炉心

1. Origins, structure, and basic meaning

• Structure: 炉心 is read as ろしん and is a technical reactor noun combining 炉 with 心, the core or center.
• Basic usage: It identifies the core’s position inside a reactor or the location where heat is generated.

2. Common pitfalls and similar expressions

• Nested possession
  • 原子炉の炉心の位置 links the reactor, its core, and the core’s position through successive の phrases.
• Location with で
  • In 炉心で熱が生じる, で marks where heat generation occurs; the word is not a general label for any center.