Launched in 2014, the Cesium Irradiator Replacement Project (CIRP) is a program offered through the Department of Energy’s (DOE) National Nuclear Security Administration (NNSA) Office of Radiological Security (ORS) to convert domestic users of radioisotopic (cesium-137 or cobalt-60) based irradiators to viable, non-radioisotopic alternatives.

Radioisotopes, like Cesium-137 or Cobalt-60, are common radionuclides with a relatively long half-life that emit gamma radiation during decay. The potential effects on human health can include:

• Skin burns from exposure
• Ionizing radiation exposure to internal tissue and organs, through exposure, ingestion, or inhalation
• Malignant tumors
• Shortened life span

In addition, the use of radioisotopic irradiators require strict security, licensing, and regulatory compliance. Switching to a non-cesium 137 or cobalt-60 irradiator can save your facility large costs associated with:

• High Insurance premiums
• Site preparation
• Staff background checks
• High service costs
• Annual Inspections
• Annual recalibrations
• Transportation costs

CIRP provides qualified sites, who are interested in making the switch, with a financial incentive towards the purchase price of a new non-radioisotopic device. In addition, they will also remove and dispose the irradiator.


Qualified participants can receive:

• Removal and disposal of the radioisotopic irradiator, saving the facility approximately $100-200k per irradiator.
• Financial payment, up to 50% or $135k, of the purchase price towards the purchase of a new non-radioisotopic system.

The site is responsible for:

• Evaluating and selecting a replacement irradiator.
• The remaining costs associated with the purchase of a new irradiator
• Shipping, rigging, and installation
• Associated warranty/maintenance costs
• Training

The whole process can take approximately 10-12 months

• Fill out the application, which includes getting a quote for an x-ray irradiator
• CIRP reaches out regarding funding approval
• Place your order with the selected company
• X-ray irradiator is delivered and installed
• CIRP releases 50% funds
• Coordinate removal of radioisotopic irradiator with CIRP
• CIRP releases remaining funds

For further information on the Cesium Irradiator Replacement Project and to discuss whether and how the Project could work for your site, please contact ORS at [email protected]