Effects of irradiation dose rate and thermal aging on changes in the properties of elastomeric materials (EPR-CSPE) for cable insulation and sheathing

Author

Pinel, Brigitte ; Gueguen, Virginie

Author_Institution

Electricite de France, Clamart, France

fYear

1991

fDate

25-27 Sep 1991

Firstpage

944

Lastpage

949

Abstract

In order to estimate cable service life in PWR plants, a research program has been established and performed on EPR/CSPE (ethylene-propylene rubber/chlorosulfonated polyethylene) LOCA (loss-of-coolant accident) cables based on a study of the dose and dose rate effects and the temperature. The authors present the results of accelerated tests and physicochemical studies (IR, mechanical properties, oxidation (EPR), and chlorine (CSPE) stabilities) carried out to characterize the degree of degradation of the materials. EPR seems to be sensitive to the dose rate effect with oxidation at low dose rate and crosslinking at high dose rate. CSPE is degraded by crosslinking. For both EPR and CSPE, the activation energy of oxidation stability and dehydrochlorination, respectively, have been evaluated as a function of the thermal aging

Keywords

ageing; elastomers; electrets; fission reactor materials; fission reactor safety; organic insulating materials; radiation effects; LOCA; PWR plants; cable insulation; crosslinking; dehydrochlorination; elastomeric materials; electret; estimate cable service life; ethylene-propylene rubber/chlorosulfonated polyethylene; irradiation dose rate; loss-of-coolant accident; oxidation stability; sheathing; thermal aging; Accidents; Aging; Cables; Life estimation; Materials testing; Oxidation; Paramagnetic resonance; Polyethylene; Rubber; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)

Conference_Location

Berlin

Print_ISBN

0-7803-0112-9

Type

conf

DOI

10.1109/ISE.1991.167341

Filename

167341