### Question
What is the definition of commercial nuclear power reactor?


### Answer
The definition of **commercial nuclear power reactor** is as follows in *42 U.S.C. § 2021b*:

> any unit of a civilian light-water moderated utilization facility required to be licensed under section 2133 or 2134(b) of this title

#### Citation:
  - *42 U.S.C. § 2021b*
  - Heading: **CHAPTER 23-DEVELOPMENT AND CONTROL OF ATOMIC ENERGY > Division A-Atomic Energy > SUBCHAPTER I-GENERAL PROVISIONS**

