ML20207A211

Requests Permission to Use Corexit Facility in Experiments to Investigate Effects of Multiple Melt Jets & Water Depth on Corium Breakup & Mixing,Quench Rate,Hydrogen Generation & Debris Characteristics

ML20207A211
Person / Time
Issue date:	11/07/1985
From:	Curtis R NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
To:	Seghal R ELECTRIC POWER RESEARCH INSTITUTE
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References
FOIA-86-678 NUDOCS 8611100077
Download: ML20207A211 (8)

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Dr. Raj Seghal Electric Power Research Institute P.O. Box 10412 Palo Alto,CA 94203 NOV 0 71985

Dear Dr. Seghal:

We propose to conduct a series of experiments in the COREXIT Facility with Dr. B. W. Spencer as principal investigator at Argonne National Laboratory.

The primary purpose of these experiments is to investigate the effects of multiple melt. jets and water depth on corium breakup and mixing, quench rate, hydrogen generation, and debris characteristics.

Since the COREXIT Facility was constructed by EPRI, we would like your permission to use the COREXIT Facility for these experiments.

In exchange, we will provide all the resulting information as soon as it is available to us.

Given your recent work at ANL with single melt jets and your interest in this research area, we would greatly appreciate your coments on our proposed experiments. A copy is enclosed.

We would like an opportunity to coordinate our tests with your ongoing work.

It is my understanding that your work will be completed in February 1986 and we could initiate our work shortly thereafter. We would appreciate a meeting, at a mutually agreeable date, to discuss the proposed exper.imental plans.

Mr. John Telford (301-427-4576) would be glad to answer any questions you may have on the proposed experiments.

I look forward to working with you.

Sincerely, Robert T. Curtis, Chief Containment Systems Reserach Branch

Enclosure:

As stated bcc:

B. W. Spencer, ANL w/o enclosure distribution:

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October 1,1985 FY 1986 Program Brief Program: DAE

Title:

Corium-Coolant Mixing Fin No.: A2260 Contractor: Argonne Site:

Chicago State:

Illinois NRC Technical Monitor:

J. L. Telford Principal Investigator:

B. W. Spencer (Consultant:

R. P. Anderson)

Objective: To perform designed experiments and analyses for the phenomena governing corium-coolant mixing.

Budget Activity:

601930 Oblig:

$ 205K FY 1986 Scope:

(10/1/85 - 11/30/86) 1.

Conduct a set of designed experiments in the COREXIT Facility to investigate the effects of two independent variables on corium breakup, mixing, quench rate, hydrogen generation, and debris characteristics.

A.

The. independent variables are: water depth and number of holes in a submergered stainless steel plate.

(1) The two levels of water depth are:

"Icw" is 23.8 inches (60.5 cm); "high" is 42 inches (106 cm). The water depth is measured from the bottom of the water chamber to the top of the steel plate with about 0.25 inches of water above the steel plate.

(2) The two levels for number of holes in a submerged stainless steel plate are:

" low" is four (4) holes arranged in a

" triangular" array, 0.8 inches (2 cm) in diameter, spaced 3 cm center to center; "high" is seven (7) holes arranged in a

" triangular" array, 0.8 inches (2 cm) in diameter spaced 3 cm center to center.

These holes are in two different stainless steel plates each of which will represent a submerged lower grid forging (13.5 inches thick) in their respective tests.

B.

The fixed experimental conditions are:

(1) Delivereo melt temperature is about 2800*C.

(2) The cover gas is argon.

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A2260 2

October i',1985 9

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(3) A nonzero subcooled water temperature, to be determined during 5

pretest analysis.

I (4) System pressure is one atmosphere.

(5) Melt entry. velocity is about 4 m/s.

(6) Delivered corium melt mass is 10 kg.

C.

The experimental matrix is given be?ow.

Corium-Coolant Mixing Series Water Number s

Test Depth (cm) of Holes i

5 1

60.5 4

2 106 4

3 60.5 7

4

'106 7

D.

The measurements made before, during, or after each test include:

water and cover gas pressure and temperature, conversion ratio (in the event of an explosion), physical debris characteristics, chemical debris characteristics (including e.g., XRD, SEM, oxidation states),

hydrogen generation, quench rates, X-ray motion pictures, optical motion pictures in the pipeway exiting into the expansion vessel, and amount of, breakup and mixing.

2.

Analyze the experimental conditions or approach of item 1, given above, for possible improvements; provide the written analysis to the NRC Technical Monitor before start of tests. All changes to the specified experimental conditions must be approved by the NRC Technical Monitor.

3.

Provide technical consultation on specific topics related to corium-coolant mixing and make presentations, as requested by the NRC Technical Monitor-4.

Approximately four progress review meetings will be held during FY 1986.

Providequick-lookdatareportstotheNRCTechNicalMonitoronatimely 5.

basis following completion of each test.

6.

Provide monthly progress and cost letter reports itemizing by subtask activity and any travel.

Suninarize project activities for the past month and identify any problems that might affect project milestones. This report will be submitted to the NRC Technical Monitor by the 10th of each month.

7.

Provide a final report by November 30, 1986 including results from all four tests, interpretation, and model comparisons.

, - + - - -

t November 6, 1985 FY 1986 Program Brief Program: DAE

Title:

Corium-Coolant Mixing Fin No.: A2260 Contractor: Argonne Site: Chicago State: Illinois NRC Technical Monitor:

Task A - J. L. Telford Task A - J. L. Telford and J. Hopenfeld Principal Investigator: Task A - B. W. Spencer Task B - R. P. Anderson Objective: To perform designed experiments and analyses for the phenomena governing corium-coolant mixing.

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Budget Activity: 601930 FY 1986 PROGRAM: TASK A - S E5GK TASK B - 5 160K TOTAL TIEI:iR FY 1986 Scope:

(10/1/85 - 11/30/86)

Task A - B. W. Spencer 1.

Conduct a set of designed experiments in the COREXIT Facility to investigate the effects of two independent variables on corium breakup, mixing, quench rate, hydrogen generation, and debris characteristics.

A.

The independent variables are: water depth and number of holes in a submergered stainless steel plate.

(1) The two levels of water depth are: " low" is 23.8 inches (60.5 cm); "high" is 42 inches (106 cm). The water depth is measured from the bottom of the water chamber to the top of the steel plate with about 0.25 inches of water above the steel plate.

(2) The two levels for number of holes in a submerged stainless steel plate are: " low" is four (4) holes arranged in a J

"teh9ular" array, 0.8 inches (2 cm) in diameter, spaced 3 cm center to center; "high" is seven (7) holes arranged in a

" triangular" array, 0.8 inches (2 cm) in diameter spaced 3 cm center to center. These holes are in two different stainless steel plates each of which will represent a submerged lower grid forging (13.5 inches thick) in their respective tests.

B.

The fixed experimental conditions are:

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Fin No.: A2260 2

November 6,'1985 (1) Delivered melt temperature is about 2800*C.

(2) The cover gas is argon.

(3) A nonzero subcooled water temperature, to be determined during pretest analysis.

(4) System pressure is one atmosphere.

(5) Melt entry velocity is about 4 m/s.

(6) Delivered corium melt mass is 10 kg.

C.

The experimental matrix is given below.

Corium-Coolant Mixing Series Water Number Test Depth (cm) of Holes 1

60.5 4

2 106 4

3 60.5 7

4 106 7

D.

The measurements made before, during, or after each test include:

water and cover gas pressure _ and temperature, conversion ratio (in the event of an explosion), physical debris characteristics, chemical debris characteristics (including e.g., XRD, SEM, oxidation states),

hydrogen generation, quench rates, X-ray motion pictures, optical motion pictures in the pipeway exiting into the expansion vessel, and amount of breakup and mixing.

2.

Analyze the experimental conditions or approach of item 1, given above, for possible improvements; provide the written analysis to the NRC Technical Monitor before start of tests. All changes to the specified experimental conditions must be approved by the NRC Technical Monitor.

3.

Provide technical consultation on specific topics related to corium-coolant mixing and make presentations, as requested by the NRC Technical Monitor.

4.

Approximately four progress review meetings will be held during FY 1986.

5.

Provide quick-look data reports to the NRC Technical Monitor on a timely basis following completion of each test.

6.

Provide monthly progress and cost letter reports itemizing by subtask activity and any travel. Sumarize project activities for the past month and identify any problems that might affect project milestones. This report will be submitted to the NRC Technical Monitor by the 10th of each month.

Fin No.: A2260 3

November 6, 1985

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7.

Provide a final report by November 30, 1986 including results trom all four tests, interpretation, and model comparisons.

Task B - R. P. Anderson 1.

Conduct a set of designed experiments for the Statified Contact Mode to investigate the effects of three independent variables on gas phase pressure, liquid phase pressure, depth of mixing, and energy conversion ratio. The independent variables are: surface area of interaction, separation space, and temperature difference. Photography of the experiments will be used extensively. The materials used will be freon and water or other materials (e.g., salt or tin) as approved by the NRC Technical Monitors, a.

The text matrix, experimental conditions, and schedule will be jointly determined by the Principal Investigator and the NRC Technical Monitors (with advice from consultants).

b.

This series of experiments will be conducted first.

2.

Conduct a set of designed experiments for the Pour Contact Mode to investigate the effects of four independent variables on gas phase pressure, liquid phase pressure, and energy conversion ratio. The independent variables are: liquid slug height, mass ratio, compressible volume, and temperature. Photography of the experiments will be used extensively. The materials used will be freon and water or other materials (e.g., smelt and water) as approved by the NRC Technical Monitors.

a.

The test matrix, experimental conditions, and schedules will be jointly determined by the Principal Investigator and the NRC Technical Monitors.

b.

This series of experiments will be conducted second.

3.

Provide technical consultation on specific topics related to corium-coolant mixing and make presentations, as requested by the NRC Technicai Monitors.

4.

Approximately four progress review meetings will be held during FY 1986.

5.

Provide quick-look data reports to the NRC Technical Monitors on a timely basis following completion of each experimental series.

6.

Provide monthly progress and cost letter reports itemizing by subtask activity and any travel. Sumarize project activities for the past month and identify any problems that might affect project milestones. This report will be submitted to the NRC Technical Monitors by the 10th of each month.

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November 6. 1985' i

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Provide a final report by September 3 tests, interpretation, and any modeT.0,.1986 including results from all comparisons.

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