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Development and evaluation of thermoelectric power measurements as a non destructive
 technique to evaluate ageing of reactor pressure vessel steels

Record Control Number : 200013345
Quality Validation Date : 2001-06-27
Update Date : 2001-06-27
Title in English: Development and evaluation of thermoelectric power measurements as 
		a non destructive technique to evaluate ageing of reactor pressure 
		vessel steels
Author(s) : ACOSTA B;DEBARBERIS L
		JRC, Institute for Advanced Materials, Petten (NL) 
		
		PERLADO J.M
		Instituto de Fusižn Nuclear (DENIM) , E.T.S.I.I, Universidad 
		PolitÚcnica de Madrid JosÚ Gutierrez Abascal Madrid (ES) 
Bibliographic Reference : An oral report given at the: CONE 9 Conference.
		Organised by: ASME, SFEN, JSME.
		Held in: Nice (FR) , 8-12 April, 2001
Abstract : The assessment of material ageing requires normally extensive 
		destructive testing by using different kind of testing and samples. 
		A non-destructive determination of the embrittlement state would 
		extend the usefulness of the surveillance material by reducing the 
		material used for destructive studies and would benefit 
		surveillance programs having an insufficient amount of available 
		test material, and ultimately allowing tests to be performed 
		directly on the component to evaluate.
		
		Therefore there is a need for developing techniques that allow an 
		early detection of micro-structural changes due to embrittlement. 
		In the particular case of nuclear power plants the effect of the 
		neutron irradiation in the beltline area of the reactor pressure 
		vessel should be assessed. Non destructive methods capable of 
		identifying the level of irradiation embrittlement should be the 
		most desirable. Such NDE capabilities would provide substantial 
		early warning of component deterioration and enable utilities to 
		optimise their operating and maintenance practices, resulting in 
		reduced costs and increased asset utilisation.
		
		There is not only the requirement of damage detection capability, 
		but also the need of improving the non-destructive systems in the 
		sense of simplicity of operation, speed and accuracy of the 
		measurement, and of course commercial prizes. Another important 
		feature needing more research on non-destructive evaluation is the 
		possibility of forecasting the material degradation on the basis of 
		the actual material condition. At first instance, relationships 
		between the ageing conditions (temperature, time, irradiation 
		influence, etc) , the material properties and the results of non- 
		destructive analysis must be computed. Afterwards embrittlement 
		trend curves similar to those produced for destructive testing (i.e.
		those provided in the Regulatory Guides of NRC)  should be 
		developed.
Facet Codes : Safety engineering
Availability in Languages : en
Publication Year : 2001
Publication Type : An oral conference paper





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