Crack initiation testing of thimble tube material under PWR conditions to determine a stress threshold for IASCC

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Crack initiation testing of thimble tube material under PWR conditions to determine a stress threshold for IASCC. / Bosch, Rik-Wouter; Vankeerberghen, Marc; Gérard, Robert; Someville, Frédéric; Gavrilov, Serguei (Peer reviewer).

In: Journal of Nuclear Materials, Vol. 461, No. 06, 03.2015, p. 112-121.

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Bosch, Rik-Wouter ; Vankeerberghen, Marc ; Gérard, Robert ; Someville, Frédéric ; Gavrilov, Serguei. / Crack initiation testing of thimble tube material under PWR conditions to determine a stress threshold for IASCC. In: Journal of Nuclear Materials. 2015 ; Vol. 461, No. 06. pp. 112-121.

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@article{cd9e87d0aedc485e9ba88ce4e6ed88fc,
title = "Crack initiation testing of thimble tube material under PWR conditions to determine a stress threshold for IASCC",
abstract = "IASCC (Irradiation Assisted Stress Corrosion Cracking) crack initiation tests have been carried out on thimble tube material retrieved from a Belgian PWR. The crack initiation tests were carried out by constant load testing of thimble tube specimens at different stress levels. The time-to-failure was determined as a function of the applied stress to find a stress threshold under which no stress corrosion cracking will take place. Over a period of four years, more than 40 specimens have been tested with doses ranging from 45 to 80 dpa at stress levels between 40% and 70% of the irradiated yield stress. Fracture occurred at all stress levels (but not all specimens) although the time-to-failure increased with decreasing stress. The results show that intergranular cracking was the main fracture mode in all failed O-rings. Three of six 80 dpa O-rings subjected to 40 and 45 % of the yield stress didn't fail after six months of testing. Based on these results and a comparison with literature data, an apparent stress limit for IASCC could be estimated at 40% of the irradiated yield stress.",
keywords = "IASCC, flux thimble tube, O-ring testing",
author = "Rik-Wouter Bosch and Marc Vankeerberghen and Robert G{\'e}rard and Fr{\'e}d{\'e}ric Someville and Serguei Gavrilov",
note = "Score = 10",
year = "2015",
month = mar,
doi = "10.1016/j.jnucmat.2015.02.038",
language = "English",
volume = "461",
pages = "112--121",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",
number = "06",

}

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TY - JOUR

T1 - Crack initiation testing of thimble tube material under PWR conditions to determine a stress threshold for IASCC

AU - Bosch, Rik-Wouter

AU - Vankeerberghen, Marc

AU - Gérard, Robert

AU - Someville, Frédéric

A2 - Gavrilov, Serguei

N1 - Score = 10

PY - 2015/3

Y1 - 2015/3

N2 - IASCC (Irradiation Assisted Stress Corrosion Cracking) crack initiation tests have been carried out on thimble tube material retrieved from a Belgian PWR. The crack initiation tests were carried out by constant load testing of thimble tube specimens at different stress levels. The time-to-failure was determined as a function of the applied stress to find a stress threshold under which no stress corrosion cracking will take place. Over a period of four years, more than 40 specimens have been tested with doses ranging from 45 to 80 dpa at stress levels between 40% and 70% of the irradiated yield stress. Fracture occurred at all stress levels (but not all specimens) although the time-to-failure increased with decreasing stress. The results show that intergranular cracking was the main fracture mode in all failed O-rings. Three of six 80 dpa O-rings subjected to 40 and 45 % of the yield stress didn't fail after six months of testing. Based on these results and a comparison with literature data, an apparent stress limit for IASCC could be estimated at 40% of the irradiated yield stress.

AB - IASCC (Irradiation Assisted Stress Corrosion Cracking) crack initiation tests have been carried out on thimble tube material retrieved from a Belgian PWR. The crack initiation tests were carried out by constant load testing of thimble tube specimens at different stress levels. The time-to-failure was determined as a function of the applied stress to find a stress threshold under which no stress corrosion cracking will take place. Over a period of four years, more than 40 specimens have been tested with doses ranging from 45 to 80 dpa at stress levels between 40% and 70% of the irradiated yield stress. Fracture occurred at all stress levels (but not all specimens) although the time-to-failure increased with decreasing stress. The results show that intergranular cracking was the main fracture mode in all failed O-rings. Three of six 80 dpa O-rings subjected to 40 and 45 % of the yield stress didn't fail after six months of testing. Based on these results and a comparison with literature data, an apparent stress limit for IASCC could be estimated at 40% of the irradiated yield stress.

KW - IASCC

KW - flux thimble tube

KW - O-ring testing

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_139902

UR - http://knowledgecentre.sckcen.be/so2/bibref/12804

U2 - 10.1016/j.jnucmat.2015.02.038

DO - 10.1016/j.jnucmat.2015.02.038

M3 - Article

VL - 461

SP - 112

EP - 121

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - 06

ER -

ID: 73573