Bonfire-safe low-voltage detonator
- Albuquerque, NM
A column of explosive in a low-voltage detonator which makes it bonfire-safe includes a first layer of an explosive charge of CP, or a primary explosive, and a second layer of a secondary organic explosive charge, such as PETN, which has a degradation temperature lower than the autoignition temperature of the CP or primary explosives. The first layer is composed of a pair of increments disposed in a bore of a housing of the detonator in an ignition region of the explosive column and adjacent to and in contact with an electrical ignition device at one end of the bore. The second layer is composed of a plurality of increments disposed in the housing bore in a transition region of the explosive column next to and in contact with the first layer on a side opposite from the ignition device. The first layer is loaded under a sufficient high pressure, 25 to 40 kpsi, to achieve ignition, whereas the second layer is loaded under a sufficient low pressure, about 10 kpsi, to allow occurrence of DDT. Each increment of the first and second layers has an axial length-to-diameter ratio of one-half.
- Research Organization:
- AT&T
- DOE Contract Number:
- AC04-76DP00789
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4907509
- OSTI ID:
- 867293
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
low-voltage
detonator
column
explosive
makes
layer
charge
cp
primary
secondary
organic
petn
degradation
temperature
autoignition
explosives
composed
pair
increments
disposed
bore
housing
ignition
region
adjacent
contact
electrical
device
plurality
transition
opposite
loaded
sufficient
pressure
25
40
kpsi
achieve
10
allow
occurrence
ddt
increment
layers
axial
length-to-diameter
ratio
one-half
axial length
ignition temperature
explosive charge
ignition device
transition region
diameter ratio
electrical ignition
ignition region
low-voltage detonator
degradation temperature
organic explosive
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