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http://dx.doi.org/10.7731/KIFSE.2019.33.6.105

Experimental Study on the Toxicity Characteristics of Non-Class 1E Cables according to Accelerated Deterioration  

Jang, Eun-Hui (Dept. of Safety Engineering, Incheon National Univ.)
Kim, Min-Ho (Dept. of Safety Engineering, Incheon National Univ.)
Lee, Min Chul (Dept. of Safety Engineering/Fire Disaster Prevention Research Center, Incheon National Univ.)
Lee, Sang-Kyu (Dept. of Reactor System Performance, Korea Institute of Nuclear Safety)
Moon, Young-Seob (Dept. of Reactor System Performance, Korea Institute of Nuclear Safety)
Publication Information
Fire Science and Engineering / v.33, no.6, 2019 , pp. 105-113 More about this Journal
Abstract
This study investigates the toxicity characteristics of two Non-Class 1E Cables (For security reasons, we refer to company A and company B) used in nuclear power plants according to the accelerated deterioration period. In accordance with NES 713 test equipment and standards, tests were carried out on non-aged cables and the cables subjected to 20- and 40-year-accelerated-deterioration; each of the cables was further classified into sheath and insulation. The test results showed that the toxicity indices of 20- and 40-year-accelerated-aged cables were higher than those for the non-aged cables, and 20-year-aged cables of both A and B companies showed the highest toxicity indices. This is attributed to the extensive emissions of carbon monoxide and halide gases such as hydrogen chloride and hydrogen bromide. Furthermore, to analyze the toxicity indices of sheath and insulation in detail, the US Department of Defense standard (MIL-DTL) was applied to determine whether the Toxicity index (T.I.) allowance was exceeded, and the results showed that the insulating materials emitted considerably more than the allowable limit.
Keywords
Non-class 1E cable; NES 713; Toxicity index; Combustion gas; Human hazardousness;
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