Razouk R, Beaumont O, Failleau G, Hay B, Plumeri S
Laboratoire National de Métrologie et D'essais (LNE), 29 Avenue Roger Hennequin, 78197 Trappes Cedex, France.
The French National Radioactive Waste Management Agency (Andra), 1/7 Rue Jean Monnet, 92293 Chatenay Malabry Cedex, France.
Rev Sci Instrum. 2018 Mar;89(3):034902. doi: 10.1063/1.5003214.
The estimation and control of the thermal power released by the radioactive waste packages are a key parameter in the management of radioactive waste geological repository sites. In the framework of the European project "Metrology for decommissioning nuclear facilities," the French National Agency of Radioactive Waste Management (ANDRA) collaborates with Laboratoire National de Métrologie et D'essais in order to measure the thermal power up to 500 W of typical real size radioactive waste packages (of at least 0.175 m) with an uncertainty better than 5% by using a measurement method traceable to the international system of units. One of the selected metrological approaches is based on the principles of air flow calorimetry. This paper describes in detail the development of the air flow calorimeter prototype as well as the design of a radioactive waste package simulator used for its calibration. Results obtained from the calibration of the calorimeter and from the determination of thermal powers are presented here with an investigation of the measurement uncertainties.
放射性废物包释放热功率的估算与控制是放射性废物地质处置场管理中的一个关键参数。在欧洲“退役核设施计量”项目框架内，法国国家放射性废物管理局（ANDRA）与国家计量与测试实验室合作，旨在通过采用可溯源至国际单位制的测量方法，对典型实际尺寸（至少0.175米）且热功率高达500瓦的放射性废物包进行测量，测量不确定度优于5%。所选用的计量方法之一基于气流量热法原理。本文详细介绍了气流量热计原型的研制以及用于其校准的放射性废物包模拟器的设计。这里给出了量热计校准和热功率测定所获得的结果，并对测量不确定度进行了研究。
