calandria
Noun
Meaning
A form of heat exchanger in which steam is forced past tubes which contain water to be boiled.
A thermosyphon reboiler.
(brewing) A heating element within a brew kettle.
Source: en.wiktionary.orgSynonyms
Anagrams
Examples
Because these rods are inserted into the low-pressure calandria, not the high-pressure fuel tubes, they would not be "ejected" by steam, a design issue for many pressurized-water reactors.
It is also the practical reason for the calandria design, otherwise a very large pressure vessel would be needed.
If this process further weakens the fuel bundles, they will eventually bend far enough to touch the calandria tube, allowing heat to be efficiently transferred into the moderator tank.