Challenges Associated with the Mitigation of Unprotected Loss of Flow in Sodium-Cooled Fast Reactor Cores
Abstract
Reactivity effects associated with the mitigation of
unprotected loss of flow in sodium fast reactors are being
studied to find ways to reduce the potential release of
mechanical energy.
The studies performed with ERANOS illustrate the
importance of cladding removal as well as radial leakage
changes during the core slumpdown. Possible arrangements
and dispositions are envisioned that would
avoid recriticality and hence the possibility of going into
severe power excursions.
Challenges to be faced by safety studies that would
ascertain that no cliff-edge effects occur are then listed.