The Iraqi president, Jalal Talabani, fears that Iraq would be faced with counterclaims worth billions of dollars from Iraqi Jews demanding compensation if it pursued a claim against Israel for compensation for destroying its nuclear reactor, according to this report in Al-Sabah translated by MEMRI:
"The Iraqi Parliamentary Foreign Relations Committee is discussing the demand that Israel compensate Iraq for the 1981 bombing of the nuclear reactor in the country.
"The discussion is in keeping with U.N. Security Council Resolution 487, which called on Israel to compensate Iraq for the damages it sustained as a result of the reactor bombing.
"Iraqi President Jalal Talabani warned, however, that if such a claim is made, Iraqi Jews will make counterclaims for compensation for their properties in Iraq, which are worth billions of dollars."
Source: Al-Sabah, Iraq, May 3, 2009
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Update in Ynet News: According to Doron Peskin, the Iraqi parliament bill reclaiming compensation for the reactor bombing was in response to this Jewish claim for $100 billion.