In this paper, we propose new strategies to manage bulk material inventory in plant yard using RFID(Radio Frequency IDentification) technology. In the new strategies, we subdivide the field inventory area into cells to be coved by RFID readers. Each cell is covered by a RFID reader to keep tracking the current inventory of the bulk materials. The proposed method can be used any kind of plants. The strategy is proposed to Korean Nuclear plants. Keywords RFID, field management, bulk material inventory, nuclear plant, area subdivision.