SASPAM-SA: Assessment of existing experimental data in WP3

The HORIZON-EURATOM SAPSAM-SA project, coordinated by ENEA (Italy), was launched in 2022
aiming at investigating the applicability and transfer of knowledge and know-how accumulated on
the operating large-LWR reactors to the iPWRs, in view of the European licensing needs with respect
to severe accident and Emergency Planning Zone (EPZ). Two generic iPWR concepts are considered
in SASPAM-SA: the iPWR Design 1 is characterized by a submerged containment and electric power
of approx. 60 MWe and the iPWR Design 2 of approx. 300 MWe, which employs several passive
systems and a dry containment.
Extensive scientific test programs have been carried out for today's LWRs over the past few decades,
which have contributed to understanding and assessing the phenomena associated with postulated
severe reactor accidents. One of the key objectives of SASPAM-SA is to evaluate the relevance and
applicability of the existing experimental database to iPWR. The emphasis was on SASPAM-SA
Designs 1 and 2, but for specific phenomena, considerations were extended to generic light-water
iPWRs. The applied methodology relies on i) determining the main phenomena to be assessed, ii)
identifying available experimental facilities and data for the identified phenomena, iii) using data
from WP2 for the geometry of Designs 1 and 2, as-well-as for severe accident scenarios and relevant
boundary conditions, iv) comparing the experimental data with the data for iPWR, and v) assessing
the applicability to iPWR analysis.
Based on the review, the applicability of the data for iPWR analysis has been assessed. Experimental
data needs from previous tests, or from new investigations, are identified for phenomena for which
no applicable data are available or for which the database is not sufficient, but are considered of
significant importance for iPWR analysis. This work is conducted in collaboration with the EUSEAKNOT
project. Recommendations for future experimental data needs are given.