Moderator Temperature Coefficient Calculator
Reactor thermal hydraulics & safety: Calculate the Moderator Temperature Coefficient ($\alpha_M = d\rho / dT_{\text{mod}}$ in $\text{pcm/}^\circ\text{C}$), water expansion density feedback, and soluble boron chemical shim concentration effects.
Primary Coolant & Soluble Boron
Standard PWR operating T_avg: ~295–310 °C
Beginning of cycle: 1200–1800 ppm; EOC: ~10 ppm
Core Cycle Stage & Operating Pressure
Standard PWR pressure: 15.5 MPa (2250 psia)
MTC Reactivity Coefficient Output
Moderator Temp Coefficient (MTC):
--
pcm / °C (dρ / dT)
Water Density Derivative dρ_w/dT:
--
kg / (m³·°C) thermal expansion
Boron MTC Positive Offset:
--
pcm / °C shifted toward positive
Moderator Water Density:
--
kg / m³ at operating pressure
| Base Clean Water MTC (Zero Boron): | -- |
| Critical Boron Concentration for Zero MTC: | -- |
| Reactivity Insertion for +5 °C Excursion: | -- |
| Technical Specifications Compliance: | -- |
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