modelReactivityFeedbacks
This module calculates the neutronic feedback due to control rods, Doppler effect, moderator temperature,
boron and xenon concentration
Information
## Copyright © EDF 2002 - 2026 ## ThermoSysPro Version 4.2
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Reactivity Coefficients | |||
| Real | alfa_dop | -3 | Doppler coefficient (pcm/K) |
| Real | alfa_mod | -30 | Moderator Coefficient (pcm/K) |
| Real | kxe | -3.e-20 | Xenon Coefficient |
| Real | kB | -10 | Soluble Poison (Boron) Coefficient (pcm/ppm) |
| Reference State | |||
| Boolean | steady_state | true | |
| ThermoSysPro.Units.SI.Temperature | Tref_mod | 585.45 | Moderator Reference Temperature |
| ThermoSysPro.Units.SI.Temperature | Tref_fuel | fuel effective reference temperature (K) | |
| Real | ReacFuel | Reference Reactivity of Fuel | |
| Control Rods Parameters | |||
| Integer | n_rods | 2 | Number of Control Rods |
| Real | rod_stroke | 100 | Rod Stroke in the core (in steps, cm...) |
| Real[n_rods] | RodsPos0 | {10, 0} | Control rods initial position (0 -> completely extracted from the core) |
| Boolean | constant_rodWorth | true | Whether to use constant rod worths or tables |
| Real[n_rods] | rodWorth | {-10, -4} | Rod worth (pcm/step) |
| Integer | rod_nodes | 10 | Number of sections in the rod worth tables |
| Real[rod_nodes + 3] | Z_rodNodes | {i*rod_stroke/rod_nodes for i in -1:rod_nodes + 1} | Z of rodworth sections |
| Real[n_rods,rod_nodes + 3] | rodWorth_tab | {{0, 0, 5, 9, 12, 14, 15, 14, 12, 9, 5, 0, 0}, {0, 0, 3, 6, 8, 9, 9.5, 9, 8, 6, 3, 0, 0}} | Rod Worth of as a function of Z (see Z_rodNodes) |
| Real[n_rods,rod_nodes + 3] | cumRodWorth | {ThermoSysPro.Functions.CumulativeIntegral(rod_nodes + 3, Z_rodNodes, rodWorth_tab[i]) for i in 1:n_rods} | Rod Worth of as a function of Z (see Z_rodNodes) |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| ThermoSysPro.InstrumentationAndControl.Connectors.OutputReal | SortieReac | ||
| ThermoSysPro.InstrumentationAndControl.Connectors.InputReal | EntreeCbore | ||
| ThermoSysPro.InstrumentationAndControl.Connectors.InputReal | EntreeT_CoreAv | ||
| ThermoSysPro.InstrumentationAndControl.Connectors.InputReal | EntreeT_fuel | ||
| ThermoSysPro.InstrumentationAndControl.Connectors.InputReal[n_rods] | RodsSpeeds | ||
| ThermoSysPro.InstrumentationAndControl.Connectors.InputReal | EntreeCxenon |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Real[n_rods] | RodsPos | Position of groups (steps) | |
| Real[n_rods] | RodsSpeedsValue | Velocity of rods groups (insertion in step/min) | |
| Real | T_fuel | Fuel effective temperature (K) | |
| Real | T_CoreAv | Average temperature of the moderator in the core (K) | |
| Real | Cbore | Concentration of the boron | |
| Real | Cxenon | Concentration of the xénon | |
| Real | Reac | Total reactivity (pcm) | |
| Real | ReacP | Reactivity given by soluble poison, i.e. Boron (pcm) | |
| Real | ReacB | Reactivity given by the control bars (pcm) | |
| Real[n_rods] | ReacBi | Reactivity given by the control bars (pcm) | |
| Real | ReacD | Reactivity given by the Doppler effect (fuel temperature) (pcm) | |
| Real | ReacM | Reactivity given by the moderator effect (pcm) | |
| Real | ReacX | Reactivity given by the Xenon (pcm) |