Hello Aspirant!

 For UPES Dehradun a rank upto 8000 is good enough. 

Since it is a private university, it has been observed that if there are vacant seats available then ranks for admissions have been stretched to 10000 and sometimes 15000 as well.

Considering your rank and these trends you have less chances of admission in it since there is a huge difference in your rank and expected admission rank.

For more details you can contact their admission forums through their official websites.

All the best!