stable reactor period
51Nitrogen — carbon ← nitrogen → oxygen ↑ N ↓ P …
52Hanford Site — The Hanford Site is a decommissioned nuclear production complex on the Columbia River in south central Washington operated by the United States government. The site has been known by many names, including Hanford Works, Hanford Engineer Works,… …
53Nuclear poison — A nuclear poison, also called a neutron poison is a substance with a large neutron absorption cross section in applications, such as nuclear reactors, when absorbing neutrons is an undesirable effect. However neutron absorbing materials, also… …
54metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… …
55Ukraine — Infobox Country native name =Україна Ukrayina conventional long name =Ukraine common name =Ukraine map caption =map caption|region=on the European continent national anthem =Ще не вмерла України ні слава, ні воляspaces|2(Ukrainian) Shche ne… …
56Anaerobic digestion — and regenerative thermal oxidiser component of Lübeck mechanical biological treatment plant in Germany, 2007 …
57UNITED STATES OF AMERICA — UNITED STATES OF AMERICA, country in N. America. This article is arranged according to the following outline: introduction Colonial Era, 1654–1776 Early National Period, 1776–1820 German Jewish Period, 1820–1880 East European Jewish Period,… …
58Thermionic converter — A thermionic converter consists of a hot electrode which thermionically emits electrons over a potential energy barrier to a cooler electrode, producing a useful electric power output. Caesium vapor is used to optimize the electrode work… …
59international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …
60Sweden — /sweed n/, n. a kingdom in N Europe, in the E part of the Scandinavian Peninsula. 8,946,193; 173,732 sq. mi. (449,964 sq. km). Cap.: Stockholm. Swedish, Sverige. * * * Sweden Introduction Sweden Background: A military power during the 17th… …
