Southern California Edison has declined to confirm whether or not the process to move nuclear waste from wet to dry storage has begun at the decommissioned San Onofre Nuclear Generating Station.
The company previously said the process would begin in mid-December and be completed by 2019.
Experts say that dry storage is a safer way to store nuclear waste than wet storage.
The nuclear waste is being stored at the decommissioned facility because the federal government has not yet approved a permanent location for the spent nuclear fuel.
Rob Nikolewski, energy reporter at The San Diego Union-Tribune, has been reporting on the issue since 2016. He will join Midday Edition on Tuesday to provide an overview of the process.