A股核污染防治板块开盘大跌，捷强装备竞价20CM跌停，中金辐照跌超9%，沪江材料、北化股份等多股跟跌。

Group 1 - The A-share nuclear pollution prevention sector experienced a significant decline at the opening, with Jieqiang Equipment hitting the 20% limit down [1] - Zhongjin Irradiation fell over 9%, indicating a broader negative sentiment in the sector [1] - Other stocks such as Hujiang Materials and Beihua Co. also followed the downward trend, reflecting a widespread impact on the industry [1]