Analysis of Liquid Effluents Discharge Method Under Normal Condition of One Inland NPP in the Northern Areas of China

Abstract

Building nuclear power plant (NPP) in the inland areas of northern China complies with the requirements, including the energy planning, electricity demand, environment protection and realizing sustainable development. Taking a typical inland NPP in the northern China as an example, this paper analyzes the necessary flow rate of liquid effluents discharge and points out that the typical characteristic of northern nuclear power site is no receiving water or dilution capability insufficiency of the receiving water. Aimed at it, the discharge method of transforming liquid effluents into gaseous effluents (TLE-GE) under normal condition is produced. In order to use the existing facilities and reduce cost, two feasible engineering schemes are given, including air cooling tower TLE-GE, which makes liquid effluents naturally evaporate into gaseous effluents in the air cooling tower and discharges gaseous effluents contained in the elevating airflow to high-altitude atmosphere, and nuclear island stack TLE-GE, which makes liquid effluents forced evaporate into gaseous effluents by evaporators and discharges gaseous effluents contained in the nuclear island exhaust airflow to atmosphere through nuclear island stack. The feasibility analysis is done from operation management, total annual release and dose constraints. The relevant proposals can be used for reference on the discharge method of liquid effluents of the inland NPP located in the northern China with water resource shortage.