富集钌的滤材贮存和处置研究

STUDIES ON THE STORAGE AND DISPOSAL OF MATERIALS OF SORPTION OF RADIOACTIVE RUTHENIUM

本工作研究了富集钌后的抗爆硅胶(KSG-1),氧化铁(W-X-14)在高温和室温条件下贮存和处置以及富钌滤材中钌的浸出率;并对硅胶重复使用,氧化铁(W-X-14)熔制富钌玻璃和性能等方面作了探讨。结果表明,富钌滤材直接存放在空气中钌的含量约为10~4Bq·m^(-3),氧化铁(W-X-14)熔制成富钌玻璃的浸出率为(1.10-9.14)×10^(-6)cm·d^(-1)。硅胶重复使用会不断降低钌的捕集容量。富钌滤材直接存放必须防止水的浸泡,存放期间排入大气中的气体必须经过滤后才是安全的。

In this work the storage and disposal of ruthenium loaded antiknock silica gel(KSG-1) and ferric oxide(W-X-14) under both ambient and high temperatures were investigated.The regeneration and reuse of antiknock silica gel, the vitrification of ruthenium loaded ferric oxide and the properties of its glass product were also explored.Experimental results showed that ruthenium activity in the air was higher than 104Bq·m-3 when the ruthenium loaded sorbents were directly stored in the open air.The leaching rate of ruthenium from the glass product of ruthenium loaded ferric oxide was determined to be (1. 10-9.14)×10-6cm·d-1. The repeated use of silica gel gradually decreased its capacity of ruthenium sorption. It was concluded that the ruthenium loaded sorbents should be stored without water soakage and the air surrounding the stored sorbents should be filtered before discharging to the environment.