendment or any other Loan Document. 
 Section 6. Counterparts. This Amendment may be executed in any number of counterparts and by different parties hereto on separate counterparts, each of which when so executed and delivered shall
be deemed to be an original, but all of which when taken together shall constitute a single instrument. Delivery of an executed counterpart of a signature page of this Amendment by facsimile transmission shall be effective as delivery of a manually
executed counterpart hereof. 
 Section 7. Applicable Law. THIS AGREEMENT SHALL BE GOVERNED BY, CONSTRUED AND ENFORCED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 
 Section 8. Severability. 
 The fact that any term or provision of this Agreement is held invalid, illegal or unenforceable as to any person in any situation in any jurisdiction
shall not affect the validity, enforceability or legality of the remaining terms or provisions hereof or the validity, enforceability or legality of such offending term or provision in any other situation or jurisdiction or as applied to any person.

  

 Duratek Amendment 
 -3- 

 Section 9. Headings. The headings of this Amendment are for purposes of reference
only and shall not limit or otherwise affect the meaning hereof. 
 Section 10. Affirmations, 
 (a) Duratek (i) expressly acknowledges the terms of the Credit Agreement, as amended by this Amendment No. 2, (ii) ratifies
and affirms its obligations under the Loan Documents (including guarantees and security agreements) executed by it and (iii) acknowledges, renews and extends its continued liability under all such Loan Documents and agrees such Loan Documents
remain in full force and effect. 
 (b) Duratek hereby reaffirms, as of the date hereof, (i) the covenants and agreements
contained in each Loan Document to which it is a party, including, in each case, such covenants and agreements as in effect immediately after giving effect to this Amendment and the transactions contemplated hereby, and (ii) its guarantee of
payment of the Obligations (including, without limitation, relating to the Synthetic A Deposits) pursuant to the Guarantees and the Lien on the Collateral securing payment of the Obligations (including, without limitation, the Synthetic A Deposits)
pursuant to the Security Documents. 
 (c) Duratek represents and warrants that, immediately after giving effect to this
Amendment, each Loan Document, in each case as modified by this Amendment, is enforceable against it in accordance with its terms (except, in any case, as such enforceability may be limited by applicable bankruptcy, insolvency, reorganization or
similar laws affecting creditors’ rights generally and by principles of equity). 
 [SIGNATURE PAGES FOLLOW] 
  

 Duratek Amendment 
 -4- 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the date
first above written. 
  

			
	DURATEK, INC.
		
	By:	 	/S/ JEAN I. EVEREST II
		 	Name: Jean I. Everest II
		 	Title:   Senior Vice President

  

 Duratek Amendment 
 -5- 

			
	CITICORP NORTH AMERICA, INC., as Administrative Agent, Collateral Agent and a Lender
		
	By:	 	/S/ BLAKE GRONICH
		 	Name: Blake Gronich
		 	Title:   Vice President
	
	CITIGROUP GLOBAL MARKETS INC., as Lead Arranger
		
	By:	 	/S/ JULIE PERSILY
		 	Name: Julie Persily
		 	Title:   Managing Director

  

 Duratek Amendment 
 -6- 

									
		 		 	_______________________________, as a Lender
					
		 		 		 	By:	 	 
		 		 		 		 	Name:
		 		 		 		 	Title:
	[The Amendment was executed by authorized signatories of 267 Lender Institutions:]	 		 		 	

  

 Duratek Amendment 
 -7-

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