Rogério Rivail Rodrigues, A. Z. Mesquita, D. A. Palma
{"title":"Designing a system to detect leaking in fuel elements in Brazilian Triga research reactor","authors":"Rogério Rivail Rodrigues, A. Z. Mesquita, D. A. Palma","doi":"10.1504/IJNEST.2018.10016742","DOIUrl":null,"url":null,"abstract":"The Nuclear Technology Development Centre (CDTN) is a research institute administered by the Brazilian Nuclear Energy Commission (CNEN) located in Belo Horizonte/Brazil. The CDTN is equipped with a Triga Mark I nuclear reactor with almost 60 years of operation. Most of its fuel elements are in the core since the first criticality, and corrosion may occur that threatens the integrity of spent fuel claddings. The reactor coolant must be treated and controlled in order to maintain its low electrical conductivity and pH close to neutrality, in order to minimise the corrosion of the reactor components, mainly the fuel elements. The objective of this work is to present the leak monitoring system developed for the verification of possible leaks in the Triga fuel elements based on the sipping test. A correlation was also developed to find the diameter of a hypothetical small cylindrical hole in the fuel cladding as a function of Cs-137 activity values to be measured.","PeriodicalId":35144,"journal":{"name":"International Journal of Nuclear Energy Science and Technology","volume":"12 1","pages":"239"},"PeriodicalIF":0.0000,"publicationDate":"2018-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Nuclear Energy Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1504/IJNEST.2018.10016742","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Energy","Score":null,"Total":0}
引用次数: 3
Abstract
The Nuclear Technology Development Centre (CDTN) is a research institute administered by the Brazilian Nuclear Energy Commission (CNEN) located in Belo Horizonte/Brazil. The CDTN is equipped with a Triga Mark I nuclear reactor with almost 60 years of operation. Most of its fuel elements are in the core since the first criticality, and corrosion may occur that threatens the integrity of spent fuel claddings. The reactor coolant must be treated and controlled in order to maintain its low electrical conductivity and pH close to neutrality, in order to minimise the corrosion of the reactor components, mainly the fuel elements. The objective of this work is to present the leak monitoring system developed for the verification of possible leaks in the Triga fuel elements based on the sipping test. A correlation was also developed to find the diameter of a hypothetical small cylindrical hole in the fuel cladding as a function of Cs-137 activity values to be measured.
核技术发展中心是一个由巴西核能委员会管理的研究机构，位于巴西贝洛奥里藏特。CDTN配备了一个运行了近60年的Triga Mark I核反应堆。自第一次临界以来，其大部分燃料元件都在堆芯中，可能发生腐蚀，威胁乏燃料包壳的完整性。必须对反应堆冷却剂进行处理和控制，以保持其低电导率和接近中性的pH值，从而最大限度地减少反应堆部件（主要是燃料元件）的腐蚀。本工作的目的是介绍为验证基于啜饮试验的Triga燃料元件中可能存在的泄漏而开发的泄漏监测系统。还开发了一种相关性，以找到燃料包壳中假设的小圆柱形孔的直径作为待测量的Cs-137活度值的函数。
期刊介绍：
Today, nuclear reactors generate nearly one quarter of the electricity in nations representing two thirds of humanity, and other nuclear applications are integral to many aspects of the world economy. Nuclear fission remains an important option for meeting energy requirements and maintaining a balanced worldwide energy policy; with major countries expanding nuclear energy"s role and new countries poised to introduce it, the key issue is not whether the use of nuclear technology will grow worldwide, even if public opinion concerning safety, the economics of nuclear power, and waste disposal issues adversely affect the general acceptance of nuclear power, but whether it will grow fast enough to make a decisive contribution to the global imperative of sustainable development.
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