Query "node", "way" and "relation" elements with "generator:source" key and "nuclear" value:
(node["generator:source"="nuclear"];
way["generator:source"="nuclear"];
relation["generator:source"="nuclear"];
node["plant:source"="nuclear"];
way["plant:source"="nuclear"];
relation["plant:source"="nuclear"];)
Query 'relation' elements with 'power' key and 'plant' tag or 'station' tag:
(node[power=plant];
node[power=station];
way[power=plant];
way[power=station];
relation[power=plant];
relation[power=station];)
Example:
Relation: Centrale hydroélectrique de Veytaux 1 (7251087).
See https://www.openstreetmap.org/relation/7251087#map=13/46.4175/6.9874.
germainaugsburger