Radiation protection for foreign body salvage work in primary of nuclear power plant

Abstract

The foreign materials in primary of nuclear power plant are activated with the coolant into the core, and the activated foreign materials are highly radioactive, while these highly radioactive foreign materials are often easily deposited in the primary related equipment. Hence, operators are frequently overexposed to radiation during foreign body salvage work in primary systems. Special transfer shielding devices, high discharge waste storage containers, and transfer area isolation control are designed to effectively reduce the impact of foreign body transfer and storage on the radiation level of the surrounding area and to ensure the radiation safety of the staff. Theoretical calculations of foreign body activation are consistent with the measured on-site radiation levels and can be used to guide the radiation protection work plan and personnel protection measures during foreign body salvage work.

Keywords

• nuclear power plants
• foreign objects
• corrosion activation
• dose rate
• radiation protection
• salvage