Is there a branch change option after first year in NIT Rourkela? If there is what are the conditions?

Yes, there is an option for branch change after the first year at NIT Rourkela. The conditions for branch change vary depending on the specific program and the student's academic performance. Generally, students must attain a CGPA of 8.5 with no backlogs to be eligible for a branch change. 

Here is what the institute has officially declared regarding branch change:

All B. Tech, Int. MSc and BTech- MTech dual degree students who have secured a GPA of 8.5 or more (without any backlog) at the end of the first year are eligible for a branch change given they fulfill the following criteria 

• Change of branch will depend on the availability of vacant seats. Also, the vacancy created in the branch you are changing from should not be more than 5% of the actual existing strength.
• The 5% of vacancy is calculated on the basis of the existing strength. 
• Once you have changed your branch, you cannot go back to your old branch.
• The only criteria for branch change is GPA and in case of a tie in the same, the JEE Main rank will be given preference.

Additionally, students may also be required to participate in an interview or other selection process.