Symbol 2401 from ISO 7000 - Title/Meaning: Protect from radioactive sources Function/description: To indicate that the contents of the transport package can deteriorate or be rendered unusable by ionizing radiation and shall therefore be protected from ionizing radiation.
pay attention to orientation of symbolAdditional information: 
This symbol was revised on 2014-06-05
This symbol should be used in the orientation shown
Own work using: iso.org/obp/graphics/grs/0dc13ce3-283b-4d1c-bf7b-b027c87e1e04 200.png
Vectorization:  Mrmw