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Title: Heat transfer analyses for grout disposal of radioactive double-shell slurry and customer wastes

Grout immobilization is being considered by Rockwell Hanford Operations (Rockwell Hanford) as a permanent disposal method for several radioactive waste streams. These include disposal of customer and double-shell slurry wastes in earthen trenches and in single-shell underground waste storage tanks. Heat transfer studies have previously been made to determine the maximum heat loading for grout disposal of various wastes under similar conditions, but a sensitivity analysis of temperature profiles to input parameters was needed. This document presents the results of heat transfer calculations for trenches containing grouted customer and double-shell slurry wastes and for in situ disposal of double-shell wastes in single-shell, domed concrete storage tanks. It discusses the conditions that lead to maximum grout temperatures of 250/sup 0/F during the curing stage and 350/sup 0/F thereafter and shows the dependence of these temperatures on input parameters such as soil and grout thermal conductivity, grout specific heat, waste loading, and disposal geometries. Transient heat transfer calculations were made using the HEATING6 computer code to predict temperature profiles in solidified low-level radioactive waste disposal scenarios at the Rockwell Hanford site. The calculations provide guidance for the development of safe, environmentally acceptable grout formulas for the Transportable Grout Facility. 11 refs.
Authors:
; ;
Publication Date:
OSTI Identifier:
6529654
Report Number(s):
ORNL/TM-9227
ON: DE87009782; TRN: 87-023245
DOE Contract Number:
AC05-84OR21400
Resource Type:
Technical Report
Research Org:
Oak Ridge National Lab., TN (USA)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; HANFORD RESERVATION; RADIOACTIVE WASTE DISPOSAL; HEAT TRANSFER; TEMPERATURE DISTRIBUTION; RADIOACTIVE WASTES; GROUTING; UNDERGROUND DISPOSAL; CALCULATION METHODS; COMPUTER CODES; H CODES; RADIATIVE DECAY; REACTION HEAT; SOLIDIFICATION; TIME DEPENDENCE; ENERGY TRANSFER; ENTHALPY; MANAGEMENT; MATERIALS; NATIONAL ORGANIZATIONS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; RADIOACTIVE MATERIALS; THERMODYNAMIC PROPERTIES; US DOE; US ERDA; US ORGANIZATIONS; WASTE DISPOSAL; WASTE MANAGEMENT; WASTES 052002* -- Nuclear Fuels-- Waste Disposal & Storage; 053000 -- Nuclear Fuels-- Environmental Aspects