Ionizing radiation for treatment of complete diets for animals may be safely used under the following conditions:
(a) Energy sources. Ionizing radiation is limited to:
(1) Gamma rays for sealed units of the radionuclides cobalt-60 or cesium-137.
(2) Electrons generated from machine sources at energy levels not to exceed 10 million electron volts.
(b) Uses. (1) The ionizing radiation is used or intended for use in single treatment as follows: ------------------------------------------------------------------------
Food for irradiation Limitations Use------------------------------------------------------------------------Bagged complete diets, packaged Absorbed dose: Not Microbial
feeds, feed ingredients, bulk to exceed 50 disinfection,
feeds, animal treats and chews. kiloGrays. Feeds control or
and feed elimination
ingredients
treated by
irradiation
should be
formulated to
account for
nutritional loss.------------------------------------------------------------------------
(2) If an irradiated feed ingredient is less than 5 percent of the final product, the final product can be irradiated without being considered to be re-irradiated. [51 FR 5993, Feb. 19, 1986; 51 FR 8315, Mar. 11, 1986, as amended at 58 FR 18148, Apr. 8, 1993; 66 FR 18540, Apr. 10, 2001]