SB 742-1
deformation at cartridge case and primer joint, perform the proportional counter is required to measure limits specified in
paragraph j below.
following:
i. Exact procedure for measuring activity will depend upon
(1) Mark a line across primer head and cartridge case.
equipment and facilities available.
Each swipe must be
(2) Apply disassembly torque of 175 inch pounds.
marked so that a specific cartridge can be located again.
Measurement of activity shall be performed by, or under
(3) Check line to verify no movement.
guidance of, a Health Physicist or Radiation Protection Officer.
i. Surveillance samples with projectiles exhibiting lateral
j. Activity levels exceeding background by 500 disin-
movement are not considered defects unless one or more of
tegrations per minute (DPM) alpha or 100 DPM beta-gamma
following conditions are noted:
may indicate a potential corrosion problem. Although activity
(1) Cartridge case deformation preventing profile and levels at these DPM values are not considered to present a
alignment gaging or chambering.
health hazard, it is desirable to identify initiation of a corrosion
problem long before contamination results.
(2) Crimp out of groove.
k. Any cartridge with reading that exceeds established
(3) Evidence of propellant dusting on outside of
background level by above amounts will be sealed in plastic,
cartridge case or projectile.
and the cartridge will be returned for examination to a facility
licensed to disassemble DU cartridges (as directed by JMC).
(4) There shall be no movement of M900 projectile
within the cartridge case; i.e., rotating, wobbling, and/or
l. Whenever activity levels exceed 500 disintegrations per
evidence of an unsecured manner.
minute (DPM) immediately notify the office in para 1-5d(21(h))
and in para 1-5d(20)(b).
m. A report will also be submitted to the addresses in
a. Chance of any DU particles migrating to surface of
projectile is considered remote, therefore, swipe test will only paragraph l above when any activity levels are measured which
exceed background levels of the counter being used by a factor
be performed under either of the following circumstances:
of two.
This report will include background and swipe
(1) Damaged cartridge with possible core exposure
readings; type, serial number, and calibration date of test
instrument; and any other information deemed relevant.
(2) Cartridge
with
visible
corrosion
(powdery
substance) on sabot, sabot gaps or windshield interfaces.
n. Following procedure can be used to monitor
pallet/outer pack prior to shipment. This procedure is not
b. The following safety precautions should be observed
authorized for individual cartridges.
when performing swipe test:
(1) Swipe at least a 300 square centimeter area of
(1) Do not eat or drink while swipe testing.
pallet/outer pack.
Radioactive materials pose the greatest harm if taken
internally, such as by ingestion. Keep hands away from face.
(2) Check swipe with an AN/PDR 27, 56 or 60 radiac
meter, or equivalent. Reading of twice background is indicative
(2) Do not perform swipe test with exposed open cuts
of contamination.
or sores. Cover any open cuts or sores with bandages and
wear protective rubber gloves. Radioactive material can also
(3) If readings indicate contamination, notify offices in
be taken internally through open cuts.
paragraph l above.
(3) Do not clean projectile prior to swipe test.
J-8. References.
(4) Wash hands thoroughly with soap and water when
a. TM 9-1300-251-20.
testing is completed.
b. TM 9-1300-251-34.
c. Fill in information required on front of swipe folder to
c. TM 43-0001-28.
include date, time, swipe number, location and technician.
d. TM 9-2350-305-10.
d. Swipe does not have to be removed from paper strip
during test.
e. DMWR 9-1315-C523-X1.
e. Using moderate pressure, wipe surface of projectile
f. DMWR 9-1315-C524-X20.
along seams between sabot segments and seam of junction
between windshield and sabot with swipe. Swipe should also
g. TM 9-2350-356-14
include
any
area
of
the
projectile
with
visible
h. TB 9-1300-278
powder/corrosion. Use one swipe per cartridge.
i. AR 11-9
f. Once swipe has been taken, care must be taken to
prevent cross contamination. Do not touch side of swipe paper
that was used for taking swipe.
g. Fold paper strip over once so that swipe is covered.
Place swipe in resealable plastic pouch.
h. Swipes taken on individual cartridges will be tested for
radioactivity with a proportional counter. Proportional counter
may be located at a central location, and swipes forwarded for
reading. Field locations may use AN/PDR 27 and AN/PDR 60
for identification of gross radiation hazards only.
The
Previous Page
