HYDRODYNAMIC PRESSURE MEASUREMENT IN GRANITE NEAR AN UNDERGROUND NUCLEAR EXPLOSION
A peak shock pressure of 664 ction in DDT-C/ 40 kbar was measured in granite near the underground nuclear explosion Hardhat'' at the Nevada Test Site in February 1962. Two Al plates fitted with pin contactors were grouted into drill holes at ranges of 15.0 and 15.9 ft from the center of detonation; the closer instrument was ruined by moisture prior to the explosion. Pulses generated by the shock front hitting pins in the instrument at 15.9 ft were recorded on an accurate time base. The shock speed in Al was computed from the recorded data. This speed, together with the known Hugoniot equations of state of Al and granite, was used to calculate the peak shock pressure in granite. The result is in good agreement with calculations based on hydrodynamic theory and with independent measurements. A second set of pins, intended to measure the free-surface velocity of the Al plate (and hence the mass velocity behind the shock front), did not function properly. (auth)
- Research Organization:
- California. Univ., Livermore. Lawrence Radiation Lab.
- DOE Contract Number:
- W-7405-ENG-48
- NSA Number:
- NSA-17-018910
- OSTI ID:
- 4730199
- Report Number(s):
- UCRL-7221
- Country of Publication:
- United States
- Language:
- English
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Calculation of the Shock Wave From an Underground Nuclear Explosion in Granite
CALCULATION OF THE SHOCK WAVE FROM AN UNDERGROUND NUCLEAR EXPLOSION IN GRANITE