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:
tion 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 detailed to allow the staff to evaluate independently the applicability of the model to the design problem in question. This report will provide the basis for the interpretation of model results and for any conclusions reached. The applicant should not dismantle the models until the staff has reviewed the submittals. Preserving the model for a maximum of 1 year after the submission of the model documentation to the NRC will be acceptable in most cases. D. IMPLEMENTATION The purpose of this section is to provide information to applicants and licensees regarding the NRC’s plans for using this draft regulatory guide. The NRC does not intend or approve any imposition or backfit in connection with its issuance. DG-1198, Page 5 The NRC has issued this draft guide to encourage public participation in its development. The NRC will consider all public comments received in development of the final guidance document. In some cases, applicants or licensees may propose an alternative or use a previously established acceptable alternative method for complying with specified portions of the NRC’s regulations. Otherwise, the methods described in this guide will be used in evaluating compliance with the applicable regulations for license applications, license amendment applications, and amendment requests. REGULATORY ANALYSIS 1. Statement of the Problem The NRC published Revision 1 of Regulatory Guide 1.125 in October 1978. The regulatory guide describes the details and documentation an applicant should include with its PSAR to support the use of physical hydraulic model testing for predicting the performance of safety-related hydraulic structures and systems for nuclear power plants. The methods of measuring, reporting, and evaluating the results of physical modeling have evolved