Chemical Forms of Important Fission Products in Primary Circuit of HTR-PM under Conditions of Normal Operation and Overpressure and Water Ingress Accidents: A Study with a Chemical Thermodynamics Approach

<table class="fixed-width table-group" id="tab3"><tr><td><table class="table"><colgroup><col style="width:8.97em"/><col style="width:12.17em"/><col style="width:14.21em"/></colgroup><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Species of impurity</td><td class="align_center">Quality proportion (vppm)</td><td class="align_center">Total amount in HTR-PM (mol)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">H<sub>2</sub></td><td class="align_center">7</td><td class="align_center">0.00525</td></tr><tr><td class="align_left" colspan="3"><hr/></td></tr><tr><td class="align_left">H<sub>2</sub>O</td><td class="align_center">1</td><td class="align_center">0.0075</td></tr><tr><td class="align_left" colspan="3"><hr/></td></tr><tr><td class="align_left">CO</td><td class="align_center">7</td><td class="align_center">0.00525</td></tr><tr><td class="align_left" colspan="3"><hr/></td></tr><tr><td class="align_left">CO<sub>2</sub></td><td class="align_center">1</td><td class="align_center">0.0075</td></tr><tr><td class="align_left" colspan="3"><hr/></td></tr><tr><td class="align_left">CH<sub>4</sub></td><td class="align_center">3</td><td class="align_center">0.00225</td></tr><tr><td class="align_left" colspan="3"><hr/></td></tr><tr><td class="align_left">N<sub>2</sub></td><td class="align_center">2</td><td class="align_center">0.0015</td></tr><tr><td class="align_left" colspan="3"><hr/></td></tr><tr><td class="align_left">O<sub>2</sub></td><td class="align_center">1</td><td class="align_center">0.00075</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Parameters of gas impurities in Helium (industrial quality follows Chinese National Standard GB/T 4884).</div>

Science and Technology of Nuclear Installations

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Table 3

Table 3: Chemical Forms of Important Fission Products in Primary Circuit of HTR-PM under Conditions of Normal Operation and Overpressure and Water Ingress Accidents: A Study with a Chemical Thermodynamics Approach 

Table 3 | Chemical Forms of Important Fission Products in Primary Circuit of HTR-PM under Conditions of Normal Operation and Overpressure and Water Ingress Accidents: A Study with a Chemical Thermodynamics Approach 