The purpose of this evaluation is to provide a documented basis for demonstrating subcriticality
during shipment and Nevada Test Site (NTS) handling of the device for the Imaginary Event.
The device for the Imaginary Event is shown on drawings 18Y-123456 and 18Y-123457. These
drawings also contain mass and dimension information sufficient to readily demonstrate that the
device poses no unusual criticality concerns and in fact will remain subcritical even in the presence
of water internal to and surrounding the device.
For shipment of the pit for this device, the AL-R81 packaging is planned.
3.0 REQUIREMENTS DOCUMENTATION
There are no requirements that are unique to this evaluation; however, shipment of the device for
the Imaginary Event will be in compliance with the Fissile Class I requirements of 10 CFR Part
Evaluation of this device will be done by comparison with a previously evaluated and approved
5.0 CONTINGENCY ANALYSIS
Assembly and handling of components and the complete device at the NTS do not pose any
unusual criticality concerns. Stated differently, no upset conditions or abnormal environments can
be foreseen whereby criticality is a credible event.