By Shishir Roy Chowdhury Raipur, Nov 10 (UNI) A 31-year-old operator in the Steel Melting Shop (SMS) died after coming in contact with molten iron slag at the NMDC''s Nagarnar Integrated Steel Plant (NISP), Chhattisgarh, on Tuesday. The incident has renewed concerns over worker safety, insurance coverage and medical facilities for employees working in hazardous conditions.