What would Jool's radiation belt reach out to?

[GarrisonChisholm]

I've been reading about the Europa Clipper mission, and how it was decided upon instead of an orbiter because the radiation environment would be too hazardous for a ship to handle for any length of time.

Given that Jool is in a 1/10th scale universe, and though KSP does not model radiation hazards, what would a reasonable "safe" altitude for Jool's radiation belt be, if one cared to respect it?  Jupiter's covers Io and Europa, so should Laythe be considered within this zone?

Idle curiosity.  - Have a remarkable weekend my friends!  (First manned Duna landing for my program tonight!  Cross your fingers...)

[Findthepin1]

Considering that Jool is 80 Kerbin masses and Jupiter is about 320 Earth masses, I would say they are on a scale a bit smaller than Saturn's, relatively.