Laboratory Tests on Post-Filtration Precipitation in the WTP Pretreatment Process

Russell, Renee L. ; Peterson, Reid A. ; Rinehart, Donald E. ; Crum, Jarrod V.

关键词: AR FACILITIES;    FLOWSHEETS;    LEACHING;    PRECIPITATION;    ULTRAFILTRATION;    WASHING;    RADIOACTIVE WASTE PROCESSING;    HANFORD RESERVATION;    PROCESS DEVELOPMENT UNITS;   

DOI  :  10.2172/969619
RP-ID  :  PNNL-18876
RP-ID  :  WTP-RPT-205 Rev 0
PID  :  OSTI ID: 969619
Others  :  Other: 830403000
Others  :  TRN: US1000408

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

Pacific Northwest National Laboratory (PNNL) has been tasked by Bechtel National Inc. (BNI) on the River Protection Project-Hanford Tank Waste Treatment and Immobilization Plant (RPP-WTP) project to perform research and development activities to resolve technical issues identified for the Pretreatment Facility (PTF). The Pretreatment Engineering Platform (PEP) was designed, constructed, and operated as part of a plan to respond to issue M12, "Undemonstrated Leaching Processes," of the External Flowsheet Review Team (EFRT) issue response plan (Barnes et al. 2006). The PEP is a 1/4.5-scale test platform designed to simulate the WTP pretreatment caustic leaching, oxidative leaching, ultrafiltration solids concentration, and slurry washing processes. The PEP replicates the WTP leaching processes using prototypic equipment and control strategies. A simplified flow diagram of the PEP system is shown in Figure 1.1. Two operating scenarios are currently being evaluated for the ultrafiltration process (UFP) and leaching operations. The first scenario has caustic leaching performed in the UFP-2 ultrafiltration feed vessels (i.e., vessel UFP-VSL-T02A in the PEP; and vessels UFP-VSL-00002A and B in the WTP PTF). The second scenario has caustic leaching conducted in the UFP-1 ultrafiltration feed preparation vessels (i.e., vessels UFP-VSL-T01A and B in the PEP; vessels UFP-VSL-00001A and B in the WTP PTF).