Paralysis is a common theme in Dubliners, and poor Eveline finds herself unable to move forward. She lacks the courage and strength to make that leap that will free her of her oppressive situation. She's too scared to leave Ireland, and sees her lover as a possible source of danger: "All the seas of the world tumbled about her heart. He [Frank] was drawing her into them: he would drown her" (34). But her paralysis will cost her. Instead of an uncertain but hopeful future, she faces a certain and dismal future that may well repeat her mother's sad life story.
The amount of radioactive nuclides found to have been deposited into surrounding lakes has increased the normal baseline radioactive amounts by 100 percent. Most of the radionuclides in surrounding water areas were found in the sediments at the bottom of the lakes. There has been a high incidence of chromosomal changes in plant and animal aquatic organisms, and this generally has correlated with the contamination and resulting genetic instability. Most of the lakes and rivers surrounding the Chernobyl exclusion zone are still highly contaminated with radionuclides (and will be for many years to come) as the natural decontamination processes of nucleotides with longer half-lives can take many years. 
He's from Ireland originally and has come back on vacation from his career as a sailor. At first, his relationship with Eveline went really smoothly and was all kinds of romantic: they went to the theater, he sang her songs, made up nicknames for her, and boasted of all his sailor adventures. The only problem was Eveline's father, who eventually banned her from seeing him, because he's a big fat jerk. Since they kept meeting in secret, the relationship kept on and eventually included an invitation to return to Argentina with him and be his wife. Swoon, right?