wp1.5 meeting status source term + sgtr johan carlsson
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WP1.5 meeting Status source term + SGTR Johan Carlsson. Impact of iodine, caesium and caesium iodine in Pb-Bi System. Experiment executed at FZK - PowerPoint PPT PresentationTRANSCRIPT
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IP EUROTRANS Lyon on 10.10.2006
WP1.5 meeting
Status source term + SGTR
Johan Carlsson
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IP EUROTRANS Lyon on 10.10.2006
Impact of iodine, caesium and caesium iodine in Pb-Bi System
Experiment executed at FZKObjective was to find out if the Pb-Bi liquid metals would contain the released iodine, caesium, and caesium iodide. And, to see which quantities and substances that could arise as vapours.
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IP EUROTRANS Lyon on 10.10.2006
Tests performedTest no. Substance Temperature Description Weighed
volume, Pb-Bi/g
Weighed volume, substance/g
Conc./wt.ppm
1 I 400 ºC Test w 0.09 g/kg 1001.62 0.09112 90.96
2 I 600 ºC Test w 0.09 g/kg 1000.61 0.09601 95.94
3 CsI 400 ºC Test w 0.09 g/kg 1018.94 0.09169 89.98
4 CsI 600 ºC Test w 0.09 g/kg 1002.79 0.09090 90.64
5 Cs 600 ºC Test w ~1.2 g/kg 834.85 1.0 1196.4
6 Cs 700 ºC Test w ~1.2 g/kg 835.5 1.0 1195.5
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IP EUROTRANS Lyon on 10.10.2006
• Test 1 (400 ºC, 0.09 g I)– No iodine detected
• Test 2 (600 ºC, 0.09 g I)– The membrane did not seal good enough probably and the I sublimated
• Test 3 (400 ºC, 0.09 g CsI)– No CsI detected.
• Test 4 (600 ºC, 0.09 g CsI)– No CsI detected.
• Test 5 (600 ºC, 1.2 g Cs)– Shorter duration of heating than planned. No Cs detected.
• Test 6 (700 ºC, 1.2 g Cs)– Shorter duration of heating than planned. No Cs detected in collected
liquids.
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IP EUROTRANS Lyon on 10.10.2006
Planned tests
Further experiments are planned with Cs and I at 800ºC and 900ºC. The contract has been signed at JRC and sent to FZK. Execution of experiments are planned within a year.
Possibly more experiments can be performed by NRG in the hot cells of the HFR. It would be a fuel pellet that is melted to 1700 ºC. And it would be covered by Pb or Pb-Bi. All volatile fission products would be investigated.
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IP EUROTRANS Lyon on 10.10.2006
Summary source term
The first tests up to 600ºC indicates that I, CsI, and Cs remain in the Pb-Bi and probably form lead iodide and bismuth iodide.
Cs forms an intermetallic compound, this immobilization by alloying is highly probable.
Because of experimental limitations, no demonstration of I retention at 600 ºC was possible. The new tests be performed in improved test rig at temperatures of 800 and 900ºC.
Other experiments are considered in a hot cell of NRG.
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IP EUROTRANS Lyon on 10.10.2006
• performed with CFX10• 3D geometry of a quarter of the
reactor vessel based on preliminary ELSY design
• Incompressible Pb, compressible steam. Isothermal (700 K). Volume of Fluid.
• One steam pipe contains 22 liters ~8 kg supercritical steam ( = 348 kg/m3; @221 bar,647 K)
• So far a constant injection rate of 0.3 kg/s of steam (point source, no phase change)
Steam Generator Tube Rupture
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IP EUROTRANS Lyon on 10.10.2006
velocity field normal operation
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IP EUROTRANS Lyon on 10.10.2006
density field 0-2.5 seconds
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IP EUROTRANS Lyon on 10.10.2006
velocity field 0-2.5 seconds