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.

No abstract

Recorded test data are presented for Tests 1008 and 1010 of the isothermal portion of the Semiscale Blowdown and Emergency Core Cooling (ECC) ,Project. These data represent the results of the first isothermal tests utilizing an enlarged downcomer gap (1.0 inch) in the pressure vessel to investigate general system hydraulic response both with and without simulated ECC injection. The data, presented in the form of composite graphs in engineering units, have been analyzed only t o the extent necessary to assure that they are reasonable and correct. The intent of this report is to make available the uninterpreted data from Tests 1008 and 1010 for use by others and for support of subsequent interpretive reports and analysis. ii.

No abstract

The isothermal test series is part of the Semiscale Blowdown and Emergency Core Cooling (ECC) Project conducted by Aerojet Nuclear Company for the U. S. Atomic Energy Commission. The test series consisted of ten blowdown tests and five hot-wall tests with emphasis on emergency core coolant delivery. The blowdown tests were conducted to investigate the effects of lower plenum geometry, heat transfer configuration, ECC injection location, downcomer gap size, and break size. The hot-wall tests were conducted to investigate the effects of residual vessel wall heat on ECC delivery after blowdown was completed. The test system included a pressure vessel with internals; an operating loop with steam generator, pump, and pressurizer; a.blowdown loop with rupture assembly, simulated pump, and simulated steam generator; a pressure suppression system with suppression tank and header, and a simulated ECC system with accumulators and injection pumps. The isothermal test program, 1-112-loop semiscale system, experimental instrumentation, operating procedures, and test conditions are described in this report to provide a reference document for support of ,the data reports specific to one or more of the isothermal tests. Presented are descriptions of the test program, test apparatus, instrumentation, operating procedures,.and test conditions.