Stainless steel Release rate evaluation in ITER
operating conditions-Synthesis of the campaign
2004-2005
DTN / STRI / LTCD – EFDA Meeting 28 / 03/ 06
1
ITER campaign - 1m/s
100
Fe(Mn54 + Fe59)
Ni (Co 58)
Cr(cr51)
10
autre
Fe (Mn54)
²/
mois
mg
/dm
1
0,1
0,01
100
150
DTN / STRI / LTCD – EFDA Meeting 28 / 03/ 06
200
Global release rate
Fe(Mn 54) release rate represents 46% of the global
release rate
ITER campaign
100
10
²/
mois
/dm
mg
1
0,1
0,01
100
150
200
Fe (Mn54)
DTN / STRI / LTCD – EFDA Meeting 28 / 03/ 06
Conclusion
As far as this comparison is relevant the following results
can be interpreted :
At 200°C :
• Thermodynamic equilibrium is favored compared to O2
diffusional limitation
At 150°C :
• Optimum between the O2 solid diffusion and
thermodynamics
At 100°C
• The O2 solid diffusion (corrosion) is strongly limited
These tests revealed also the influence of Reynolds number
instead of velocity on the release rate.
DTN / STRI / LTCD – EFDA Meeting 28 / 03/ 06