Document: NRC Regulatory Guide
Document ID: 8b2255d1-47a9-4dfe-ba41-568c561a89ee
Document Type: regulatory_guide
Title: Inspection of Water-Control Structures Associated with Nuclear Power Plants + HISTORY – HISTORY 01/2015 – DG-1245 , Proposed Revision 2 (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1325/ML13255A435.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.127
CFR Part: 
CFR Title: 

Content:
45, Page 8 review of previous inspection records. The inspection should include appropriate features and items, including, but not limited to, the following: a. Concrete Structures in General Concrete structures should be examined for the following: (1) Deterioration of Concrete Surfaces: The condition of the concrete surfaces should be examined to evaluate the deterioration and continuing serviceability of the concrete. Both American Concrete Institute (ACI) report 349.3R-02, “Evaluation of Existing Nuclear Safety Related Concrete Structures” issued June 2002 (and reapproved 2010) (Ref. 16) and ACI report 201.1R-08 “Guide for Conducting a Visual Inspection of Concrete in Service” issued July 2008 (Ref. 17) contain guidance on the methodology and procedures for concrete inspections as well as descriptions of typical problems. This RG endorses the appendix in ACI 201.1R-08 as an acceptable standard form for the visual inspection of concrete structures. (2) Structural Cracking: Concrete structures should be examined for structural cracking resulting from overstress caused by applied loads, shrinkage and temperature effects, or differential movements. (3) Movement—Horizontal and Vertical Alignment: Concrete structures should be examined for evidence of any abnormal or differential settlements, heaving, tilting, deflections, or lateral movements. (4) Condition of the Junctions: The conditions at the junctions of the structure with abutments or embankments should be determined. (5) Performance of Drains - Foundation, Joint, and Face: All drains should be examined to ensure that they can perform their design function. (6) Deterioration of Water Passages: All water passages and other concrete surfaces subject to running water should be examined for erosion, cavitation, obstructions, leakage, or significant structural cracks. (7) Seepage or Leakage: The faces, abutments, and toes of the concrete structures should be examined for evidence of seepage or abnormal