Fusion Engineering and Design 81 (2006) 2623–2631
Helium refrigeration system for the KSTAR
C.H. Choi
a,c, ∗
, H.-S. Chang
a,c
, D.S. Park
a,c
, Y.S. Kim
a,c
, J.S. Bak
a,c
, G.S. Lee
a,c
,
I.K. Kwon
b,c
, H.M. Kim
b,c
, M.C. Cho
b,c
, H.-S. Kim
c,e
, E. Fauve
c,d
, I. Abe
c,d
,
P. Briend
c,d
, J.-M. Bernhardt
c,d
, Y. Cardet
c,d
, P. Dauguet
c,d
, J. Beauvisage
c,d
,
F. Andrieu
c,d
, S.-H. Yang
c,e
, G.M. Gistau Baguer
c,f
a
National Fusion Research Center, 52 Yeoeun-Dong, Yusung-Gu, Daejeon 305-333, Republic of Korea
b
Samsung Engineering and Construction Corporation, 263 Seohyun-Dong, Bundang-Gu, Sungnam-Si,
Gyonggi-Do 463-721, Republic of Korea
c
Daewoo Engineering and Construction Corporation, C.P.O. Box 8269, Seoul 100-714, Republic of Korea
d
Air Liquide-Advanced Technologies Division, 38360 Sassenage, France
e
Cryogenic Engineering Inc., 1010 Madu-Dong, Ilsan-Gu, Goyang-Si, Gyonggi-Do 411-718,
Republic of Korea
f
Biviers 38330, France
Available online 22 August 2006
Abstract
The KSTAR, a tokamak with fully superconducting (SC) magnets, is under construction in the National Fusion Research
Center (NFRC). For the proper operation of the KSTAR, the superconducting magnets have to be maintained below the critical
temperature of the SC components while charged at their corresponding operation current values. In this paper, a large scale
helium refrigeration system (HRS) which has been designed and developed to fulfill such a mission is presented.
The cold components of the KSTAR are kept at their operating temperatures thanks to various kinds of cryogenic helium
which are produced in the cold box (C/B) of the HRS in combination with the supercritical helium (SHe) cryogenic circu-
lators and a liquid helium (LHe) thermal damper (TD) located in the primary helium distribution box (D/B #1). The relative
distribution of the cryogenic helium among the cooling channels of each cold component of the KSTAR is performed by the
secondary helium distribution system which consists of the secondary distribution box (D/B #2) and the cryogenic transfer lines
(CTL’s).
© 2006 Elsevier B.V. All rights reserved.
PACS: 52.55.Fa; 07.20.Mc
Keywords: KSTAR; Tokamak; Superconducting magnet; Helium refrigerator
KSTAR: Korea Superconducting Tokamak Advanced Research.
∗
Corresponding author. Tel.: +82 42 870 1710; fax: +82 42 870 1709.
E-mail address: chchoi@nfrc.re.kr (C.H. Choi).
0920-3796/$ – see front matter © 2006 Elsevier B.V. All rights reserved.
doi:10.1016/j.fusengdes.2006.07.019