MHD work related to a self-cooled Pb-17Li blanket with poloidal-radial-toroidal ducts

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:196892

Reimann, J; Barleon, L; Buehler, L ^[1]

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1. IATF, Karlsruhe (Germany); and others

For self cooled liquid metal blankets MHD pressure drop and velocity distributions are considered as critical issues. This paper summarizes MHD work performed for a DEMO-relevant Pb-17Li blanket which uses essential characteristics of a previous ANL design: The coolant flows downwards in the rear poloidal ducts, turns by 180{degrees} at the blanket bottom and is distributed from the ascending poloidal ducts into short radial channels which feed the toroidal First Wall coolant ducts (aligned with the main magnetic field direction). The flow through the subsequent radial channels is collected again in poloidal channels and the coolant leaves the blanket segment at the top. The blanket design is based on the use of flow channel inserts (FCIs) (which means electrically thin conducting walls for MHD) for all ducts except for the toroidal FW coolant channels. MHD related issues were defined and estimations of corresponding pressure drops were performed. Previous experimental work included a proof of principle of FCIs and a detailed experiment with a single {open_quotes}poloidal{sm_bullet}toroidal{sm_bullet}poloidal{close_quotes} duct (cooperation with ANL). In parallel, a numerical code based on the Core Flow Approximation (CFA) was developed to predict pressure drop and velocity distributions for arbitrary single duct geometries.

• OSTI ID: 196892
• Report Number(s): CONF-940664--
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BREEDING BLANKETS
FLUID FLOW
HEAT TRANSFER
LEAD BASE ALLOYS
LIQUID METALS
LITHIUM ALLOYS
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
PRESSURE DROP
SELF-PUMPING SYSTEMS
THERMONUCLEAR REACTOR COOLING SYSTEMS