Screening Analysis of Criticality Features, Events, and Processes for License Application
| Attachment | Size |
|---|---|
| Crit FEPs R0.pdf (2.73 MB) | 2.73 MB |
| Crit FEPs R1.pdf (2.35 MB) | 2.35 MB |
This analysis documents the screening analysis for postclosure criticality features, events, and
processes (FEPs). It addresses the probability of criticality events resulting from degradation
processes as well as disruptive events (i.e., seismic, igneous, and rockfall). Probability
evaluations are performed utilizing the configuration generator model described in Configuration
Generator Model for In-Package Criticality1, a component of the methodology from Disposal
Criticality Analysis Methodology Topical Report2. The total probability of criticality is compared against regulatory probability criterion established in 10 CFR 63.114(d)3 (less than one chance in 10,000 of occurring over 10,000 years). The total probability of criticality accounts for the evaluation of all potential critical configurations of all waste form and waste package combinations, both internal and external to the waste packages and for both steady-state and transient conditions. Initially, Screening Analysis of Criticality Features, Events, and Processes for License Application was intended as a demonstration of the screening methodology and would utilize information for the 21-PWR with Absorber Plates Waste Package type only. However, in addition to the 21-PWR with Absorber Plates Waste Package, information is available to perform the screening analyses for the 12-PWR Long, 44-BWR, and 24-BWR waste package types. Where defensible, assumptions have been made for the evaluation of the 21-PWR with Control Rods and DOE SNF waste package types in order to perform a compete criticality screening analysis. The inputs used to establish probabilities for this analysis report are based on information and data for the Total System Performance Assessment for the License Application (TSPA-LA), where available. Information and data for the Total System Performance Assessment for the Site Recommendation (TSPA-SR) are used where the TSPA-LA data are not available.
