>P32 has a beta max of 1.71 MeV. Ask your collegaue what kind of >hazard a substantial ingestion or inhalation of P32 could do, >internally? Not a hazard? I think not! > The ingestion ALI for P-32 is 600 uCi. IF someone were to ingest something just shy of that, say, 597 uCi, a physician would observe NO adverse effects, although this is a significant ingestion. See NUREG-1535.