Abstract

A procedure for determining the specific activity of carbon-14 in samples of irradiated nuclear fuel (INF) has been developed and metrologically certified. The procedure is based on oxidation of ¹⁴C to ¹⁴CO₂ and its catching with alkaline traps, followed by determination of its β-activity by the method of liquid-scintillation counting (LSC). The specific activity of ¹⁴C was determined in two samples of mixed nitride uranium-plutonium (MNUP) fuel irradiated in a BN-600 reactor.

中文翻译：

---

确定辐照混合氮化物铀钚核燃料样品中碳 14 的比活度

摘要

已开发出确定辐照核燃料 (INF) 样品中碳 14 比活度的程序并通过了计量认证。该程序基于将¹⁴ C氧化为¹⁴ CO ₂并用碱性捕集器对其进行捕获，然后通过液体闪烁计数 (LSC) 方法测定其 β 活性。在 BN-600 反应堆中辐照的两个混合氮化物铀钚 (MNUP) 燃料样品中测定了¹⁴ C的比活度。