` Jedrski reaktor` načeloma obsega postavke, ki so znotraj reaktorske posode ali so z njo neposredno spojene, opremo, ki nadzira raven moči v sredici, in sestavne dele, ki običajno vsebujejo primarno hladilo reaktorske sredice ali so v neposrednem stiku z njim ali pa ga nadzirajo.
A ` nuclear reactor` basically includes the items within or attached directly to the reactor vessel, the equipment which controls the level of power in the core, and the components which normally contain or come in direct contact with or control the primary coolant of the reactor core.