Feed Variability and Bulk Vitrification Glass Performance Assessment

Mahoney, Lenna A. ; Vienna, John D.

Pacific Northwest National Laboratory (U.S.)

关键词: Capacity;    Wastes Bulk Vitrification Process;    12 Management Of Radioactive Wastes, And Non-Radioactive Wastes From Nuclear Facilities;    Off-Gas Systems;    Glass;   

DOI  :  10.2172/877048
RP-ID  :  PNNL-14985 Rev.0
RP-ID  :  AC05-76RL01830
RP-ID  :  877048

美国|英语

来源: UNT Digital Library

【 摘 要 】

The supplemental treatment (ST) bulk vitrification process will obtain its feed, consisting of low-activity waste (LAW), from more than one source. One purpose of this letter report is to describe the compositional variability of the feed to ST. The other is to support the M-62-08 decision by providing a preliminary assessment of the effectiveness of bulk vitrification (BV), the process that has been selected to perform supplemental treatment, in handling the ST feed envelope. Roughly nine-tenths of the ST LAW feed will come from the Waste Treatment Plant (WTP) pretreatment. This processed waste is expected to combine (1) a portion of the same LAW feed sent to the WTP melters and (2) a dilute stream that is the product of the condensate from the submerged-bed scrubber (SBS) and the drainage from the electrostatic precipitator (WESP), both of which are part of the LAW off-gas system. The manner in which the off-gas-product stream is concentrated to reduce its volume, and the way in which the excess LAW and off-gas product streams are combined, are part of the interface between WTP and ST and have not been determined. This letter report considers only one possible arrangement, in which half of the total LAW is added to the off-gas product stream, giving an estimated ST feed stream from WTP. (Total LAW equals that portion of LAW sent to the WTP LAW vitrification plant (WTP LAW) plus the LAW not currently treatable in the LAW vitrification plant due to capacity limitations (excess)).