CSNI0078 MARVIKEN-FSCB-I.

1. NAME OR DESIGNATION:  MARVIKEN-FSCB-I, Marviken Full Scale Containment Blowdown experiments Series I.

3. DESCRIPTION

A series of full scale reactor containment experiments was performed in the Marviken Power Station, the abandoned Swedish nuclear plant, which was originally built as a direct cycle BHWR with natural circulation. These experiments were oriented towards the enhancement of reactor safety and were carried out as a joint project.

The experiments included studies of:
- containment response to simulated ruptures in pipe systems connected to the pressure vessel - blowdown
- iodine transport within the containment and containment leakage during and after blowdown
- auxiliary component response to and behaviour under loss of coolant accident conditions within a containment

The reports present and discuss the characteristic responses of the Marviken containment to the sixteen blowdown runs, which were carried out under different conditions with the objective of establishing a basis for testing computer codes. The reports contain also descriptions of the Marviken test facility, the instrumentation system and the data processing operations. A review of the accuracy of the most fundamental parameters, the discharge mass flow rate, containment pressure and containment temperature is also given, followed by some comments on the limited attempt to verify computer codes within the project.

A special group from the Gesellschaft fur Kernforschung (GfK), Karlsruhe, was attached to the project with the specific aim of studying pressure oscillations in the wetwell water pool While the GfK instrumentation and data collection systems were separate from those of the project, the results of the evaluations of these measurements are reported in this series, both as an integral part of the blowdown experiment evaluations when the information is relevant and in a comprehensive manner in separate reports of the series.


These experiments were carried out during the period from August 1972 to May 1973. The organizations represented were Denmark, Germany, Finland, Norway, Sweden and the United States.

The abstracts of all reports in the series are collected in MXA-0-401 and the report titles are listed on the back cover.

- Description Of The Test Facility, MXA-1-101
- Instrumentation Equipment And Data Acquisition System, MXA-1-110
- Status Of The Instrumentation For Each Blowdown, MXA-1-111
- Structure Of The Data Tapes Containing Data Converted Into Physical Units,
MXA-1-112
- Conversion Of Data Into Physical Units, MXA-1-113
- Instrumentation Error Limits, MXA-1-114
- Evaluation System, Evaluation Methods And Error Limits For Gfk Measurements
In The Wetwell, MXA-1-115
- Blowdown 1 Results, MXA-1-201 ; - Blowdown 2 Results, MXA-1-202 ;
- Blowdown 3 Results, MXA-1-203 ; - Blowdown 4 Results, MXA-1-204 ;
- Blowdown 5 Results, MXA-1-205 ; - Blowdown 6 Results, MXA-1-206 ;
- Blowdown 7 Results, MXA-1-207 ; - Blowdown 8 Results, MXA-1-208 ;
- Blowdown 9 Results, MXA-1-209 ; - Blowdown 10 Results, MXA-1-210 ;
- Blowdown 11 Results, MXA-1-211 ; - Blowdown 12 Results, MXA-1-212 ;
- Blowdown 13 Results, MXA-1-213 ; - Blowdown 14 Results, MXA-1-214 ;
- Blowdown 15 Results, MXA-1-215 ; - Blowdown 16 Results, MXA-1-216
- Pressure Fluctuations In The Wetwell Pool (Steam Blowdowns)(Gfk), MXA-1-221
- Pressure Fluctuations In The Wetwell Pool (Water Blowdowns)(Gfk), MXA-1-222
- Vent Flow Measurements (Velocity, Composition Of The Vent Flow)(Gfk),
MXA-1-223
- Evaluation Methods, MXA-1-231
- Summary Report, MXA-1-301
- Description Of The Zoco II Containment Code, MXA-2-101
- Description Of The Zoco V Containment Code, MXA-2-102
- (Report Number Not Utilized, MXA-2-103)
- Description Of The PRESU Containment Code, MXA-2-104
- Description Of The CONTAC Containment Code, MXA-2-105
- Description Of The LOCACC Vessel Blowdown Code, MXA-2-106
- Calculations Carried Out With The Zoco II Code, MXA-2-201
- Calculations Carried Out With The Zoco V  Code, MXA-2-202
- (Report Number Not Utilized, MXA-2-203)
- Calculations Carried Out With The PRESU Code, MXA-2-204
- Calculations Carried Out With The CONTAC Code, MXA-2-205
- Calculations Carried Out With The LOCACC Code, MXA-2-206
- Behaviour Of Iodine In The Containment During The Blowdown Runs. Experimental
Methods, MXA-3-101
- Leakage Of Xenon And Iodine From The Containment During The Blowdown Runs.
Experimental Methods, MXA-3-111
- Investigations Of The Stay Time Of Xenon In The Emergency Ventilation System,
MXA-3-112
- Containment Leakage Determined By The Absolute Method Before The Blowdown
Series, MXA-3-113
- Containment Leakage Determined By The Absolute Method After The Blowdown
Series, MXA-3-114
- Containment Leakage Determined By Radioactive Isotope Tracer Technique Before
And After The Blowdown Series, MXA-3-115
- Behaviour Of Iodine In The Containment During The Blowdown Runs. Results,
MXA-3-201
- Leakage Of Xenon And Iodine From The Containment During The Blowdown Runs.
Results, MXA-3-211
- The Application Of A Radioactive Tracer Isotope Method For Determining
Containment Leakage, MXA-3-212
- Behaviour Of Iodine In The Containment During The Blowdown Runs. Discussion
Of Results, MXA-3-301
- Leakage Of Xenon And Iodine From The Containment During The Blowdown Runs.
Discussion of Results, MXA-3-311
- Measuring Devices, MXA-4-201
- Automatic Switches, MXA-4-202
- Electrical Installation Materials, MXA-4-203
- Electric Motors, MXA-4-204
- Valve Actuators, MXA-4-205
- Paint And Heat Insulation, MXA-4-206
- Index To And Abstracts Of Final Reports, MXA-0-401
- Containment Response To A Loss Of Coolant Accident. Conclusions And
Recommendations, MXA-0-402
- Iodine And Xenon Experiments. Conclusions And Recommendations, MXA-0-403
- Component Tests. Conclusions And Recommendations, MXA-0-404
- Jan-Erik Marklund: Summary Report for ISP an International Standard Problem
for Containment Codes, Based on Blowdown No 18 in the Marviken Full Scale
Experiments, STUDSVIK/NR-84/464 (1984-09-19)

15. ESTABLISHMENT:
Studsvik Eco & Safety AB
S-611 82 Nykoeping
SWEDEN

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