I think that their little research reactor, Soreq, is inspected on a voluntary basis, but I don’t think that the Negev site gets inspected. Israel is not a member of the non-proliferation treaty and thus are not subject to inspections to verify account balances for special nuclear material (stuff that can be used to make bombs).
FYI: here is an overview of the U.S.'s interaction with the IAEA et al
NRC: International Safeguards
