{"artifact_id":"L1-359","layer":"L1","title":"Reactor Thermal-Hydraulics — coupled T/H with neutronics","domain":"Nuclear Engineering","sub_domain":"RELAP / CTF core thermal-hydraulic transient","physics_fingerprint":{"L_DAG":3.7,"title":"Reactor Thermal-Hydraulics — coupled T/H with neutronics","domain":"Nuclear Engineering","carrier":"thermal","primitives":["L.two_phase_flow","L.fuel_rod_conduction","L.coolant_energy","int.temporal"],"sub_domain":"RELAP / CTF core thermal-hydraulic transient","noise_model":"gaussian","problem_class":"nonlinear_inverse","solution_space":"temp_flow_reactor_core","difficulty_delta":5,"integration_axis":"temporal","sensing_mechanism":"thermocouples_flowmeters"},"observable_profile":{"metric":"PSNR_dB","regime":"Conditional stability; mismatch parameters dominate at Omega bounds.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"SNR_dB":30,"N_axial":24,"N_samples":1000,"N_assemblies":193,"fuel_k_error":0.0,"friction_factor_error":0.0,"boiling_correlation_error":0.0,"heat_transfer_coeff_error":0.0},"input_format":"measurement_only","problem_class":"thermal_hydraulics","forward_operator":"thermal_hydraulics_forward","epsilon_fn_center":"22.0"},"omega_bounds":{"SNR_dB":[0,40],"N_axial":[1,100],"N_samples":[100,100000],"N_assemblies":[1,1000],"fuel_k_error":[0.0,0.1],"friction_factor_error":[0.0,0.2],"boiling_correlation_error":[0.0,0.3],"heat_transfer_coeff_error":[0.0,0.3]},"epsilon_bounds":{"psnr_db":[10.0,45.0]},"allowed_problem_classes":["thermal_hydraulics"],"allowed_omega_dimensions":["N_assemblies","N_axial","N_samples","SNR_dB","friction_factor_error","boiling_correlation_error","fuel_k_error","heat_transfer_coeff_error","friction_factor_error","boiling_correlation_error","fuel_k_error","heat_transfer_coeff_error"],"allowed_forward_operators":["thermal_hydraulics_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":5,"kappa":600,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x566757c58309bb7484c76db4bb549387fe8154c6777c8ed44e12a808a7f3d70a","chain_tx_hash":"0xbb8a53776d3c15cfbb239abd438b7dfece7cf8ae6ff8adc765e57faa6690ead0","chain_block":41554097}