Mafia 37. Haven of Evil.

Here's what I found on Wikipedia: Thoriated cathodes are used in electron tubes, while oxide-thoriated cathodes are used in magnetrons and high-power generator tubes. Adding 0.8–1% ThO2 to tungsten stabilizes the structure of incandescent lamp filaments. Xenon arc lamps almost always have thoriated cathodes and anodes, so they are slightly radioactive. Thorium oxide is used as a resistance element in high-temperature furnaces. Added after 58 seconds Do you think that's not enough?