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題名 | 高選擇性媒質於放化分析之應用(1)--低放射性發料中Sr-89,Sr-90快速分離及量測方法之建立=High Selective Medium Applied in Radio-Chemistry Analysis(Ⅰ)--Quick Separation and Accurate Analysis of Sr in Radioactive Wastes |
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作者 | 張澤民; 門立中; Chang, Tser-min; Men, Lee-chung; |
期刊 | 台電工程月刊 |
出版日期 | 19981000 |
卷期 | 602 1998.10[民87.10] |
頁次 | 頁44-54 |
分類號 | 449.8 |
語文 | chi |
關鍵詞 | Sr-89/90分析; 高選擇性樹脂; 謝侖可夫計測; Sr analysis; High selective resin; Cerenkov counting; |
中文摘要 | 核電廠運轉規範規定,排放廢水及低放射性廢料均需測定其中之 Sr 方可排放 至海水中或予以儲存處置。 本實驗利用美國 Eichrom 公司發展出對鍶具有高選擇性之離子 交換樹脂( Sr . spec Resin ),先將鍶純化再以液體閃爍分析儀 Cerenkov 計測法,量 度由 Sr 衰變與�s Y 生長造成計數率的變化,計算出 Sr 與�s Sr 個別之活度。 本方法快 速、簡便且準確,非常適宜於核電廠排放水及低放射性廢料中 Sr 之偵測。本方法對鍶之回 收率在 85% 以上,活度大於 100dpm 時之相對誤差在 5% 以內, 若取 30ml 樣品測試,其 最小偵測值為 5.92 × 10 μ Ci/mL. |
英文摘要 | A rapid and accurate method for determination of Sr in radioactive wastes from nuclear power plants was build up. First of all, the commercialized high selective ion exchange resin (Sr. Spec) was applies purify the strontium, then Sr was measured by liquid scintillation counter with Cerenkov counting method. The variance of count rate from the decay of Sr and the in growth of �sSr was also mesured to get the individual activity of Sr and �sSr. This method is simple, quick and accurate. The Chemical yield of strontium is about 85%. The relative deviation is less the 5% as the activity is over 100dpm. For a 300mL liquid effluent following the prescribed experimental conditions and 60 min counting interval, the minimum detectable activity (MDA) is 5.92×10 μ Ci/mL. |
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