Considerations on Basic Requirements of Fueling, Plasma Exhaust and Wall Conditioning in ITER
Fusion Science and Technology / Volume 28 / Number 3P1 / October 1995 / Pages 705-710
Tritium Processing / Proceedings of the Fifth Topical Meeting on Tritium Technology in Fission, Fusion, and Isotopic Applications Belgirate, Italy May 28-June 3, 1995 / dx.doi.org/10.13182/FST95-A30487
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This paper presents considerations on basic requirements of fuelling, plasma exhaust and wall conditioning in ITER-EDA. In ITER-EDA, typical machine parameters are 1.5 GW of a fusion power and 1000 sec of a DT burn duration. Fuelling system consists of gas- and pellet injection systems. Maximum DT fuelling rate is 100 Pam3/s (pellet) to 500 Pam3/s (gas). Impurity gas(e.g. Ne, Ar) will be also injected to control divertor radiation loss. In plasma exhaust, designed value of total neutral pressure at inlet of pumping duct is 0.1 Pa to 10 Pa. Total net pumping speed of cryogenic primary pumps is about 300 m3/sec. In maximum, 90% of the regenerated fuel gases (H, D, T) from the primary cryopump will be directly back into the plasma. In wall conditioning, glow discharge cleaning (GDC) and electron cyclotron resonance discharge cleaning (ECRDC) are considered.
