CSNI0043 ROSA-III/952.
ROSA-III/952, BWR Rig of Safety Assessment for LOCA, Reference MSL Break Test
NAME OR DESIGNATION, COMPUTER, DESCRIPTION OF TEST FACILITY, DESCRIPTION OF TEST, RESTRICTIONS, PHENOMENA TESTED, FEATURES, AUXILIARIES, STATUS, REFERENCES, TEST DESIGNATION, LANGUAGE, ESTABLISHMENT, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| ROSA-III/952 | CSNI0043/02 | Tested | 17-SEP-2010 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| CSNI0043/02 | Many Computers | PC Windows |
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3. DESCRIPTION OF TEST FACILITY
ROSA-III is a 1/124 scaled down test facility with electrically heated core designed to study the response of engineered safety features to loss-of-coolant accidents in in commercial BWR. It consists of the following, fully instrumented subsystems:
(a) the pressure vessel with a core simulating four half-length fuel assemblies and control rod;
(b) steam line and feed water line, which are independent open loops;
(c) coolant recirculation system, which consists of two loops provided with a recirculation pump and two jet pumps in each loop;
(d) emergency cooling system, including HPCS, LPCS, LPCI, and ADS.
ROSA-III is a 1/124 scaled down test facility with electrically heated core designed to study the response of engineered safety features to loss-of-coolant accidents in in commercial BWR. It consists of the following, fully instrumented subsystems:
(a) the pressure vessel with a core simulating four half-length fuel assemblies and control rod;
(b) steam line and feed water line, which are independent open loops;
(c) coolant recirculation system, which consists of two loops provided with a recirculation pump and two jet pumps in each loop;
(d) emergency cooling system, including HPCS, LPCS, LPCI, and ADS.
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4. DESCRIPTION OF TEST
Run 952 is a reference MSL break test
performed with a 100% break upstream of the main steam isolation
valve and with full ECCS actuation logic. The MSL break is
characterized by a system depressurization due to a break flow of
high mass quality, which is slower than with a recirculation line
break. Continuous flashing of the fluid in the pressure vessel was
observed. A slow decrease in the downcomer water level eventually
led to actuation of HPCS, but not LPCS or LPCI. About 2/3 of the
core was uncovered, but the coolant level recovered quickly
following HPCS injection. A peak cladding temperature of 752K was
reached.
Run 952 is a reference MSL break test
performed with a 100% break upstream of the main steam isolation
valve and with full ECCS actuation logic. The MSL break is
characterized by a system depressurization due to a break flow of
high mass quality, which is slower than with a recirculation line
break. Continuous flashing of the fluid in the pressure vessel was
observed. A slow decrease in the downcomer water level eventually
led to actuation of HPCS, but not LPCS or LPCI. About 2/3 of the
core was uncovered, but the coolant level recovered quickly
following HPCS injection. A peak cladding temperature of 752K was
reached.
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CSNI0043/02, included references:
- Y. ANODA, K. TASAKA, H. KUMAMARU, M. SHIBA:ROSA-III System Description for Fuel Assembly No. 4, JAERI-M 9363, February 1981
- M. Kawaji et al.:
A Main Steam Line Break Experiment at ROSA-III Run 952 (Standart Run with full
ECCS), JAERI-M 84-229, December 1984
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Keywords: data, loss-of-coolant accident, transients.