score:3
A 1,5 km walk should be quite safe. But if this does not feel comfortable for you, there should be taxi's available in the railway station : http://www.belgianrail.be/en/stations-and-train/search-a-station/4/leuven.aspx and there are some buses at night also, depending on the location of your hotel : https://www.delijn.be/en/avond-nachtvervoer/nachtvervoer-leuven.html?vertaling=true