United States Nuclear Regulatory Commission - Protecting People and the Environment

The Effect of Thermal and Irradiation Aging Simulation Procedures on Polymer Properties (NUREG/CR-3629, SAND83-2651)

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Publication Information

Manuscript Completed: February 1984
Date Published
: April 1984

Prepared by:
L.D. Bustard and E. Minor
Sandia National Laboratories
Albuquerque. New Mexico 87185, USA
Operated by Sandia Corporation
for the U.S. Department of Energy
Under Contract No. DE-AC04-76DP00789

J. Chenion, F. Carlin, C. Alba, and G. Gaussens
CEA-ORIS LABRA at Saclay
91190 Gif-sur-Yvette. France

M. LeMeur
CEA-DAS-SAF
92260 Fontenay-aux-Roses. France

Prepared for:
Electrical Engineering Branch
Division of Engineering Technology
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington. DC 20555-0001

Under Interagency Agreement 40-550-75

NRC FIN A-1051

Availability Notice

Abstract

Prior to initiating a qualification test on safety-related equipment, the testing sequence for thermal and irradiation aging exposures must be chosen. Likewise, the temperature during irradiation must be selected. Typically, U.S. qualification efforts employ ambient temperature irradiation, while French qualification efforts employ 70° C irradiations. For several polymer materials, the influence of the thermal and irradiation aging sequence, as well as the irradiation temperature (ambient versus 70° C), has been investigated in preparation for Loss-of-Coolant Accident simulated tests.

Ultimate tensile properties at completion of aging are presented for three XLPO and XLPE, five EPR and EPDM, two CSPE (HYPALON), one CPE, one VAMAC, one polydiallylphtalate, and one PPS material.

Bend test results at completion of aging are presented for two TEFZEL materials. Permanent set after compression results are presented for three EPR, one VAMAC, one BUNA N, one Silicone, and one Viton material.

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