RELAP5/MOD3.3 Analysis of the Loss of External Power Event with Safety Injection Actuation

<table class="fixed-width table-group" id="tab3"><tr><td><table class="table"><colgroup><col style="width:34.21em"/><col style="width:8.19em"/></colgroup><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Scenario</td><td class="align_center">Name</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Base case (assuming above initial and boundary conditions)</td><td class="align_center">Base</td></tr><tr><td class="align_left">Base case without assuming influence of turbine-generator frequency on RCP flow</td><td class="align_center">w/o frequency</td></tr><tr><td class="align_left">Base case without disabled rate sensitive pressurizer PORV opening</td><td class="align_center">With PRZ PORV</td></tr><tr><td class="align_left">Base case without assuming any boration</td><td class="align_center">w/o boration</td></tr><tr><td class="align_left">Base case (assuming main feedwater system in automatic mode)</td><td class="align_center">w/o operator FW</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Scenarios simulated by RELAP5 in the first step (till SI injection signal actuation).</div>

Science and Technology of Nuclear Installations

tab3

Table 3

Table 3: RELAP5/MOD3.3 Analysis of the Loss of External Power Event with Safety Injection Actuation 