Page 101 - Thermal Hydraulics Aspects of Liquid Metal Cooled Nuclear Reactors

Rod bundle and pool-type experiments in water serving liquid metal reactors 75

3.1.4.2 MYRRHABELLE water model

The MYRRHABELLE water model is a full Plexiglass model at a scale 1/5 of the
design version 1.2 of MYRRHA primary circuit (MYRRHABELLE ¼ MYRRHA
Basic SEt-up for Liquid FLow Experiments; Spaccapaniccia et al., 2015). The model
has been designed and constructed at the von Karman Institute.
It follows the in-vessel design of MYRRHA and combines the lower plenum and
the upper plenum with the diaphragm separating the two plenums (Fig. 3.1.12A). It is
equipped with 16 electrical heaters to simulate the core (maximum heating capacity
of 48 kW), with the two pumps immersed like in the MYRRHA design and with four
water-cooled heat exchangers present the upper plenum (cooling capacity of 12 kW

Fig. 3.1.12 (A) Overall dimension of the model. (B) Upper plenum of MYRRHABELLE.