Kärnkistor

Kärnkistor is a Swedish term that translates to "nuclear coffin" or "nuclear casket." It refers to the large, robust containers used to transport and store spent nuclear fuel. These caskets are designed to withstand extreme conditions, including high temperatures, impacts, and radiation, ensuring the safe containment of radioactive materials. The primary purpose of kärnkistor is to prevent the release of radioactive substances into the environment during transport from nuclear power plants to interim storage facilities or final disposal sites.

The design and construction of kärnkistor are subject to stringent international regulations and standards. They are typically made of thick steel and may incorporate layers of concrete or other shielding materials to absorb radiation. The interior of the caskets is often designed to securely hold fuel assemblies, preventing movement and potential damage. Before being sealed, the fuel is cooled and often placed in a protective atmosphere to prevent oxidation.

Kärnkistor play a crucial role in the nuclear fuel cycle, providing a secure method for managing highly radioactive spent fuel. Their development and deployment are essential for maintaining safety and public confidence in nuclear power. The long-term storage or disposal of these filled kärnkistor is a significant challenge, with ongoing research and development focused on finding permanent solutions that guarantee containment for the vast timescales required for radioactivity to decay to safe levels.