Ma'ariv is reporting that every nuclear technician at Israel's Dimona reactor who had submitted visa requests to visit the United States for ongoing science education has had their visa applications rejected, specifically because of their association with the Dimona reactor.
Up until recently, it was routine for Israeli nuclear scientists and technicians to receive such visas and to study at US universities.
Israeli security officials have confirmed that these technicians are being denied visas solely because of their employment at the Dimona reactor.
More details here.
UPDATE: Pajamas Media seems to have mistranslated Ma'ariv; the original article does not say that every nuclear tech was denied nor does it blame the administration.