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:
e source and type of aggregate, the cement used, mix design data, and test results during construction; (4) electrical and mechanical equipment type; the rating of normal and emergency power supplies, hoists, cranes, valves, and valve operators; and control and alarm systems that could affect the safe operation of the water-control structure; (5) pertinent construction records, including construction sequence, problems, alterations, modifications, and maintenance repairs; (6) a water-control plan, including a regulation plan under normal conditions and during flood events or other emergency conditions; (7) an earthquake history, including a summary of significant earthquakes in the vicinity; and (8) principal design assumptions and analyses, including hydrologic and hydraulic analyses, stability and stress analyses, and seepage and settlement analyses. 5. Onsite Inspection Program The onsite inspection and monitoring program of water-control structures should be established and conducted systematically to minimize the possibility of overlooking significant features. A detailed checklist should be developed to document the inspection of structural and hydraulic features, including electrical and mechanical control equipment. Particular attention should be given to evidence of leakage, erosion, seepage, slope instability, undue settlement, displacement, tilting, cracking, deterioration, and the improper functioning of drains and relief wells; to verifying the adequacy and quality of maintenance and operating procedures; and to post-construction changes. The use of photographs and surveys for comparison of previous and present conditions and the documentation of new or progressive problems is encouraged. The inspection program should include a Pre-Decisional DG-1245, 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