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ASME VVUQ 30.1-2024 Scaling Methodologies for Nuclear Power Systems Responses, 2024
- CONTENTS
- Foreword
- ASME VVUQ Committee Roster
- CORRESPONDENCE WITH THE VVUQ COMMITTEE
- 1 PURPOSE, SCOPE, INTRODUCTION, AND NOMENCLATURE [Go to Page]
- 1.1 Purpose
- 1.2 Scope
- 1.3 Introduction
- 1.4 Nomenclature
- 2 CREATION OF THE ADEQUACY MATRIX AND VALIDATION MATRIX USING SCALED EXPERIMENTAL FACILITIES
- 3 SCALING HISTORY AND TYPES [Go to Page]
- 3.1 General
- 3.2 Volumetric Scaling Approach
- 4 OVERVIEW AND COMPARISON OF H2TS AND FSA SYSTEM DECOMPOSITION AND HIERARCHY
- 5 CONCEPT OF TIME–SCALE MODELING — DIMENSIONLESS GROUPS IN TERMS OF TIME RATIOS [Go to Page]
- 5.1 Introduction
- 5.2 Scale Identification
- 5.3 Top-Down Approach — Scaling Hierarchy
- 5.4 Combination of H2TS and FSA Approaches
- 5.5 Bottom-Up Approach
- 5.6 Two-Tiered Approach
- Figures [Go to Page]
- Figure 1.3-1 Determination of Model Adequacy
- Figure 2-1 Process for Creating Assessment Base for Licensing Purposes: Flowchart
- Figure 3.2-1 Comparison of Elongated Representations of Volumes in LOFT and Semiscale Mod-2A Test Facilities
- Figure 4-1 System Decomposition and Hierarchy for Processes Applied in H2TS
- Figure 4-2 Four Stages of H2TS
- Figure 5.2-1 Subvolumes, Vi, and Control Volume, V
- Figure 5.3.2-1 Changes of System Matrix for FSA During the Duration of NPP Transient
- Figure A-1.1-1 Control Volume, Transfer Area, Surface and Volume Effects, and State Variable
- Figure A-3-1 PWR Vessel Pressure Responses for Various Test Facilities in Dimensional Form
- Figure A-3-2 PWR Vessel Pressure Responses for Various Test Facilities in Dimensionless Form
- Figure A-5.2-1 Dimensionless Temperature and Its Relationship to Biot Number and the Decay Fractional Change Metric
- Figure A-5.2-2 Normalized PCT for 0.015 < ΠBi < 0.03
- Tables [Go to Page]
- Table A-1.1-1 Examples of Derivations of H2TS Dimensionless Groups (Time Ratios)
- Table A-2-1 State Variables, Agents of Change, FRCs, and Fractional Changes (Effect Metrics)
- Table A-3-1 Definition of Dimensionless Agents of Change and Fractional Rates of Change for Pressure Response Equation
- Table A-4-1 Definition of Dimensionless Agents of Change and Fractional Rates of Change for Void Fractions Equation
- Table A-5.1-1 Definition of Fractional Rates of Change and Fractional Change Metric for Peak Cladding Temperature Equation
- MANDATORY APPENDIX I REFERENCES
- NONMANDATORY APPENDIX A EXAMPLES OF EQUATIONS AND DIMENSIONLESS GROUPS USED FOR SCALING ANALYSIS [Go to Page]
- A-1 THE DIMENSIONLESS GROUPS IN H2TS
- A-2 THE DIMENSIONLESS GROUPS IN FSA
- A-3 REACTOR VESSEL PRESSURE RESPONSE
- A-4 REACTOR VESSEL WATER LEVEL RESPONSE
- A-5 PEAK CLADDING TEMPERATURE [Go to Page]
