{"id":48757,"date":"2019-11-12T02:51:30","date_gmt":"2019-11-12T01:51:30","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/quais-sao-as-caracteristicas-dos-scwrs-definicao\/"},"modified":"2020-01-30T11:59:20","modified_gmt":"2020-01-30T10:59:20","slug":"quais-sao-as-caracteristicas-dos-scwrs-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/quais-sao-as-caracteristicas-dos-scwrs-definicao\/","title":{"rendered":"Quais s\u00e3o as caracter\u00edsticas dos SCWRs &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Caracter\u00edsticas dos SCWRs.\u00a0Os SCWRs operam a press\u00f5es acima da press\u00e3o cr\u00edtica, as propriedades da \u00e1gua no reator mudam gradualmente e continuamente.\u00a0Engenharia T\u00e9rmica<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2>Caracter\u00edsticas dos SCWRs<\/h2>\n<p><strong><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Supercritical-water-properties-density-enthalpy.png\"><img loading=\"lazy\" class=\"alignright wp-image-16212 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Supercritical-water-properties-density-enthalpy.png\" alt=\"Propriedades da \u00e1gua supercr\u00edtica\" width=\"451\" height=\"496\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Supercritical-water-properties-density-enthalpy.png\" \/><\/a>Os SCWRs<\/strong>\u00a0operam a press\u00f5es acima da press\u00e3o cr\u00edtica, as propriedades da \u00e1gua no reator mudam\u00a0<strong>gradualmente<\/strong>\u00a0e\u00a0<strong>continuamente<\/strong>\u00a0daquelas que normalmente associamos a um l\u00edquido (alta densidade, pequena compressibilidade) e \u00e0s de um g\u00e1s (baixa densidade, grande compressibilidade)\u00a0<strong>sem uma mudan\u00e7a de fase<\/strong>\u00a0.\u00a0N\u00e3o h\u00e1 mudan\u00e7a na fase da \u00e1gua no n\u00facleo.\u00a0Por outro lado, propriedades f\u00edsicas como densidade, calor espec\u00edfico e entalpia espec\u00edfica sofrem altera\u00e7\u00f5es significativas, principalmente na faixa de temperatura da regi\u00e3o pseudocr\u00edtica (para 25 MPa entre 372 \u00b0 C e 392 \u00b0 C).\u00a0Por exemplo,<\/p>\n<ul>\n<li>a\u00a0<strong>densidade<\/strong>\u00a0da \u00e1gua supercr\u00edtica na entrada e na sa\u00edda \u00e9 de cerca de\u00a0<strong>777 kg \/ m\u00a0<\/strong><sup><strong>3<\/strong><\/sup>\u00a0(por 25MPa e 280 \u00b0 C) e\u00a0<strong>90 kg \/ m\u00a0<sup>3<\/sup><\/strong>\u00a0(por 25MPa e 500 \u00b0 C),<\/li>\n<li>a\u00a0<strong>entalpia espec\u00edfica<\/strong>\u00a0da \u00e1gua supercr\u00edtica na entrada e na sa\u00edda \u00e9 de cerca de\u00a0<strong>1230 kJ \/ kg<\/strong>\u00a0(para 25MPa e 280 \u00b0 C) e\u00a0<strong>3165 kJ \/ kg<\/strong>\u00a0(para 25MPa e 500 \u00b0 C)<\/li>\n<\/ul>\n<p>Do ponto de vista neutr\u00f4nico, a densidade da \u00e1gua \u00e9 o fator mais importante.\u00a0H\u00e1 uma mudan\u00e7a significativa no\u00a0<a title=\"Espectros de fluxo de n\u00eautrons\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/nuclear-engineering-fundamentals\/neutron-nuclear-reactions\/neutron-flux-spectra\/\">espectro<\/a>\u00a0de\u00a0<a title=\"Espectros de fluxo de n\u00eautrons\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/nuclear-engineering-fundamentals\/neutron-nuclear-reactions\/neutron-flux-spectra\/\">n\u00eautrons<\/a>\u00a0, que muda com a coordenada axial do n\u00facleo.\u00a0\u00c9 causada pela maior\u00a0<a title=\"Moderador de n\u00eautrons\" href=\"https:\/\/www.nuclear-power.com\/neutron-moderator\/\">modera\u00e7\u00e3o<\/a>\u00a0em locais com maior densidade.\u00a0Por esse motivo, um c\u00e1lculo acoplado de n\u00eautrons &#8211; hidr\u00e1ulica t\u00e9rmica \u00e9 inevit\u00e1vel para obter\u00a0<a title=\"Distribui\u00e7\u00e3o de energia em reatores convencionais\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/neutron-diffusion-theory\/power-distribution-conventional-reactors\/\">a distribui\u00e7\u00e3o do fluxo de n\u00eautrons<\/a>\u00a0no n\u00facleo.\u00a0Em cada\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-reactor\/\">reator nuclear<\/a>\u00a0, h\u00e1 uma\u00a0<strong>proporcionalidade direta<\/strong>\u00a0entre o\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/nuclear-engineering-fundamentals\/neutron-nuclear-reactions\/neutron-flux-neutron-intensity\/\"><strong>fluxo de n\u00eautrons<\/strong><\/a>e a\u00a0<strong>energia t\u00e9rmica<\/strong>\u00a0do\u00a0<strong>reator<\/strong>\u00a0.<\/p>\n<p>Como o refrigerante (moderador) sofre uma mudan\u00e7a significativa na densidade, o SCWR tamb\u00e9m pode ser projetado como um reator r\u00e1pido de n\u00eautrons. Essa propriedade depende de determinado projeto do reator.<\/p>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights  lgc-first lgc-last\">\n<div class=\"inside-grid-column\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/supercritical-water-reactor-SCWR-parameters.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-16213 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/supercritical-water-reactor-SCWR-parameters.png\" alt=\"Caracter\u00edsticas dos SCWRs\" width=\"879\" height=\"868\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/supercritical-water-reactor-SCWR-parameters.png\" \/><\/a><\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights  lgc-first lgc-last\">\n<div class=\"inside-grid-column\"><\/div>\n<\/div>\n<p>&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.<\/p>\n<p>Este artigo \u00e9 baseado na tradu\u00e7\u00e3o autom\u00e1tica do artigo original em ingl\u00eas. Para mais informa\u00e7\u00f5es, consulte o artigo em ingl\u00eas. Voc\u00ea pode nos ajudar. Se voc\u00ea deseja corrigir a tradu\u00e7\u00e3o, envie-a para: translations@nuclear-power.com ou preencha o formul\u00e1rio de tradu\u00e7\u00e3o on-line. Agradecemos sua ajuda, atualizaremos a tradu\u00e7\u00e3o o mais r\u00e1pido poss\u00edvel. Obrigado.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Caracter\u00edsticas dos SCWRs.\u00a0Os SCWRs operam a press\u00f5es acima da press\u00e3o cr\u00edtica, as propriedades da \u00e1gua no reator mudam gradualmente e continuamente.\u00a0Engenharia T\u00e9rmica Caracter\u00edsticas dos SCWRs Os SCWRs\u00a0operam a press\u00f5es acima da press\u00e3o cr\u00edtica, as propriedades da \u00e1gua no reator mudam\u00a0gradualmente\u00a0e\u00a0continuamente\u00a0daquelas que normalmente associamos a um l\u00edquido (alta densidade, pequena compressibilidade) e \u00e0s de um g\u00e1s &#8230; <a title=\"Quais s\u00e3o as caracter\u00edsticas dos SCWRs &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/quais-sao-as-caracteristicas-dos-scwrs-definicao\/\" aria-label=\"More on Quais s\u00e3o as caracter\u00edsticas dos SCWRs &#8211; Defini\u00e7\u00e3o\">Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Quais s\u00e3o as caracter\u00edsticas dos SCWRs - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Caracter\u00edsticas dos SCWRs. 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