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Title: Glass/Ceramic Interactions in the Can-In-Canister Configuration for Disposal of Excess Weapons Plutonium

Abstract

A can-in-canister waste package design has been proposed for disposal of pyrochlore rich ceramics containing excess weapons plutonium. The can-in-canister configuration consists of a high-level waste (HLW) canister fitted with a rack that holds minicanisters containing the ceramic. The HLW canister is then filled with glass. The pressurized unsaturated flow (PUF) technique was used to investigate waste form/waste form interactions that may occur when water penetrates the waste containers and contacts the waste forms. Volumetric water content was observed to increase steadily from accumulation of water mass as waters of hydration associated with alteration phases formed on the glass surface. Periodic excursions in effluent electrical conductivity and pH were monitored and correlated with secondary phases formed during the test. Plutonium exited the PUF system primarily as filterable particulates. However, effluent Pu and Gd concentrations were found to decrease with time and remained at near detection limits after approximately 250 days, except during transient pH excursions. These results indicate that both Pu and Gd will be retained in the can-in-canister waste package to a very high degree.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
15001708
Report Number(s):
PNNL-SA-31745
NN6001020; TRN: US200406%%190
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Scientific Basis for Nuclear Waste Management XXIII, Symposium, 29 Nov.-2 Dec.1999, Boston, MA, USA. Mat. Res. Soc. Symp. Proc., 608:345-352
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; CERAMICS; CONFIGURATION; CONTAINERS; ELECTRIC CONDUCTIVITY; GLASS; HYDRATION; PARTICULATES; PLUTONIUM; PYROCHLORE; RADIOACTIVE WASTES; SENSITIVITY; TRANSIENTS; WASTE FORMS; WASTES; WEAPONS

Citation Formats

McGrail, B Peter, Martin, P F, Schaef, Herbert T, Lindenmeier, Clark W, and Owen, Antionette T. Glass/Ceramic Interactions in the Can-In-Canister Configuration for Disposal of Excess Weapons Plutonium. United States: N. p., 2000. Web.
McGrail, B Peter, Martin, P F, Schaef, Herbert T, Lindenmeier, Clark W, & Owen, Antionette T. Glass/Ceramic Interactions in the Can-In-Canister Configuration for Disposal of Excess Weapons Plutonium. United States.
McGrail, B Peter, Martin, P F, Schaef, Herbert T, Lindenmeier, Clark W, and Owen, Antionette T. 2000. "Glass/Ceramic Interactions in the Can-In-Canister Configuration for Disposal of Excess Weapons Plutonium". United States.
@article{osti_15001708,
title = {Glass/Ceramic Interactions in the Can-In-Canister Configuration for Disposal of Excess Weapons Plutonium},
author = {McGrail, B Peter and Martin, P F and Schaef, Herbert T and Lindenmeier, Clark W and Owen, Antionette T},
abstractNote = {A can-in-canister waste package design has been proposed for disposal of pyrochlore rich ceramics containing excess weapons plutonium. The can-in-canister configuration consists of a high-level waste (HLW) canister fitted with a rack that holds minicanisters containing the ceramic. The HLW canister is then filled with glass. The pressurized unsaturated flow (PUF) technique was used to investigate waste form/waste form interactions that may occur when water penetrates the waste containers and contacts the waste forms. Volumetric water content was observed to increase steadily from accumulation of water mass as waters of hydration associated with alteration phases formed on the glass surface. Periodic excursions in effluent electrical conductivity and pH were monitored and correlated with secondary phases formed during the test. Plutonium exited the PUF system primarily as filterable particulates. However, effluent Pu and Gd concentrations were found to decrease with time and remained at near detection limits after approximately 250 days, except during transient pH excursions. These results indicate that both Pu and Gd will be retained in the can-in-canister waste package to a very high degree.},
doi = {},
url = {https://www.osti.gov/biblio/15001708}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {12}
}

Conference:
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