US 12,130,009 B2
Helical baffle for once-through steam generator
Kareem M. A. Aly, Charlotte, NC (US)
Assigned to BWXT Canada Ltd., Cambridge (CA)
Filed by BWXT Canada Ltd., Cambridge (CA)
Filed on Jul. 21, 2020, as Appl. No. 16/934,822.
Application 16/934,822 is a continuation of application No. PCT/IB2018/053203, filed on May 8, 2018.
Claims priority of provisional application 62/625,791, filed on Feb. 2, 2018.
Prior Publication US 2020/0393123 A1, Dec. 17, 2020
Int. Cl. F22B 1/02 (2006.01); F22B 1/06 (2006.01); F22B 1/16 (2006.01); F22B 37/00 (2006.01); F28D 7/16 (2006.01); F28F 9/22 (2006.01)
CPC F22B 1/028 (2013.01) [F28D 7/16 (2013.01); F28F 9/22 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A steam generator comprising:
a shroud having a top and a bottom;
an annular stepwise helical baffle extending along at least part of a length of said shroud;
a shelter located in a central region of said steam generator;
a tube bundle region within said steam generator, said tube bundle region comprising a plurality of tubes;
wherein said helical baffle comprises an annular sector comprising flat plates, each of said flat plates having at least one side edge; and
wherein said shelter comprises a plurality of straight panels inserted along said tube bundle, said panels positioned such that said tube bundle is divided into an outer tube bundle region and a central tube bundle region.