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Anomalous fracture toughness of irradiated Cr-MoV - Reactor pressure vessel steel

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Abstract

The base metal Crack Opening Displacement (COD) specimens of the irradiation-induced embrittlement surveillance programme in Loviisa 1 revealed an anomalous behaviour of K{sub JC} compared to the Charpy-V results and to expected results according to standards: about 20% of the COD specimens showed an exceptionally low fracture toughness. Abnormal test specimens were analyzed through fractography, metallography and repeated tests using reconstitution technique: the anomalous behaviour appears to be caused by incorrect pre-fatigue cracking of base metal COD specimens. 7 refs., 9 figs.
Authors:
Ahistrand, R [1] 
  1. Imatran Voima Oy (IVO), Helsinki (Finland)
Publication Date:
Dec 31, 1993
Product Type:
Conference
Report Number:
NEA-CSNI-R-94-1; CONF-9309237-
Reference Number:
SCA: 360106; 360103; 210200; PA: AIX-28:029683; EDB-97:055553; SN: 97001764680
Resource Relation:
Conference: International Atomic Energy Agency (IAEA) specialist meeting on irradiation embrittlement and optimization of annealing, Paris (France), 20-23 Sep 1993; Other Information: PBD: 1993; Related Information: Is Part Of Irradiation embrittlement and optimisation of annealing; PB: 292 p.
Subject:
36 MATERIALS SCIENCE; 21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS; PRESSURE VESSELS; PHYSICAL RADIATION EFFECTS; STEELS; MECHANICAL TESTS; SAMPLE PREPARATION; ANNEALING; CRACKS; DUCTILE-BRITTLE TRANSITIONS; EMBRITTLEMENT; FRACTOGRAPHY; FRACTURE PROPERTIES; NEUTRON FLUENCE; REACTOR MONITORING SYSTEMS; TRANSITION TEMPERATURE; WWER-5 REACTOR
OSTI ID:
455781
Research Organizations:
Nuclear Energy Agency, 75 - Paris (France). Committee on the Safety of Nuclear Installations
Country of Origin:
NEA
Language:
English
Other Identifying Numbers:
Other: ON: DE97620233; TRN: XN9600158029683
Availability:
INIS; OSTI as DE97620233
Submitting Site:
INIS
Size:
pp. 1-10
Announcement Date:
Apr 18, 1997

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Citation Formats

Ahistrand, R. Anomalous fracture toughness of irradiated Cr-MoV - Reactor pressure vessel steel. NEA: N. p., 1993. Web.
Ahistrand, R. Anomalous fracture toughness of irradiated Cr-MoV - Reactor pressure vessel steel. NEA.
Ahistrand, R. 1993. "Anomalous fracture toughness of irradiated Cr-MoV - Reactor pressure vessel steel." NEA.
@misc{etde_455781,
title = {Anomalous fracture toughness of irradiated Cr-MoV - Reactor pressure vessel steel}
 author = {Ahistrand, R}
 abstractNote = {The base metal Crack Opening Displacement (COD) specimens of the irradiation-induced embrittlement surveillance programme in Loviisa 1 revealed an anomalous behaviour of K{sub JC} compared to the Charpy-V results and to expected results according to standards: about 20% of the COD specimens showed an exceptionally low fracture toughness. Abnormal test specimens were analyzed through fractography, metallography and repeated tests using reconstitution technique: the anomalous behaviour appears to be caused by incorrect pre-fatigue cracking of base metal COD specimens. 7 refs., 9 figs.}
 place = {NEA}
 year = {1993}
 month = {Dec}
 }