STORM Project

The objective of the proposed scoping test in the EPICUR facility is to better understand iodine behavior and especially formation of volatile iodine in iPWR accident conditions. This comprises experimentally observed phenomena as well as the capability of severe accident simulation codes to cope with SMR/iPWR-specific issues. The project shall be performed based on input received from the SASPAM-SA project about iPWR accident conditions and shall provide feedback in return.

Cesium iodide (CsI) is proposed as basic material. Its possible conversion to volatile species shall be investigated at the EPICUR facility with an experimental setup as used in the current OECD ESTER project. The experiment shall be performed at representative temperatures, in a reducing, H2-containing atmosphere under irradiation and with a duration that allows to transpose the experimental conditions to an accident scenario.

The absence of steam is chosen to enable the study of phenomena (here especially the influence of a reducing atmosphere) in comparison with tests from the STEM project (AER-2 test) to avoid too complex phenomena. It could nevertheless be worthwhile to keep a similar test, but with a certain humidity level, in mind for a follow-up test/project.

Graph will follow after data evaluation

To be awaited, test is scheduled 17-19 Nov 2025

To be decided after the test by ASNR and FRA-G

To be further elaborated

Mainly participants from SASPAM-SA project and institutions within that project, but also any other organization interested in PWR- or BWR-like SMR‘s