I can't answer the specific question but if you're talking about retirement benefits from Social Security and Medicare it's not accurate to characterize these as "welfare." These are earned-benefits programs. The distinction is important and apropos to what I suspect is the thrust of your question.

She accepted Medicare and Social Security benefits, and based on what she wrote in her publications, this was not contrary to her philosophy (essentially on the grounds that she had been required to pay into the system). See http://aynrandlexicon.com/lexicon/government_grants_and_scholarships.html

If your case is at all typical, you probably heard this "Rand hypocritically accepted government benefits" from not-very-honest individuals who never bothered to even think to inquire about what Rand actually thought about this sort of thing. (Years of exposure to Rand's enemies has told me that it is typical for them to smear her in bad faith, both intellectually and personally, in all kinds of ways.)