Multifactor stress aging of electrical insulation. Final report 1 Feb 89-30 Sep 90
Capacitor-grade polypropylene films were aged under multiple stresses (electrical, thermal, radiation) using a 2MW thermal nuclear reactor. Thermal and electrical stresses were found to slightly decrease both the AC and DC breakdown voltages. Radiation stresses were found to increase the breakdown voltages. The same trends were seen in volume resistivity. The radiation effects dominate both the thermal and electrical effects and are attributed to increased crystallinity of the polypropylene. However, mechanical properties are significantly degraded by radiation damage, and degree of breakdown enhancements are seen for combined stresses. Computer simulation has been performed showing the magnitude of the neutrino signal from a 100 kilocurie tritium source, under the geometrical conditions of the experiments at Los Angeles National Laboratory, TA-33, is about an order of magnitude smaller than the gravity signal from a 2600 gr mass (the assumed value for the mass of the source). The observations were performed by using Professor Joe Weber's torsion balance, a room-temperature instrument.
- Research Organization:
- State Univ. of New York, Buffalo, NY (USA). Dept. of Electrical Engineering
- OSTI ID:
- 5741853
- Report Number(s):
- AD-A-232915/9/XAB; CNN: AFOSR-89-0272
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603 -- Materials-- Properties
360605* -- Materials-- Radiation Effects
AGING
AMBIENT TEMPERATURE
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAPACITORS
CRYSTALS
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
ELECTRICAL PROPERTIES
EQUIPMENT
GEOMETRY
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATHEMATICS
MECHANICAL PROPERTIES
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
POLYMERS
POLYOLEFINS
POLYPROPYLENE
RADIATION EFFECTS
RADIOISOTOPES
SIMULATION
STRESSES
THERMAL STRESSES
TRITIUM
YEARS LIVING RADIOISOTOPES