CNNC 404 Co Ltd, a subsidiary of China National Nuclear Corporation (CNNC), has made a breakthrough in radioactive isotope technology, marking China's shift from reliance on imports to fully domestic production of krypton isotope thickness-gauging sources.

Krypton isotopes are important radioactive isotopes widely used in industrial thickness measurement, instrument calibration, and tracer monitoring. They are particularly essential for quality control in high-end manufacturing sectors such as new energy batteries, specialty paper, and thin films.

CNNC 404 has successfully developed various specifications of krypton isotope thickness-gauging sources with independent intellectual property rights, meeting the needs of diverse industrial thickness measurement applications. The achievement provides solid support for the sustainable and high-quality development of China's high-end manufacturing industries.