Design of the Online Gross <i>γ</i> Monitoring Instrument at the Exit of the Helium Purification System in HTR-PM

<table class="fixed-width table-group" id="tab1"><tr><td><table class="table"><colgroup><col style="width:7.47em"/><col style="width:23.57em"/><col style="width:14.14em"/></colgroup><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left"> </td><td class="align_center">Material parameters</td><td class="align_center">National standards for reference</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Insulating layer</td><td class="align_center">Foam glass</td><td class="align_center">GB/T 4132-1996</td></tr><tr><td class="align_left">Γ detector</td><td class="align_center">NaI(Tl) crystal scintillation detector (Φ50 mm × 50 mm), with a 0.5 mm aluminum layer</td><td class="align_center">-</td></tr><tr><td class="align_left">Lead shield cell</td><td class="align_center">Pb: 96%; Sb:4%</td><td class="align_center">GB/T 1470-2014</td></tr><tr><td class="align_left">Tube wall</td><td class="align_center">321 stainless steel</td><td class="align_center">GB/T 20878-2007</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Material parameters of the monitoring instrument.</div>

Science and Technology of Nuclear Installations

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Table 1

Table 1: Design of the Online Gross <i>γ</i> Monitoring Instrument at the Exit of the Helium Purification System in HTR-PM 

Science and Technology of Nuclear Installations

Design of the Online Gross γ Monitoring Instrument at the Exit of the Helium Purification System in HTR-PM

Table 1