Data Sheet - PM-147
Pure Beta emitter
Beta Max = 0.225 MeV (100%)
Maximum Range in Air = 18 inches
Physical Half Life = 2.5 years
Biological Half Life = 10 years
Effective Half Life = 2 years
Found as sealed source in
LAW Sight 1340010508850 3mCi Pm-147.
M16A1 rifle sight 1005000739421 1mCi Pm-147
Both are being phased out of use.
Maximum Activity per unit: 3 mCi per LAW source/1 mCi per rifle sight source.
Pm-147 may be detected using thin window G.M. Radiac equipment. Pm-147 may be quantified using liquid scintillation counting.
POSTINGS AND LABELING:
Instruments and article containing Promethium 147 have radiation symbol on the equipment. Users will ensure that the symbol is not marred or defaced. Equipment with a marred or defaced symbol will be turned in for repair/replacement.
Bulk storage areas will be posted “Caution Radioactive Materials”, and will post a copy of NRC Form-3, and US POSTER 385-1-1 BLOCK 0862. Posting may be on the inside of a building near the outside door in a conspicuous location.
CONTAMINATION SURVEY SCHEDULE
The action level is 3 nCi. per smear.
Any area found to be contaminated will be decontaminated and
resurveyed to below removable contamination levels.
Millicurie quantities of Pm-147 do not present an external exposure hazard. TLDs or Film Badges are not required.
ALI is 1E+2 µCi.
Bioassay is only required in the event of a potential intake of 10 µCi. Such events are unforeseen in the present source configuration.
10% excreted immediately, 45% to the liver and 45% to the Skeleton where it stays with a biological half-life of 3500 days.
Call DSN 314.370.6284 or send email