Update on Standard Problem, Data Base, and Uncertainties

摘要

The Three Mile Island (TMI)-2 accident provides the only data for a full-scale, integrated water reactor facility during a severe accident. The data from this accident has been, and is being, collected, reviewed, and cataloged. The data will be placed in structured data bases. To date, three data bases have been completed: Plant Configuration, Sequence of Events, and Initial and Boundary Conditions. The data pertinent to the TMI-2 Standard Problem have been reviewed and categorized by type and level of uncertainty. As a result of the review process, it has been determined that further refinement of the estimated boundary conditions High Pressure Injection/makeup and letdown flow will be required. A demonstration calculation for the first 174 min of the accident has been completed using the RELAP/SCDAP integrated code. This calculation is in general agreement with the data for the first 100 min of the accident and in significantly less agreement beyond 100 min. Refinement of the model's nodalization is expected to correct some of the inconsistencies. (ERA citation 12:009176)