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:
roblems 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, thermal, erosional, or other physical hydraulic models that it used to establish design or operating bases. The regulatory position contained in this guide applies only to physical models used to predict the action or interaction of surface waters with hydraulic features located outside the containment. Generally, Regulatory Positions 1 and 2 describe information that should be furnished before the building and testing of the physical model, and Regulatory Positions 3 through 5 describe information needed after testing has been completed. It is desirable for the applicant to solicit staff reviews and recommendations before model construction and following or coincident with the submittal of the information listed in Regulatory Position 1, as well as to invite appropriate members of the NRC staff to be present periodically during model testing to observe the performance of the model. In addition, the applicant should provide partial test results for staff review and acceptance during the course of testing to allow for the consideration of those parameters that partial data collection shows to be important. 1. Regulatory Position 1 Before constructing the physical model, the applicant should submit a test plan that includes the following information: • the problem(s) to be resolved; • reasons for selecting the physical hydraulic model chosen to resolve the problem(s); • expected results and how these results will solve the stated problem(s); • a detailed description of the model, including a description of materials, instrumentation, and methods used to measure parameters, including resolution and error of instrumentation, scale relations, and other physical characteristics of the model; • a detailed description of the testing facilities; • methods that will