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Page Title:
Table 5-2. Minimum safe distances between radio frequency (RF) transmitters and electric blasting operations |
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|  DOE-HDBK-1092-98
1. Establishment of procedures to ensure that RF, FM, and TV transmitters having sufficient
output energy to initiate an EED at the test site are either restricted to a safe distance from the
site or not operated. Tables 5-2, 5-3, and 5-4 specify minimum safe distances for the various
types of transmitters at several output power levels.
2. Blasting caps and other low-firing current igniters or detonators shall be kept separate from
explosives at all times, except during actual test charge assembly and setup.
operations.a
Minimum safe distances (ft)
Transmitter power
Commercial AM broadcast
HF transmitters other
(watts)
transmitters
than AM
100
750
750
500
750
1,700
1,000
750
2,400
4,000
750
4,800
5,000
850
5,500
10,000
1,300
7,600
25,000
2,000
12,000
50,000 b
2,800
17,000
100,000
3,900
24,000
500,000 c
8,800
55,000
a
Source: "DOE Explosives Safety Manual"
b
Present maximum power of U.S. broadcast transmitters in commercial AM broadcast frequency range
(0.535 to 1.605 MHz).
c
Present maximum for international broadcast.
operations.a
Minimum safe distances (ft)
Effective radiation
Channels
Channels
power (watts)
2-6 & FM
7-13
UHF
Up to 1,000
1,000
750
600
10,000
1,800
1,300
600
100,000 b
3,200
2,300
1,100
316,000 c
4,300
3,000
1,450
1,000,000
5,800
4,000
2,000
5 000 000 d
9,000
6,200
3,500
10,000,000
10,200
7,400
6,000
100,000,000
--
--
--
a
Source: "DOE Explosives Safety Manual"
b
Present maximum power, channels 2 to 6 and FM.
c
Present maximum power, channels 7 to 13.
d
Present maximum power, channels 14 to 83.
5-9
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