Holtec’s Green Boiler (HGB) pilot project is marking a key step in validating its innovative thermal energy storage technology under real-world operating conditions.

The primary objective of the pilot is to validate large-scale performance of the engineered salt-based storage system, while demonstrating efficient heat retention and controlled release. The project will also generate valuable real-time operational and performance data to support future deployment.

Excavation & Foundation work: Excavation has been carried out to the required depth below ground level. A thick rubble soling layer has been provided to achieve the required bearing capacity of the soil strata. The foundation was built to support the steel structure on which the HGB system is installed, with proper compaction and leveling for stability.

The scope of the pilot includes full installation and operation of the HGB system, encompassing salt charging through an electric heater, thermal storage over a defined duration, and controlled heat discharge for steam generation. Advanced instrumentation and monitoring systems have been integrated to track key performance parameters throughout the process.

Engineering and procurement activities have been successfully completed, and construction is currently progressing at site.

A mobile crane lifted the HGB in place and positioned in a vertical orientation and installed on the dedicated supporting structure.
All equipment has been installed. Piping work has been completed. Non-Destructive Testing (NDT) and hydrostatic testing of the piping system are currently in progress.