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Recorded test data are presented for Tests 1004 and 1006 of the isothermal portion of the Semiscale Blowdown and Emergency Core Cooling (ECC) Project. These data. represent the results of the first tests in the isothermal test series in which simulated ECC injection during blowdown was investigated. The data, presented in the form of composite graphs in engineering units, have been analyzed only t o the extent necessary t o .assure that they are reasonable and correct. The intent of this report is t o make available the uninterpreted data from Tests 1004 and 1006 for use by others and for support of subsequent interpretative reports and analyses.

•• 1 ne NHG Will make available data tapes and operational computer codes on research programs dealing with postulated loss-of-coolant accidents in light water reactors. Persons requesting this information must reimburse the NRC contractors for their expenses in preparing copies of the data tapes and tile operational computer codes. Requests should be submitted to the