Added Section H: Special Contract Requirements Clause H.57 Key Personnel (DOE-H-2070, OCT 2014) – Alternate I (OCT 2014). Deleted and Replaced Section B: Supplies and Services Clause B.3, Transition Cost, Estimated Costs and Maximum Available Fee added the "Total Available Fee" table for Fiscal Year 2024-Fiscal Year 2028 and amended the Fiscal Year 2023 amounts in the existing table.

Deleted and Replaced Section J: List of Documents, Exhibits, and Other Attachments Attachment B, Key Personnel is deleted and replaced with updated titles for the Key Personnel.

Deleted and Replaced Section H: Special Contract Requirements Clause H.3 Employee Compensation: Pay and Benefits is deleted and replaced with Clause H.3 Employee Compensation: Pay and Benefits (DOE-H-2001, Jun 2022).

Deleted and Replaced Section I: Contract Clauses Clause I.126 970.5227-3 Technology Transfer Mission (Aug 2002) Alternate I (Aug 2002) (Deviation) is deleted and replaced with Clause I.126 970.5227-3 Technology Transfer Mission (Aug 2019) Alternate I (Aug 2002) (Deviation)

Deleted and Replaced Section I: Contract Clauses Clause I.125 970.5227-2 Rights in Data-Technology Transfer (Dec 2000) (Deviation-Jul 2006) is deleted and replaced with Clause I.125 970.5227-2 Rights in Data-Technology Transfer (Dec 2000) (Deviation) Clause I.132 970.5227-10 Patent Rights – Management and Operating Contracts, Nonprofit Organization or Small Business Firm Contractor (Dec 2000) is deleted and replaced with Clause I.132 970.5227-10 Patent Rights – Management and Operating Contracts, Nonprofit Organization or Small Business Firm Contractor (Dec 2000) (Deviation).

Deleted and Replaced Section J: List of Documents, Exhibits, and Other Attachments Attachment C, Small Business Subcontracting Plan Fiscal Year 2021 version is deleted and replaced with the Small Business Subcontracting Plan Fiscal Year 2022. Attachment E, Applicable Laws and Regulations (List A) version contained in M1277 is deleted and replaced with the Applicable Laws and Regulations (List A) contained in M1318.

Deleted and Replaced Section H: Special Contract Requirements Clause H.3 Employee Compensation: Pay and Benefits is deleted and replaced to the contract with the most current version.

Added Section I: Contract Clauses Clause I.177 52.242-3 Penalties for Unallowable Costs (Sep 2021) is added to the contract as a new clause.

Added Section I: Contract Clauses Clause 176 52.223-99 – Ensuring Adequate COVID-19 Safety Protocols for Federal Contractors (OCT 2021) (DEVIATION) is added to the contract as a new clause.

Deleted and Replaced Total award value increased from $6.5 billion to $9 billion in FPDS-NG to accommodate remaining award term. Section J: List of Documents, Exhibits, and Other Attachments* Attachment J – Performance Evaluation and Measurement Plan (PEMP) dated March 9, 2021, is deleted and replaced with the Fiscal Year 2022 PEMP dated Sept. 30, 2021, and is incorporated into this contract by reference.

Deleted and Replaced Section J: List of Documents, Exhibits, and Other Attachments* Attachment A, Personnel (Appendix A)* effective Aug. 7, 2020, is deleted and replaced with Attachment A, Personnel (Appendix A), effective Sept. 15, 2021, that is incorporated into this contract by reference. Attachment F, Operating and Administrative Requirements (List B) is deleted and replaced as follows:

Deleted and Replaced Section J: List of Documents, Exhibits, and Other Attachments* Attachment D, Special Financial Institution Account Agreement along with Mod 1 authorizing Option Period 1, 6/1/21-5/31/22, of the Period of Performance are added and incorporated by reference. Attachment F, Operating and Administrative Requirements (List B), is deleted and replaced.

Deleted and Replaced Section J: List of Documents, Exhibits, and Other Attachments* Attachment K, Calendar Year 2020 Diversity Plan is deleted and replaced with Calendar Year 2021 Diversity Plan and is incorporated into this contract by reference.

Deleted and Replaced Section H: Special Contract Requirements Clause H.53, Paid leave under Section 3610 of the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) to maintain employees and subcontractors in a ready state is updated to reflect the extended date range through Sept. 30, 2021.

Deleted and Replaced Section J: List of Documents, Exhibits, and Other Attachments* Attachment J, Fiscal Year 2020 Performance Evaluation and Measurement Plan dated Sept. 30, 2020, is deleted and replaced with the Fiscal Year 2021 Performance Evaluation and Measurement Plan dated March 9, 2021, and is incorporated into this contract by reference.

Deleted and Replaced Section J: List of Documents, Exhibits, and Other Attachments* Attachment C, Fiscal Year 2020 Small Business Subcontracting Plan is deleted and replaced with Attachment C, Fiscal Year 2021 Small Business Subcontracting Plan.

Deleted and Replaced Section H: Special Contract Requirements Clause H.53 - Paid leave under Section 3610 of the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) to maintain employees and subcontractors in a ready state is updated to reflect the change to the effective date range through March 31, 2021.

Deleted and Replaced Section H: Special Contract Requirements Clause H.53 - Paid leave under Section 3610 of the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) to maintain employees and subcontractors in a ready state is updated to reflect the change to the effective date range through Dec. 18, 2020.

Deleted and Replaced: Section H: Special Contract Requirements Clause H.9 - Responsible Corporate Official is updated to acknowledge Richard Thomas Fleener as the new Chair, Board of Directors.

Deleted and Replaced: Section H: Special Contract Requirements Clause H.53 - Paid leave under Section 3610 of the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) to maintain employees and subcontractors in a ready state reflects a change to update the effective date range and limiting preapproval for paid leave.