Analysis on Duty Cycle and Capacity Design of Lead-Acid Battery Bank for the Class 1E DC Power System of Nuclear Power Plant

摘要

The function of battery bank stores energy to the DC load in general, and DC power system of the nuclear power plant is used to supply DC loads for safety-featured instrumentation and control such as inverter, class 1E power system control and indication, and station annunciation. Class 1E DC power system must provide a power for the design basis accident conditions, and adequate capacity must be available during loss of AC power and subsequent safe shutdown of the plant. Batteries of Class 1E DC power system of the nuclear power plant uses lead-acid batteries in present. This paper analyzes a duty cycle and capacity design of lead-acid battery bank for the class 1E DC power system of nuclear power plant. In addition, parallel application of new secondary batteries is studied for smaller total size and extended lifetime of the energy storage system in nuclear power plant.