Assertion: nuclear reactor's system | /r/Desires | gravity
Facets:
Source sentences:
text: So-called "passive" safety includes systems that rely on natural physics laws such as gravity rather than systems that require mechanical or human intervention.
text: One important distinction is whether the reactors rely on "active" emergency cooling systems (which depend on mechanical equipment and uninterrupted electrical power supplies) or "passive" systems (which rely on gravity or other natural features).