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The Pebble Bed Modular Reactor (PBMR) is a particular design of pebble bed reactor developed by South African company PBMR (Pty) Ltd from 1994 until 2009. [1] PBMR facilities include gas turbine and heat transfer labs at the Potchefstroom Campus of North-West University, and at Pelindaba, a high pressure and temperature helium test rig, as well as a prototype fuel fabrication plant. [2]
A pebble-bed power plant combines a gas-cooled core [5] and a novel fuel packaging. [6]The uranium, thorium or plutonium nuclear fuels are in the form of a ceramic (usually oxides or carbides) contained within spherical pebbles a little smaller than the size of a tennis ball and made of pyrolytic graphite, which acts as the primary neutron moderator.
Pebbledash Pebbledashing Rock dash stucco. Roughcast or pebbledash is a durable coarse plaster surface used on outside walls that consists of lime and sometimes cement mixed with sand, small gravel and often pebbles or shells. [1]
The Makapansgat pebble is a 260-gram, 8.3 cm long, 7 cm wide, and 3.8 cm thick, reddish-brown jasperite cobble. [2]The pebble was found in 1925 in a dolomite cave in the Makapan Valley north of Mokopane, South Africa by local school teacher Wilfred Eitzman. [3]
A desert pavement, also called reg (in western Sahara), serir (in eastern Sahara), gibber (in Australia), or saï (in central Asia) [1] is a desert surface covered with closely packed, interlocking angular or rounded rock fragments of pebble and cobble size. They typically top alluvial fans. [2]
This is a list of countries (or regions) by total road network size, both paved and unpaved.Also included is additional data on road network density and the length of each country or region's controlled-access highway network (also known as a motorway, expressway, freeway, etc.), designed for high vehicular traffic.
per km 2 per sq mi Abaqulusi Local Municipality: KZN263 KwaZulu-Natal: Zululand: Vryheid: B3 (small towns) 4,314 2,681 243,795 56.5 90.9 Albert Luthuli Local Municipality: MP301 Mpumalanga: Gert Sibande: Carolina: B4 (mostly rural) 5,559 3,454 187,629 33.7 54.2 Alfred Duma Local Municipality: KZN238 KwaZulu-Natal: Uthukela: Ladysmith: B2 (large ...
ArcelorMittal South Africa is part of the steel company Arcelor-Mittal. [ 1 ] [ 2 ] The company was originally Iscor Ltd. , a South African parastatal steel company. It was founded in 1928 and was first listed on the JSE Securities Exchange in 1989.