DDESB Calculator

Important: NATO Automated Safety Assessment Protocol - Explosives (ASAP-X (N)): This is an easy to use tool for determining expected consequences to surrounding personnel and structures resulting from an accident/reaction involving munitions, based on generic information found in AASTP-1. Users construct an evaluation scenario by defining the potential explosion site (PES) type, the net explosive quantity (NEQ) and Hazard Divisions (HDs) being stored within the PES, identify nearby exposed sites (ES) and their distance from the PES, ES occupancy, and ES replacement cost. The tool assesses the PES-ES scenario and provides a visual, color-coded representation of the consequences of an accident at the PES (i.e., fatalities and ES structural damage), in a format that's easy to understand by a decision maker who will be asked to accept the risk. The tool only evaluates one PES at a time, but multiple ES can be included in the scenario. For multiple PES, the tool will need to be re-run for each PES. An added feature is that the tool provides a means to make changes to NEQs and to move planned PES and/or ES locations to gage the impact of such changes in improving or worsening expected consequences.

CAUTION - It's important for users to understand that if multiple HD NEQ input fields are filled in at the same time, that the tool does not apply the AASTP-1 mixing and aggregation rules in its calculations. The user must understand the AASTP-1 mixing/aggregation rules and apply the output results from the tool appropriately.

Minimum knowledge required: Users must be familiar with/understand: the UN hazard classification system for classifying munitions (e.g., HD 1.1 through HD 1.6); AASTP-1's use/expansion of that system for storage purposes; mixing/aggregation rules for mixing different HD together in the same PES; and facilities structural strength designators as they will influences PES selection. Additional information on all these areas can be found in NATO AASTP-1, Edition 1, Change 3.

This spreadsheet is provided courtesy of the U.S. Department of Defense's Explosives Safety Board (DDESB).