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首页> 外文会议>International conference on nuclear engineering >HIGH EFFICIENCY GAMMA-BETA BLIND ALPHA SPECTROMETRY FOR NUCLEAR ENERGY APPLICATIONS
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HIGH EFFICIENCY GAMMA-BETA BLIND ALPHA SPECTROMETRY FOR NUCLEAR ENERGY APPLICATIONS

机译：高效核-BETA盲核光谱技术，用于核能应用

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A novel, Centrifugally Tensioned Metastable Fluid Detector (CTMFD) sensor technology has been developed over the last decade to demonstrate high selective sensitivity and detection efficiency to various forms of radiation for wide-ranging conditions (e.g., power level, safeguards, security, and health physics) relevant to the nuclear energy industry. The CTMFD operates by tensioning a liquid with centrifugal force to weaken the bonds in the liquid to the point whereby even a femto-scale nuclear particle interactions can break the fluid and cause a detectable vaporization cascade. The operating principle has only peripheral similarity to the superheated bubble chamber based superheated droplet detectors (SDDs); instead, CTMFDs utilize mechanical "tension pressure" instead of thermal superheat offering a lot of practical advantages. CTMFDs have been used to detect a variety of alpha and neutron emitting sources in near real-time. The CTMFD is selectively blind to gamma photons and betas allowing for detection of alphas and neutrons in extreme gamma/beta background environments such as spent fuel reprocessing plants or under full power conditions within an operating nuclear reactor itself. The selective sensitivity allows for differentiation between alpha emitters including the isotopes of Plutonium. Mixtures of Plutonium isotopes have been measured in ratios of 1:1, 2:1, and 3:1 Pu-238:Pu-239 with successful differentiation. Due to the lack of gamma-beta background interference, the CTMFD's LLD can be effectively reduced to zero and hence, is inherently more sensitive than scintillation based alpha spectrometers or SDDs and has been proven capable to detect below femtogram quantities of Plutonium-238. Plutonium is also easily distinguishable from Neptunium making it easy to measure the Plutonium concentration in the NPEX stream of a UREX reprocessing facility. The CTMFD has been calibrated for alphas from Americium (5.5 MeV) and Curium (～6 MeV) as well. The CTMFD has furthermore, recently also been used to detect spontaneous and induced fission events which can be differentiated from alpha decay allowing for detection of fissionable material in a mixture of isotopes. This paper discusses these transformational developments which are also being entered for real-world commercial use.
机译：在过去的十年中，已开发出一种新颖的离心张紧亚稳态流体检测器（CTMFD）传感器技术，以证明在各种条件下（例如功率水平，保障，安全性和健康状况）对各种形式的辐射具有很高的选择性灵敏度和检测效率。物理）。 CTMFD通过在离心力作用下拉紧液体来削弱液体中的结合力，从而使毫微微级的核粒子相互作用也能破坏液体并导致可检测的汽化级联。其工作原理仅与基于过热气泡室的过热液滴检测器（SDD）相似。取而代之的是，CTMFD利用机械“张力压力”代替热过热，从而提供了许多实用的优势。 CTMFD已用于近实时检测各种α和中子发射源。 CTMFD对伽马光子和β视而不见，可在极端伽马/β背景环境（例如乏燃料后处理厂）或运行中的核反应堆本身处于满功率条件下检测α和中子。选择性灵敏度允许区分包括emitter同位素在内的α发射体。 successful同位素的混合物已按成功的区分度以1：1、2：1和3：1的Pu-238：Pu-239比例进行了测量。由于缺乏伽玛-β背景干扰，CTMFD的LLD可以有效地减少到零，因此，其本质上比基于闪烁的α光谱仪或SDD灵敏，并且已被证明能够检测到飞克量以下的lu 238。 easily也很容易与distinguish区别开来，从而易于测量UREX后处理设施NPEX流中的P浓度。 CTMFD也已针对for（5.5 MeV）和Cur（〜6 MeV）中的α进行了校准。此外，CTMFD最近还用于检测自发和诱发的裂变事件，可以将其与α衰变区分开来，从而可以检测同位素混合物中的可裂变物质。本文讨论了这些变革性的发展，这些发展也正在进入现实世界的商业用途。

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