海地瓜聚集行为对核电厂冷源的风险分析

Risk Analysis of the Aggregation Behavior of Acaudina Molpadioides on Nuclear Power Plant Cold Source

福建北部海域5月中下旬,海地瓜亲体进入繁殖季节高峰期;6月中旬小型海地瓜在沉积物浅表层生存,9月中旬前受台风搅动可再悬浮进入水体。海地瓜繁殖能力强,在幼体浮游阶段和小型海地瓜再悬浮阶段两次区域再分配以及核电厂取水作用下,可在核电厂取水口海域形成海地瓜高聚集区;伴随着海地瓜指数性增长,可在7—9月形成大量的致灾小型海地瓜,在台风等作用下悬浮进入水体,在取水作用下聚集于鼓网并致灾。因此在海地瓜适宜生长环境建设核电厂,应开展海地瓜聚集风险评估与防控措施。

In Middle-late May,reproductive parents reach the peak of breeding season in the northern coast of Fujian.Juveniles survive on the shallow surface of sediment in mid June,and can be resuspended into water bodies before mid September due to typhoon agitation.Due to strong reproductive capacity and two regional redistribution stages in the floating stage of larval and the re-suspension stage of juvenile,a high concentration area of A.molpadioides can be formed in nuclear power intake area under the action of water intaking.With the exponential growth of A.molpadioides,a large number of disaster causing juveniles can form between July and September,which are suspended in the water under the action of typhoons and other factors,and gather in the drum filter under the action of water intake,causing disasters.Therefore risk assessment and prevention measures for the aggregation of A.molpadioides should be carried out for the construction of nuclear power plants in suitable growing environment.