{"id":45919,"date":"2019-10-20T11:13:06","date_gmt":"2019-10-20T10:13:06","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/quest-ce-quun-metre-cube-definition\/"},"modified":"2020-02-26T13:18:30","modified_gmt":"2020-02-26T12:18:30","slug":"quest-ce-quun-metre-cube-definition","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-quun-metre-cube-definition\/","title":{"rendered":"Qu&#8217;est-ce qu&#8217;un m\u00e8tre cube &#8211; D\u00e9finition"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Le m\u00e8tre cube est l&#8217;unit\u00e9 de volume d\u00e9riv\u00e9e du SI.\u00a0Si une case a un c\u00f4t\u00e9 de 3 m\u00e8tres, le volume sera de 3 m\u00e8tres x 3 m\u00e8tres x 3 m\u00e8tres, soit 27 m\u00e8tres cubes.\u00a0G\u00e9nie thermique<\/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>Quel est le volume<\/h2>\n<p><strong><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/what-is-volume-min.png\"><img loading=\"lazy\" class=\"alignright size-medium wp-image-16483 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/what-is-volume-min-300x300.png\" alt=\"quel est le volume - la physique\" width=\"300\" height=\"300\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/what-is-volume-min-300x300.png\" \/><\/a>Le volume<\/strong>\u00a0est une\u00a0<strong>quantit\u00e9 physique de<\/strong>\u00a0base\u00a0.\u00a0<strong>Le volume<\/strong>\u00a0est une quantit\u00e9 d\u00e9riv\u00e9e qui exprime l&#8217;\u00a0<strong>\u00e9tendue tridimensionnelle<\/strong>\u00a0d&#8217;un\u00a0<strong>objet<\/strong>\u00a0.\u00a0Le volume est souvent quantifi\u00e9 num\u00e9riquement \u00e0 l&#8217;aide de l&#8217;unit\u00e9 d\u00e9riv\u00e9e du SI, le\u00a0<strong>m\u00e8tre cube<\/strong>\u00a0.\u00a0Par exemple, le volume \u00e0 l&#8217;int\u00e9rieur d&#8217;une\u00a0<strong>sph\u00e8re<\/strong>\u00a0(c&#8217;est-\u00e0-dire le volume d&#8217;une balle) est\u00a0<strong>calcul\u00e9<\/strong>\u00a0comme \u00e9tant\u00a0<strong>V = 4 \/ 3\u03c0r\u00a0<\/strong><strong><sup>3<\/sup><\/strong>\u00a0, o\u00f9 r est le rayon de la sph\u00e8re.\u00a0Autre exemple, le volume d&#8217;un cube est \u00e9gal \u00e0 c\u00f4t\u00e9 fois c\u00f4t\u00e9 fois.\u00a0Comme chaque c\u00f4t\u00e9 d&#8217;un carr\u00e9 est identique, il peut simplement s&#8217;agir de la longueur d&#8217;un c\u00f4t\u00e9\u00a0<strong>coup\u00e9 en cubes<\/strong>\u00a0.<\/p>\n<p>Si une case a un c\u00f4t\u00e9 de 3 m\u00e8tres, le volume sera de 3 m\u00e8tres x 3 m\u00e8tres x 3 m\u00e8tres, soit 27 m\u00e8tres cubes.<\/p>\n<\/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\">\n<div class=\"su-accordion\">\n<div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus su-spoiler-closed\">\n<div class=\"su-spoiler-content su-clearfix\">\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<\/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\">\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<h2><span>Volume d&#8217;un atome et d&#8217;un noyau<\/span><\/h2>\n<figure id=\"attachment_11250\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-11250\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Structure-of-Matter.jpg\"><img loading=\"lazy\" class=\"size-medium wp-image-11250 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Structure-of-Matter-300x132.jpg\" alt=\"Structure de la mati\u00e8re.\" width=\"300\" height=\"132\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Structure-of-Matter-300x132.jpg\" \/><\/a><figcaption id=\"caption-attachment-11250\" class=\"wp-caption-text\"><span>Structure de la mati\u00e8re.<\/span><\/figcaption><\/figure>\n<p><strong><span>L&#8217;atome est<\/span><\/strong><span>\u00a0constitu\u00e9 d&#8217;un\u00a0<\/span><strong><span>noyau<\/span><\/strong><span>\u00a0petit mais massif\u00a0entour\u00e9 d&#8217;un nuage d&#8217;\u00a0<\/span><strong><span>\u00e9lectrons se<\/span><\/strong><span>\u00a0d\u00e9pla\u00e7ant rapidement\u00a0.\u00a0Le noyau est compos\u00e9 de\u00a0<\/span><strong><span>protons et de\u00a0<\/span><\/strong><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/\"><strong><span>neutrons<\/span><\/strong><\/a><span>\u00a0.\u00a0Les rayons nucl\u00e9aires typiques sont de l&#8217;ordre de 10 \u00e0\u00a0<\/span><sup><span>14<\/span><\/sup><span>\u00a0m.\u00a0En supposant une forme sph\u00e9rique, les rayons nucl\u00e9aires peuvent \u00eatre calcul\u00e9s selon la formule suivante:<\/span><\/p>\n<p><span>r = r\u00a0<\/span><sub><span>0<\/span><\/sub><span>\u00a0.\u00a0A\u00a0<\/span><sup><span>1\/3<\/span><\/sup><\/p>\n<p><span>o\u00f9 r\u00a0<\/span><sub><span>0<\/span><\/sub><span>\u00a0= 1,2 x\u00a0<\/span><sup><span>10-15<\/span><\/sup><span>\u00a0m = 1,2 fm<\/span><\/p>\n<p><span>Si nous utilisons cette approximation, nous nous attendons donc \u00e0 ce que le volume du noyau soit de l&#8217;ordre de 4 \/ 3\u03c0r\u00a0<\/span><sup><span>3<\/span><\/sup><span>\u00a0ou 7,23 \u00d7 10\u00a0<\/span><sup><span>-45<\/span><\/sup><span>\u00a0m\u00a0<\/span><sup><span>3<\/span><\/sup><span>\u00a0pour les noyaux d&#8217;hydrog\u00e8ne ou 1721 \u00d7 10\u00a0<\/span><sup><span>-45<\/span><\/sup><span>\u00a0m\u00a0<\/span><sup><span>3<\/span><\/sup><span>\u00a0pour les\u00a0noyaux\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-fuel\/uranium\/uranium-238\/\"><sup><span>238<\/span><\/sup><span>\u00a0U.\u00a0<\/span><\/a><span>Ce sont des volumes de noyaux et de noyaux atomiques (protons et neutrons) contenant environ\u00a0<\/span><strong><span>99,95%<\/span><\/strong><span>\u00a0de la masse de l&#8217;atome.<\/span><\/p>\n<\/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\">\n<div class=\"su-spacer\"><\/div>\n<h2><span>Volume de liquide de refroidissement dans le syst\u00e8me de refroidissement du r\u00e9acteur<\/span><\/h2>\n<figure id=\"attachment_102\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-102\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/WWER_nuclear_reactor.jpg\"><img loading=\"lazy\" class=\"size-medium wp-image-102 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/WWER_nuclear_reactor-300x288.jpg\" alt=\"R\u00e9acteur nucl\u00e9aire - WWER 1200\" width=\"300\" height=\"288\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/WWER_nuclear_reactor-300x288.jpg\" \/><\/a><figcaption id=\"caption-attachment-102\" class=\"wp-caption-text\"><span>R\u00e9acteur nucl\u00e9aire et syst\u00e8me de refroidissement primaire du WWER-1200.<\/span><br \/>\n<span>Source: gidropress.podolsk.ru<\/span><br \/>\n<span>utilis\u00e9 avec la permission de \u0410\u041e \u041e\u041a\u0411 \u201c\u0413\u0418\u0414\u0420\u041e\u041f\u0420\u0415\u0421\u0421\u201d<\/span><\/figcaption><\/figure>\n<p><span>Dans les\u00a0<\/span><a title=\"PWR - R\u00e9acteur \u00e0 eau sous pression\" href=\"https:\/\/www.nuclear-power.com\/pwr-pressurized-water-reactor\/\"><strong><span>r\u00e9acteurs \u00e0 eau sous pression<\/span><\/strong><\/a><span>\u00a0(REP)\u00a0modernes et typiques\u00a0, le\u00a0<\/span><strong><span>syst\u00e8me de refroidissement<\/span><\/strong><span>\u00a0du\u00a0<strong>r\u00e9acteur<\/strong>\u00a0(RCS), illustr\u00e9 sur la figure, se compose de:<\/span><\/p>\n<ul>\n<li><span>la\u00a0<\/span><a title=\"R\u00e9cipient sous pression du r\u00e9acteur\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-reactor\/reactor-pressure-vessel\/\"><strong><span>cuve<\/span><\/strong><\/a><span>\u00a0du\u00a0<a title=\"R\u00e9cipient sous pression du r\u00e9acteur\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-reactor\/reactor-pressure-vessel\/\"><strong>r\u00e9acteur<\/strong><\/a>\u00a0, qui contient le\u00a0<\/span><a title=\"Combustible nucl\u00e9aire\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-fuel\/\"><span>combustible nucl\u00e9aire<\/span><\/a><\/li>\n<li><span>quatre\u00a0<\/span><strong><span>boucles de<\/span><\/strong><span>\u00a0transfert de chaleur parall\u00e8les\u00a0reli\u00e9es \u00e0 une cuve de r\u00e9acteur.<\/span><\/li>\n<li><span>chaque boucle contient une\u00a0<\/span><a title=\"Pompe de refroidissement du r\u00e9acteur\" href=\"https:\/\/www.nuclear-power.com\/reactor-coolant-pump\/\"><strong><span>pompe de refroidissement principale<\/span><\/strong><\/a><span>\u00a0et un\u00a0<\/span><a title=\"G\u00e9n\u00e9rateur de vapeur\" href=\"https:\/\/www.nuclear-power.com\/steam-generator\/\"><strong><span>g\u00e9n\u00e9rateur de vapeur<\/span><\/strong><\/a><span>\u00a0.<\/span><\/li>\n<li><span>le syst\u00e8me comprend un\u00a0<\/span><a title=\"Pressuriseur\" href=\"https:\/\/www.nuclear-power.com\/pressurizer\/\"><strong><span>pressuriseur<\/span><\/strong>\u00a0<\/a><span>et ses syst\u00e8mes auxiliaires<\/span><\/li>\n<\/ul>\n<p><span>Tous les composants RCS sont situ\u00e9s \u00e0 l&#8217;int\u00e9rieur du\u00a0<\/span><a title=\"B\u00e2timent de confinement\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/containment-building\/\"><span>b\u00e2timent de confinement<\/span><\/a><span>\u00a0.<\/span><\/p>\n<p><span>En fonctionnement normal, il y a\u00a0<\/span><a title=\"Liquide satur\u00e9 et sous-refroidi\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-steam-what-is-steam\/saturated-and-subcooled-liquid\/\"><span>de l&#8217;eau liquide comprim\u00e9e \u00e0 l&#8217;<\/span><\/a><span>\u00a0int\u00e9rieur de la cuve du r\u00e9acteur, des boucles et des g\u00e9n\u00e9rateurs de vapeur.\u00a0La pression est maintenue \u00e0 environ\u00a0<\/span><strong><span>16 MPa<\/span><\/strong><span>\u00a0.\u00a0\u00c0 cette pression, l&#8217;eau bout \u00e0 environ\u00a0<\/span><strong><span>350 \u00b0 C<\/span><\/strong><span>\u00a0(662 \u00b0 F).\u00a0La temp\u00e9rature d&#8217;entr\u00e9e de l&#8217;eau est d&#8217;environ\u00a0<\/span><strong><span>290 \u00b0 C<\/span><\/strong><span>\u00a0(554 \u00b0 F).\u00a0L&#8217;eau (liquide de refroidissement) est chauff\u00e9e dans le c\u0153ur du r\u00e9acteur \u00e0 environ\u00a0<\/span><strong><span>325 \u00b0 C<\/span><\/strong><span>\u00a0(617 \u00b0 F) lorsque l&#8217;eau s&#8217;\u00e9coule \u00e0 travers le c\u0153ur.\u00a0Comme on peut le voir, le r\u00e9acteur contient environ 25 \u00b0 C de liquide de refroidissement sous-refroidi (distance de la saturation).<\/span><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Volume-of-reactor-coolant-system.png\"><img loading=\"lazy\" class=\"alignright size-full wp-image-16481 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Volume-of-reactor-coolant-system.png\" alt=\"syst\u00e8me de refroidissement du volume du r\u00e9acteur\" width=\"262\" height=\"478\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Volume-of-reactor-coolant-system.png\" \/><\/a><span>Cette haute pression est maintenue par le\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/pressurizer\/\"><span>pressuriseur<\/span><\/a><span>\u00a0, un r\u00e9cipient s\u00e9par\u00e9 qui est connect\u00e9 au circuit primaire (jambe chaude) et partiellement rempli d&#8217;\u00a0<\/span><a title=\"Propri\u00e9t\u00e9s de l'eau\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-of-water\/\"><span>eau<\/span><\/a><span>\u00a0(partiellement avec\u00a0<\/span><a title=\"Propri\u00e9t\u00e9s de Steam - Qu'est-ce que Steam\" href=\"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-steam-proprietes-de-steam-definition\/\"><span>de la vapeur satur\u00e9e<\/span><\/a><span>\u00a0) qui est chauff\u00e9e \u00e0 la\u00a0<\/span><a title=\"Saturation - point d'\u00e9bullition\" href=\"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-la-saturation-point-debullition-definition\/\"><strong><span>temp\u00e9rature de saturation<\/span><\/strong>\u00a0<\/a><span>(point d&#8217;\u00e9bullition) pour la pression souhait\u00e9e par\u00a0<\/span><strong><span>radiateurs \u00e9lectriques<\/span><\/strong><span>\u00a0immerg\u00e9s\u00a0.\u00a0La temp\u00e9rature dans le pressuriseur peut \u00eatre maintenue \u00e0 350 \u00b0 C.\u00a0Dans des conditions normales, environ\u00a0<\/span><strong><span>60%<\/span><\/strong><span>\u00a0du volume du pressuriseur occupe l&#8217;\u00a0<\/span><strong><span>eau comprim\u00e9e<\/span><\/strong><span>\u00a0et environ\u00a0<\/span><strong><span>40%<\/span><\/strong><span>\u00a0du volume occupe la\u00a0<\/span><strong><span>vapeur satur\u00e9e<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<p><span>Les volumes de PWR typiques sont dans le tableau suivant.<\/span><\/p>\n<p><strong><span>Il s&#8217;agit d&#8217;un exemple illustratif, les donn\u00e9es suivantes\u00a0<\/span><span>ne<\/span><span>\u00a0correspondent \u00e0 aucune conception de r\u00e9acteur.<\/span><\/strong><\/p>\n<p><span>Il faut noter que le\u00a0<\/span><strong><span>volume de liquide de refroidissement\u00a0<\/span><\/strong><strong><span>change de<\/span><\/strong><span>\u00a0mani\u00e8re significative\u00a0avec la\u00a0<\/span><strong><span>temp\u00e9rature<\/span><\/strong><span>\u00a0du liquide de refroidissement.\u00a0La\u00a0<\/span><strong><span>masse totale<\/span><\/strong><span>\u00a0du liquide de refroidissement reste toujours la m\u00eame, un changement de volume d&#8217;eau n&#8217;est pas un changement de stock d&#8217;eau.\u00a0Le volume de liquide de refroidissement du r\u00e9acteur change avec la temp\u00e9rature en raison des\u00a0<\/span><a title=\"Changements de densit\u00e9\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/thermodynamic-properties\/what-is-density-physics\/changes-of-density\/\"><strong><span>changements de densit\u00e9<\/span><\/strong><\/a><span>\u00a0.\u00a0La plupart des substances se\u00a0<\/span><strong><span>dilatent\u00a0<\/span><\/strong><span><strong>lorsqu&#8217;elles sont\u00a0<\/strong><\/span><strong><span>chauff\u00e9es<\/span><\/strong><span>\u00a0et se\u00a0<\/span><strong><span>contractent lorsqu&#8217;elles sont refroidies<\/span><\/strong><span>\u00a0.\u00a0Cependant, la quantit\u00e9 d&#8217;expansion ou de contraction varie selon le mat\u00e9riau.\u00a0Ce ph\u00e9nom\u00e8ne est connu sous le nom\u00a0<\/span><strong><span>de dilatation thermique<\/span><\/strong><span>\u00a0.\u00a0Le changement de volume d&#8217;un mat\u00e9riau qui subit un changement de temp\u00e9rature est donn\u00e9 par la relation suivante:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/thermal-expansion.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-16267 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/thermal-expansion.png\" alt=\"dilatation thermique\" width=\"130\" height=\"62\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/thermal-expansion.png\" \/><\/a><\/p>\n<p><span>o\u00f9 \u2206T est le changement de temp\u00e9rature, V est le volume d&#8217;origine, \u2206V est le changement de volume et\u00a0<\/span><strong><span>\u03b1\u00a0<\/span><\/strong><strong><sub><span>V<\/span><\/sub><\/strong><span>\u00a0est le\u00a0<\/span><strong><span>coefficient de dilatation du volume<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<figure id=\"attachment_14174\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-14174\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/water-density-temperature.png\"><img loading=\"lazy\" class=\"size-medium wp-image-14174 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/water-density-temperature-300x211.png\" alt=\"Graphique - densit\u00e9 - eau - temp\u00e9rature\" width=\"300\" height=\"211\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/water-density-temperature-300x211.png\" \/><\/a><figcaption id=\"caption-attachment-14174\" class=\"wp-caption-text\"><span>Densit\u00e9 de l&#8217;eau liquide (comprim\u00e9e) en fonction de la temp\u00e9rature de l&#8217;eau<\/span><\/figcaption><\/figure>\n<p><span>Le\u00a0<\/span><strong><span>coefficient de dilatation thermique volum\u00e9trique<\/span><\/strong><span>\u00a0pour l&#8217;eau n&#8217;est\u00a0<\/span><strong><span>pas constant<\/span><\/strong><span>\u00a0sur la plage de temp\u00e9rature et augmente avec la temp\u00e9rature (en\u00a0<\/span><strong><span>particulier \u00e0 300 \u00b0 C<\/span><\/strong><span>\u00a0), donc le changement de densit\u00e9 n&#8217;est\u00a0<\/span><strong><span>pas lin\u00e9aire<\/span><\/strong><span>\u00a0avec la temp\u00e9rature (comme indiqu\u00e9 sur la figure).<\/span><\/p>\n<p><span>Voir aussi:\u00a0<\/span><a title=\"Tables \u00e0 vapeur - Propri\u00e9t\u00e9s sp\u00e9cifiques de l'eau et de la vapeur\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/steam-tables\/\"><span>Tables Steam<\/span><\/a><\/p>\n<p><strong><span>Dans des conditions normales,<\/span><\/strong><span>\u00a0le volume total de liquide de refroidissement dans le syst\u00e8me de refroidissement du r\u00e9acteur est presque constant.\u00a0D&#8217;un autre c\u00f4t\u00e9,\u00a0<\/span><strong><span>dans des conditions de charge transitoire,<\/span><\/strong><span>\u00a0le\u00a0<\/span><strong><span>volume peut changer consid\u00e9rablement<\/span><\/strong><span>\u00a0.\u00a0Ces changements se refl\u00e8tent naturellement dans un changement du niveau d&#8217;eau du pressuriseur.\u00a0Lorsque la temp\u00e9rature moyenne du liquide de refroidissement du r\u00e9acteur baisse progressivement, le volume total d&#8217;eau diminue \u00e9galement, ce qui abaisse le niveau du pressuriseur.\u00a0Lors d&#8217;une reprise progressive de la charge, l&#8217;augmentation de la temp\u00e9rature moyenne du liquide de refroidissement du r\u00e9acteur provoque une augmentation du volume total d&#8217;eau, ce qui augmente le niveau du pressuriseur.\u00a0Ces effets doivent \u00eatre contr\u00f4l\u00e9s par le syst\u00e8me de contr\u00f4le du niveau du pressuriseur.<\/span><\/p>\n<\/div>\n<\/div>\n<\/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>Cet article est bas\u00e9 sur la traduction automatique de l&#8217;article original en anglais. Pour plus d&#8217;informations, voir l&#8217;article en anglais. Pouvez vous nous aider Si vous souhaitez corriger la traduction, envoyez-la \u00e0 l&#8217;adresse: translations@nuclear-power.com ou remplissez le formulaire de traduction en ligne. Nous appr\u00e9cions votre aide, nous mettrons \u00e0 jour la traduction le plus rapidement possible. Merci<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le m\u00e8tre cube est l&#8217;unit\u00e9 de volume d\u00e9riv\u00e9e du SI.\u00a0Si une case a un c\u00f4t\u00e9 de 3 m\u00e8tres, le volume sera de 3 m\u00e8tres x 3 m\u00e8tres x 3 m\u00e8tres, soit 27 m\u00e8tres cubes.\u00a0G\u00e9nie thermique Quel est le volume Le volume\u00a0est une\u00a0quantit\u00e9 physique de\u00a0base\u00a0.\u00a0Le volume\u00a0est une quantit\u00e9 d\u00e9riv\u00e9e qui exprime l&#8217;\u00a0\u00e9tendue tridimensionnelle\u00a0d&#8217;un\u00a0objet\u00a0.\u00a0Le volume est souvent &#8230; <a title=\"Qu&#8217;est-ce qu&#8217;un m\u00e8tre cube &#8211; D\u00e9finition\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-quun-metre-cube-definition\/\" aria-label=\"En savoir plus sur Qu&#8217;est-ce qu&#8217;un m\u00e8tre cube &#8211; D\u00e9finition\">Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu&#039;est-ce qu&#039;un m\u00e8tre cube - D\u00e9finition<\/title>\n<meta name=\"description\" content=\"Le m\u00e8tre cube est l&#039;unit\u00e9 de volume d\u00e9riv\u00e9e du SI. 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