Difference between revisions of "Dose Calculations and 137Cs Shot Log"

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OSL # || Listed Dose (mRad) || Measured Dose (mRad) || Average Dose (mRad)
 
OSL # || Listed Dose (mRad) || Measured Dose (mRad) || Average Dose (mRad)
−
DN08276339J || Unexposed || 71.19332 || \
+
|DN08276339J || Unexposed || 71.19332 || \
 
|-
 
|-
−
DN08276683L || Unexposed || 70.39211 || 72.10899
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|DN08276683L || Unexposed || 70.39211 || 72.10899
 
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−
DN08258554P || Unexposed || 74.74154 || /
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|DN08258554P || Unexposed || 74.74154 || /
 
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−
DN10806640H || 500 || 687.3246 || \
+
|DN10806640H || 500 || 687.3246 || \
 
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DN10608908Z || 500 || 681.0294 || 683.2422333
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|DN10608908Z || 500 || 681.0294 || 683.2422333
 
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DN10806620J || 500 || 681.3727 || /
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|DN10806620J || 500 || 681.3727 || /
 
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DN105057582 || 3000 || 3563.558 || \
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|DN105057582 || 3000 || 3563.558 || \
 
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DN104085766 || 3000 || 3522.352 || 3567.258333
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|DN104085766 || 3000 || 3522.352 || 3567.258333
 
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DN10608909X || 3000 || 3615.865 || /
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|DN10608909X || 3000 || 3615.865 || /
 
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DN108066085 || 50000 || 55966.55 || \
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|DN108066085 || 50000 || 55966.55 || \
 
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DN103091798 || 50000 || 55420.36 || 55622.12
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|DN103091798 || 50000 || 55420.36 || 55622.12
 
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DN104086665 || 50000 || 55479.45 || /
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|DN104086665 || 50000 || 55479.45 || /
 
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DN10606601L || 100000 || 111610.5 || \
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|DN10606601L || 100000 || 111610.5 || \
 
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DN106066095 || 100000 || 114271.2 || 114191.3333
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|DN106066095 || 100000 || 114271.2 || 114191.3333
 
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DN10712163M || 100000 || 116692.3 || /
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|DN10712163M || 100000 || 116692.3 || /
 
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Revision as of 00:44, 14 October 2017

Source Calibration and Dose Rate Data

Date Initial Source Strength (Ci) Current Source Strength (Ci) Distance to Faceplate (cm) Exposure Rate (Roentgen/hr)°
6/27/17 20 9.3 30.5 17.691
9/11/17 20 9.3 30.5 17.606

°Calculated by TSO using [math]\dot R = \frac {\Gamma A }{ D^2} [/math] where [math]\boldsymbol{\Gamma} = 3.3 \frac {(cm^2)(R)}{(mCi)(hr)} = .35 \frac {(m^2)(R)}{(Ci)(hr)} [/math] , [math]\mathbf{A} = 9.3 Ci [/math] , [math]\mathbf{D}=(\text{Distance to faceplate} + 11.2cm) [/math]

There is an adjustment distance of 11.2cm which accounts for the distance from the faceplate to the [math] ^{137}Cs[/math] source

137Cs Shot Log

Dot OSLs

Date Run Number Run Time (s) Distance to Faceplate Number of OSLs in Stack Dose Rate (R/hr) Total Exposed Dose (R)
9/8/17 1 5660 30cm 11 18.7188 108536
9/8/17 1 5660 30cm 11 18.7188 108536
9/26/17 2 4500 30cm 11 18.7188 84234.8
9/26/17 2 4500 30cm 11 18.7188 84234.8

Total dose calculated by [math]\int\limits_{t_0}^{t_f}\dot R\ dt [/math]

In these calculations, [math]\Gamma = 0.35 \frac {(m^2)(R)}{(Ci)(hr)} [/math]

Nanodot OSL Quality Control

Date Run Number Run Time (s) Distance to Faceplate Number of OSLs Total Exposed Dose (R)
10/12/17 1 284.04 30.5cm 3 5242.02

Calibration OSLs

OSL # || Listed Dose (mRad) || Measured Dose (mRad) || Average Dose (mRad)
DN08276339J Unexposed 71.19332 \
DN08276683L Unexposed 70.39211 72.10899
DN08258554P Unexposed 74.74154 /
DN10806640H 500 687.3246 \
DN10608908Z 500 681.0294 683.2422333
DN10806620J 500 681.3727 /
DN105057582 3000 3563.558 \
DN104085766 3000 3522.352 3567.258333
DN10608909X 3000 3615.865 /
DN108066085 50000 55966.55 \
DN103091798 50000 55420.36 55622.12
DN104086665 50000 55479.45 /
DN10606601L 100000 111610.5 \
DN106066095 100000 114271.2 114191.3333
DN10712163M 100000 116692.3 /

QC OSLs Averages OSL # Listed Dose (mRad) Measured Dose (mRad) Average Dose (mRad) DN08264870R Unexposed 69.36198 \ DN082701640 Unexposed 77.25963 74.74153667 DN08269802P Unexposed 77.603 / DN10712168C 1000 1235.238 \ DN10309170Q 1000 1223.106 1226.119667 DN102095379 1000 1220.015 /



Total dose calculated by [math]\int\limits_{t_0}^{t_f}\dot R\ dt [/math]



Reproducibility with 137Cs

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