Document: NUREG-0800
Document ID: 21b37b7c-b45c-4247-b4a5-c2f28df75be4
Document Type: srp
Title: INSTRUMENTATION AND CONTROLS (Tier 1)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070663.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.3.5
CFR Part: 
CFR Title: 

Content:
g the digital control system design process or stage of the lifecycle. The documents which demonstrate satisfactory implementation of the ITAAC will be available for inspection during the NRC audit at the completion of each of the above stages. The stages or phases should be shown in Tier 1. The NRC audit and the COL applicant conformance review points are shown in Chapter 7 of the staff's safety evaluation report. These should correspond with the phases described by the applicant in Tier 1. The actual stages, including the conformance review and audit points, will be determined for each of the software products to be developed when design implementation is scheduled to begin. At each stage, the design development must be verified by the COL applicant to be in accordance with the certified design process and the detailed design developed (through that stage) to be in conformance with the certified design. Upon completion of ITAAC activities for each stage, the COL applicant will certify to the NRC that the stage has been completed and the design and construction completed up through that stage is in compliance with the certified design. Although not required, the COL applicant should satisfactorily complete ITAAC activities at each stage prior to proceeding to the next stage of the design development process. Failure to successfully complete the ITAAC at a stage, as determined by the conformance review or the NRC audit, may require repeating an earlier stage ITAAC or changing the system design. The NRC staff will identify any open issues which require resolution for each stage of the ITAAC. Significant open issues which are not resolved could result in the NRC staff concluding that the ITAAC had not been satisfactorily completed. The ITAAC should contain the following information: The specific design commitments to be verified by the ITAAC, The inspections, tests, and/or analyses to be performed, and The corresponding acceptance criteria which demonstrates that the