Iron-59 (Fe-59) cont'd - doe-hdbk-1106-97

DOE-HDBK-1106-97

Instructor's Notes

8. Critical organ:

Liver and spleen for inhalation.

Lower large intestine for ingestion.

9. Personnel monitoring: Dosimeter, finger rings - fecal

analysis may be used to determine uptake for weeks or

months after handling. Urinalysis is recommended from

4-24 hours after handling.

10. ALI:

0.3 mCi (1 x 107 Bq) by inhalation.

0.8 mCi (3 x 107 Bq) by ingestion.

11. Shielding: 0.38 inch (9.7 mm) of lead is the half value

layer.

12. Special considerations:

Near an unshielded Fe-59 source, dose rates from

beta radiation can be much higher than dose rates

due to gamma radiation.

Avoid direct eye exposure.

Avoid skin exposure.