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Title: Pre-shot predictions and instrumentation of the KUCHEN experiment

Abstract

We calculated the peak particle velocity and peak acceleration at gage locations for the three explosions of the KUCHEN experiment. Our predictions of the peak particle velocities and accelerations are consistent with a variety of other estimates which include surface motion obtained from underground nuclear explosions in alluvium, a tamped HE explosion at the Nevada Test Site, and the ConWep estimates which are used for conventional weapons effects calculations. We also predict the air blast over-pressure and the temperature rise in the air inside the cavity of the decoupled explosion and find that the peak pressure at the top of the cylindrical cavity is about 50 bars and that the shock-wave reverberations inside the cavity have a period of about 100 ms. After 500 ms, the shock wave reverberations inside the cavity of the decoupled explosion are considerably attenuated and the equilibrium state before any significant diffusion or thermal conduction occurs is a pressure of 5 bars and a temperature of 1100{degrees}C. The instrumentation of the experiment is designed for containment diagnostics, near-field in-situ motion, and ground motion monitoring. The containment diagnostics include an air-blast overpressure gage, an RF Interferometer, a strain gage, two thermocouples and two cavity pressure gages.more » Additional gages detect the presence of hazardous detonation products. Near field motion diagnostics include four three-axis accelerometers at various depths and a single three-axis velocity gage. The seismic ground motion sensors are located in 24 distinct locations and distributed in a modified symmetrical pattern around the borehole. Using a simple constitutive model which correctly predicts peak particle velocity data in porous alluvium, we calculated a decoupling factor that varies from 4 to 11 in the frequency range between 1 and 30 hertz. Using that same model, we calculated a decoupling factor of 15 in a spherical cavity with equivalent volume.« less

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
83118
Report Number(s):
UCRL-ID-121036
ON: DE95014514
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: May 1995
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; 35 ARMS CONTROL; NUCLEAR EXPLOSIONS; SIMULATION; UNDERGROUND EXPLOSIONS; DETECTION; ARMS CONTROL; VERIFICATION; NUCLEAR EXPLOSION DETECTION; SEISMIC DETECTION; DECOUPLING; NEVADA TEST SITE; EXPERIMENT PLANNING; PRESSURE GAGES; STRAIN GAGES; INTERFEROMETERS; GROUND MOTION; SEISMIC DETECTORS; THERMOCOUPLES; MATHEMATICAL MODELS

Citation Formats

Moran, B., Heinle, R.A., and Harben, P.E. Pre-shot predictions and instrumentation of the KUCHEN experiment. United States: N. p., 1995. Web. doi:10.2172/83118.
Moran, B., Heinle, R.A., & Harben, P.E. Pre-shot predictions and instrumentation of the KUCHEN experiment. United States. doi:10.2172/83118.
Moran, B., Heinle, R.A., and Harben, P.E. Mon . "Pre-shot predictions and instrumentation of the KUCHEN experiment". United States. doi:10.2172/83118. https://www.osti.gov/servlets/purl/83118.
@article{osti_83118,
title = {Pre-shot predictions and instrumentation of the KUCHEN experiment},
author = {Moran, B. and Heinle, R.A. and Harben, P.E.},
abstractNote = {We calculated the peak particle velocity and peak acceleration at gage locations for the three explosions of the KUCHEN experiment. Our predictions of the peak particle velocities and accelerations are consistent with a variety of other estimates which include surface motion obtained from underground nuclear explosions in alluvium, a tamped HE explosion at the Nevada Test Site, and the ConWep estimates which are used for conventional weapons effects calculations. We also predict the air blast over-pressure and the temperature rise in the air inside the cavity of the decoupled explosion and find that the peak pressure at the top of the cylindrical cavity is about 50 bars and that the shock-wave reverberations inside the cavity have a period of about 100 ms. After 500 ms, the shock wave reverberations inside the cavity of the decoupled explosion are considerably attenuated and the equilibrium state before any significant diffusion or thermal conduction occurs is a pressure of 5 bars and a temperature of 1100{degrees}C. The instrumentation of the experiment is designed for containment diagnostics, near-field in-situ motion, and ground motion monitoring. The containment diagnostics include an air-blast overpressure gage, an RF Interferometer, a strain gage, two thermocouples and two cavity pressure gages. Additional gages detect the presence of hazardous detonation products. Near field motion diagnostics include four three-axis accelerometers at various depths and a single three-axis velocity gage. The seismic ground motion sensors are located in 24 distinct locations and distributed in a modified symmetrical pattern around the borehole. Using a simple constitutive model which correctly predicts peak particle velocity data in porous alluvium, we calculated a decoupling factor that varies from 4 to 11 in the frequency range between 1 and 30 hertz. Using that same model, we calculated a decoupling factor of 15 in a spherical cavity with equivalent volume.},
doi = {10.2172/83118},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 1995},
month = {Mon May 01 00:00:00 EDT 1995}
}

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