Document: NRC Regulatory Guide
Document ID: b143ccef-ed08-482d-bc4b-b4e012328090
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:
tems). As discussed in the supplementary information for the final LWA rule, excavation and other site preparation activities, whether permanent or temporary, are outside the scope of construction and are considered preconstruction. For example, piles driven to support the erection of a bridge for a temporary or permanent access road would not be considered as construction and may be performed without an LWA or combined license. The installation of a temporary feature within the excavation or area associated with construction that will be removed during construction is considered to be a preconstruction activity. Such features include some retaining walls, some types of dewatering systems, ramps, and other structures that have no physical presence following construction. Regarding installation of temporary features within the necessary excavation during preconstruction, if the applicant proposes to abandon the subject feature in place, the NRC must approve DG-1325, Page-118 that action (i.e., abandonment) as part of an LWA or COL application. Examples may include certain retaining walls and some types of dewatering systems. The applicant must show that the abandoned feature would not adversely affect the SSCs, introduce undesirable flow paths, or otherwise conflict with nuclear plant safety or regulatory compliance, and the NRC would have to approve. Construction Crane Foundations and Support Pads Construction includes placing permanent features (e.g., retaining walls and foundations) within the necessary excavations for SSCs within the definition of construction. Site preparation activities that are performed outside the necessary excavations are considered preconstruction. Therefore, installing foundations and support pads outside the necessary excavations for SSCs that are within the definition of construction would be considered preconstruction. As stated previously, applicants should ensure that these preconstruction activities are separate from, and do not