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:
s; 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 structure; the placement and compaction of a subbase; and the installation of reinforcing bars to be incorporated into the foundation of any SSCs that fall within the definition of construction. The definition of construction includes use of the “temporary” and “permanent” criteria that are discussed in the statement of considerations for the “Limited Work Authorization for Nuclear Power Plants –Final Rule” (72 FR 57429; October 9, 2007) (Ref. 110). The term “permanent,” in this context, includes anything that will exist in its final, in-place plant location after fuel load. By contrast, the term DG-1325, Page-116 “temporary” means anything that will be removed from the excavation before fuel load. Therefore, the installation of permanent retaining walls within an excavation and the erection of concrete forms for the foundations that will remain in place permanently (even if nonstructural) fall within the definition of construction. However, if erosion control measures are conducted outside the excavated hole and do not cover up the exposed soil conditions, those activities would be considered preconstruction. Also, the placement of temporary SSCs in the excavation, such as retaining walls, drainage systems, and erosion control barriers, all of which will be removed before fuel load, would be considered preconstruction. Discussion of Examples: In addition to the background discussion provided above, the following examples clarify the delineation of preconstruction and construction activities. It is important to recognize that the NRC may have regulatory authority over some preconstruction activities, such as the requirement to verify such activities by ITAAC (e.g., procurement of components). It should also be noted that, while the preconstruction