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Total System Model Version 6.0 GROA Department Design and Bases

The Total System Model (TSM) is a planning tool that estimates the logistic and cost impacts of
various operational assumptions in accepting radioactive wastes. Waste forms currently tracked
are Commercial Spent Nuclear Fuel (CSNF), U.S. Department of Energy (DOE) spent nuclear
fuel (DOE SNF), and defense high-level (radioactive) waste (HLW). The TSM uses a TSM
Preprocessor (TSMPP) to generate the cask loads and target dates for shipments from waste
sites. The TSM then tracks these wastes from pickup at the waste sites until repository

STARBUCS: A Prototypic SCALE Control Module for Automated Criticality Safety Analyses Using Burnup Credit

STARBUCS is a new prototypic analysis sequence for performing automated criticality safety analyses of spent fuel systems employing burnup credit. A depletion analysis calculation for each of the burnup-dependent regions of a spent fuel assembly, or other system containing spent fuel, is performed using the ORIGEN-ARP sequence of SCALE. The spent fuel compositions are then used to generate resonance self-shielded cross sections for each region of the problem, which are applied in a three-dimensional criticality safety calculation using the KENO V.a code.

Budget and Financial Management Improvements to the Nuclear Waste Fund (NWF)

The paper discusses issues and options for improving the budgeting and financial management
of the Nuclear Waste Fund (NWF). The issues and options would facilitate implementation of
any changes in program scope and content, or any changes in organization and management
structure. .
The three issues for possible administrative action include:
1. Instituting financial management enhancements to foster multi-year budgeting and
appropriations; combined accrual and cash budgeting; and separate capital budgeting;

Sensitivity and Uncertainty Analysis of Commercial Reactor Criticals for Burnup Credit

The purpose of this study is to provide insights into the neutronic similarities that may exist between a
generic cask containing typical spent nuclear fuel assemblies and commercial reactor critical (CRC) state-
points. Forty CRC state-points from five pressurized-water reactors were selected for the study and the
type of CRC state-points that may be applicable for validation of burnup credit criticality safety
calculations for spent fuel transport/storage/disposal systems are identified. The study employed cross-

Spent Nuclear Fuel: Accumulating Quantities at Commercial Reactors Present Storage and Other Challenges

The amount of spent fuel stored on-site at commercial nuclear reactors will continue to accumulate—increasing by about 2,000 metric tons per year and likely more than doubling to about 140,000 metric tons—before it can be moved off-site, because storage or disposal facilities may take decades to develop. In examining centralized storage or permanent disposal options, GAO found that new facilities may take from 15 to 40 years before they are ready to begin accepting spent fuel. Once an off-site facility is available, it will take several more decades to ship spent fuel to that facility.

User Manual for the Total System Model Version 6.0

The Civilian Radioactive Waste Management System (CRWMS) Total System Model (TSM), a
Level 3 software, is a planning tool that estimates the logistic and cost impacts of various
operational assumptions in accepting radioactive wastes. Waste forms currently tracked are
commercial spent nuclear fuel (CSNF), Department of Energy (DOE) spent nuclear fuel (DOE
SNF), Naval SNF, and high-level (radioactive) waste (HLW). The TSM simulates the actions for
Waste Acceptance (WA) from discharge to emplacement.

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