Kt Factor analysis of lead-acid battery for nuclear power plant

Electrical equipments of nuclear power plant are divided into class 1E and non-class 1E. Electrical equipment and systems that are essential to emergency reactor shutdown, containment isolation, reactor core cooling, and containment and reactor heat removal, are classified as class 1E. Class 1E batteries of nuclear power plant are divided into four channels, which are physically and electrically separate and independent. The battery bank of class 1E DC power system of the nuclear power plant uses lead-acid batteries in present. The lead acid battery, which has a high energy density, is the most popular form of energy storage. K_t factor of lead-acid battery is used to determine battery size and it is one of calculating coefficient for capacity. This paper analyzes K_t factor of lead-acid battery for the DC power system of nuclear power plant. In addition, correlation between K_t parameter and Peukert´s exponent of lead-acid battery for nuclear power plant are discussed. The analytical results contribute to optimize of determining size for Lead-acid battery bank.