United States Nuclear Regulatory Commission - Protecting People and the Environment

Inspections, Tests, Analyses, and Acceptance Criteria (ITAAC)

A combined license enables the licensee to construct a plant and operate it once construction is complete if certain standards identified in the combined license are satisfied. These standards are called Inspections, Tests, Analyses, and Acceptance Criteria, or ITAAC. The ITAAC are typically derived from one of two sources. The majority of ITAAC are from the design certification for the particular reactor technology the plant uses. The remaining ITAAC are site specific, and are submitted in the licensee's combined license (COL) or early site permit (ESP) applications. For more information, see the following topics on this page:


As required by 10 CFR 52.97(b), the ITAAC identified in the combined license are necessary and sufficient, when successfully completed by the licensee, to provide reasonable assurance that the facility has been constructed and will operate in conformity with the combined license, the provisions of the Atomic Energy Act, as amended, and the Commission's rules and regulations. The COL includes ITAAC submitted in the COL application in addition to incorporating any ITAAC from referenced early site permits and standard design certifications, with the exception of referenced ITAAC whose acceptance criteria the Commission finds have been met when issuing the COL. Both the design certification and site specific ITAAC may be found in Appendix C of a given COL.

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Completing ITAAC

During construction, the licensee is responsible for performing all inspections, tests, and analyses and ensuring that the specified acceptance criteria are met. Throughout the construction process NRC inspectors will perform inspections based upon Inspection Manual Chapter 2503, "Construction Inspection Program: Inspections of Inspections, Tests, Analyses and Acceptance Criteria (ITAAC) Related Work," and the NRC's Construction Inspection Program at the plant site to confirm the licensee's findings. For every completed ITAAC, the licensee must submit to the NRC an ITAAC Closure Notification (ICN) as required by 10 CFR 52.99(c)(1). The NRC staff will review each ICN to verify that the ITAAC have been successfully completed, and will periodically publish a record of these reviews in the Federal Register to inform the public of successfully completed ITAAC. These Federal Register notices will be published until the deadline for hearing requests on ITAAC completion, but the NRC website will be updated throughout construction to reflect the NRC staff's determinations. In accordance with 10 CFR 52.99(c)(2), after a licensee has completed an ITAAC and submitted the ICN, licensees are required to report new information materially altering the basis for determining that a prescribed inspection, test, or analysis was performed as required, or finding that a prescribed acceptance criterion is met.

For any ITAAC that have not been successfully completed at least 225 days prior to the scheduled date for initial loading of fuel, 10 CFR 52.99(c)(3) requires the licensee to submit a notification stating that all inspections, tests, and analyses will be performed and the prescribed acceptance criteria will be met, and explain the licensee's plans for completing all ITAAC that have not yet been completed. This notification can be used by the public to determine if a hearing request on an ITAAC is warranted. After being informed of the intended date of fuel load by the licensee, 10 CFR 52.103(a) requires the NRC to publish a notice of intended operation in the Federal Register no less than 180 days prior to the scheduled loading of fuel. This notification allows any person whose interests may be affected by plant operation the opportunity to request a hearing within 60 days of the publication of the Federal Register notice on whether the facility as constructed complies, or on completion will comply, with the acceptance criteria in the combined license.

For more information please see the "ITAAC Verification Closure Process (IVCP) Office Instruction, NRO-REG-103."

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Transition from Construction to Operating Reactor

Upon successful completion of all ITAAC, 10 CFR 52.99(c)(4) requires the licensee to submit an All ITAAC Complete notification to the NRC. Once the NRC staff has verified that all ITAAC acceptance criteria are met, it will recommend that the Commission find under 10 CFR 52.103(g) that all acceptance criteria are met. The licensee cannot operate the facility until this finding has been made. In the event that a hearing request on the ITAAC has been granted, interim operation may be authorized under 10 CFR 52.103(c) if the Commission determines that there is reasonable assurance of adequate protection of the public health and safety during the interim period.

For more information on how the NRC makes the 10CFR52.103(g) finding, see Office Instruction LIC-114 (NRR) / REG-106 (NRO) ML18267A182, "Title 10 of the Code of Federal Regulations (10 CFR) Section 52.103(g) Finding and Communication Process". This office instruction describes the steps and provides templates for Commission memoranda informing the Commission of the status of regulatory activities in the final year of construction for a Part 52 licensed facility and for taking the actions necessary to make the 10 CFR 52.103(g) finding. The staff’s finding that the licensee has met all acceptance criteria in the combined license is required prior to operation.

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Plant-Specific ITAAC Information

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Appendix C of the COL contains the ITAAC for each unit.

Unit COL Appendix C - ITAAC
South Texas Project Unit 3 South Texas Project Unit 3 COL
South Texas Project Unit 4 South Texas Project Unit 4 COL
V.C. Summer Unit 2 V.C. Summer Unit 2 COL
V.C. Summer Unit 3 V.C. Summer Unit 3 COL
Vogtle Unit 3 Vogtle Unit 3 COL
Vogtle Unit 4 Vogtle Unit 4 COL

These reports are the updates throughout construction which notify the public of the NRC staff determination on ITAAC Closure.

Unit ITAAC Notifications Review Status Report
Vogtle Unit 3 ICN Review Status
Vogtle Unit 4 ICN Review Status
VC Summer Unit 2 ICN Review Status
VC Summer Unit 3 ICN Review Status
Unit ITAAC Dashboard Report
Vogtle Unit 3 Vogtle Unit 3 ITAAC Dashboard
Vogtle Unit 4 Vogtle Unit 4 ITAAC Dashboard

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Page Last Reviewed/Updated Wednesday, February 06, 2019