{"id":25478,"date":"2024-02-01T16:41:36","date_gmt":"2024-02-01T15:41:36","guid":{"rendered":"https:\/\/www.revistanuclear.es\/uncategorized\/alargamiento-de-ciclo-en-una-central-nuclear\/"},"modified":"2024-02-29T12:37:49","modified_gmt":"2024-02-29T11:37:49","slug":"alargamiento-de-ciclo-en-una-central-nuclear","status":"publish","type":"post","link":"https:\/\/www.revistanuclear.es\/en\/dissemination\/alargamiento-de-ciclo-en-una-central-nuclear\/","title":{"rendered":"Cycle extension in a nuclerar power plant"},"content":{"rendered":"<div dir=\"auto\">\n<div dir=\"auto\">\n<p><strong>Curiosos y curiosas, bienvenidos a Hilando #NuclearEspa\u00f1a<\/strong><\/p>\n<p><strong>En esta secci\u00f3n del portal web, nuestro equipo de redacci\u00f3n recupera hilos previamente publicados en Twitter, por el inter\u00e9s de su tem\u00e1tica y la calidad de su contenido.<\/strong><\/p>\n<\/div>\n<div dir=\"auto\">\n<p><strong>Hoy adaptamos el hilo de INSTRUCTOR NUCLEAR (<span style=\"color: #008000;\"><a style=\"color: #008000;\" href=\"https:\/\/twitter.com\/fruf82\">@fruf82<\/a><\/span>) en el que se explica c\u00f3mo es posible que un reactor pueda retrasar la parada de recarga, algo conocido como &#8220;stretch out&#8221;\u00a0del reactor:<\/strong><\/p>\n<p><strong><div class=\"su-divider su-divider-style-double\" style=\"margin:15px 0;border-width:3px;border-color:#0b6d31\"><\/div><\/strong><\/div>\n<div dir=\"auto\">\u00a0<\/div>\n<\/div>\n<div class=\"row t-tweet\">\n<div class=\"col-12\">\n<div id=\"tweet_3\" class=\"content-tweet allow-preview\" dir=\"auto\" style=\"text-align: justify;\" data-screenname=\"fruf82\" data-tweet=\"1256283166354165762\">Recordemos: un neutr\u00f3n nace de una fisi\u00f3n inicial, debe moverse por el n\u00facleo sin ser absorbido, sin escapar del n\u00facleo, debe ser frenado (moderado) para tener mayor probabilidad de provocar una nueva fisi\u00f3n y debe \u201cencontrar\u201d un n\u00facleo de uranio 235 y ser capaz de \u201cromperlo\u201d.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283166354165762\"><a href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto1.jpg\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-24726\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto1.jpg\" alt=\"\" width=\"600\" height=\"437\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto1.jpg 600w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto1-300x219.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto1-500x364.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto1-293x213.jpg 293w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><noscript><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-24726\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto1.jpg\" alt=\"\" width=\"600\" height=\"437\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto1.jpg 600w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto1-300x219.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto1-500x364.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto1-293x213.jpg 293w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/noscript><\/a><\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" style=\"text-align: justify;\" data-screenname=\"fruf82\" data-tweet=\"1256283166354165762\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" style=\"text-align: justify;\" data-screenname=\"fruf82\" data-tweet=\"1256283166354165762\">En un reactor nuclear tratamos de mantener la reacci\u00f3n en cadena durante 12 (Trillo), 18 (Asc\u00f3, Vandell\u00f3s, Almaraz) o 24 meses (Cofrentes). Y esa reacci\u00f3n en cadena debe ser estable, de modo que la potencia generada (proporcional al n\u00famero de fisiones por segundo) sea estable.<\/div>\n<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283174239428612\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283174239428612\"><span style=\"text-align: justify;\">La forma de variar la potencia generada se basa en modificar ciertas condiciones que afectan a la vida de los neutrones generados en cada fisi\u00f3n.<\/span><\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283174239428612\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283174239428612\"><span style=\"text-align: justify;\">Pensemos en los n\u00facleos de Uranio 235 como dianas y los neutrones como flechas. La cantidad de dianas acertadas por segundo es proporcional a la potencia generada. Podemos subir potencia aumentando el n\u00famero de flechas o el n\u00famero de dianas (o haciendo las dianas m\u00e1s grandes).<br \/>\n<\/span><span class=\"entity-image\"><a href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto2.jpg\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-24728\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto2.jpg\" alt=\"\" width=\"600\" height=\"380\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto2.jpg 600w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto2-300x190.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto2-500x317.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto2-293x186.jpg 293w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><noscript><img decoding=\"async\" class=\"aligncenter size-full wp-image-24728\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto2.jpg\" alt=\"\" width=\"600\" height=\"380\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto2.jpg 600w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto2-300x190.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto2-500x317.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto2-293x186.jpg 293w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/noscript><\/a><\/span><\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283174239428612\"><span style=\"text-align: justify;\"><br \/>\nAl inicio del ciclo de operaci\u00f3n, se carga el n\u00facleo con un exceso de dianas (uranio). Si no limitamos el n\u00famero de flechas (neutrones), la potencia aumentar\u00eda de forma exponencial.<\/span><\/div>\n<\/div>\n<div class=\"row t-tweet\" style=\"text-align: justify;\">\n<div class=\"col-12\">\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283186168049664\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283186168049664\">Para compensar el exceso de uranio, se utiliza alg\u00fan fen\u00f3meno f\u00edsico que provoca la absorci\u00f3n de los neutrones sobrantes.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283186168049664\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283186168049664\">En los reactores de agua a presi\u00f3n (PWR, Asc\u00f3, Trillo, Almaraz y Vandell\u00f3s) se utiliza boro 10 para absorber los neutrones sobrantes.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283186168049664\">\u00a0<\/div>\n<\/div>\n<\/div>\n<div class=\"row t-tweet\" style=\"text-align: justify;\">\n<div class=\"col-12\">\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283189649252355\"><span class=\"row justify-content-center entity-multiple-2\"><span class=\"col-md-6\"><span class=\"entity-image\"><a href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3.jpg\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-large wp-image-24730\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-1024x372.jpg\" alt=\"\" width=\"1024\" height=\"372\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-1024x372.jpg 1024w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-300x109.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-770x280.jpg 770w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-500x182.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-293x106.jpg 293w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3.jpg 1274w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><noscript><img decoding=\"async\" class=\"aligncenter size-large wp-image-24730\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-1024x372.jpg\" alt=\"\" width=\"1024\" height=\"372\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-1024x372.jpg 1024w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-300x109.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-770x280.jpg 770w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-500x182.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3-293x106.jpg 293w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto3.jpg 1274w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/noscript><\/a><\/span><\/span><\/span><\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283189649252355\">\n<p>En los reactores de agua en ebullici\u00f3n (BWR, Cofrentes) se utiliza la \u201cpresencia de huecos\u201d (vapor) que dificulta la moderaci\u00f3n de los neutrones. (simplificando mucho).<\/p><\/div>\n<\/div>\n<\/div>\n<div class=\"row t-tweet\" style=\"text-align: justify;\">\n<div class=\"col-12\">\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283193239535617\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283193239535617\">Seg\u00fan vamos fisionando n\u00facleos de uranio, menos dianas, debemos aumentar el n\u00famero de neutrones (flechas) para mantener la cantidad de fisiones por segundo. En los reactores PWR se reduce paulatinamente la concentraci\u00f3n de boro durante el ciclo hasta agotar el combustible.<\/div>\n<\/div>\n<\/div>\n<div class=\"row t-tweet\" style=\"text-align: justify;\">\n<div class=\"col-12\">\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283196595097602\"><span class=\"entity-image\"><a href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto5.jpg\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-24734\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto5.jpg\" alt=\"\" width=\"700\" height=\"426\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto5.jpg 700w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto5-300x183.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto5-500x304.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto5-293x178.jpg 293w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-24734\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto5.jpg\" alt=\"\" width=\"700\" height=\"426\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto5.jpg 700w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto5-300x183.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto5-500x304.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto5-293x178.jpg 293w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/noscript><\/a><\/p>\n<p><\/span>Cuando no hay suficientes dianas y no podemos reducir m\u00e1s la concentraci\u00f3n de boro, el reactor empezar\u00e1 a pararse, reduciendo la cantidad de fisiones por segundo, por falta de uranio y neutrones.<\/div>\n<\/div>\n<\/div>\n<div class=\"row t-tweet\" style=\"text-align: justify;\">\n<div class=\"col-12\">\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283201267474435\">\nHay m\u00e1s cosas que afectan a la probabilidad de que un neutr\u00f3n provoque una fisi\u00f3n.<i> <\/i><\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283201267474435\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283201267474435\">Seguro que hab\u00e9is o\u00eddo en alguna ocasi\u00f3n que los reactores nucleares son intr\u00ednsecamente seguros, porque un aumento de potencia provoca un aumento de temperatura y \u00e9sta, a su vez, provoca una disminuci\u00f3n de potencia. Esto hace al reactor \u201cautoestable\u201d.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283201267474435\"><a href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto4.jpg\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-24732\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto4.jpg\" alt=\"\" width=\"700\" height=\"416\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto4.jpg 700w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto4-300x178.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto4-500x297.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto4-293x174.jpg 293w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-24732\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto4.jpg\" alt=\"\" width=\"700\" height=\"416\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto4.jpg 700w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto4-300x178.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto4-500x297.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto4-293x174.jpg 293w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/noscript><\/a><\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283201267474435\">\nEse comportamiento se explica mediante el coeficiente de temperatura del moderador y combustible (coeficiente Doppler).<\/div>\n<\/div>\n<\/div>\n<div class=\"row t-tweet\" style=\"text-align: justify;\">\n<div class=\"col-12\">\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283209710657536\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283209710657536\">Supongamos un neutr\u00f3n viajando por en n\u00facleo en busca de un n\u00facleo de uranio. En su camino, debe colisionar con n\u00facleos de hidr\u00f3geno para ir perdiendo energ\u00eda escapando de los n\u00facleos de boro que quieren absorberlo.<\/div>\n<\/div>\n<\/div>\n<div class=\"row t-tweet\" style=\"text-align: justify;\">\n<div class=\"col-12\">\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283213259038721\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-24736\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6.jpg\" alt=\"\" width=\"700\" height=\"702\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6.jpg 700w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6-300x300.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6-100x100.jpg 100w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6-500x501.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6-293x294.jpg 293w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6-390x390.jpg 390w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-24736\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6.jpg\" alt=\"\" width=\"700\" height=\"702\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6.jpg 700w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6-300x300.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6-100x100.jpg 100w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6-500x501.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6-293x294.jpg 293w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto6-390x390.jpg 390w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/noscript><br \/>\nLa probabilidad de ser absorbido por boro aumenta con el recorrido (o tiempo) del neutr\u00f3n hasta provocar la siguiente fisi\u00f3n. Si el refrigerante (H2O) est\u00e1 a menor temperatura, por su mayor densidad, los n\u00facleos de H est\u00e1n m\u00e1s juntos y el recorrido del neutr\u00f3n ser\u00e1 menor.<\/div>\n<\/div>\n<\/div>\n<div class=\"row t-tweet\" style=\"text-align: justify;\">\n<div class=\"col-12\">\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">Si la potencia del n\u00facleo aumenta, el refrigerante se calienta, disminuye su densidad y el neutr\u00f3n deber\u00e1 recorrer m\u00e1s longitud hasta poder fisionar, aumentando la probabilidad de ser absorbido, reduciendo por tanto la cantidad de fisiones por segundo y la potencia del reactor.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">Tambi\u00e9n la temperatura del combustible afecta a la absorci\u00f3n de neutrones. Sin entrar en detalles, lo importante del efecto es que a mayor temperatura del combustible, m\u00e1s absorciones de neutrones. Bajando potencia se consigue el efecto contrario.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">Combinando esos dos efectos (enfriamiento del combustible y del refrigerante) se puede mantener la reacci\u00f3n en cadena durante m\u00e1s tiempo cuando ya no queda boro que extraer del n\u00facleo. Esto se consigue reduciendo potencia. A esta maniobra se la denomina <em>\u201cCore Strecth Out\u201d<\/em>.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">Esta estrategia tiene una ventaja: se obtiene m\u00e1s energ\u00eda del n\u00facleo. Pero recordemos que en un reactor no se cambia todo el combustible. De los 157 Elementos de combustible, se sustituyen unos 60 EC. Bien, a esos 60 EC les he extra\u00eddo m\u00e1s energ\u00eda.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">Los elementos restantes se vuelven a introducir en el n\u00facleo, m\u00e1s gastados, lo que limitar\u00e1 la energ\u00eda total que puedo obtener en el siguiente ciclo.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">El vapor generado tambi\u00e9n es de menor calidad y puede ser perjudicial para la turbina.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">Teniendo en cuenta el precio de la energ\u00eda en el mercado, el coste del combustible, los gastos de mantenimiento y personal, impuestos y otras consideraciones que no tienen por qu\u00e9 ser econ\u00f3micas, se puede determinar cu\u00e1l es la estrategia de parada m\u00e1s conveniente.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283218036342784\">En esta ocasi\u00f3n, el Stretch Out de Asc\u00f3 1 para su recarga ha durado un mes y han reducido potencia hasta 810 MW antes de parar el reactor. Esto ha permitido replanificar las actividades de recarga atendiendo a los requisitos sanitarios por COVID-19.<\/div>\n<\/div>\n<\/div>\n<div class=\"row t-tweet\" style=\"text-align: justify;\">\n<div class=\"col-12\">\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283244351365120\"><span class=\"entity-image\"><a href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto7.jpg\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-24738\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto7.jpg\" alt=\"\" width=\"700\" height=\"427\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto7.jpg 700w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto7-300x183.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto7-500x305.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto7-293x179.jpg 293w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-24738\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto7.jpg\" alt=\"\" width=\"700\" height=\"427\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto7.jpg 700w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto7-300x183.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto7-500x305.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto7-293x179.jpg 293w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/noscript><\/a><\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"row t-tweet\" style=\"text-align: justify;\">\n<div class=\"col-12\">\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283248143077382\">\u00a0<\/div>\n<div id=\"tweet_23\" class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283248143077382\">\nEn la anterior recarga el <em>Strecth Out<\/em> dur\u00f3 12 d\u00edas y bajaron solo 90 MW.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283248143077382\"><a href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto8.jpg\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-24740\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto8.jpg\" alt=\"\" width=\"700\" height=\"399\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto8.jpg 700w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto8-300x171.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto8-500x285.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto8-293x167.jpg 293w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-24740\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto8.jpg\" alt=\"\" width=\"700\" height=\"399\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto8.jpg 700w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto8-300x171.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto8-500x285.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto8-293x167.jpg 293w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/noscript><\/a><\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283248143077382\">\u00a0<\/div>\n<div class=\"content-tweet allow-preview\" dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283248143077382\">Otros ejemplos recientes:<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"row t-tweet\" style=\"text-align: justify;\">\n<div class=\"col-12\">\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283251569721348\"><a href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9.jpg\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-24742\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9.jpg\" alt=\"\" width=\"1000\" height=\"305\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9.jpg 1000w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9-300x92.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9-770x235.jpg 770w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9-500x153.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9-293x89.jpg 293w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-24742\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9.jpg\" alt=\"\" width=\"1000\" height=\"305\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9.jpg 1000w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9-300x92.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9-770x235.jpg 770w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9-500x153.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto9-293x89.jpg 293w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/noscript><\/a><br \/>\nLas reducciones de potencia tambi\u00e9n se realizan en situaciones de baja demanda (fines de semana, COVID-19) y alta producci\u00f3n (viento y agua embalsada).<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283251569721348\">\u00a0<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283251569721348\">Por ejemplo, estas son las reducciones de potencia de Cofrentes durante 2020.<\/div>\n<div dir=\"auto\" data-screenname=\"fruf82\" data-tweet=\"1256283251569721348\"><a href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto10.jpg\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-24744\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto10.jpg\" alt=\"\" width=\"600\" height=\"362\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto10.jpg 600w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto10-300x181.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto10-500x302.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto10-293x177.jpg 293w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-24744\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto10.jpg\" alt=\"\" width=\"600\" height=\"362\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto10.jpg 600w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto10-300x181.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto10-500x302.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/foto10-293x177.jpg 293w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/noscript><\/a><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Curiosos y curiosas, bienvenidos a Hilando #NuclearEspa\u00f1a En esta secci\u00f3n del portal web, nuestro equipo de redacci\u00f3n recupera hilos previamente publicados en Twitter, por el inter\u00e9s de su tem\u00e1tica y la calidad de su contenido. Hoy adaptamos el hilo de INSTRUCTOR NUCLEAR (@fruf82) en el que se explica c\u00f3mo es posible que un reactor pueda retrasar la parada de recarga, algo conocido como &#8220;stretch out&#8221;\u00a0del reactor: \u00a0 Recordemos: un neutr\u00f3n nace de una fisi\u00f3n inicial, debe moverse por el n\u00facleo [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":24821,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"mc4wp_mailchimp_campaign":[],"footnotes":""},"categories":[78],"tags":[],"coauthors":[183],"class_list":["post-25478","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dissemination"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cycle extension in a nuclerar power plant - Dissemination<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.revistanuclear.es\/en\/dissemination\/alargamiento-de-ciclo-en-una-central-nuclear\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cycle extension in a nuclerar power plant - Dissemination\" \/>\n<meta property=\"og:description\" content=\"Curiosos y curiosas, bienvenidos a Hilando #NuclearEspa\u00f1a En esta secci\u00f3n del portal web, nuestro equipo de redacci\u00f3n recupera hilos previamente publicados en Twitter, por el inter\u00e9s de su tem\u00e1tica y la calidad de su contenido. Hoy adaptamos el hilo de INSTRUCTOR NUCLEAR (@fruf82) en el que se explica c\u00f3mo es posible que un reactor pueda retrasar la parada de recarga, algo conocido como &#8220;stretch out&#8221;\u00a0del reactor: \u00a0 Recordemos: un neutr\u00f3n nace de una fisi\u00f3n inicial, debe moverse por el n\u00facleo [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.revistanuclear.es\/en\/dissemination\/alargamiento-de-ciclo-en-una-central-nuclear\/\" \/>\n<meta property=\"og:site_name\" content=\"Revista Nuclear Espa\u00f1a\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SNE.spain\" \/>\n<meta property=\"article:published_time\" content=\"2024-02-01T15:41:36+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-02-29T11:37:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2023\/12\/Apertura-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"SNE\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SNEu235\" \/>\n<meta name=\"twitter:site\" content=\"@SNEu235\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"SNE\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.revistanuclear.es\\\/en\\\/dissemination\\\/alargamiento-de-ciclo-en-una-central-nuclear\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.revistanuclear.es\\\/en\\\/dissemination\\\/alargamiento-de-ciclo-en-una-central-nuclear\\\/\"},\"author\":{\"name\":\"SNE\",\"@id\":\"https:\\\/\\\/www.revistanuclear.es\\\/en\\\/#\\\/schema\\\/person\\\/e3730eac0e437112480f1a88d78d7b82\"},\"headline\":\"Cycle extension in a nuclerar power plant\",\"datePublished\":\"2024-02-01T15:41:36+00:00\",\"dateModified\":\"2024-02-29T11:37:49+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.revistanuclear.es\\\/en\\\/dissemination\\\/alargamiento-de-ciclo-en-una-central-nuclear\\\/\"},\"wordCount\":990,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.revistanuclear.es\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.revistanuclear.es\\\/en\\\/dissemination\\\/alargamiento-de-ciclo-en-una-central-nuclear\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.revistanuclear.es\\\/wp-content\\\/uploads\\\/2023\\\/12\\\/Apertura-1.png\",\"articleSection\":[\"Dissemination\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.revistanuclear.es\\\/en\\\/dissemination\\\/alargamiento-de-ciclo-en-una-central-nuclear\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.revistanuclear.es\\\/en\\\/dissemination\\\/alargamiento-de-ciclo-en-una-central-nuclear\\\/\",\"url\":\"https:\\\/\\\/www.revistanuclear.es\\\/en\\\/dissemination\\\/alargamiento-de-ciclo-en-una-central-nuclear\\\/\",\"name\":\"Cycle extension in a nuclerar power plant - 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