RADIOLYTIC OXIDATION OF RUTHENIUM OXIDE DEPOSITS

被引：14

作者：

Mun, C. ^{[1
]}

Cantrel, L. ^{[1
]}

Madic, C. ^{[2
]}

机构：

[1] CEN Cadarache, IRSN, DPAM, SEMIC,LETR, F-13115 St Paul Les Durance, France

[2] Ctr Etud Saclay, Commissariati Energie Atom, Direct Energie Nucl, F-91191 Gif Sur Yvette, France

来源：

NUCLEAR TECHNOLOGY | 2008年 / 164卷 / 02期

关键词：

ruthenium oxide deposits; radiolytic oxidation; EPICUR irradiator;

D O I：

10.13182/NT08-A4023

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

In the case of a hypothetical severe accident in a nuclear pressurized water reactor, the formation of radiotoxic RuO4(g) may occur in the reactor containment building, resulting from the interactions of ruthenium oxide deposits with the oxidizing medium induced by air radiolysis. Consequently, this gaseous ruthenium tetroxide may be dispersed into the environment; therefore, the determination of the ruthenium deposits behavior is of primary importance for nuclear safety studies. An experimental study, performed by the French Institut de Radioprotection et de Surete Nucleaire (IRSN), using a gamma irradiator cell (EPICUR facility at IRSN/Cadarache) has been carried out in order to obtain experimental data on these interactions. The results showed that radiolytic oxidation of ruthenium oxide deposits leads to the formation of gaseous ruthenium tetroxide to a significant extent. A comparison between the revolatilized Ru fractions obtained experimentally and those obtained by calculations based on the rate laws modeling ozone irradiation effect, established in previous studies, is presented. The disagreement observed is discussed. It appears that the oxidation resulting from air/steam radiolysis products is enhanced in comparison with pure ozone effect.

引用

页码：245 / 254

页数：10

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