【摘要】 随着国内反应堆退役工作的逐步推进，将有大量放射性石墨需要处理或处置。石墨的处理方法与石墨的放射性源项及活度密切相关，¹⁴C是其主要源项之一。本文基于石墨高温氧化、Carb-Sorb E吸收CO₂的技术路线，建立了石墨中¹⁴C的快速分析方法，前处理时长约2 h。对于0.4 g石墨样品，本方法的化学回收率可达98%以上，检出限为0.068 Bq·g^-1,对³H、³⁶Cl、⁶⁰Co等干扰核素的去污因子为10³～10⁵。该方法已成功用于某研究堆退役石墨样品的分析。更多还原

【Abstract】 With the gradual advance of reactor decommissioning in China, there will be a large amount of radioactive graphite to be disposed.The disposal of graphite is closely related to its radioactive source terms and radioactivity, and ¹⁴C is one of the main source terms.Based on the technical route of high temperature oxidation of graphite and CO₂ absorbed by Carb-Sorb E,a rapid analysis procedure of ¹⁴C in graphite was established.The duration of pretreatment was about 2 h.The chemical recovery of this procedure is more than 98%,and the limited detection is 0.068 Bq·g^-1 for 0.4 g graphite.Decontamination factors（DFs）of major interfering radionuclides, such as ³H,³⁶Cl, ⁶⁰Co, were 10³～10⁵.This procedure has been successfully used for analysis of ¹⁴C present in graphite in a decommissioning reactor.更多还原