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Title: Irradiation-induced instability of MnS precipitates and its possible contribution to IASCC in light water reactors

Abstract

Although a number of candidate mechanisms have been proposed to participate in the IASCC phenomenon, it is not clear at this time that all of the contributing mechanisms have been identified. A new mechanism was proposed by Garner and Greenwood as a potential contribution to IASCC that involves the radiation-induced release into solution of sulphur and other deleterious elements that are normally concentrated into MnS precipitates. The instability arises from the combined action of the transmutation of manganese to iron, cascade-induced mixing and the very strong action of the inverse Kirkendall effect. The latter mechanism acts as a pump to export manganese from the precipitate surface and to replace it primarily with iron, as well as smaller amounts of chromium, nickel and other lesser elements. Evidence previously presented by Chung and coworkers appears to show that MnS precipitates in typical 300 series stainless steels become progressively depleted in manganese and enriched with iron as irradiation proceeds in boiling water reactor neutron spectra. It is shown in this paper that transmutation alone is insufficient to produce the observed behavior.

Authors:
;  [1];  [2]
  1. Pacific Northwest National Lab., Richland, WA (United States)
  2. Argonne National Lab., IL (United States)
Publication Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
Nuclear Regulatory Commission, Washington, DC (United States); USDOE Office of Energy Research, Washington, DC (United States)
OSTI Identifier:
539891
Report Number(s):
ANL/ET/CP-94587; CONF-970832-
ON: DE98000642; TRN: 98:008506
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 8. international symposium on environmental degradation of materials in nuclear power systems-water reactors, Amelia Island, FL (United States), 10-14 Aug 1997; Other Information: PBD: 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS; AUSTENITIC STEELS; STRESS CORROSION; MANGANESE SULFIDES; PRECIPITATION; INSTABILITY; IRRADIATION; KIRKENDALL EFFECT; NEUTRON SPECTRA; STAINLESS STEELS; CRACKS; BWR TYPE REACTORS; PWR TYPE REACTORS

Citation Formats

Garner, F A, Greenwood, L R, and Chung, H M. Irradiation-induced instability of MnS precipitates and its possible contribution to IASCC in light water reactors. United States: N. p., 1997. Web.
Garner, F A, Greenwood, L R, & Chung, H M. Irradiation-induced instability of MnS precipitates and its possible contribution to IASCC in light water reactors. United States.
Garner, F A, Greenwood, L R, and Chung, H M. Wed . "Irradiation-induced instability of MnS precipitates and its possible contribution to IASCC in light water reactors". United States. https://www.osti.gov/servlets/purl/539891.
@article{osti_539891,
title = {Irradiation-induced instability of MnS precipitates and its possible contribution to IASCC in light water reactors},
author = {Garner, F A and Greenwood, L R and Chung, H M},
abstractNote = {Although a number of candidate mechanisms have been proposed to participate in the IASCC phenomenon, it is not clear at this time that all of the contributing mechanisms have been identified. A new mechanism was proposed by Garner and Greenwood as a potential contribution to IASCC that involves the radiation-induced release into solution of sulphur and other deleterious elements that are normally concentrated into MnS precipitates. The instability arises from the combined action of the transmutation of manganese to iron, cascade-induced mixing and the very strong action of the inverse Kirkendall effect. The latter mechanism acts as a pump to export manganese from the precipitate surface and to replace it primarily with iron, as well as smaller amounts of chromium, nickel and other lesser elements. Evidence previously presented by Chung and coworkers appears to show that MnS precipitates in typical 300 series stainless steels become progressively depleted in manganese and enriched with iron as irradiation proceeds in boiling water reactor neutron spectra. It is shown in this paper that transmutation alone is insufficient to produce the observed behavior.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {10}
}

Conference:
Other availability
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