The effects of high gamma-irradiation on hydraulic oils

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Fusion Engineering and Design Pub Date : 2025-04-17 DOI:10.1016/j.fusengdes.2025.115095

Daoan Kang , Rongrong Luo , Chao Huang , Jindou Liu , Zhiyuan Zhang , Hongxi Ren , Pengyuan Li

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Abstract

The effects of irradiation are crucial for the application of robots in nuclear environments. A key factor influencing the performance of hydraulic robots in these settings is the radiation resistance of hydraulic oil. This study investigates the patterns and mechanisms of static gamma-ray irradiation effects on aviation hydraulic oils No 10 and No 15 under various irradiation doses. Property analyses of the hydraulic oil samples, conducted before and after irradiation, demonstrate that both oils remain largely unaffected by doses below 10 kGy. However, at irradiation doses ranging from 100 kGy to 1 MGy, significant reductions in kinematic viscosity and initial boiling point are observed, accompanied with a sharp increase in acid number and potential. Fourier Transform Infrared Spectroscopy (FTIR) and Nuclear Magnetic Resonance (NMR) analyses reveal the decomposition of tertiary alcohols into primary alcohols, as well as the transformation of long-chain alkanes and cycloalkanes into unsaturated C = C hydrocarbons. This decomposition, which intensifies with increasing irradiation doses, is identified as the primary cause of the observed properties deterioration, occurring primarily between the onset of irradiation and 1MGy. This study provides valuable theoretical and experimental insights for the application of aviation hydraulic oils in nuclear environments.

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高γ辐照对液压油的影响

辐照效应对机器人在核环境中的应用至关重要。在这些环境中，影响液压机器人性能的一个关键因素是液压油的抗辐射性。研究了不同辐照剂量下航空液压油10号和15号的静态γ射线辐照效应规律和机理。在辐照前后对液压油样品进行的特性分析表明，两种油在低于10 kGy的剂量下基本不受影响。然而，在100 kGy至1 MGy的辐照剂量范围内，观察到运动粘度和初始沸点显著降低，同时酸数和势急剧增加。傅里叶变换红外光谱（FTIR）和核磁共振（NMR）分析显示叔醇分解为伯醇，长链烷烃和环烷烃转化为不饱和C = C烃。这种分解随着辐照剂量的增加而加剧，被确定为所观察到的性质恶化的主要原因，主要发生在辐照开始到1毫戈瑞之间。本研究为航空液压油在核环境中的应用提供了有价值的理论和实验见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fusion Engineering and Design 工程技术-核科学技术

CiteScore

3.50

自引率

23.50%

发文量

275

审稿时长

3.8 months

期刊介绍： The journal accepts papers about experiments (both plasma and technology), theory, models, methods, and designs in areas relating to technology, engineering, and applied science aspects of magnetic and inertial fusion energy. Specific areas of interest include: MFE and IFE design studies for experiments and reactors; fusion nuclear technologies and materials, including blankets and shields; analysis of reactor plasmas; plasma heating, fuelling, and vacuum systems; drivers, targets, and special technologies for IFE, controls and diagnostics; fuel cycle analysis and tritium reprocessing and handling; operations and remote maintenance of reactors; safety, decommissioning, and waste management; economic and environmental analysis of components and systems.