Preliminary conceptual design of borehole disposal facility for disused sealed radioactive sources at Serpong Nuclear Center-Indonesia

Abstract

Borehole disposal facility is planned to be designed by the Center for Radioactive Waste Technology-National Nuclear Energy Agency of the Republic of Indonesia to dispose the Disused Sealed Radioactive Sources (DSRS). Up to now, the DSRS is still stored safely in the interim storage facilities at Serpong Nuclear Center. Most DSRS come from the industry and hospital sectors. Until 2019, about 3031 pieces of DSRS are being stored at the interim storage facilities in the 200L drum shells and 350L/950L concrete shells. The proposed facility is to accommodate the category 3-5 DSRS. Borehole disposal facilities are planned to be placed at a depth of about 100 m, on the clay formation. Several factors were taken into account in preparing the conceptual design of the borehole disposal facility. Multiple barrier systems are used in the facility. Passive and natural barriers are used to isolate the waste packages from the biosphere. The barriers also provide an effective containment system for long-term safety and function to limit the possibility of human intrusion (security and safety) to the facility. The aim of the paper is to explain the description of the conceptual design of the borehole disposal that will be designed.