Pollution Prevention Technologies for Plutonium Processing
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A. U.S. Department of Energy Laboratory LALP-93-92 POLLUTION PREVENTION TECHNOLOGIES FOR PLUTONIUM PROCESSING NUCLEAR MATERIALS TECHNOLOGY 1994 LALP-93-92 April 1994 Published by Los Alamos National Laboratory Nuclear Materials Technology Division MS E500 Los Alamos, New Mexico 87545 Coordinator K.K.S. Pillay Editors Carolyn K. Robinson Joan Farnum Graphic Designer Susan L. Carlson Printing Coordination Guadalupe D. Archuleta Brenda R. Valdez For More Information K.K.S. Pillay (505) 667-5428 Page 65 Photos: figure 3—B 1420 01 figure 4—B 1425 15 Los Alamos National Laboratory is operated by the University of California for the U.S. Department of Energy under contract W-7405-ENG-36. An Affirmative Action/Equal Opportunity Employer. This report was prepared as an account of work sponsored by the United States Government. Neither the Regents of the University of California, the United States Government, nor any of their employees makes any warranty, expressed or implied, or assumes legal liability or responsibility for the accuracy, com- pleteness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, mark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the Regents of the University of California, the United States Government or any agency thereof. The views and opinions expressed herein do not necessarily state or reflect those of the Regents of the University of California, the United States Government, or any agency thereof. Contents C o n t e n t s Preface Preventing Pollution From Plutonium Processing by K.K.S. Pillay 3 Overviews - Waste Minimization Technologies Off-Gas Scrubbing by W. Brad Smith 7 Acid Recovery and Recycle by Thomas R. Mills 12 Hydrochloric Acid Waste Stream Polishing by Louis D. Schulte, Richard R. Salazar, Benjie T. Martinez, John R. FitzPatrick, and Bradley S. Schake 16 A Novel Liquid-Liquid Extraction Technique by Daniel J.Kathios, Gordon D. Jarvinen, Stephen L. Yarbro, and Barbara F. Smith 20 Electrochemical Treatment of Mixed Hazardous Waste by Wayne H. Smith, Christine Zawodzinski, Kenneth R. Martinez, and Aaron L. Swanson 37 Application of Freeze-Drying Technology to Decontamination of Radioactive Liquids by Nicholas V. Coppa 44 Nuclear Applications for Magnetic Separations by Larry R. Avens, et al. 52 Distillation Separation of Actinides from Waste Salts by Eduardo Garcia, Vonda R. Dole, Walter J. Griego, John J. Lovato, James A. McNeese, and Keith Axler 61 Evaluating Existing Partitioning Agents for Processing Hanford High-Level Waste Solutions by S. Fredric Marsh, Zita V. Svitra, and Scott M. Bowen 66 Gas Pycnometry for Density Determination of Plutonium Parts by J. David Olivas, S. Dale Soderquist, Henry W. Randolph, Susan L. Collins, Darren Verebelyi, William J. Randall, and Gregory D. Teese 71 Contents continued on next page 1 Contents C O N T E N T S Continued Plutonium Dry Machining by Mark R. Miller 75 Technical Issues in Plutonium Storage by John M. Haschke and Joseph C. Martz 80 Overviews - Facility Operations Waste Management at Technical Area 55: A Historical Perspective and Status Report by Bill J. McKerley, James J. Balkey, and Ronald E.Wieneke 88 Future of Waste Management at the Los Alamos Plutonium Facility by Ronald E. Wieneke 94 Nuclear Materials Technology 1994 Report 2 Preface P r e f a c e Preventing Pollution From Plutonium Processing K. K. S. Pillay Introduction Nuclear Materials Technology Pollution is a dirty word. No one has to make a case anymore for the need for pollution prevention or the related concept of environ- mental management. Although the history of pollution control leg- islation in the United States dates back to the River and Harbor Act of 1899, the past four decades have been most active in developing and administering numerous environmental regulations. This pro- cess of administering environmental regulations has accelerated in recent years and has become a critical factor in the quality of life in these United States. Since the passage of the Atomic Energy Act in 1954, the Congress of the United States has promul- gated numerous environmental statutes. Figure 1 shows the ac- cumulation of environmental statues and their amendments that are presently applicable to nuclear defense facilities. These statutes have been codified into over 9000 regulations by federal agencies.1 The Environmental Protection Agency (EPA) alone has over 125,000 employees administering these statutes and regulations. There is an equal number of environmental regulators at the state and local government levels. Although radioactive wastes have been accumulating in the United States for the past half century, only during the last two decades has there been a concerted effort to address the problems of long-term isolation of these wastes from the human environment. After considerable study and debate, the U.S. program for Fig.1. Accumulation of environmental statutes and their amendments radioactive waste management since the passage of the Atomic Energy Act in 1954. was codified in the Nuclear Waste Policy Act of 1982.2 3 Preface Preventing Pollution From Plutonium Processing According to this legislation, The Nuclear Materials Technol- The following paragraphs the U.S. Department of Energy ogy (NMT) Division, in this new examine the legacy of nuclear (DOE) has the responsibility cultural climate, adopted a stra- waste, the new priority of waste to develop strategies, systems, tegic goal to systematically minimization, responsible waste and technologies for the long- eliminate the adverse environ- management, and technological term isolation of all spent mental impacts associated with challenges for the future. nuclear fuels, high-level wastes, operating the Los Alamos Pluto- and transuranic wastes in the nium Facility. This ambitious The Legacy of Nuclear Waste United States. Because of the goal of a committed group of The term “nuclear waste” is unique socio-political atmo- people in the Los Alamos generally used to represent all sphere surrounding radioactive nuclear technology community radioactive waste materials re- waste management, there are is the theme of this compilation gardless of their origin, material considerable challenges to the of technology initiatives. Our form, or radioactivity levels. scientific community for devel- strategic goal is not only part of Nuclear wastes originate from a oping technological solutions a survival strategy but also rep- multitude of activities involving that are acceptable to a resents our readiness to solve nuclear technologies in both concerned free society. national environmental prob- the civilian and defense sectors. lems associated with nuclear The steady accumulation of For nearly four decades, the U.S. processing facilities and, nuclear wastes over the past half nuclear defense facilities sought thereby, help alleviate public century has attracted consider- refuge under the Atomic Energy and governmental concerns. able public attention during the Act and claimed sovereign im- past two decades. Following the munity from compliance with Since September 1992, several reactor accidents at Three Mile most of the environmental regu- activities within NMT Division Island and Chernobyl, there lations. In response to increasing have been postponed because have been overwhelming ex- public pressure during the past of the FFCA and the long and pressions of public concerns few years, the defense sector has laborious negotiations that are over safety of all nuclear facili- undergone a cultural shift that required to reach a facility- ties and the safe management has changed past attitudes to- specific agreement with the of accumulated nuclear wastes ward complying with environ- EPA. On July 19, 1993, DOE as well as those that are being mental regulations. This shift Secretary Hazel O’Leary ap- generated. has culminated in the passage proved the Los Alamos agree- of the 1992 Federal Facility ment with Region 6 of the EPA. Studies have shown that the Compliance Act (FFCA) and According to this agreement, public’s perception of risk from other complementary regula- full compliance with the FFCA nuclear waste is similar to those tions and executive orders.3,4 is expected by the year 2000. of highly energetic, catastrophic The FFCA gives federal facilities During these negotiations, events. This perception is a three-year period to develop NMT Division began to imple- qualitatively incorrect because detailed plans for complying ment its strategic plan to meet radioactive wastes have far with all applicable environmen- all regulatory requirements of lower energy levels in compari- tal regulations. This particular waste minimization and pollu- son with reactor accidents, legislation has been a great tion prevention and to transform earthquakes, volcanic eruptions, motivator to all federal facilities, the Los Alamos plutonium pro- etc. An educational process that including the Los Alamos Pluto- cessing operations into an envi- conveys realistic risks of nuclear nium Processing Facility, to ronmentally benign activity. wastes has to be a necessary modify past practices and to In developing those technolo- part of an overall program of become conscious of the envi- gies required to meet our goals, nuclear waste management. ronmental impacts of all its we will also serve the needs of activities. the