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

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===Calibration OSLs===
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{| border="2" style="text-align:center;" |cellpadding="20" cellspacing="0
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OSL # || Listed Dose (mRad) || Measured Dose (mRad) || Average Dose (mRad)
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DN08276339J || Unexposed || 71.19332 || \
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DN08276683L Unexposed 70.39211 72.10899
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DN08258554P Unexposed 74.74154 /
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DN10806640H 500 687.3246 \
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DN10608908Z 500 681.0294 683.2422333
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DN10806620J 500 681.3727 /
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DN105057582 3000 3563.558 \
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DN104085766 3000 3522.352 3567.258333
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DN10608909X 3000 3615.865 /
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DN108066085 50000 55966.55 \
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DN103091798 50000 55420.36 55622.12
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DN104086665 50000 55479.45 /
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DN10606601L 100000 111610.5 \
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DN106066095 100000 114271.2 114191.3333
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DN10712163M 100000 116692.3 /
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QC OSLs Averages
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OSL # Listed Dose (mRad) Measured Dose (mRad) Average Dose (mRad)
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DN08264870R Unexposed 69.36198 \
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DN082701640 Unexposed 77.25963 74.74153667
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DN08269802P Unexposed 77.603 /
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DN10712168C 1000 1235.238 \
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DN10309170Q 1000 1223.106 1226.119667
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DN102095379 1000 1220.015 /
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Total dose calculated by <math>\int\limits_{t_0}^{t_f}\dot R\ dt </math>
 
Total dose calculated by <math>\int\limits_{t_0}^{t_f}\dot R\ dt </math>

Revision as of 00:39, 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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