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Title: Deposition of a radioactive corrosion product in a high-pressure and high temperature water loop and its decontamination

Abstract

The characterization of radioactive corrosion products and the distribution of /sup 60/Co on specimens taken from the Pipe of the Oarai Water Loop of the Japan Material Testing Reactor, with and without decontamination, were investigated. The corrosion product layer was classified in two categories, i.e., a soft crud layer and a hard crud layer. The former is the layer where corrosion products in the water are deposited and the latter is the corroded layer of base material of the pipe. The main chemical states of both layers were ..cap alpha..-Fe/sub 2/O/sub 3/ and Fe/sub 3/O/sub 4/ in equivalent amounts. The /sup 60/Co in the corrosion products was considered to be absorbed into the magnetite. Grain boundary diffusion was suggested as a transport mechanism for penetration into the base material. It was found that soft and hard cruds must be removed to get a high decontamination factor.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Central Research Institute of Electric Power Industry, Energy and Environment Laboratory, 2-11-1, Iwato-Kita Komae-shi, Tokyo 201
OSTI Identifier:
5445004
Resource Type:
Journal Article
Journal Name:
Nucl. Technol.; (United States)
Additional Journal Information:
Journal Volume: 60:3
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; CORROSION PRODUCTS; DECONTAMINATION; JMTR REACTOR; PIPES; ABSORPTION; COBALT 60; DEPOSITION; HIGH PRESSURE; HIGH TEMPERATURE; IRON OXIDES; RADIOACTIVITY; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CHALCOGENIDES; CLEANING; COBALT ISOTOPES; ENRICHED URANIUM REACTORS; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; IRON COMPOUNDS; IRRADIATION REACTORS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MATERIALS TESTING REACTORS; MINUTES LIVING RADIOISOTOPES; NUCLEI; ODD-ODD NUCLEI; OXIDES; OXYGEN COMPOUNDS; RADIOISOTOPES; REACTORS; RESEARCH AND TEST REACTORS; RESEARCH REACTORS; TANK TYPE REACTORS; TEST REACTORS; TRANSITION ELEMENT COMPOUNDS; WATER COOLED REACTORS; WATER MODERATED REACTORS; YEARS LIVING RADIOISOTOPES; 220600* - Nuclear Reactor Technology- Research, Test & Experimental Reactors

Citation Formats

Kanbe, H, Hiroaki, K, Hirohare, I, Tadashi, I, and Toshi, T. Deposition of a radioactive corrosion product in a high-pressure and high temperature water loop and its decontamination. United States: N. p., 1983. Web.
Kanbe, H, Hiroaki, K, Hirohare, I, Tadashi, I, & Toshi, T. Deposition of a radioactive corrosion product in a high-pressure and high temperature water loop and its decontamination. United States.
Kanbe, H, Hiroaki, K, Hirohare, I, Tadashi, I, and Toshi, T. Tue . "Deposition of a radioactive corrosion product in a high-pressure and high temperature water loop and its decontamination". United States.
@article{osti_5445004,
title = {Deposition of a radioactive corrosion product in a high-pressure and high temperature water loop and its decontamination},
author = {Kanbe, H and Hiroaki, K and Hirohare, I and Tadashi, I and Toshi, T},
abstractNote = {The characterization of radioactive corrosion products and the distribution of /sup 60/Co on specimens taken from the Pipe of the Oarai Water Loop of the Japan Material Testing Reactor, with and without decontamination, were investigated. The corrosion product layer was classified in two categories, i.e., a soft crud layer and a hard crud layer. The former is the layer where corrosion products in the water are deposited and the latter is the corroded layer of base material of the pipe. The main chemical states of both layers were ..cap alpha..-Fe/sub 2/O/sub 3/ and Fe/sub 3/O/sub 4/ in equivalent amounts. The /sup 60/Co in the corrosion products was considered to be absorbed into the magnetite. Grain boundary diffusion was suggested as a transport mechanism for penetration into the base material. It was found that soft and hard cruds must be removed to get a high decontamination factor.},
doi = {},
journal = {Nucl. Technol.; (United States)},
number = ,
volume = 60:3,
place = {United States},
year = {1983},
month = {3}
}