Hazard Identification and Risk Assessment of New Plate Mill and Assessment of Water Quality in Scholars Avenue Zone of NIT Rourkela

Abstract

Hazards are pervasive in every steel plant atmosphere and keen awareness and stress on safety is an obligatory priority for each and every industry. A acute part0of any type of safety and0health releted program is the0identification, assessment, 0elimination, substitution and/or control0of hazards in the place of work. It is very difficult to0eliminate all the hazards, hence the0goal is to abolish and/or control the0hazards with acute and high potential and to lessen the rest of the0hazards up to the0lowest possible risk0level in order to safeguard employees from detriment. In this report HIRA was conducted in New Plate Mill of Rourkela Steel Plant. Rolling process is a complex task, it has potential hazards like mix gas (CO+BF) used for heating the furnace, slab handling with cranes, physical gas burner valve closing, furnace shut down and light up etc. and risk assessment of these potential hazards are being done to calculate the risk score by taking the probability , exposure and severity as parameters. Risk priority number/risk score, severity level, early detection of hazard, occurrence are the important factors determined in this work are generally utilized to make suggestion for the safety precautions. Risk score helps to find out the highest hazardous activities which need more attention than the other activities. Safety precautions and additional measures suggested in this project report may prevent the happening of failures and protect the rolling mill employees from disastrous accidents and injuries and ultimately prevents property damage.
Water is the most necessary and precious thing on the earth without which life is impossible. Thus, it is essential to analyse and assess the quality of drinking water for assessing health and hygiene safety. This study evaluates the quality parameters of drinking water available to students of National Institute of Technology Rourkela. The assessment was carried out by evaluating physicochemical characteristics as well as microbial analysis of tap water and filtered water collected at random. The water samples were collected from all halls of residence of NIT Rourkela on simple random sampling basis from two sources vig. tap water (used for general purpose) and filtered water (used for drinking purpose (n = 16). Both physicochemical characterization and microbial analysis were carried out for each sample as per BIS standards. For microbial analysis the samples were collected in sterile containers. The physicochemical characteristics have been carried out with respect to pH value, DO content, TDS content, alkalinity and chloride content. Metal constituents such as Fe, Mn, Pb, Cu and Zn are determined by using AAS(atomic absorption spectrometer). The chloride content was found to be maximum in tap water of SD hall i.e. 110 mg/l. The samples collected from filtered water were found to be within desirable limits but are significantly better than the tap water samples with respect to parameters of physiochemical characteristics. However in case of microbial analysis, the filtered water shows high CFUs per 100 ml of each sample beyond permissible limit. In some filtered water samples, the CFUs count was in fact higher than the tap water samples which might suggest improper cleaning. From staining it was found that gram positive species are dominant in water samples.