Karachi local time July 12, 2021, the "Hualong No. 1" overseas K-3 unit containment pressure level was dropped to atmosphere, and the 0-meter personnel hatch was opened, marking the successful completion of the K-3 unit containment test. After sampling and analyzing the gas in the containment, the special team for the overall test of the containment consisting of professionals from related organizations had conducted a comprehensive inspection of the area inside the containment. No abnormalities or damages were found in the mechanical, electrical, and instrument control equipment. At the same time, safety measures such as fire protection and lighting were restored.

The preliminary analysis results of the containment structure strength test show that the changes of various parameters of the containment structure are within the acceptance criteria, and the measured leakage rate of the containment test is far less than the acceptance criteria. (News source: China Nuclear Power Engineering Co., Ltd.)