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:
easured historical data are available. 3. Regulatory Position 3 Where full-scale structures or systems having characteristics similar to those being modeled exist and information about the observed or measured performance of the existing structures or systems is available, the applicant should compare the physical model results with the available information. If testing is or has been performed on existing full-scale structures or systems, the applicant should describe such tests and their results. The document should address the applicability of such tests to the problem in question and discuss any conclusions derived from the tests. If using the results of other model tests, the applicant should justify the use of these results and verify and document the ability of these other models to reproduce or predict prototype performance. The applicant should provide detailed documentation of data obtained from existing full-scale structures and systems, including: • instrumentation used; • description of the data collection network; • frequency of collection; • methods of collection; and • physical parameters existing at the time of collection, such as heat regimes, flow conditions, and atmospheric conditions. 4. Regulatory Position 4 The applicant should discuss any changes to the original design of the prototypes that result from the model test, documenting the designs that were modeled and the basis for modifying the design. The discussion should address any undesirable flow characteristics or failure modes for the design tested, as well as any other relevant problems. 5. Regulatory Position 5 The report covering the completed model tests should provide the data obtained from the tests, as well as the (1) instrumentation used, (2) description of the data collection network, (3) frequency of collection, and (4) method of collection. Figures, drawings, photographs, and text submitted as documentation for Regulatory Positions 2, 3, and 4 should be sufficiently