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On the Amount of Moderation in the CANDU Lattice

机译：关于Candu格子的适度

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摘要

Throughout the years, various reports and training manuals on CANada Deuterium Uranium (CANDU) reactors have mentioned that the CANDU lattice is overmoderated. Overmoderation is not always defined in such documents but often appears associated with the positive void reactivity of the CANDU lattice. Some documents refer, logically, to overmoderation as meaning that the lattice pitch is larger than the pitch that maximizes the infinite-lattice multiplication constant but do not demonstrate this is the case for CANDU. We demonstrate that in fact, the CANDU lattice is undermoderated; that is, the current 28.575-cm lattice pitch is smaller than the pitch for which the infinite-lattice multiplication constant reaches its maximum. We hypothesize that the misconception of CANDU overmoderation may have originated from attributing the CANDU positive void reactivity to too much moderator by incorrectly equating the effect of losing heavy water coolant with the effect of losing heavy water moderator.
机译：在整个年内，提到了加拿大氘铀（Candu）反应堆的各种报告和培训手册已提及蜡烛晶格被过度发布。过度编码并不总是在这些文件中定义，但通常出现与Candu格子的正无效反应性相关联。有些文件逻辑地引用过修改，含义晶格间距大于最大化无限晶格乘法常数但不会证明这是坎普卢的情况。我们证明，事实上，坎普拉格被滥产了;也就是说，电流28.575-cm的晶格间距小于无限晶格倍增常数达到其最大值的间距。我们假设通过不正确地等同于输掉重水调节器的效果，对蜡烛过度的误解可能已经归因于过多的调节剂来归因于过多的主持人。

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  • 来源
    《Nuclear Technology》 |2021年第10期|1633-1638|共6页
  • 作者

    Benjamin Rouben; Eleodor Nichita;

  • 作者单位

    12 & 1 Consulting Toronto Ontario Canada McMaster University Engineering Physics Department Hamilton Ontario Canada Ontario Tech University Faculty of Energy Systems and Nuclear Science Oshawa Ontario Canada;

    Ontario Tech University Faculty of Energy Systems and Nuclear Science Oshawa Ontario Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    CANDU; reactivity; undermoderation;

    机译：C and U;reactivity;under moderation;

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