Business/R&D

Technology for Earth, Energy for Human

LILW Management

Low and Intermediate Level radioactive Waste(LILW) Disposal Facilities

LILW picture

Low and Intermediate Level radioactive Waste(LILW) refers to the waste that contains only small amount of radioactivity such as protective clothing, gloves, and parts used in radiation facilities such as nuclear power plants and hospitals.
Generally, LILW disposal is divided into two methods : Near Surface Disposal and Rock Cavern Disposal.
Rock Cavern Disposal is a method to dispose the waste using the natural and artificial barrier inside the bedrock or underground cave. In most cases, the cave is excavated artificially to secure safety. This method, hydrogeologically must secure safety when storing waste for long time, so is advantageous in regions where there are huge bedrocks with no second crevice, such as cracks or fracture zone, low water permeability and homogeneous characteristics.

Near Surface Disposal is a method to dispose radioactive waste using natural or artificial barrier at around 30m depth from the surface. To secure safety, disposal using artificial barrier is being used widely. This method is advantageous in regions where topsoil is developed, and have good drainage and low precipitation. Furthermore, Near Surface Disposal method uses artificial barrier to block leakage of radionuclide, and is easier to construct than rock cavern disposal method.

KEPCO E&C has A/E performance on rock cavern disposal facilities near surface disposal type low and intermediate radioactive waste disposal facilities.

Section View of Underground Repository

Korean 1st stage LILW facilities is a rock cavern method, and KEPCO E&C conducted A/E. At the 1st stage disposal facilities constructed for the first time in Asia, LILW corresponding to 100,000 drums will be disposed at the rock cavern disposal facilities at the 80–130m depth underground. In particular, by being awarded the ‘Tunnelling Project of the Year’ at the ‘ITA Awards 2015’, KEPCO E&C’s safety design capability has been recognized worldwide. ITA Awards is the world authority awards in the tunnel and underground construction field hosted by the International Tunnelling and Underground Space Association. KEPCO E&C also performs the Korea’s 2nd low and intermediate radioactive waste disposal project constructed in a near surface method. This project is expected to be completed in 2021, and can dispose 125,000 drums of waste.

Major Projects

Low and Intermediate Radioactive Waste Projects Performance List
Name of Services Service Period Customer

A feasibility study on installing a radioactive waste cryogenic distillation incinerator

May 1984–Nov.1984

KEPCO

Performance diagnosis services for radioactive waste evaporation equipment

Sep.1995–Apr.1996

KEPCO

Preparation of Wolsong TRF licensing document

Oct.2000–Mar.2001

KEPCO

Development of integrated information system for safe management of radioactive waste and spent fuel

Oct.2000–Mar.2001

KEPCO

Development of integrated information system for safe management of radioactive waste and spent fuel (II)

Dec.2001–May 2002

KEPCO

A/E services for low and intermediate radioactive waste disposal facilities

Nov.2006–Jun.2014

KORAD

A/E services for the 2nd stage low and intermediate radioactive waste disposal facilities

May 2014–Dec.2016

KORAD