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Precision of Internal Dose Assessments
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Guidance on Long-Term Reevaluation of Intakes


DOE-STD-1121-98
for any confirmed intake. Peer review by another qualified dosimetrist is recommended, and is
particularly important for assigned doses which exceed administrative control levels or dose limits.
Table XI. Inhalation of Aged 6% Plutonium Mixture, No DTPA Given at Worksite
Days
Since
When Results
What Can be Said at
Problems or
Intake
Measurements
Are Known
What Point
Comments
Can say if HE,50 is more
If anything is
Same
3000-s chest count;
Same day or
or less than 12 rems
detected, should
day
second voiding spot
first thing next
administer DTPA
urine; emergency
morning
processing
1
12-h urine, emergency
End of second
If nothing in urine or
If nothing in urine or
processing; second
day
chest, then intake is
chest, then DTPA is
chest count if first
class W < 5 rems, or
not needed.
result detected activity
class Y < 10 rems
If Pu alpha in urine >
2 dpm, then consider
initiating DTPA.
From bioassay data,
2
24-h total urine,
Morning of fifth
If nothing in sample
still won't know
expedite processing
day
(and previous chest
counts), then HE,50 class
inhalation class of
W < 500 mrem, class Y
material
< 5 rems
LEPD(b) results:
!
If nothing in LEPD
1-3
Total fecal excretion
analysis, then HE,50 <
6-7 days after
for first 3 days after
intake(a)
500 mrem
intake
IPA(c) priority:
If nothing in IPA, then
Two processings by
lab: 1) LEPD(b)
HE,50 < 100 mrem
16-17 days after
expedited processing;
intake
2) IPA(c) priority
processing
(a)
If more than one sample is produced in a day, the samples should be composited into a single sample
before analysis.
(b)
LEPD: Code for lab analysis, referring to non-destructive low-energy photon spectrometry; measures
x rays from 241Am.
(c)
IPA: isotopic plutonium and 241Am via alpha spectrometry.
101


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