Static Pressure Requirement (\( P_s \)):

\[ P_s = H_r \cdot \delta_s \]

Where:

• \( P_s \) is the static pressure requirement in the fuel bed, in centimeters of water (cm H2O).
• \( H_r \) is the reactor height, in meters (m).
• \( \delta_s \) is the specific draft, in centimeters of water per meter depth of fuel (cm H2O/m).