If you got 98.6 percentile, then your CRL rank would be in the range 14,000 - 16,000. With this score your EWS category rank would be 2,100 - 2,500.

Yes, you can get Computer Science and Engineering in NIT Durgapur. Last year, the closing rank (EWS category) for Computer Science was 4856, so surely you can get CSE in NIT Durgapur.

To have complete list of all the institutes which you can get based upon your score, you can use the following link :

Good Luck !