Data Sheet - PM-147

PHYSICAL CHARACTERISTICS:

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

USES:

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.

DETECTION:

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.

DOSIMETRY:

Millicurie quantities of Pm-147 do not present an external exposure hazard. TLDs or Film Badges are not required.

BIOASSAY REQUIREMENTS

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.

BIOLOGICAL FATE

10% excreted immediately, 45% to the liver and 45% to the Skeleton where it stays with a biological half-life of 3500 days.

Contact

Call DSN 314.370.6284 or send email