Final answer:
HARP stands for Hazardous Areas Radiographic Protection, and it provides safety guidelines for X-ray usage, aligning with safety code 30.
Step-by-step explanation:
The acronym HARP stands for Hazardous Areas Radiographic Protection. The purpose of HARP is to establish safety guidelines for the use of X-ray equipment to protect people and the environment from the potential hazards of radiation in areas where radiographic equipment is used. As for safety code 30 among the options provided, the correct answer is option a, which outlines the guidelines for the safe usage of X-ray equipment.