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<div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Posicionamiento</span> </div> </a> <ul id="toc-Posicionamiento-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Margen_de_parada" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Margen_de_parada"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Margen de parada</span> </div> </a> <ul id="toc-Margen_de_parada-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Historia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Historia"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Historia</span> </div> </a> <ul id="toc-Historia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Véase_también" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Véase_también"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Véase también</span> </div> </a> <ul id="toc-Véase_también-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referencias" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referencias"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Referencias</span> </div> </a> <ul id="toc-Referencias-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contenidos" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Cambiar a la tabla de contenidos" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Cambiar a la tabla de contenidos</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Barras de control</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ir a un artículo en otro idioma. Disponible en 25 idiomas" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-25" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">25 idiomas</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%82%D8%B6%D9%8A%D8%A8_%D8%AA%D8%AD%D9%83%D9%85" title="قضيب تحكم (árabe)" lang="ar" hreflang="ar" data-title="قضيب تحكم" data-language-autonym="العربية" data-language-local-name="árabe" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Barra_de_control" title="Barra de control (catalán)" lang="ca" hreflang="ca" data-title="Barra de control" data-language-autonym="Català" data-language-local-name="catalán" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Regula%C4%8Dn%C3%AD_ty%C4%8D" title="Regulační tyč (checo)" lang="cs" hreflang="cs" data-title="Regulační tyč" data-language-autonym="Čeština" data-language-local-name="checo" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Steuerstab" title="Steuerstab (alemán)" lang="de" hreflang="de" data-title="Steuerstab" data-language-autonym="Deutsch" data-language-local-name="alemán" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Control_rod" title="Control rod (inglés)" lang="en" hreflang="en" data-title="Control rod" data-language-autonym="English" data-language-local-name="inglés" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Reguliga_stango" title="Reguliga stango (esperanto)" lang="eo" hreflang="eo" data-title="Reguliga stango" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Kontrol_barrak" title="Kontrol barrak (euskera)" lang="eu" hreflang="eu" data-title="Kontrol barrak" data-language-autonym="Euskara" data-language-local-name="euskera" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%85%DB%8C%D9%84%D9%87_%DA%A9%D9%86%D8%AA%D8%B1%D9%84" title="میله کنترل (persa)" lang="fa" hreflang="fa" data-title="میله کنترل" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Barre_de_contr%C3%B4le_(nucl%C3%A9aire)" title="Barre de contrôle (nucléaire) (francés)" lang="fr" hreflang="fr" data-title="Barre de contrôle (nucléaire)" data-language-autonym="Français" data-language-local-name="francés" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%A8%E0%A5%8D%E0%A4%A4%E0%A5%8D%E0%A4%B0%E0%A4%A3_%E0%A4%9B%E0%A4%A1%E0%A4%BC%E0%A5%87%E0%A4%82_(%E0%A4%95%E0%A4%A8%E0%A5%8D%E0%A4%9F%E0%A5%8D%E0%A4%B0%E0%A5%8B%E0%A4%B2_%E0%A4%B0%E0%A5%89%E0%A4%A1)" title="नियन्त्रण छड़ें (कन्ट्रोल रॉड) (hindi)" lang="hi" hreflang="hi" data-title="नियन्त्रण छड़ें (कन्ट्रोल रॉड)" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Szab%C3%A1lyz%C3%B3r%C3%BAd" title="Szabályzórúd (húngaro)" lang="hu" hreflang="hu" data-title="Szabályzórúd" data-language-autonym="Magyar" data-language-local-name="húngaro" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Batang_kendali_(reaktor_nuklir)" title="Batang kendali (reaktor nuklir) (indonesio)" lang="id" hreflang="id" data-title="Batang kendali (reaktor nuklir)" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesio" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Barre_di_moderazione" title="Barre di moderazione (italiano)" lang="it" hreflang="it" data-title="Barre di moderazione" data-language-autonym="Italiano" data-language-local-name="italiano" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%88%B6%E5%BE%A1%E6%A3%92" title="制御棒 (japonés)" lang="ja" hreflang="ja" data-title="制御棒" data-language-autonym="日本語" data-language-local-name="japonés" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%A0%9C%EC%96%B4%EB%B4%89" title="제어봉 (coreano)" lang="ko" hreflang="ko" data-title="제어봉" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Regelstaaf" title="Regelstaaf (neerlandés)" lang="nl" hreflang="nl" data-title="Regelstaaf" data-language-autonym="Nederlands" data-language-local-name="neerlandés" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Pr%C4%99t_kontrolny" title="Pręt kontrolny (polaco)" lang="pl" hreflang="pl" data-title="Pręt kontrolny" data-language-autonym="Polski" data-language-local-name="polaco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Hastes_de_controle" title="Hastes de controle (portugués)" lang="pt" hreflang="pt" data-title="Hastes de controle" data-language-autonym="Português" data-language-local-name="portugués" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%90%D0%B2%D0%B0%D1%80%D0%B8%D0%B9%D0%BD%D0%B0%D1%8F_%D1%80%D0%B5%D0%B3%D1%83%D0%BB%D0%B8%D1%80%D1%83%D1%8E%D1%89%D0%B0%D1%8F_%D0%BA%D0%B0%D1%81%D1%81%D0%B5%D1%82%D0%B0" title="Аварийная регулирующая кассета (ruso)" lang="ru" hreflang="ru" data-title="Аварийная регулирующая кассета" data-language-autonym="Русский" data-language-local-name="ruso" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Regula%C4%8Dn%C3%A1_ty%C4%8D" title="Regulačná tyč (eslovaco)" lang="sk" hreflang="sk" data-title="Regulačná tyč" data-language-autonym="Slovenčina" data-language-local-name="eslovaco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Styrstav" title="Styrstav (sueco)" lang="sv" hreflang="sv" data-title="Styrstav" data-language-autonym="Svenska" data-language-local-name="sueco" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%95%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AF%81%E0%AE%AA%E0%AF%8D%E0%AE%AA%E0%AE%BE%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AF%81%E0%AE%95%E0%AF%8D_%E0%AE%95%E0%AF%8B%E0%AE%B2%E0%AF%8D" title="கட்டுப்பாட்டுக் கோல் (tamil)" lang="ta" hreflang="ta" data-title="கட்டுப்பாட்டுக் கோல்" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%81%E0%B8%97%E0%B9%88%E0%B8%87%E0%B8%84%E0%B8%A7%E0%B8%9A%E0%B8%84%E0%B8%B8%E0%B8%A1" title="แท่งควบคุม (tailandés)" lang="th" hreflang="th" data-title="แท่งควบคุม" data-language-autonym="ไทย" data-language-local-name="tailandés" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%90%D0%B2%D0%B0%D1%80%D1%96%D0%B9%D0%BD%D0%B0_%D1%80%D0%B5%D0%B3%D1%83%D0%BB%D1%8E%D1%8E%D1%87%D0%B0_%D0%BA%D0%B0%D1%81%D0%B5%D1%82%D0%B0" title="Аварійна регулююча касета (ucraniano)" lang="uk" hreflang="uk" data-title="Аварійна регулююча касета" data-language-autonym="Українська" data-language-local-name="ucraniano" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%8E%A7%E5%88%B6%E6%A3%92" title="控制棒 (chino)" lang="zh" hreflang="zh" data-title="控制棒" data-language-autonym="中文" data-language-local-name="chino" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q615306#sitelinks-wikipedia" title="Editar enlaces interlingüísticos" class="wbc-editpage">Editar enlaces</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Espacios de nombres"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Barras_de_control" title="Ver la página de contenido [c]" accesskey="c"><span>Artículo</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Discusi%C3%B3n:Barras_de_control&action=edit&redlink=1" rel="discussion" class="new" title="Discusión acerca de la página (aún no redactado) [t]" accesskey="t"><span>Discusión</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Cambiar variante de idioma" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">español</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Vistas"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Barras_de_control"><span>Leer</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Barras_de_control&action=edit" title="Editar esta página [e]" accesskey="e"><span>Editar</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Barras_de_control&action=history" title="Versiones anteriores de esta página [h]" accesskey="h"><span>Ver historial</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Página de herramientas"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Herramientas" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Herramientas</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Herramientas</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">mover a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">ocultar</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Más opciones" > <div class="vector-menu-heading"> Acciones </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Barras_de_control"><span>Leer</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Barras_de_control&action=edit" title="Editar esta página [e]" accesskey="e"><span>Editar</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Barras_de_control&action=history"><span>Ver historial</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Especial:LoQueEnlazaAqu%C3%AD/Barras_de_control" title="Lista de todas las páginas de la wiki que enlazan aquí [j]" accesskey="j"><span>Lo que enlaza aquí</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Especial:CambiosEnEnlazadas/Barras_de_control" rel="nofollow" title="Cambios recientes en las páginas que enlazan con esta [k]" accesskey="k"><span>Cambios en enlazadas</span></a></li><li id="t-upload" class="mw-list-item"><a href="//commons.wikimedia.org/wiki/Special:UploadWizard?uselang=es" title="Subir archivos [u]" accesskey="u"><span>Subir archivo</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Especial:P%C3%A1ginasEspeciales" title="Lista de todas las páginas especiales [q]" accesskey="q"><span>Páginas especiales</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Barras_de_control&oldid=151591195" title="Enlace permanente a esta versión de la página"><span>Enlace permanente</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Barras_de_control&action=info" title="Más información sobre esta página"><span>Información de la página</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Especial:Citar&page=Barras_de_control&id=151591195&wpFormIdentifier=titleform" title="Información sobre cómo citar esta página"><span>Citar esta 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class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Página de herramientas"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Apariencia"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Apariencia</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mover a la barra lateral</button> <button 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src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Commons-emblem-question_book_orange.svg/40px-Commons-emblem-question_book_orange.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Commons-emblem-question_book_orange.svg/60px-Commons-emblem-question_book_orange.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Commons-emblem-question_book_orange.svg/80px-Commons-emblem-question_book_orange.svg.png 2x" data-file-width="48" data-file-height="48" /></a></span></td> <td class="ambox-text"><div class="ambox-text-div"><strong>Este artículo o sección necesita <a href="/wiki/Wikipedia:VER" class="mw-redirect" title="Wikipedia:VER">referencias</a> que aparezcan en una <a href="/wiki/Wikipedia:FF" class="mw-redirect" title="Wikipedia:FF">publicación acreditada</a>.</strong> <span class="hide-when-compact"><br /> <span style="font-size: smaller;"><i>Busca fuentes:</i> <span class="plainlinks"><a rel="nofollow" class="external text" href="http://www.google.com/search?as_eq=wikipedia&q=%22Barras+de+control%22&num=50">«Barras de control»</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&&as_src=-newswire+-wire+-presswire+-PR+-press+-release+-wikipedia&q=%22Barras+de+control%22">noticias</a> · <a rel="nofollow" class="external text" href="http://books.google.com/books?as_brr=0&as_pub=-icon&q=%22Barras+de+control%22">libros</a> · <a rel="nofollow" class="external text" href="http://scholar.google.com/scholar?q=%22Barras+de+control%22">académico</a> · <a rel="nofollow" class="external text" href="http://images.google.com/images?safe=off&as_rights=(cc_publicdomain%7ccc_attribute%7ccc_sharealike%7ccc_noncommercial%7ccc_nonderived)&q=%22Barras+de+control%22">imágenes</a></span></span></span></div><div class="hide-when-compact"><small><div>Este aviso fue puesto el 16 de septiembre de 2010.</div></small></div></td> </tr> </tbody></table> <figure typeof="mw:File/Thumb"><a href="/wiki/Archivo:Rbmk_fuel_rods_holder.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Rbmk_fuel_rods_holder.png/150px-Rbmk_fuel_rods_holder.png" decoding="async" width="150" height="381" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Rbmk_fuel_rods_holder.png/225px-Rbmk_fuel_rods_holder.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Rbmk_fuel_rods_holder.png/300px-Rbmk_fuel_rods_holder.png 2x" data-file-width="685" data-file-height="1739" /></a><figcaption>Barras de combustible y de control de un reactor nuclear.</figcaption></figure> <p><b>Barras de control</b> consisten en barras hechas normalmente de <a href="/wiki/Acero" title="Acero">acero</a> al <a href="/wiki/Boro" title="Boro">boro</a>,<sup id="cite_ref-1" class="reference separada"><a href="#cite_note-1"><span class="corchete-llamada">[</span>1<span class="corchete-llamada">]</span></a></sup> de una aleación de <a href="/wiki/Plata" title="Plata">plata</a> y <a href="/wiki/Cadmio" title="Cadmio">cadmio</a> que tiene gran capacidad de absorción de <a href="/wiki/Neutr%C3%B3n" title="Neutrón">neutrones</a> o de <a href="/wiki/Hafnio" title="Hafnio">hafnio</a>, aunque este suele usarse en los reactores nucleares de algunos <a href="/wiki/Submarino" title="Submarino">submarinos</a> y recubiertas de <a href="/wiki/Circonio" title="Circonio">circonio</a>. </p><p>Se usan para controlar la reacción de <a href="/wiki/Fisi%C3%B3n_nuclear" title="Fisión nuclear">fisión nuclear</a> en las centrales nucleares. Para ello se introducen por unos huecos entre las vainas del combustible nuclear de un reactor, de esta forma se consigue absorber neutrones y así poder controlar, y finalmente detener el reactor.<sup id="cite_ref-2" class="reference separada"><a href="#cite_note-2"><span class="corchete-llamada">[</span>2<span class="corchete-llamada">]</span></a></sup> En los antiguos reactores de tipo <a href="/wiki/RBMK" title="RBMK">RBMK</a> (de los cuales aún existen algunos en funcionamiento), las barras de control tardan alrededor de 20 segundos en bajarse completamente, lo que ocasionaba un grave problema de seguridad. Pero en los reactores más modernos, el mecanismo de bajada de estas barras permite realizarla en 1 segundo, deteniendo la <a href="/wiki/Reacci%C3%B3n_nuclear_en_cadena" title="Reacción nuclear en cadena">reacción nuclear en cadena</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Posicionamiento">Posicionamiento</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Barras_de_control&action=edit&section=1" title="Editar sección: Posicionamiento"><span>editar</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Las barras se agrupan en bancos, de forma que todas las barras de un banco se mueven a la vez. Las barras de un banco están situadas simétricamente en el núcleo para no provocar una distorsión radial del flujo durante su movimiento. </p> <div class="mw-heading mw-heading2"><h2 id="Margen_de_parada">Margen de parada</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Barras_de_control&action=edit&section=2" title="Editar sección: Margen de parada"><span>editar</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Se define como la cantidad instantánea de reactividad por la cual el reactor se haría subcrítico suponiendo que todos los bancos estén insertados en el núcleo menos el de mayor antireactividad. Mediante el margen de parada se asegura que: </p> <ol><li>El reactor puede hacerse subcrítico desde todas las condiciones operativas.</li> <li>Los transitorios de reactividad son controlables dentro de los límites aceptables.</li> <li>El reactor se mantendrá lo suficentemente subcrítico como para evitar la criticidad accidental en la condición de parada.</li></ol> <div class="mw-heading mw-heading2"><h2 id="Historia">Historia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Barras_de_control&action=edit&section=3" title="Editar sección: Historia"><span>editar</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Tras el descubrimiento de la fisión nuclear del <a href="/wiki/Uranio-235" title="Uranio-235">uranio-235</a> por <a href="/wiki/Otto_Hahn" title="Otto Hahn">Otto Hahn</a>, <a href="/wiki/Lise_Meitner" title="Lise Meitner">Lise Meitner</a> y <a href="/w/index.php?title=Fritz_Strassman&action=edit&redlink=1" class="new" title="Fritz Strassman (aún no redactado)">Fritz Strassman</a> en 1939 debida al bombardeo de neutrones, <a href="/wiki/Enrico_Fermi" title="Enrico Fermi">Enrico Fermi</a> pensó en la construcción de una pila en la que se dieran esas reacciones liberadoras de calor. Para construir dicha pila, necesitaba controlar la reacción y usó discos de <a href="/wiki/Cadmio" title="Cadmio">cadmio</a> (ya que el uranio se apilaba en columnas de discos) para regular el flujo de <a href="/wiki/Neutrones" class="mw-redirect" title="Neutrones">neutrones</a> y así evitar el efecto explosivo.<sup id="cite_ref-3" class="reference separada"><a href="#cite_note-3"><span class="corchete-llamada">[</span>3<span class="corchete-llamada">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Véase_también"><span id="V.C3.A9ase_tambi.C3.A9n"></span>Véase también</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Barras_de_control&action=edit&section=4" title="Editar sección: Véase también"><span>editar</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Moderador_nuclear" title="Moderador nuclear">Moderador nuclear</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Referencias">Referencias</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Barras_de_control&action=edit&section=5" title="Editar sección: Referencias"><span>editar</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="listaref" style="list-style-type: decimal;"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><span id="CITAREFErcillaMuñoz2003" class="citation libro">Ercilla, Santiago Burbano de; Muñoz, Carlos Gracia (2003). <a rel="nofollow" class="external text" href="https://books.google.es/books?id=BWgSWTYofiIC&pg=PA755&dq=Barras+de+control++reacci%C3%B3n+metros&hl=es&sa=X&ved=0ahUKEwjrtb2mucbYAhWC6xQKHbRdAbAQ6AEIJzAA#v=onepage&q=Barras%20de%20control%20%20reacci%C3%B3n%20metros&f=false"><i>Física general</i></a>. Editorial Tebar. <small><a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Especial:FuentesDeLibros/9788495447821" title="Especial:FuentesDeLibros/9788495447821">9788495447821</a></small><span class="reference-accessdate">. Consultado el 7 de enero de 2018</span>.</span><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fes.wikipedia.org%3ABarras+de+control&rft.au=Ercilla%2C+Santiago+Burbano+de&rft.au=Mu%C3%B1oz%2C+Carlos+Gracia&rft.aufirst=Santiago+Burbano+de&rft.aulast=Ercilla&rft.btitle=F%C3%ADsica+general&rft.date=2003&rft.genre=book&rft.isbn=9788495447821&rft.pub=Editorial+Tebar&rft_id=https%3A%2F%2Fbooks.google.es%2Fbooks%3Fid%3DBWgSWTYofiIC%26pg%3DPA755%26dq%3DBarras%2Bde%2Bcontrol%2B%2Breacci%25C3%25B3n%2Bmetros%26hl%3Des%26sa%3DX%26ved%3D0ahUKEwjrtb2mucbYAhWC6xQKHbRdAbAQ6AEIJzAA%23v%3Donepage%26q%3DBarras%2520de%2520control%2520%2520reacci%25C3%25B3n%2520metros%26f%3Dfalse&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><span id="CITAREFFinkBeatyCarroll1981" class="citation libro">Fink, Donald G.; Beaty, H. Wayne; Carroll, John M. (1981). <a rel="nofollow" class="external text" href="https://books.google.es/books?id=FlfXjS1N-PIC&pg=SA9-PA59&dq=Barras+de+control++se+introducen&hl=es&sa=X&ved=0ahUKEwiz192busbYAhVMVhQKHTn0B7kQ6AEILjAB#v=onepage&q=Barras%20de%20control%20%20se%20introducen&f=false"><i>Manual práctico electricidad ingenieros</i></a>. Reverte. <small><a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Especial:FuentesDeLibros/9788429130263" title="Especial:FuentesDeLibros/9788429130263">9788429130263</a></small><span class="reference-accessdate">. Consultado el 7 de enero de 2018</span>.</span><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fes.wikipedia.org%3ABarras+de+control&rft.au=Beaty%2C+H.+Wayne&rft.au=Carroll%2C+John+M.&rft.au=Fink%2C+Donald+G.&rft.aufirst=Donald+G.&rft.aulast=Fink&rft.btitle=Manual+pr%C3%A1ctico+electricidad+ingenieros&rft.date=1981&rft.genre=book&rft.isbn=9788429130263&rft.pub=Reverte&rft_id=https%3A%2F%2Fbooks.google.es%2Fbooks%3Fid%3DFlfXjS1N-PIC%26pg%3DSA9-PA59%26dq%3DBarras%2Bde%2Bcontrol%2B%2Bse%2Bintroducen%26hl%3Des%26sa%3DX%26ved%3D0ahUKEwiz192busbYAhVMVhQKHTn0B7kQ6AEILjAB%23v%3Donepage%26q%3DBarras%2520de%2520control%2520%2520se%2520introducen%26f%3Dfalse&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text"><span class="citation web"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20100827001220/http://www.madrimasd.org/blogs/ciencianuclear/2007/02/21/59724">«www.madrimasd.org»</a>. Archivado desde <a rel="nofollow" class="external text" href="http://www.madrimasd.org/blogs/ciencianuclear/2007/02/21/59724">el original</a> el 27 de agosto de 2010<span class="reference-accessdate">. Consultado el 22 de abril de 2011</span>.</span><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fes.wikipedia.org%3ABarras+de+control&rft.btitle=www.madrimasd.org&rft.genre=book&rft_id=http%3A%2F%2Fwww.madrimasd.org%2Fblogs%2Fciencianuclear%2F2007%2F02%2F21%2F59724&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></span> </li> </ol></div> <style data-mw-deduplicate="TemplateStyles:r161257576">.mw-parser-output .mw-authority-control{margin-top:1.5em}.mw-parser-output .mw-authority-control .navbox table{margin:0}.mw-parser-output .mw-authority-control .navbox hr:last-child{display:none}.mw-parser-output .mw-authority-control .navbox+.mw-mf-linked-projects{display:none}.mw-parser-output .mw-authority-control .mw-mf-linked-projects{display:flex;padding:0.5em;border:1px solid var(--border-color-base,#a2a9b1);background-color:var(--background-color-neutral,#eaecf0);color:var(--color-base,#202122)}.mw-parser-output .mw-authority-control .mw-mf-linked-projects ul li{margin-bottom:0}.mw-parser-output .mw-authority-control .navbox{border:1px solid var(--border-color-base,#a2a9b1);background-color:var(--background-color-neutral-subtle,#f8f9fa)}.mw-parser-output .mw-authority-control .navbox-list{border-color:#f8f9fa}.mw-parser-output .mw-authority-control .navbox th{background-color:#eeeeff}html.skin-theme-clientpref-night .mw-parser-output .mw-authority-control .mw-mf-linked-projects{border:1px solid var(--border-color-base,#72777d);background-color:var(--background-color-neutral,#27292d);color:var(--color-base,#eaecf0)}html.skin-theme-clientpref-night .mw-parser-output .mw-authority-control .navbox{border:1px solid var(--border-color-base,#72777d)!important;background-color:var(--background-color-neutral-subtle,#202122)!important}html.skin-theme-clientpref-night .mw-parser-output .mw-authority-control .navbox-list{border-color:#202122!important}html.skin-theme-clientpref-night .mw-parser-output .mw-authority-control .navbox th{background-color:#27292d!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .mw-authority-control .mw-mf-linked-projects{border:1px solid var(--border-color-base,#72777d)!important;background-color:var(--background-color-neutral,#27292d)!important;color:var(--color-base,#eaecf0)!important}html.skin-theme-clientpref-os .mw-parser-output .mw-authority-control .navbox{border:1px solid var(--border-color-base,#72777d)!important;background-color:var(--background-color-neutral-subtle,#202122)!important}html.skin-theme-clientpref-os .mw-parser-output .mw-authority-control .navbox-list{border-color:#202122!important}html.skin-theme-clientpref-os .mw-parser-output .mw-authority-control .navbox th{background-color:#27292d!important}}</style><div class="mw-authority-control"><div role="navigation" class="navbox" aria-label="Navbox" style="width: inherit;padding:3px"><table class="hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="row" class="navbox-group" style="width: 12%; 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