There is no uncertainty at all that there are huge quantities of long-lived radioactives in the deep Earth.

The neutrino flux from the uranium and thorium chains have been measured (by Borexino and KamLAND) as totaling around 24 TW thermal energy (out of a total around 44 TW). Potasium is unmeasured but significant.

These same measurements have strongly ruled out a central reactor model of the Earth (though I've read a arXiv posting proposing some valients for which I have not seen calculations).

Furthermore the natural radioactivity of the Earth typically contributes roughly one quarter of the basic background radiation dose that we are all getting all the time (mean is about 1 mrem per day). Potasium 40 is common in many building materials and in high potassium food such as bananas, carbon 14 is ubiquitus in the biosphere, and radon outgrassing can contribute more than cosmic rays in a improperly vented structure over granite formation (which can be so deep the residents aren't ware of them).

There is no uncertainty at all that there are huge quantities of long-lived radioactives in the deep Earth.

The neutrino flux from the uranium and thorium chains have been measured (by Borexino and KamLAND) as totalling around 24 TW thermal energy (out of a total around 44 TW). Potassium is unmeasured but significant.

These same measurements have strongly ruled out a central reactor model of the Earth (though I've read a arXiv posting proposing some valients for which I have not seen calculations).

Furthermore the natural radioactivity of the Earth typically contributes roughly one quarter of the basic background radiation dose that we are all getting all the time (mean is about 1 mrem per day). Potassium 40 is common in many building materials and in high potassium food such as bananas, carbon 14 is ubiquitous in the biosphere, and radon outgrassing can contribute more than cosmic rays in a improperly vented structure over granite formation (which can be so deep the residents aren't ware of them).

There is no uncertainty at all that there are huge quantities of long-lived radioactives in the deep Earth.

The neutrino flux from the uranium and thorium chains have been measured (by Borexino and KamLAND) as totaling around 24 TW thermal energy. Potasium is unmeasured but significant.

These same measurements have strongly ruled out a central reactor model of the Earth (though I've read a arXiv posting proposing some valients for which I have not seen calculations).

There is no uncertainty at all that there are huge quantities of long-lived radioactives in the deep Earth.

The neutrino flux from the uranium and thorium chains have been measured (by Borexino and KamLAND) as totaling around 24 TW thermal energy (out of a total around 44 TW). Potasium is unmeasured but significant.

These same measurements have strongly ruled out a central reactor model of the Earth (though I've read a arXiv posting proposing some valients for which I have not seen calculations).

Furthermore the natural radioactivity of the Earth typically contributes roughly one quarter of the basic background radiation dose that we are all getting all the time (mean is about 1 mrem per day). Potasium 40 is common in many building materials and in high potassium food such as bananas, carbon 14 is ubiquitus in the biosphere, and radon outgrassing can contribute more than cosmic rays in a improperly vented structure over granite formation (which can be so deep the residents aren't ware of them).