@A66 Without your full model and a better explanation, it’s not really possible to say what’s wrong with your code. If you’re able to attach a full script, that would allow someone to take a look at the full calculation. Also, you need to provide more information on why you believe the value is “wrong”. With no context, I can’t tell why a source at a given location should produce a low/high dose rate.
If you can look it I will share all my code with you as a message