The worker's death was probably unrelated to the nuclear disaster, but it can't help moral much at the crippled site. Fission and cooling still remain issues at the Fukushima plant. Although fission is not happening to any large degree, or possibly at all, there has been fission more recently...
Claims are being made that the situation at Fukushima is starting to improve, but there is no actual evidence of this. We probably (but not certainly) passed the point where nuclear fuel is likely to accumulate in such a way as to cause a major fission event or explosion, but there is still...