The primary coolant enters the pressure vessel through two 16-in. (40.64-cm)-diameter pipes above the core, passes through the core, and exits through an 18-in. (45.72-cm)-diameter pipe beneath the core. The flow rate is approximately 16,000 gpm (1.01 m3/s), of which approximately 13,000 gpm (0.82 m3/s) flows through the fuel region. The remainder flows through the target, reflector, and control regions. The system is designed to operate at a nominal inlet pressure of 468 psig (3.33 x 106 Pa). Under these conditions the inlet coolant temperature is 120 °F (49 °C), the corresponding exit temperature is 156 °F (69 °C), and the pressure drop through the core is about 110 psi (7.58 x 105 Pa).