An End State Methodology for Identifying Technology Needs for Environmental Management, with an Example from the Hanford Site Tanks (1999) / Chapter Skim
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The committee believes that the recommended end state based approach can be applied to DOE waste management In general, not just to waste In tanics. The approach is illustrated through an example based on the tanks at the DOE Hanford Site In southeastern Washington state, the location of some 60 percent by volume of the tank waste residues.
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There is a traceable path from the problem to the solution through specifying the initial states or conditions, defining a reference goal and alternatives to accommodate uncertainties, identifying functional approaches to move from the initial problem to the solution, assessing the adequacy of existing technology, and implementing technology development only in those areas where technology is unsatisfactory (e.g., too costly) or inadequate to accomplish technical goals.
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The end state assumed for HEW is immobilization In borosilicate glass logs stored in a passively cooled, on-site temporary storage facility, and certified for transport to and acceptance in a deep geologic repository.2 The end state for LAW for the committee's reference scenario in the example is an immobilized form containing most of the bulk chemicals from the tanks and a small amount of radionuclides. The LAW is assumed to be disposed of in on-site near-surface facilities.
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The first is the in situ disposal scenario, which may be used if tank cleanup cost estimates exceed allocated budgets (assuming that In situ disposal, including consideration of possible increased characterization and change in regulations, is indeed less costly than other remediation options) or if it is found that some tanks can be remediated at relatively low risk using in situ techniques that do not include waste retrieval.
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Nevertheless, more explicit consideration of alternatives as proposed herein and greater organizational commitment to a risk-based approach could make the overall DOE program more robust with respect to unexpected developments, as well as provide a more transparent rationale for a particular approach to eventually be adopted from among the candidate approaches.
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· The committee concludes that an end state based approach for identifying technology development needs would greatly facilitate the efficiency and visibility of the DOE EM efforts to provide technologies required to remediate the HEW in tanks throughout the DOE complex, thereby providing rationale and background for appropriate funding. The committee concludes that (~)
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The need to apply the end state based approach is highlighted by the extensive uncertainty surrounding the entire tank cleanup program, including the role and responsibilities of DOE and contractors that may be part of the privatization program. · The various steps taken in implementing the end state based approach should be documented in detail for the custodians of the waste and those persons engaged in technology development.
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8 Ar' End State Methodology for Identifying Technology Needs The committee provides in this report a description and an example of application of an end state methodology that can lead to a rationalized technology development program. The committee believes it is highly desirable for DOE to apply such a methodology to waste remediation activities and other comparable assignments to define technology development needs clearly, conserve resources, meet schedules and cost targets, reduce risk of technology failures, and provide visibility to stakeholders of the course of action being taken to remediate sites and facilities.
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