Chemical Forms of Important Fission Products in Primary Circuit of HTR-PM under Conditions of Normal Operation and Overpressure and Water Ingress Accidents: A Study with a Chemical Thermodynamics Approach

Table 1

Design parameters of HTR-PM.

Parameter	Data
Thermal power of HTR-PM	250 MW
Temperature of Heat inlet	250°C
Temperature of Heat outlet	750°C
Maximum temperature of fuel element	900°C
Pressure of He in primary circuit	7.0 MPa
Fresh fuel enrichment in the equilibrium core	8.5%
Average residence time of fuel elements in core	1056.8 day
Thermal neutron flux in equilibrium core	6.57 × 10^13 cm^−2s^−1
Resonance neutron flux in equilibrium core	7.68 × 10^13 cm^−2s^−1
Fast neutron flux in equilibrium core	8.98 × 10^12 cm^−2s^−1
Amount of Helium in HTR-PM	3000 kg