a new m&s tool to supplant decontamination testing: the ... · depm – slide 1 approved for...

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A New M&S Tool to Supplant Decontamination Testing:The Decontamination Efficacy Prediction Model (DEPM)

January 11th, 2007

2007 NDIA Chemical and Biological Information Systems Conference

Austin, Texas

Test Technology Division

West Desert Test Center,

U.S. Army Dugway Proving Ground

DEPM – Slide 2

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AuthorsLeonard N. Carter, PhD, WDTC Program Manager for Future

Combat Systems M&S, 435-831-5131 (DSN 789-5131), pete.carter@us.army.milM&S Branch, Test Technology Division,West Desert Test Center (WD-TT-S)U.S. Army Dugway Proving GroundDugway, Utah 84022-5000

Ted Hayes, Senior Software Engineer,937-476-2181, ted.hayes@gdit.comGeneral Dynamics Information Technology5100 Springfield St, Suite 504Dayton, Ohio 45431-1261

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Briefing Outline

History/BackgroundModel Structure

Key Object ClassesKey Objects

Agent Flow DiagramsContamination & Aging PhaseDecon PhaseResidual Hazard Phase

Questions?

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History/Background

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Historical Background

Initiated in 2003 as the Equipment Contamination Initiated in 2003 as the Equipment Contamination Survivability Tool (ECS), funded by the VPG ProgramSurvivability Tool (ECS), funded by the VPG ProgramInitial phase was survey of existing models and databasesInitial phase was survey of existing models and databasesIn 2005 Anteon Corp. was selected to begin model designIn 2005 Anteon Corp. was selected to begin model designProofProof--ofof--principle prototype principle prototype demodemo’’eded in Sep. 2005 at DPGin Sep. 2005 at DPGWith VPG termination in 2006, project is now funded by With VPG termination in 2006, project is now funded by DTRA, with ECBC performing live agent testingDTRA, with ECBC performing live agent testingModeling effort now focused on simulating coupon testing Modeling effort now focused on simulating coupon testing of various materials in a chamber environmentof various materials in a chamber environmentModel renamed to Model renamed to DeconDecon Efficacy Prediction Model to Efficacy Prediction Model to reflect new focus; Anteon now part of GDITreflect new focus; Anteon now part of GDIT

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What is the Decontamination Efficacy Prediction Model (DEPM)?

The DEPM is a software tool that will simulate The DEPM is a software tool that will simulate the contamination/aging/decontamination of the contamination/aging/decontamination of material itemsmaterial itemsUsable model prototype to be ready early 2007Usable model prototype to be ready early 2007Provides a Provides a ““Virtual ChamberVirtual Chamber”” to subject to subject simulated items to the four key phases:simulated items to the four key phases:

ContaminationContaminationAgingAgingDecontaminationDecontaminationResidual HazardResidual Hazard

DEPM – Slide 7

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Potential Benefits of the DEPM

Not meant to replace all laboratory tests – will complementAllows paring down of live testing case matricesAllows a wider spectrum of contamination and environmental conditions to be exploredProvides a platform to test complex items or collections of items – testing not generally possible in chambers with live agent

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Model Structure

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DEPM Model Structure

DEPM Control Interface

Core Simulation Executive

Simulation Support Tools

Output Analysis

Tools

InputDatabaseEditors

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Key Object Classes (Generalized)

Agent

Stores

Agent

Sinks

Surface

Boundaries

Intermingled

Volumes

Transfer Events

Mass Transfer

Phase Transition

Reaction Process

Nodes

Boundaries

Transfer Processes

Decontaminant

Store

DEPM – Slide 11

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Stores and Sinks Object Classes

Agent

Stores

Agent

Sinks

Nodes

Decontaminant

Store

• Objects of these classes “contain” quantity of agent or decontaminant

• Mass can transfer into or out of Stores

• Mass can only transfer into Sinks

• A store is assumed to be of homogenous material

• Key Object Attributes:

Current Mass (units:mass)

Rate of Change (units:mass/unit time)

DEPM – Slide 12

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Transfer Event Object Classes

• Transfer Events Objects are used to represent the transfer of agent mass into or out of a store/sink that is assumed to occur at a discrete point in time (rather then over a period of time)

• Key Object Attributes:

Varies by Specific Object

Typically: mass, percent/fraction transferred, etc.

Transfer Events

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Boundary Object Classes• Boundary Objects

represent the “boundary” between agent stores/sinks

• These objects work with Transfer Process Objects to represent the flow of agent from store to store/sink

• “Intermingled Volumes” are used to represent the boundary between agent/ decontaminant stores that occupy the same “space” – typically used with reaction processes

• Key Surface Object Attributes:

Surface Area (units: area)• Key Volume Object Attributes:

Volume (units: volume)

Surface

Boundaries

Intermingled

Volumes

Boundaries

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Transfer Object Classes

• Transfer Objects work with Boundary Objects to represent the transfer/ transformation of agent mass between stores and sinks Mass

TransferPhase

TransitionReaction

Processes

Transfer Processes

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Agent Flow Diagrams

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Agent Flow Diagrams

The following slides show the general flow of agent mass from store to store/sink via boundaries using various transfer processes

Agent

Decontaminant

Reaction Product

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Phases Represented in Simulation

Contamination & AgingDecontamination

Physical RemovalVapor – Vapor DeconSurface DeconSubstrate Penetration Decon

Residual HazardResidual EvaporationContact Hazard

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Agent Flow: Contamination & Aging Phase

Test Fixture VaporAgent Store

Drop Placement Transfer Event

Reaction ProductAgent Sink

Surface AdsorbedAgent Store

Liquid – Vapor BoundarySurface Evaporation

Phase Transition Process

Liquid – Substrate BoundarySubstrate Absorption/

Diffusion Transfer Process

Substrate AbsorbedAgent Store

Agent – Substrate Absorbed Volume

Substrate-Agent Reaction Process

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Agent Flow: Decontamination Phase (Physical Removal)

Surface AdsorbedAgent Store

Decon Wipe Transfer Event

Evaporation

Substrate Absorption/Diffusion

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Agent Flow: Decontamination Phase (Vapor - Vapor Decon)

Reaction ProductAgent Sink

Evaporation

Surface AdsorbedAgent Store

Test Fixture VolumeDecon Vapor - Vapor

Agent Reaction Process

Vapor DeconStore

Test Fixture VaporAgent Store

DEPM – Slide 21

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Agent Flow: Decontamination Phase (Surface Decon)

Substrate Absorption/Diffusion

Reaction ProductAgent Sink

Reaction ProductAgent Sink

Evaporation

Surface AdsorbedAgent Store Surface Decon

Liquid Store

Liquid – Surface Agent VolumeDecon Liquid - Liquid

Agent Reaction Process

Vapor DeconStore

Liquid – Vapor BoundaryDecon Vapor - Liquid

Agent Reaction Process

DEPM – Slide 22

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Agent Flow: Decontamination Phase (Substrate Penetration Decon)

Reaction ProductAgent Sink

Surface AdsorbedAgent Store

Surface DeconLiquid Store

Liquid – Substrate BoundaryDecon Liquid – Substrate

Penetration/Absoption ProcessSubstrate Absorption/Diffusion

Substrate AbsorbedAgent Store

Absorbed Decon - Absorbed Agent Reaction Process

Absorbed DeconLiquid Store

DEPM – Slide 23

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Agent Flow: Residual Hazard Phase

Test Fixture VaporAgent Store

Surface AdsorbedAgent Store

Surface Contact BoundarySurface Contact Transfer

Process

Surface Liquid – Substrate Boundary

Surface Contact InducedSubstrate Diffusion Process

Substrate AbsorbedAgent Store

Contact HazardAgent Store

(dental dam)

Test Fixture VaporAgent Store

Evaporation

DEPM – Slide 24

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In Summary

ProofProof--ofof--Principle Prototype (as the ECS Model) Principle Prototype (as the ECS Model) has been completed and demonstrated at end of has been completed and demonstrated at end of FY05FY05Current development effort is projected to reach Current development effort is projected to reach limited decontamination efficacy prediction limited decontamination efficacy prediction capability by early CY07capability by early CY07Incorporation of more detailed and advanced Incorporation of more detailed and advanced functionality will continue in FY07 to allow for functionality will continue in FY07 to allow for more realistic simulations of live agent coupon more realistic simulations of live agent coupon contamination, aging, and decontamination, the contamination, aging, and decontamination, the level of effort commensurate with fundinglevel of effort commensurate with funding

DEPM – Slide 25Approved for public release; Distribution unlimited

Questions?