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Title: Seal welded cast iron nuclear waste container

Abstract

This invention identifies methods and articles designed to circumvent metallurgical problems associated with hermetically closing an all cast iron nuclear waste package by welding. It involves welding nickel-carbon alloy inserts which are bonded to the mating plug and main body components of the package. The welding inserts might be bonded in place during casting of the package components. When the waste package closure weld is made, the most severe thermal effects of the process are restricted to the nickel-carbon insert material which is far better able to accommodate them than is cast iron. Use of nickel-carbon weld inserts should eliminate any need for pre-weld and post-weld heat treatments which are a problem to apply to nuclear waste packages. Although the waste package closure weld approach described results in a dissimilar metal combination, the relative surface area of nickel-to-iron, their electrochemical relationship, and the presence of graphite in both materials will act to prevent any galvanic corrosion problem.

Inventors:
 [1];  [2]
  1. (Pittsburgh, PA)
  2. (Murrysville, PA)
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA
OSTI Identifier:
866394
Patent Number(s):
US 4700863
Application Number:
06/910,241
Assignee:
United States of America as represented by United States (Washington, DC) PNNL
DOE Contract Number:  
EY-76-C-06-1830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
seal; welded; cast; iron; nuclear; waste; container; identifies; methods; articles; designed; circumvent; metallurgical; associated; hermetically; closing; package; welding; involves; nickel-carbon; alloy; inserts; bonded; mating; plug; main; components; casting; closure; weld; severe; thermal; effects; process; restricted; insert; material; accommodate; eliminate; pre-weld; post-weld; heat; treatments; apply; packages; approach; described; results; dissimilar; metal; combination; relative; surface; nickel-to-iron; electrochemical; relationship; presence; graphite; materials; prevent; galvanic; corrosion; cast iron; heat treatment; nuclear waste; waste package; thermal effects; waste container; heat treatments; waste packages; similar metal; iron nuclear; /220/148/228/250/376/403/428/976/

Citation Formats

Filippi, Arthur M., and Sprecace, Richard P. Seal welded cast iron nuclear waste container. United States: N. p., 1987. Web.
Filippi, Arthur M., & Sprecace, Richard P. Seal welded cast iron nuclear waste container. United States.
Filippi, Arthur M., and Sprecace, Richard P. Thu . "Seal welded cast iron nuclear waste container". United States. https://www.osti.gov/servlets/purl/866394.
@article{osti_866394,
title = {Seal welded cast iron nuclear waste container},
author = {Filippi, Arthur M. and Sprecace, Richard P.},
abstractNote = {This invention identifies methods and articles designed to circumvent metallurgical problems associated with hermetically closing an all cast iron nuclear waste package by welding. It involves welding nickel-carbon alloy inserts which are bonded to the mating plug and main body components of the package. The welding inserts might be bonded in place during casting of the package components. When the waste package closure weld is made, the most severe thermal effects of the process are restricted to the nickel-carbon insert material which is far better able to accommodate them than is cast iron. Use of nickel-carbon weld inserts should eliminate any need for pre-weld and post-weld heat treatments which are a problem to apply to nuclear waste packages. Although the waste package closure weld approach described results in a dissimilar metal combination, the relative surface area of nickel-to-iron, their electrochemical relationship, and the presence of graphite in both materials will act to prevent any galvanic corrosion problem.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Patent:

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