In-vessel Steam Explosion
Simulation
Introduction:
This is a numerical
simulation of the In-vessel steam explosion with the computer codes PM-ALPHA.L
and ESPROSE.m
The premixing transient is the
simulation of the mixing of molten fuel with water at the bottom of the reactor
vessel
(generated by PM-ALPHA.L)
The explosion is the
simulation of the pressure wave in the vessel when the premixture is triggered
at a specific location as shown
(generated by ESPROSE.m)
1. C2-case, d = 2cm, breakup parameter = 30, Saturated Pool
2. C2-case, d = 2cm, breakup parameter = 30, 10 C subcooling
2a. Explosion of case 2 premixture at 0.49 seconds
Triggering location and initial premixture
af = minimum void fraction required for fragmentation to
occur
Xc = Condensation factor (higher Xc,
faster the condensation rate)
Maximum
pressure for different af
with Xc = 0.25 (norminal value)
Maximum pressure for different Xc
with af = 0.05 (norminal value)
3. C2-case, d = 2cm, breakup parameter = 30, 20 C subcooling
Premixing
Transient
4a. C2-case, d = 2cm, breakup
parameter = 30, 30 C subcooling
Premixing
Transient
4b. C2-case, d = 2cm, breakup
parameter = 30, 30 C subcooling (boiling/condensation turned off)