CSNI1028 IVO/AIR-WATER-CCFL.

IVO/AIR-WATER-CCFL, Air/water countercurrent flow limitation experiments with full-scale fuel bundle structures

NAME OF EXPERIMENT, COMPUTER, DESCRIPTION OF TEST FACILITY, DESCRIPTION OF TEST, PHENOMENA TESTED, STATUS, REFERENCES, TEST DESIGNATION, LANGUAGE, ESTABLISHMENT, MATERIAL, CATEGORIES

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1. NAME OF EXPERIMENT: IVO/AIR-WATER-CCFL.

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2. COMPUTERS

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Program name	Package id	Status	Status date
IVO/AIR-WATER-CCFL	CSNI1028/01	Report	01-JAN-1989

Machines used:

Package ID	Orig. computer	Test computer
CSNI1028/01	Many Computers

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3. DESCRIPTION OF TEST FACILITY

The test facility consists of a vertical flow channel with different internals. The test section was principally made of transparent acrylic material to allow visual observations. One fuel bundle top area structure of the Soviet-type pressurized water reactors VVER-1000 and VVER-440 in full scale was the principal test section. In order to get experimental data on the effects of different parameters on the CCFL behaviour, various configurations of the principal test sections were studied. Plate 1 corresponds to the perforated upper tie plate in full scale of the reactor VVER-1000 and placte 12 to the upper tie plate in full scale of the reactor VVER-440.

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4. DESCRIPTION OF TEST

The procedure of the model tests consisted of establishing the air inlet flow rate and then increasing the water flow rate so that the given liquid head above the perforated plate, or above the fuel rod bundle when the flow channel provided only with the bundle was reached. After the stationary conditions maintained for a prolonged period, the injected water and air flows, and the average height of the mixture level above the perforated plate were registered. All reported air and water flow rates are average values at each test point. The distance of the water inlet from the perforated plate was 2000 mm, and the water level in the water collection chamber was kept constant.
Small-size plates were tested. Also the effect of the unheated fuel rod buncle and the size of the free flow channel on the CCFL behaviour were studied.

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6. PHENOMENA TESTED

Discuss the influence of the flow restrictions in vertical flow channels, like a perforated upper tie plate and a fuel rod bundle below the tie plate, on the countercurrent flow behaviour of air and water.

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9. STATUS

Package ID	Status date	Status
CSNI1028/01	01-JAN-1989	Report Only

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10. REFERENCES

CSNI1028/01, included references:

- I. Kokkonen
Air/water countercurrent flow limitation experiments with full-scale fuel
bundle structures
IVO Research reports IVO-A-07/89
- Kokkonen, H. Tuomisto
Air/water countercurrent flow limitation experiments with full-scale fuel
bundle structures
Reprint from: Experimental therapy and fluid science, Volume 3, Number 6,
November 1990

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11. TEST DESIGNATION: Air/water CCFL.

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12. PROGRAMMING LANGUAGE(S) USED

No specified programming language

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15. ESTABLISHMENT:
Imatran Voima Oy
Power Plant Division
Helsinki, Finland

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16. MATERIAL AVAILABLE

CSNI1028/01

Documentation in electronic format

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