Polonium behavior following a vacuum window rupture in a lead-bismuth eutectic based accelerator driven system

被引：4

作者：

Karlsson, Erik ^{[1
,2
]}

Neuhausen, Joerg ^{[1
]}

Aerts, Alexander ^{[3
]}

Danilov, Ivan I. ^{[1
,2
]}

Eichler, Robert ^{[1
,2
]}

Tuerler, Andreas ^{[2
]}

Voegele, Alexander ^{[1
]}

机构：

[1] Paul Scherrer Inst, Forschungsstr 111, CH-5232 Villigen, Switzerland

[2] Univ Bern, Freiestr 3, CH-3012 Bern, Switzerland

[3] SCK CEN, Boeretang 200, B-2400 Mol, Belgium

来源：

APPLIED RADIATION AND ISOTOPES | 2021年 / 168卷

关键词：

Accelerator driven system; Polonium; Lead-bismuth eutectic; Stainless steel; Transmutation; Vacuum; Thermochromatography; Adsorption; EVAPORATION;

D O I：

10.1016/j.apradiso.2020.109551

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Accelerator driven fast nuclear reactors cooled by lead-bismuth eutectic (LBE) are developed for transmuting long-lived radionuclides in spent nuclear fuel. Due to the nature of the coolant, operating the reactor will result in a production of Po-210 by neutron capture. Understanding the behavior of this highly radiotoxic nuclide in the event of a failure of the window separating the evacuated proton beam guide from the reactor core is required for safety assessments. The present work aims at acquiring this knowledge by studying the evaporation of polonium from neutron-irradiated LBE and its deposition in a scaled down model of the beam tube. Experimental results along with Monte Carlo simulations indicate that polonium adsorbs as a single species with an adsorption enthalpy of approximately -156 kJ/mol.

引用

页数：7

共 25 条

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