Document: NRC Regulatory Guide
Document ID: 5810150e-ee20-4cd1-b72f-6e918a603f73
Document Type: regulatory_guide
Title: Applications for Nuclear Power Plants (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1523/ML15233A056.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.206
CFR Part: 
CFR Title: 

Content:
he NRC recognizes that determinations of which SSCs fall within the definition of construction will depend on the design of the facility. In determining whether SSCs fall within the criteria in 10 CFR 50.10(a)(1)(v–vii), the maintenance rule guidance should not be used. For these criteria, SSCs are considered within the definition of “construction” if they are designed to comply with 10 CFR Part 73, “Physical Protection of Plants and Materials”; 10 CFR 50.48, “Fire Protection”; Criterion 3, “Fire Protection,” of Appendix A, “General Design Criteria for Nuclear Power Plants,” to 10 CFR Part 50, “Domestic Licensing of Production and Utilization Facilities”; 10 CFR 50.47, “Emergency Plans”; or Appendix E, “Emergency Planning and Preparedness of Production and Utilization Facilities,” to 10 CFR Part 50. In addition to the criteria in 10 CFR 50.10(a)(1)(i–vii) that are used to determine the scope of SSCs that fall within the definition of construction, the final LWA rule also specifies criteria in 10 CFR 50.10(a)(1) for construction activities that take place within the necessary excavation for SSCs that fall within the definition of construction. A necessary excavation is the portion of an excavation that provides sufficient construction access to the structures that are within the definition of construction. Applicants should ensure that these preconstruction activities are separate from, and do not result in adverse interactions with, construction-related SSCs, including influence on the stability (static and dynamic) analyses. The definition of construction includes any change made to the parent material in which the excavation occurs (e.g., soil compaction, rock grouting); the driving of piles; the installation of foundations; the installation of permanent drainage systems and geofabric; the placement of backfill, concrete (e.g., mudmats) or other materials that will not be removed before placement of the foundation of a