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# Irradiation Sample Transfer Line Snubbing Section Behavior - PowerPoint PPT Presentation

Irradiation Sample Transfer Line Snubbing Section Behavior. Greg Padilla and Keane Nishimoto. Introduction. Background The MIT reactor and Transfer Line Motivation Safety measure in case of Transfer Line failure Desired Findings Model to help design snubbing section. Procedure. Apparatus

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### Irradiation Sample Transfer Line Snubbing Section Behavior

• Background

• The MIT reactor and Transfer Line

• Motivation

• Safety measure in case of Transfer Line failure

• Desired Findings

• Model to help design snubbing section

• Apparatus

• Experimental Procedure

• Data Processing

Smooth

Section

W/ Bend

Transfer

line

Transfer

Cylinder

Snubbing Section

First Sensor

Second

Sensor

Pressure

Sensor

• Calibration of pressure sensor

• Drops at 4 heights for each of 3 different masses

• Data Recorded

• Calibration data

• Capsule velocity calculated

• Pressure calculations

• Data taken form container mass = 0.7kg

• Height = 42” inches

Trigger Trace from first sensor

Trace from second sensor

Trace from Pressure sensor

• Model of the falling capsule

• Transfer Line

• Snubbing Section

• MATLAB Simulation

• The capsule is a falling object

• Force due to gravity

• Force due to pressure

• Ideal Gas Law – PV=mRT

• Navier Stokes

• Used to determine the mass of air left

• ODE 23 solver

• State Variables

• Position and velocity of capsule

• Mass of air in snubbing section

• Velocity is independent of Mass

• Velocity is a Function of Height

• Velocity = 1.46*Height + 2.18

• Ave. Error of 16%

• Initial Conditions:

• Mass = 0.7kg

• Velocity = 4.0m/s

• Temperature = 298K

• Temp = 574K

• Velocity = 5.0m/s

• Snubbing Length =1.5m

• Max P=1.81kPa

• Snubbing Length =1.0m

• Max P=1.86kPa

• Temp = 574K

• Velocity = 5.0m/s

• Snubbing Length =1.3m

• Max P=1.83kPa