{
  "recorded_at": "2026-10-16T14:47:28.305482+00:00",
  "classification": "Conditional pre-A global heat/enthalpy screen; unaccepted geometry/power assumptions. Not local CFD, pilot acceptance or a DNBR result.",
  "conditions": {
    "recorded_at": "2026-10-16T14:43:48.412361+00:00",
    "classification": "Conditional pre-A whole-bundle energy/property screen, not accepted basis or case CFD/DNBR.",
    "equations": [
      "A_open = enclosure_width\u00b2 - 25*pi*rod_OD\u00b2/4",
      "m_dot = supplied_G * A_open",
      "Q = 25 * proposed_rod_linear_power * proposed_length",
      "h_out = actual_MCP_h_in + Q/m_dot"
    ],
    "supplied": {
      "rod_OD_m": 0.0095,
      "mass_flux_kg_m2_s": 3000,
      "pressure_Pa": 15500000,
      "inlet_temperature_K": 563.15,
      "bowed_rod_linear_power_W_m": 25000
    },
    "proposed": {
      "enclosure_inside_width_m": 0.063,
      "all_25_rods_at_supplied_bowed_rod_linear_power": true,
      "lengths_m": [
        0.5,
        1.0,
        1.5
      ],
      "pressure_constant": true,
      "adiabatic_enclosure": true,
      "inlet_away_from_grid": true,
      "steady_no_storage_or_work": true
    },
    "derived": {
      "open_inlet_area_m2": 0.0021969453938345076,
      "mass_flow_kg_s": 6.590836181503523,
      "nominal_per_rod_mean_heat_flux_W_m2": 837657.5952205018
    },
    "reused_inlet_run_id": "4ac275dfa69547b0946ebb83951ceb22",
    "inlet_sources": {
      "heos": {
        "path": "qualification/water-basis-r1/inlet_heos.json",
        "sha256": "5a74291a0cb9939b884e5adcab86cbf71e97efd47b8f63ac8830c02ed6c082ae"
      },
      "if97": {
        "path": "qualification/water-basis-r1/inlet_if97.json",
        "sha256": "dfecba202a829309ece0e9414a9648c9367c2fcb6f1b9c1c2af7b674b90b3511"
      }
    },
    "requests": [
      {
        "id": "heos_length_500",
        "backend": "heos",
        "length_m": 0.5,
        "total_power_W": 312500.0,
        "mass_flow_kg_s": 6.590836181503523,
        "enthalpy_rise_J_kg": 47414.31760616321,
        "arguments": {
          "fluid": "Water",
          "input1_key": "P",
          "input1_value": 15500000,
          "input2_key": "H",
          "input2_value": 1331811.8770273703
        }
      },
      {
        "id": "if97_length_500",
        "backend": "if97",
        "length_m": 0.5,
        "total_power_W": 312500.0,
        "mass_flow_kg_s": 6.590836181503523,
        "enthalpy_rise_J_kg": 47414.31760616321,
        "arguments": {
          "fluid": "IF97::Water",
          "input1_key": "P",
          "input1_value": 15500000,
          "input2_key": "H",
          "input2_value": 1331580.7778922976
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      },
      {
        "id": "heos_length_1000",
        "backend": "heos",
        "length_m": 1.0,
        "total_power_W": 625000.0,
        "mass_flow_kg_s": 6.590836181503523,
        "enthalpy_rise_J_kg": 94828.63521232642,
        "arguments": {
          "fluid": "Water",
          "input1_key": "P",
          "input1_value": 15500000,
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      },
      {
        "id": "if97_length_1000",
        "backend": "if97",
        "length_m": 1.0,
        "total_power_W": 625000.0,
        "mass_flow_kg_s": 6.590836181503523,
        "enthalpy_rise_J_kg": 94828.63521232642,
        "arguments": {
          "fluid": "IF97::Water",
          "input1_key": "P",
          "input1_value": 15500000,
          "input2_key": "H",
          "input2_value": 1378995.0954984608
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      },
      {
        "id": "heos_length_1500",
        "backend": "heos",
        "length_m": 1.5,
        "total_power_W": 937500.0,
        "mass_flow_kg_s": 6.590836181503523,
        "enthalpy_rise_J_kg": 142242.95281848963,
        "arguments": {
          "fluid": "Water",
          "input1_key": "P",
          "input1_value": 15500000,
          "input2_key": "H",
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      },
      {
        "id": "if97_length_1500",
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        "arguments": {
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          "input1_value": 15500000,
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          "input2_value": 1426409.413104624
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    ],
    "limits": [
      "Global mixing/enthalpy accounting only. No local flow redistribution, surface temperatures, rod contact, grid losses, pressure drop, boiling onset or CHF.",
      "Same library with different HEOS/IF97 formulations is a consistency comparison, not independent experimental validation.",
      "Only bowed-rod linear power is supplied; other rods/length/enclosure are unaccepted proposals.",
      "A subcooled bulk estimate cannot establish local single-phase flow or DNBR applicability."
    ]
  },
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      "outlet_temperature_K": 572.0388074717588,
      "outlet_temperature_degC": 298.8888074717588,
      "saturation_temperature_degC": 344.78941524101106,
      "bulk_subcooling_K": 45.90060776925225,
      "equilibrium_enthalpy_quality": -0.3084828707786964,
      "actual_vapor_quality": null,
      "phase": "liquid",
      "artifact_path": "qualification/water-basis-r1/heos_length_500.json",
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      "outlet_temperature_degC": 298.89657213612657,
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      "bulk_subcooling_K": 45.89497946742256,
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      "phase": "liquid",
      "artifact_path": "qualification/water-basis-r1/if97_length_500.json",
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      "total_power_W": 625000.0,
      "mass_flow_kg_s": 6.590836181503523,
      "enthalpy_rise_J_kg": 94828.63521232642,
      "outlet_temperature_K": 580.5960009868957,
      "outlet_temperature_degC": 307.4460009868957,
      "saturation_temperature_degC": 344.78941524101106,
      "bulk_subcooling_K": 37.34341425411537,
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      "phase": "liquid",
      "artifact_path": "qualification/water-basis-r1/heos_length_1000.json",
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      "enthalpy_rise_J_kg": 94828.63521232642,
      "outlet_temperature_K": 580.608162347896,
      "outlet_temperature_degC": 307.45816234789606,
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      "bulk_subcooling_K": 37.33338925565306,
      "equilibrium_enthalpy_quality": -0.2595860102534558,
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      "artifact_path": "qualification/water-basis-r1/if97_length_1000.json",
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      "outlet_temperature_K": 588.7759686910199,
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      "length_m": 0.5,
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    {
      "length_m": 1,
      "IF97_minus_HEOS_outlet_temperature_K": 0.012161361000380566
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      "length_m": 1.5,
      "IF97_minus_HEOS_outlet_temperature_K": 0.011643516678077503
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  ],
  "reused_HEOS_saturation": "evidence/coolprop-runtime-saturation-r1.json",
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  "native_spatial_solver_runs": 0,
  "provider": "Unchanged JerryMansikkaviita/CoolpropMCP 6e446f0f57b3e88716bbed92adb0495af32a44c9; CoolProp 8.0.0",
  "observation_limits": [
    "Required T/P/density/enthalpy fields are finite; null optional IF97 compressibility factor remains null.",
    "Native vapor quality is undefined/null in these single-phase states. The negative equilibrium enthalpy coordinate is not a negative vapor mass fraction.",
    "HEOS/IF97 agreement in one library is formulation consistency, not independent experimental validation.",
    "A subcooled bundle-average state does not establish local subchannel states, wall boiling, heat transfer coefficient, contact/grid effects or CHF applicability.",
    "Other-rod power, span, enclosure, constant pressure and adiabatic steady energy assumptions are proposals.",
    "No local flow field or heat-transfer correlation was implemented. Existing solver properties and native CHF method remain unresolved."
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  "method_implication": "Consider supported pre-CHF/subcooled methods; do not require a full two-phase spatial simulation solely because DNBR is requested. Selection still requires an existing applicable CHF implementation, compatible local fields and a relevant contact/bow/grid benchmark with uncertainty.",
  "checkpoints": {
    "A": "Not submitted/accepted",
    "B": "Not accepted",
    "C": "Not accepted"
  },
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  "public_release": false
}