Document: NRC Regulatory Guide
Document ID: 6ab6a5e8-47ac-40c0-8c91-837b4e6f0026
Document Type: regulatory_guide
Title: Physical Models for Design and Operation of Hydraulic Structures and Systems for Nuclear Power Plants + HISTORY – HISTORY 09/2014 – Periodic Review of Revision 2 – Reviewed with issues for future consideration 03/2009 – Periodic Review of Revision 1 – Revise 07/2008 – DG-1198 , Proposed Revision 2 (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0810/ML081080301.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.125
CFR Part: 
CFR Title: 

Content:
the appropriate governing equations without the simplifying assumptions that are often necessary in analytical or numerical models. Physical hydraulic models may also be used to establish conservative and reasonable design or operating bases for sites, structures, or systems involving thermal and erosional problems. Examples of types of physical modeling studies of hydraulic structures and systems for nuclear power plants include, but are not confined to, the following: • intake structures and pump designs, • discharge structures, • energy and wave dissipation structures, • spillway and tailwater ratings for dams (water level and discharge relations), • release of water resulting from dam failures, • wave propagation and runup on a coastal structure, including tsunami effects, • stability of structure when exposed to waves and protection from waves, • erosion and deposition in streams and other water bodies and protection from these processes, • flow patterns and dispersion and dissipation of heated or contaminated effluents in receiving water bodies, • heat dissipation in receiving water bodies, • response of moored floating bodies to incident wave systems, and • response of harbors to waves. The applicant should incorporate the information described in the regulatory position in the PSAR/FSAR as required. However, the staff recognizes that it will not always be possible to incorporate such information in the initial application for a reactor license, since studies of this type may not be undertaken until after the safety analysis report is submitted. Such information may be added to the PSAR/FSAR, either by reference to separate reports or by insertion into the PSAR/FSAR. DG-1198, Page 3 C. REGULATORY POSITION Because not all hydraulic design problems can be resolved by the mechanics of similitude and because there are limitations to hydraulic modeling, the applicant should supply the NRC staff with certain documentation for any structural,