Fig. 1. Nodalization of primary loop system 1. Core, 2. Upper plenum, 3. Broken hot leg, 4,10. Hot leg steam generator shell, 5,11. Cold leg steam generator shell, 6,12. Intermediate leg, 7,13. Cold leg, 8. Downcomer, 9. Unbroken hot leg, 14. Reactor dome

Fig. 2. Nodal division of containment 1. Cavity, 2. Lower compartment, 3. Upper compartment, 4. Annular compartment, 5. External environment

Fig. 3. Flow chart of program calculation

Fig. 4. Flux of reactor primary loop

Fig. 5. Mass of molten material in pressure vessel

Fig. 6. Pressure variation curve of containment

Fig. 7. Mass released from fission product source term in-vessel (a) CORSOR-M model, (b) CORSOR-O model, (c) ORNL-BOOTH model

Fig. 8. Masses released from fission product source terms ex-vessel(a) CORSOR-M model, (b) CORSOR-O model, (c) ORNL-BOOTH model

Fig. 9. Spray-on mass of molten material in pressure vessel

Fig. 10. Spray-on containment pressure change curve

Fig. 11. Spray-off variation curve of suspended iodide CsI

Fig. 12. Spray-on variation curve of suspended iodide CsI

Fig. 13. Spray-on variation curve of deposited iodide CsI

Fig. 14. Spray-off variation curve of fission gas

Fig. 15. Spray-on variation curve of fission gas

Fig. 16. Fraction of decay heat generated by the source term over the total decay heat fraction

Fig. 17. Spray-off decay heat of fission product components (a) CORSOR-M model, (b) CORSOR-O model (c) ORNL-BOOTH model

Fig. 18. Spray-on total decay heat of fission products (color online)