Dataset on Nonlinear Dynamic Failure Analysis of Rupture Disc Assemblies under Variable Pressure Rates in CFETR Vacuum Vessel Pressure Suppression System

This dataset provides comprehensive data on the nonlinear dynamic failure analysis of rupture disc assemblies (RDAs) in the Vacuum Vessel Pressure Suppression System (VVPSS) of the China Fusion Engineering Test Reactor (CFETR). The data were collected through a hybrid methodology integrating theoretical modeling, finite element simulations, and experimental testing to characterize the behavior of rupture discs (RDs) under variable pressure rise rates, ranging from quasi-static ($\leq 10 kPa/s) to transient ( 100 MPa/s) conditions. The dataset includes measurements from physical experiments conducted on reverse-arch slotted RDs, capturing rupture pressures, opening times, and buckling modes under controlled pressurization scenarios simulating in-vessel loss of coolant accidents (In-VV LOCA) and loss of vacuum accidents (LOVA). Experimental setups utilized high-pressure test rigs to apply pressure rates up to 20 MPa/s, with sensors recording pressure transients, deformation patterns, and failure thresholds. Finite element simulation data, generated using implicit and explicit dynamic solvers in software like ABAQUS, include stress distributions, strain rates, and geometric instability metrics (e.g., anti-arch behavior) for both RD configurations across multiple loading conditions. Additional data encompass structural parameters (e.g., disc thickness, diameter, arch height), material properties (e.g., yield strength, ultimate tensile strength), and upstream pipeline pressure drop measurements. The dataset is stored in a structured format, including CSV files for experimental measurements, simulation output files, and metadata detailing test conditions and model parameters. The data are openly accessible for reuse in nuclear safety research, particularly for validating dynamic failure models, optimizing pressure relief systems, or comparing RD performance in fusion and fission reactor environments. Potential applications include enhancing safety design for fusion reactors, developing rate-dependent failure prediction models, and benchmarking simulation tools for high-pressure transient analysis.DATA DESCRIPTION This dataset characterizes the nonlinear dynamic failure behavior of rupture disc assemblies (RDAs) in the CFETR Vacuum Vessel Pressure Suppression System (VVPSS) under variable pressure rise rates. It includes experimental measurements, finite element simulation outputs, and design parameters. The dataset is organized into three main folders: Design Parameters, Numerical Simulations, and Experimental Data. Below, each folder, subfolder, and file is described, detailing variables and contents. Table 1 summarizes the folder structure and file contents for clarity.Design Parameters This folder contains data on the structural and geometric parameters of rupture discs (RDs) and VVPSS components.1.1_PRD_boost_data (CSV): Contains geometric and material parameters for positive-arch rupture discs (PRDs). Variables include disc diameter (mm), thickness (mm), arch height (mm), yield strength (MPa), and ultimate tensile strength (MPa) under quasi-static conditions (≤ 10 kPa/s).1.2_SRD_boost_data (CSV): Includes slotted reverse-arch rupture discs (SRDs) parameters. Variables mirror those in 1.1_PRD_boost_data, with additional slot geometry data (slot length, width in mm).1.3_VVPSS_system_components (CSV): Lists VVPSS component specifications, including pipeline dimensions (diameter, length in mm), suppression tank volumes (m³), and material properties (e.g., stainless steel grade, density in kg/m³).2 Numerical Simulations This folder contains simulation data from finite element analyses using ABAQUS with implicit and explicit dynamic solvers and related codes in PDF format.2.1_Pressure_drop2.1.1_Components_affecting_drop (CSV): Records pipeline components influencing pressure drop, including valve types, elbow angles (degrees), and pipe roughness (mm).2.1.2_Drop_calculation_results (CSV): Contains calculated pressure drops (kPa) across the VVPSS pipeline under flow rates (m³/s) and pressure rates (kPa/s to MPa/s).2.2_Grid_independence_analysis2.2.1_Material_properties (CSV): Lists material properties for simulation, including Young’s modulus (GPa), Poisson’s ratio, and strain rate sensitivity for PRDs and SRDs.2.2.2_Fixed_forming_pressure (CSV): Records simulation results for fixed pressure loads (kPa) with varying mesh sizes (element count, mm), confirming grid independence.2.2.3_Simulation_code (PDF): Contains ABAQUS script for grid independence analysis, defining mesh parameters and solver settings.2.3_Preliminary_design_results2.3.1_Morphology_profiles (CSV): Stores deformation profiles (displacement in mm) for PRDs and SRDs under pressure rates (kPa/s to MPa/s).2.3.2_Preliminary_design_code (PDF): Includes ABAQUS script for preliminary RDA design simulations, specifying boundary conditions and load steps.2.4_Structural_response_data2.4.1_Mode_analysis_results (CSV): Contains buckling mode shapes (mode number, displacement in mm) for PRDs and SRDs under transient loads.2.4.2_Boost_rate_region_division (CSV): Divides pressure rise rates into regions (e.g., quasi-static: ≤ 10 kPa/s, transient: ≥ 10 MPa/s) with corresponding failure metrics.2.4.3_Boost_rate_vs_rupture_pressure (CSV): Records rupture pressures (MPa) versus pressure rise rates (MPa/s) for PRDs and SRDs.2.4.4_Mode_analysis_code (PDF): Provides ABAQUS script for modal analysis, detailing eigenvalue extraction methods.2.4.5_Rupture_calc_code (PDF): Includes ABAQUS script for rupture pressure calculations, specifying failure criteria (e.g., maximum stress).2.5_Design_guidelines2.5.1_Max_allowable_design_pressure (CSV): Lists maximum allowable pressures (MPa) for RD designs under various loading conditions.2.5.2_Minimum_cavity_volume (CSV): Specifies minimum VVPSS cavity volumes (m³) required to prevent overpressure3 Experimental Data: This folder includes measurements from physical tests on PRDs and SRDs.3.1_Devices_fixtures_instruments_images (CSV): Lists test equipment details, including pressure transducers (model, range in MPa), high-speed cameras (frame rate in fps), and fixture dimensions (mm). Image filenames for test setups are included.3.2_Rupture_pressure_data (CSV): Contains experimental measurements of rupture pressures (MPa), opening times (ms), and buckling occurrences (binary: yes/no) for PRDs and SRDs at pressure rates up to 20 MPa/s.