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           - Superseded.<br />\n
          The protection of nuclear power plants following a design basis event is provided automatically by<br />\n
          the protection systems as defined by IEEE Std 279-1971 (ANSI N42.7-1972), Criteria for Protection<br />\n
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          \t\t\t\t<br />\n
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          """
        #metaKeywords: null
        #metaDescription: null
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    -pageCount: 82
    -documents: Doctrine\ORM\PersistentCollection {#135738 …}
    -favorites: Doctrine\ORM\PersistentCollection {#135736 …}
  }
  +label: "Historical"
  +icon: "historical"
  -mostRecentAttributeCode: "most_recent"
  -localeContext: Sylius\Component\Locale\Context\CompositeLocaleContext {#1833 …}
}