{"id":31166,"date":"2026-03-24T08:46:00","date_gmt":"2026-03-24T07:46:00","guid":{"rendered":"https:\/\/www.revistanuclear.es\/?p=31166"},"modified":"2026-03-24T08:49:39","modified_gmt":"2026-03-24T07:49:39","slug":"how-to-improve-the-optimization-of-recharging-schedules-with-neutronet-experience-and-multi-objective-function","status":"publish","type":"post","link":"https:\/\/www.revistanuclear.es\/en\/fuel-cycle\/how-to-improve-the-optimization-of-recharging-schedules-with-neutronet-experience-and-multi-objective-function\/","title":{"rendered":"How to improve the optimization of recharging schedules with Neutronet: experience and multi-objective function"},"content":{"rendered":"<div class=\"rn-icon-panel__wrap\" style=\"display:flex;justify-content:flex-start;\"><a class=\"rn-icon-panel descargar\" href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Esquemas-de-recarga-con-Neutronet.pdf\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" style=\"--rn-bg:#8baf31;--rn-color:#ffffff;--rn-border:0px solid;--rn-shadow:0px 0px 0px;--rn-rounded:12px;--rn-padding:14px;--rn-gap:10px;--rn-icon-size:30px;\"><span class=\"rn-icon-panel__icon\" aria-hidden=\"true\"><img src=\"https:\/\/revistanuclear.es\/wp-content\/uploads\/2022\/12\/click.png\" alt=\"\" loading=\"lazy\" decoding=\"async\" \/><\/span><span class=\"rn-icon-panel__text\">SEE FULL VERSION<\/span><\/a><br><\/div><span class=\"su-dropcap su-dropcap-style-simple\" style=\"font-size:2.5em\">T<\/span><span style=\"font-weight: 400;\">he search and optimisation process for PWR loading pattern designs is inherently complex and resourceintensive, requiring substantial time and computational capabilities. Traditionally, this process has relied on an intuitive and iterative approach largely driven by the expertise of a nuclear designer. Multiple loading pattern configurations would be evaluated using a neutronic code until a core design was identified that met the plant\u2019s energy production goals and operational constraints, while ensuring all safety requirements were satisfied. This approach, although effective, involved considerable effort and demanded a high level of specialized experience. In this context, and with the objective of improving efficiency without compromising design standards, ENUSA developed Neutronet.<\/span><\/p>\n<p><a href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\" wp-image-31181 alignnone\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-1024x652.jpg\" alt=\"ENUSA\" width=\"707\" height=\"450\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-1024x652.jpg 1024w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-300x191.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-770x490.jpg 770w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-1536x978.jpg 1536w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-2048x1304.jpg 2048w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-500x318.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-293x187.jpg 293w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-1400x892.jpg 1400w\" sizes=\"auto, (max-width: 707px) 100vw, 707px\" \/><noscript><img fetchpriority=\"high\" decoding=\"async\" class=\" wp-image-31181 alignnone\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-1024x652.jpg\" alt=\"ENUSA\" width=\"707\" height=\"450\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-1024x652.jpg 1024w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-300x191.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-770x490.jpg 770w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-1536x978.jpg 1536w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-2048x1304.jpg 2048w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-500x318.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-293x187.jpg 293w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/ENUSA-3-1400x892.jpg 1400w\" sizes=\"(max-width: 707px) 100vw, 707px\" \/><\/noscript><\/a><\/p>\n<h5 style=\"text-align: justify;\">From a manual process to intelligent automation<\/h5>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><strong>Neutronet is a tool<\/strong> that integrates an artificial neural network (ANN) <strong>with an optimization algorithm to accelerate the search for suitable loading patterns<\/strong>. Since its development some years ago, it has been employed as a <strong>support tool for PWR<\/strong> reload design studies in several Spanish nuclear power plants, achieving highly satisfactory results.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">This work builds upon <strong>ENUSA\u2019s accumulated experience with Neutronet in PWR<\/strong> loading pattern design. Based on this operational insight, enhancements to the tool are proposed to better address the inherent complexity of core design. In particular, to increase Neutronet\u2019s flexibility, the implementation of multiobjective functions is explored, enabling the simultaneous optimisation of multiple key variables in the PWR core design process.<\/span><\/p>\n<p><a href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" loading=\"lazy\" class=\" wp-image-31184 alignnone\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-1024x683.jpg\" alt=\"Barras combustible\" width=\"704\" height=\"469\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-1024x683.jpg 1024w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-300x200.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-770x513.jpg 770w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-1536x1024.jpg 1536w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-2048x1365.jpg 2048w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-360x240.jpg 360w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-500x333.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-1155x770.jpg 1155w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-370x247.jpg 370w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-293x195.jpg 293w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-1400x933.jpg 1400w\" sizes=\"auto, (max-width: 704px) 100vw, 704px\" \/><noscript><img decoding=\"async\" class=\" wp-image-31184 alignnone\" src=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-1024x683.jpg\" alt=\"Barras combustible\" width=\"704\" height=\"469\" srcset=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-1024x683.jpg 1024w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-300x200.jpg 300w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-770x513.jpg 770w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-1536x1024.jpg 1536w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-2048x1365.jpg 2048w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-360x240.jpg 360w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-500x333.jpg 500w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-1155x770.jpg 1155w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-370x247.jpg 370w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-293x195.jpg 293w, https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Barras-combustible-1400x933.jpg 1400w\" sizes=\"(max-width: 704px) 100vw, 704px\" \/><\/noscript><\/a><\/p>\n<h5>Toward more efficient multi-objective optimization<\/h5>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">The scope of this study includes an <strong>analysis of Neutronet\u2019s performance<\/strong>, illustrated through its application in the search for a specific reload project. The report also details the development and implementation of different multiobjective functions designed to optimise two parameters concurrently. Finally, the impact of these new objective functions on both the efficiency and the effectiveness of the loading pattern search process is evaluated. The proposed improvements aim to enhance Neutronet\u2019s precision and adaptability, thereby contributing to a more streamlined and robust coredesign workflow.<\/span><\/p>\n<p class=\"p1\"><div class=\"rn-icon-panel__wrap\" style=\"display:flex;justify-content:flex-start;\"><a class=\"rn-icon-panel\" href=\"https:\/\/www.revistanuclear.es\/wp-content\/uploads\/2026\/03\/Esquemas-de-recarga-con-Neutronet.pdf\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" style=\"--rn-bg:#8baf31;--rn-color:#ffffff;--rn-border:0px solid;--rn-shadow:0px 0px 0px;--rn-rounded:12px;--rn-padding:14px;--rn-gap:10px;--rn-icon-size:0px;\"><span class=\"rn-icon-panel__icon\" aria-hidden=\"true\"><img src=\"https:\/\/revistanuclear.es\/wp-content\/uploads\/2022\/12\/click.png\" alt=\"\" loading=\"lazy\" decoding=\"async\" \/><\/span><span class=\"rn-icon-panel__text\">SEE FULL VERSION<\/span><\/a><br><\/div>\n","protected":false},"excerpt":{"rendered":"<p>he search and optimisation process for PWR loading pattern designs is inherently complex and resourceintensive, requiring substantial time and computational capabilities. Traditionally, this process has relied on an intuitive and iterative approach largely driven by the expertise of a nuclear designer. Multiple loading pattern configurations would be evaluated using a neutronic code until a core design was identified that met the plant\u2019s energy production goals and operational constraints, while ensuring all safety requirements were satisfied. This approach, although effective, involved [&hellip;]<\/p>\n","protected":false},"author":1782,"featured_media":31175,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"mc4wp_mailchimp_campaign":[],"footnotes":""},"categories":[70,67],"tags":[4152,1709,2431,877,2947,3239],"coauthors":[4247,4249],"class_list":["post-31166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fuel-cycle","category-technology-and-innovation","tag-almaraz-nuclear-power-plant","tag-declassification","tag-neural-networks","tag-nuclear-energy","tag-optimization","tag-pwr-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Optimization of refueling schemes in PWRs with Neutronet<\/title>\n<meta name=\"description\" content=\"Optimization of refueling schemes in PWRs with Neutronet and 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