Immobilized high-level waste interim storage alternatives generation and analysis and decision report

Abstract

624997I 23 19% ENGINEERING DATA TRANSMITTAL Originator Remarks:Revision 0 incorporates DOE review comments and decision board recommendations. Abstract: This report presents a study of alternative system architectures to provide onsite interim storage for the immobilized high-level waste produced by the TWRS privatization vendor. It examines the contract and prcgram changes that have occurred and evaluates their impacts on the baseline IHLW interim storage strategy. In addition, this report documents the recommended initial interim storage architecture and implementation path forward. TRADEMARK DISCLAIMER. Referenca herein to any specific commercial product pmcsss, or setvice by trade name, trademark. manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, remmmendation, or favoring by the United States Government or any agency thereof or its contractors or subcontractors. Receiver RemarksPrinted in the United States of America. To obtain copies of this document, contact: WHCBCS Dooument Control Sefvicas, P.O. Box 1970, Mailstop H6-08, Richland WA 99352. Phone (509) 372-2420; Fax (509) U.S. Department of Energy under Contract DE-AC06-96RL13200"F-3899 Revision 0Release form. ii "F-3899Revision 0 DECISION ANALYSIS SUMMARY Problem StatementIs the previous decision to provide for Phase 1 immobilized high-level waste (IHLW) interim storage via retrofit modification of the Hanford Site Canister Storage Building (CSB) still the preferred architecture given new programmatic changes resulting from establishment of the Phase 1B Tank Waste Remediation System-Privatization (TWRS-P) contract? BackgroundSelection of an MLW interim storage architecture to support the TWRS-P Phase 1 was based on a thorough decision process. The recommended (baseline) Phase 1 architecture was retrofit modification of the existing CSB to render it suitable for IHLW interim storage. Once this decision was approved, a conceptual design for CSB retrofit modifications was completed and the cost estimate was validated by the U.S. Department ofEnergy. After these activities, several major programmatic developments occurred that could potentially impact baseline architecture implementation. These developments are as follows. The conceptual design cost estimate for CSB retrofit modifications is greater than that upon which the original selection decision was based.The 137Cs intermediate waste product and non-routine high-level waste product have been eliminated from the Phase 1 MLW interim storage scope.The 3 m tall IHLW canister has been replaced with a 4.5 m tall canister.The minimum number of Phase 1 IHLW canisters that interim storage must potentially accommodate has been reduced, but the maximum number is no longer bounded for Phase 1.The schedule developments, in conjunction with the conceptual design cost estimate increase, are significant enough to warrant a reevaluation of whether the baseline architecture remains the preferred Phase 1 IHLW interim storage architecture from a financial, technical, and logistic...

River Protection Project (RPP) Tank Waste Retrieval and Disposal Mission Technical Baseline Summary Description

“…HNF-3899, Immobilized High-Level Waste Interim Storage Alternatives Generation and Analysis and Decision Report (Calmus 1999a (Calmus 1996b) Responsible Organization…”