None

This document summarizes by stack number the amount of radioactivity discharged from the facilities of Chemical Processing Division, Atlantic Richfield Hanford Company. Emission data for 231-Z Building and 2724-W, Laundry Building, which are operated by other AEC Contractors are not available for this report. Total beta, alpha and I{sup l3l} radioactive emissions from the stacks for 1970 were as follows: alpha (Pu, assumed) 1.59 {times} 10{sup {minus}1} C, alpha (U, assumed) 1.44 {times} 10{sup {minus}3} C, beta 1.93C, and I{sup 131} 4.92 {times} 10{sup {minus}1} C. Air samples taken continuously from gaseous release facilities were analyzed for total beta and alpha activity (and iodine activity, where applicable). Where sample data were not available, the total radioactive emission was adjusted by using the average emission rate prior to the subject period; or where activity was near constant, by using the daily average as a base. A gamma scan of the 291-S stack is included in the report.

Results are reported from a comprehensive study of radioactive wastes discharged to the environment in the 200 Area (chemical processing area) of the Hanford Reservation. Guides for the emission of gaseous waste were being met for the discharge of /sup 131/I, /sup 90/Sr, mixed fission products, and /sup 239/Pu. Treat ment systems for reduction of NO/sub 2/ from several stacks were proposed, and a prototype system for the removal of UOs from stack gases was developed and tested. Significant reductions of radioactivity in soil were achieved during a three to four year period by changes in operating procedures and minor expenditure of funds for process and equipment improvements. Emphasis was placed on the treatment of liquid wastes for the removal of /sup 137/Cs, /sup 90/Sr, and /sup 239/P u, from those streams prior to discharge to the environs. Improved methods for the monitoring and cycling of radioactive wastes, cooling waters, and steam condensates from process vessels were also developed. (CH)

None

None

None