CSNI1011 NEPTUN/5007.
NEPTUN/5007, PWR LOCA Cooling Heat Transfer Tests for Loft, Boil-Off Experiments
NAME OR DESIGNATION, COMPUTER, DESCRIPTION OF TEST FACILITY, DESCRIPTION OF TEST, STATUS, REFERENCES, TEST DESIGNATION, LANGUAGE, ESTABLISHMENT, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| NEPTUN/5007 | CSNI1011/01 | Arrived | 21-JUL-1993 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| CSNI1011/01 | Many Computers |
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3. DESCRIPTION OF TEST FACILITY
NEPTUN is designed to perform PWR LOCA simulation experiments, which provide the full length emergency cooling heat transfer tests for LOFT. Therefore the NEPTUN heater bundle with 33 electrical heater elements and 4 guide tubes simulates a section of the LOFT nuclear core. The main test loop also contains measuring systems for the carry-over rate and for the steam expelled, and a backpressure control system. A water loop brings the water to the initial reflooding conditions. In addition, auxiliary systems maintain normal operating conditions.
NEPTUN is designed to perform PWR LOCA simulation experiments, which provide the full length emergency cooling heat transfer tests for LOFT. Therefore the NEPTUN heater bundle with 33 electrical heater elements and 4 guide tubes simulates a section of the LOFT nuclear core. The main test loop also contains measuring systems for the carry-over rate and for the steam expelled, and a backpressure control system. A water loop brings the water to the initial reflooding conditions. In addition, auxiliary systems maintain normal operating conditions.
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4. DESCRIPTION OF TEST
Test 5007 was one of ten core boil-off experiments. It was chosen as the "base case", because it was conducted at high pressure and intermediate power. The power is increased at about 50 secs and a rapid drop in the core fluid level occurs at about 100 secs. Between 100 and 110 secs, large voids are formed expelling some of the liquid from the core. At about 800 secs the power is shut off and the rods are allowed to cool down before the system is reflooded.
Test 5007 was one of ten core boil-off experiments. It was chosen as the "base case", because it was conducted at high pressure and intermediate power. The power is increased at about 50 secs and a rapid drop in the core fluid level occurs at about 100 secs. Between 100 and 110 secs, large voids are formed expelling some of the liquid from the core. At about 800 secs the power is shut off and the rods are allowed to cool down before the system is reflooded.
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CSNI1011/01, included references:
- S.N.Aksan, F. Stierli, G.Th. Analytis:Boil-Off Experiments with the EIR-NEPTUN Facility:
Analysis and Code Assessment Overview Report
NUREG/IA-0040, EIR Bericht Nr. 629, March 1992
- H. Gruetter, F. Stierli, S.N. Aksan, G. Varadi:
Neptun Bundle Reflooding Experiments: Test Facility Description
EIR Bericht Nr. 386, March 1980
- NEPTUN Tape Content
- M. Richner, G.Th. Analytis and S.N. Aksan:
Assessment of RELAP5/MOD2, Cycle 36.02, Using NEPTUN
Reflooding Experimental Data
NUREG/IA-0054 (August 1992)
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CSNI1011/01
CCVM data mag tapeBoil-off test 5007 data (1,818,000 bytes) CVMTPKeywords: data, loss-of-coolant accident, transients.