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Title: Crystallization in high level waste (HLW) glass melters: Savannah River Site operational experience

This paper provides a review of the scaled melter testing that was completed for design input to the Defense Waste Processing Facility (DWPF) melter. Testing with prototype melters provided the data to define the DWPF operating limits to avoid bulk (volume) crystallization in the un-agitated DWPF melter and provided the data to distinguish between spinels generated by refractory corrosion versus spinels that precipitated from the HLW glass melt pool. A review of the crystallization observed with the prototype melters and the full-scale DWPF melters (DWPF Melter 1 and DWPF Melter 2) is included. Examples of actual DWPF melter attainment with Melter 2 are given. The intent is to provide an overview of lessons learned, including some example data, that can be used to advance the development and implementation of an empirical model and operating limit for crystal accumulation for a waste treatment and immobilization plant.
Authors:
 [1] ;  [1] ;  [2]
  1. Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
  2. USDOE Office of River Protection, Richland, WA (United States)
Publication Date:
OSTI Identifier:
1226219
Report Number(s):
SRNL-STI--2015-00298
DOE Contract Number:
AC09-08SR22470
Resource Type:
Conference
Resource Relation:
Conference: Materials Science &Technology Conference and Exhibition 2014 (MS&T'14), Pittsburgh, PA (United States), 12-16 Oct 2014
Research Org:
Savannah River Site (SRS), Aiken, SC (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 42 ENGINEERING; HIGH-LEVEL RADIOACTIVE WASTES; CERAMIC MELTERS; RADIOACTIVE WASTE PROCESSING; CRYSTALLIZATION; SAVANNAH RIVER PLANT; SPINELS; GLASS; CORROSION; PRECIPITATION; TESTING; BUILDUP; CRYSTALS; DESIGN; OPERATION; LIMITING VALUES