Wiki has a few examples of such systems&#x2F;designs: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Passive_nuclear_safety#Examples_of_passive_safety_in_operation" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Passive_nuclear_safety#Example...</a>