2013 saw successful launch of Mars Orbiter Mission

The successful launch of Mars Orbiter Mission and power generation from Kudankulam nuclear power plant were some of the major achievements in the field of space and atomic energy in 2013.
ISRO, which comes under the Department of Space (DoS), achieved a major feat by launching the Mars Mission in November, an exercise undertaken only by a handful countries.
Launched from Satish Dhawan Space Centre at Sriharikota, the MOM on December 4 escaped earth's sphere of influence and is now on a course to encounter Mars after a journey of about 300 days.
The Rs 450-crore project would provide the scientific community better opportunities in planetary research.

Apart from it, ISRO also launched oceanographic satellite SARAL, a joint Indo-French Satellite programme, advanced weather satellite INSAT-3D, advanced multi-band communication satellite, GSAT-7.
However, a major setback for ISRO was calling off the launch of GSLV-D5 after a leak was observed in the UH25 fuel system of the liquid second stage just two hours before the scheduled lift-off.
ISRO was criticised by many in the scientific community in India and abroad for prioritising MOM over GSLV-D5.
The Department of Atomic Energy's pursuit in generating nuclear power got a boost when the first unit of Kudankulam plant started generating power in October. The 1000 MW unit 1 of KKNPP is currently the largest nuclear power generation plant in the country.