Influence of Modelling Options in RELAP5/SCDAPSIM and MAAP4 Computer Codes on Core Melt Progression and Reactor Pressure Vessel Integrity

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td align="left">Material</td><td align="left">UO<sub>2</sub> [kg]</td><td align="left">ZrO<sub>2</sub> [kg]</td><td align="left">Zr [kg]</td><td align="left">Stainless steel [kg]</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td align="left">RELAP5/SCDAPSIM</td><td align="left">22800</td><td align="left">3100</td><td align="left">2200</td><td align="left">3000</td></tr><tr><td align="left">MAAP4</td><td align="left">120</td><td align="left">320</td><td align="left">220</td><td align="left">0</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Composition of molten material in the reactor vessel lower head, Group 1.

Science and Technology of Nuclear Installations

tab2

Table 2

Table 2: Influence of Modelling Options in RELAP5/SCDAPSIM and MAAP4 Computer Codes on Core Melt Progression and Reactor Pressure Vessel Integrity 