RSICC Home Page MARVIKEN-JIT

RSICC DATA PACKAGE DLC-269

 

 

1.         NAME AND TITLE OF DATA LIBRARY

MARVIKEN-JIT - Marviken Full Scale Jet Impingement Tests Experiments.

RESTRICTIONS:

RSICC is authorized to distribute MARVIKEN-JIT for research and education purposes only. Requesters from NEA Data Bank member countries are advised to order MARVIKEN-JIT from the NEA Data Bank. Non-commercial and non-profit users from other OECD member countries (specifically Canada and the United States) may order MARVIKEN-JIT from RSICC.

 

2.         NAME AND TITLE OF DATA RETRIEVAL PROGRAMS

N/A

 

3.         CONTRIBUTOR

Studsvik Eco & Safety AB, S-611 82 Nykoeping SWEDEN through the OECD Nuclear Energy Agency Data Bank, Issy-les-Moulineaux, France. 

 

4.         HISTORICAL BACKGROUND AND INFORMATION

The Jet Impingement Tests (JIT) project at Marviken constitutes the fourth large scale reactor safety experiment conducted at the Marviken Power Station and is referred to as the Marviken-IV-JIT project. It was established in March 1980. The testing started in September 1980 and continued for about one year.


The behavior of large two-phase, critical flow jets as they exhaust beyond the choking plane is of interest in nuclear power plant design and safety analyses. To prevent the jet resulting from a loss-of-coolant accident (LOCA) from becoming destructive to surrounding equipment, special design features are included to protect against:


- jet impingement on surfaces, components, supports, instrumentation, cables etc, and
- pipe whip due to the reaction forces from the jet acting on the pipe, and
- erosion on surrounding surfaces and equipment.

 

Various features such as structural supports, restraints, and isolation barriers are analyzed based on conservative predictions of the jet loads.  In the 1970s, a need for more extensive experimental information about two-phase jet behavior has led to the performance of a number of small-scale jet impingement experiments at different places throughout the world. In the beginning of 1980 a group of organizations from different countries agreed to jointly undertake a comprehensive program aimed at increasing their knowledge about jet behavior. This program provided all participants with information from different small-scale jet behavior experiments. And other related projects performed by the participants (in kind contributions). To quantify the actual loads from large-scale jets, and to provide a basis for scaling data from laboratory experiments, the group agreed to jointly perform a complementary series of large scale tests in the Marviken testing facility. The results of these tests are summarized herein.


The principal objective of the JIT project was to provide experimental data from a large-scale facility on the behavior of two-phase jets as they exhaust beyond the choking plane into the containment. These data, together with data from small-scale experiments, would provide individual participants the information necessary to develop or verify analytical or empirical models used in estimating jet impingement loads in the safety analysis of nuclear power generating stations.


Both jets with a free expansion and jets directed towards instrumented targets were included in the test program. The free expansion tests provided information about the axial and radial pressure distributions in the jet for different flow regimes, and the jet impingement tests focused on the determination of the total target forces and the force distribution on targets in the jet stream. Emphasis was placed on the determination of the quasi-steady behavior of the jets; in addition, some data were obtained on dynamic aspects of the jet impingement tests.  A total of twelve tests were performed, all with an initial pressure in the reactor vessel of 5 Mpa. Breaks were simulated through nozzles with diameters of 200, 299 and 509 mm. Water line breaks, giving flow regimes from subcooled water through saturated water and steam, as well as steam line breaks were simulated.

 

The organizations represented were from Canada, Germany, Finland, France, Italy, Japan, the Netherlands, Sweden and the United States.

 

5.         APPLICATION OF THE DATA

- Facility description MXD-10l
- Measurement system MXD-102
- Data processing MXD-103
- Data accuracy MXD-104
- Evaluation methods MXD-105
- Test 1 results MXD-201
- Test 2 results MXD-202
- Test 3 results MXD-203
- Test 4 results MXD-204
- Test 5 results MXD-205
- Test 6 results MXD-206
- Test 7 results MXD-207
- Test 8 results MXD-208
- Test 9 results MXD-209
- Test 10 results MXD-210
- Test 11 results MXD-211
- Test 12 results MXD-212
- Summary report MXD-301
- Report abstracts MXD-401
- Conclusions MXD-402

 

6.         SOURCE AND SCOPE OF DATA

DESCRIPTION OF TEST FACILITY - The SET matrix of experiments is suitable for the developmental assessment of thermal-hydraulics transient system computer codes by selecting individual tests from selected facilities, relevant to each phenomena.  Test facilities differ from one another in geometrical dimensions, geometrical configuration and operating capabilities or conditions.  Correlation between SET facility and phenomena were calculated on the basis of suitability for model validation (which means that a facility is designed in such a way as to stimulate the phenomena assumed to occur in a plant and is sufficiently instrumented); limited suitability for model variation (which means that a facility is designed in such a way as to stimulate the phenomena assumed to occur in a plant but has problems associated with imperfect scaling, different test fluids or insufficient instrumentation); and unsuitability for model validation.

 

DESCRIPTION OF TEST - Whereas integral experiments are usually designed to follow the behavior of a reactor system in various off-normal or accident transients, separate effects tests focus on the behavior of a single component, or on the characteristics of one thermal-hydraulic phenomenon. The construction of a separate effects test matrix is an attempt to collect together the best sets of openly available test data for code validation, assessment and improvement, from the wide range of experiments that have been carried out world-wide in the field of thermal hydraulics.  In all, 2094 tests have been defined for the SET matrix.

 

PHENOMENA TESTED - The SET matrix, as it stands, is representative of the major part of the experimental work which has been carried out in the LWR-safety thermal hydraulics field, covering a large number of phenomena within a large range of useful parameters. The SET matrix also provides a basis for evaluating the existing data base and defining the main axes for further research in LWR-safety thermal hydraulics in relation to separate effects testing.

 

An identification of phenomena for SET is given in OECD/GD(94)82, including basic phenomena, critical flow, phase separation/vertical flow with and without mixture level, stratification in horizontal flow, phase separation at branches, entrainment/de-entrainment, liquid-vapor mixing with condensation, condensation in stratified conditions, spray effects, countercurrent flow, heat transfer and global multidimensional fluid temperature void and flow distribution.  In all, 67 hydraulic phenomena were used to relate to information provided from 187 test facilities used as potential sources of separate effects data.

           

7.         DISCUSSION OF THE DATA RETRIEVAL PROGRAM

N/A

 

8.         DATA FORMAT AND COMPUTER

PC (D00269MNYCP00). 

 

9.         TYPICAL RUNNING TIME

N/A

 

10.       REFERENCES

Included Documentation:

“OECD/NEA-CSNI Separate Effects Test Matrix for Thermal-Hydraulic Code Validation: Volume I - Phenomena Characterisation and Selection of Facilities and Tests,” N. Aksan, F. D’Auri, H. Glaeser, R. Pochard, C. Richards and A. Sjoberg, OECD/GD(94)82 (July 1994).

 

“OECD/NEA-CSNI Separate Effects Test Matrix for Thermal-Hydraulic Code Validation: Volume II - Facility and Experiment Characteristics,” N. Aksan, F. D’Auria, H. Glaeser, R. Pochard, C. Richards and A. Sjoberg, OECD/GD(94)83 (July 1994).

 

11.       CONTENTS OF LIBRARY

The MARVIKEN-JIT data files are transmitted on CD.   

 

12.       DATE OF ABSTRACT

November 2013.

 

KEYWORDS:     Y. Integral Experiments Data, Databases, Benchmarks, Experiments, Jet Impingement, Loss-of-Coolant Accident