Organization / Localization: Japan Atomic Energy Agency (JAEA) Facility Description: It consists of a high-frequency induction furnace,
an electric resistance furnace, and a
thermal gradient tube (TGT), aerosol spectrometer, and gas
trapping system. Test Identification: TeRRa-RBS-1
TeRRa-RBS-2
TeRRa CsIMo-1
TeRRa CsIMo-2 SA-Related Topics / Phenomena:Cesium
and iodine revaporization from cesium iodide (CsI) deposits on
stainless steel
Impact of molybdenum as a semi-volatile FP toward iodine speciation in the gas phase. Measured Parameters: Temperature, compound identification with XRD and Raman spectroscopy, concentrations of Cs, I and B, morpholofy of deposits. Modelling: Steam-boron (addition of B2O3 powder) and steam effect, presence or not of alumina, temperature range of TGT 1000-400K
Molar ratio Mo/Cs Simulation Code: Not found Experimental Research Program: JAEA and VTT under the support of the Academy of Finland
(grant number 294995) Link to PIRT: RCS chemistry and transport of FPs: ST12, ST13, ST14, ST15, ST18
References: [1] M. Rizaal et al., Revaporization Behavior of Cesium and Iodine Compounds from Their Deposits in the Steam-Boron Atmosphere. ACS Omega 48. p. 32695-32708, 2021
[2] M. Rizaal et al., Impact of molybdenum on iodine chemistry during fission product transport phenomenology, Annals of Nuclear Energy, 218, 111433, 2025, https://doi.org/10.1016/j.anucene.2025.111433
Implemented as part of the Seaknot EU funded project (HORIZON-EURATOM-2021-NRT-01 under Grant Agreement No. 101060327) - WP2.6 UNIPI (2024-2026)