Life supported by radiation from the accretion disk of a black hole

[ShayanJ]

For a planet to be able to support life, it needs to have a source of energy. In our case this energy comes from the sun.
But in this paper, the author argues that a rogue planet (a planet that has been ejected from its stellar system and no longer orbits any star and is wandering in interstellar space) can support life using the heat coming from the active core of the planet.
And in this paper, the author argues that a planet orbiting a black hole could support life using the energy from the CMB and using the black hole as a way of disposing of the high entropy energy (which is the total opposite of our case).
But could the radiation from the accretion disk of a black hole provide enough energy for a planet to support life? Wouldn't there be a huge amount of hazardous radiation from the accretion disk?
Thanks

 

[Ibix]

I've only had the chance to skim the paper, but they seem to say that the sky is divided into two parts - the CMB and the black hole. That means, implicitly, that the black hole does not have an accretion disc - i.e. a more or less isolated black hole. That's certainly not problematic for a theoretical exercise, although finding and reaching an isolated black hole would present significant practical problems.

An accretion disc would yield a lot of hard radiation, yes.