RELAP5 Foresight Thermal-Hydraulic Analysis of Hypothesis Passive Safety Injection System under LOCA for an Existing NPP in China

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Event</td><td class="align_center">Time (s)</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Break occurs</td><td class="align_center">0.0</td></tr><tr><td class="align_left">Reactor trip signal</td><td class="align_center">40.0</td></tr><tr><td class="align_left">“S” signal</td><td class="align_center">44.0</td></tr><tr><td class="align_left">RCPs begin to coast down</td><td class="align_center">49.0</td></tr><tr><td class="align_left">ACC injection begins</td><td class="align_center">888.0</td></tr><tr><td class="align_left">ACC-1 empties</td><td class="align_center">1826.0</td></tr><tr><td class="align_left">ACC-2 empties</td><td class="align_center">1828.0</td></tr><tr><td class="align_left">ADS stage 1</td><td class="align_center">64.0</td></tr><tr><td class="align_left">ADS stage 2</td><td class="align_center">1016.0</td></tr><tr><td class="align_left">CMT-1 empties</td><td class="align_center">1804.0</td></tr><tr><td class="align_left">CMT-2 empties</td><td class="align_center">1792.0</td></tr><tr><td class="align_left">HET injection begins</td><td class="align_center">1904.0</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>2-inch SBLOCA transient sequence of the accident.</div>

Science and Technology of Nuclear Installations

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Table 4

Table 4: RELAP5 Foresight Thermal-Hydraulic Analysis of Hypothesis Passive Safety Injection System under LOCA for an Existing NPP in China 