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Complete revision to i n c l u d e the hazards associated with the D. Levinskas storage, handling, processing, application, and curing of the polyurea components in facility space as well as transportation. Per HNF-E=-07-338% \

WHC-SD-W151-CSA-001, Rev. 0 LIST OF TERNS ALC air lift circulators AWF Aging Waste Facility CPS Critical i ty Prevention Specification CSER Criticality Safety Evaluation Report DST double-she1 1 tank ECR effective cleaning radius NCAW neutralized current acid waste PUREX Plutonium Uranium Extraction SST sing1 e-she1 1 tank V WHC-SD-W151-CSA-001, Rev. 0 This page intentionally l e f t blank. v i WHC-SD-W151-CSA-001, Rev. 0 1.0 PURPOSE This Criticality Safety Evaluation Report (CSER) documents a review of the criticality safety implications of a process test to be performed in tank 241-AZ-101 (101-AZ). The process test will determine the effectiveness of the retrieval system for mobilization of solids and the practicality of the system for future use in the underground storage tanks at the Hanford Site. The scope of the CSER extends only to the testing and operation of the mixer pumps and does not include the transfer of waste from the tank. Justification is provided that a nuclear criticality is extremely unlikely, if not impossible, in this tank. This CSER is necessary because of the potential that mixing, suspension, and settling of fissile material bearing solids may result in a localized configuration that is a criticality safety concern. the process test for the two mixer pumps installed in tank 101-AZ is the suspension, mixing, and settling of plutonium bearing solids currently being stored in the tank. A primary objective o f 1-1 WHC-SO-W151-CSA-001, Rev. 0 This page intentionally left blank.

Page 2 of lbt' 1. ECM (use no. from pg. 1) 650980 76. Design 17. Cost Impact 18. ScheduLe Impact (days) Verification Required ENGINEERING CONSTRUCTION [] ,,s Additional [] $ Additiona([] $ 1mprovement 20. Other Affected Documents: (NOTE: Documents Listed below wi[[ not be revised by this ECN.) Signatures betow indicate that the signing organizationhas been notified of other affected documents Listed below. Document Number/Revision Oocunent Number/Revision Document Nunber Revision Most operating documents were changed concurrent with deactivation activities.