Final answer:
The NRC guidelines from 1989 refer to the guidelines published by the United States Nuclear Regulatory Commission covering various aspects related to nuclear power and radiation safety.
Step-by-step explanation:
The NRC guidelines from 1989 refer to the guidelines published by the United States Nuclear Regulatory Commission. These guidelines cover various aspects related to nuclear power and radiation safety. Some of the topics included in the guidelines may include risk assessment, federal guidance programs, protective action guides, and effects of radiation.