Students at the country's largest university have expressed concern that it may be "overpromising" on the amount of face to face, as opposed to online, learning that students will be able to avail of come September.
Last week UCD announced plans for between 40% to 60% of face to face teaching for undergraduates, rising to between 75% to 100% for graduate students.
But the Irish Federation of University Teachers (IFUT), told RTÉ News on Thursday it believed the college was "overpromising".
UCD student’s union has said it shares the concerns expressed by academic staff.
In a statement the union said that based on a cursory look at the proposed timetables for some of UCD’s master’s programmes, the college’s claim seemed to be "an exaggeration".
"In one course, students will have zero in-person class-time for the first five weeks of term, after which they will be expected to be on-campus one day per week. That is closer to 0% than it is to 75%", UCD Student Union President, Conor Anderson said.
Mr Anderson said he was worried that UCD was being "over ambitious in the hopes of attracting international students and filling on campus accommodation".
"This, alongside plans to increase both fees and the number of enrolled students, belies a total lack of concern for student welfare and the public good."
Last week IFUT expressed concern that some universities were allowing commercial factors to weigh heavier than health and safety concerns in planning for reopening.
UCD Student Union has called on the college to be "completely transparent" with all prospective students and to respond to the union’s requests for clarification.
"Students deserve to make informed decisions on whether they will need accommodation near campus or if it will be safe to return to campus, and if they should travel from abroad to UCD", Mr Anderson said.