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MONTHLY ACTIVITIES.

FEBRUARY

(22/02/1229/02/12)

Briefing about practical training at Malaysian

Nuclear Agency by En. Mohamad Afiz B. Ab.

Rahman from Human Resource Department. Being introduced to the supervisor, En. Ahmad

Bazlie b Abdul Kadir.

Briefing about ANM organization, SSDL, functions

of laboratories under SSDL and about the personal

dosimeter.

Visited to Bunker 3, Block 19

MARCH

(1/03/1231/03/12)

Introduction of OSL

Briefing about the microStar software and how to

use the reader of LANDAUER.

Being explained by supervisor about the gamma

radiation machine operation and how to handle with

it, safety precautions when working with radiation.

Calibration of OSL by using Co-60 at Bunker 32 for

High Dose Rate

Calibration of OSL using Co-60 at Bunker 19 for

Low Dose Rate.

Taking a reading using LANDAUER reader.

Making a graph from the data collected.

Learn how to calculate time needed for OSL to being

exposed.

Learn the Cleaning Process of film badge.

Helping other staffs input data for Receiving and

Sending TLD into SSDL system.


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APRIL

(01/04/1230/04/12)

Anneal the OSL before using in calibration process.

Doing experiment exposure of OSL to N-80 source.

Take a reading for OSL using LANDAUER reader.

Making a graph using data collected.

Learn with supervisor about TLD badge and film

badge.

Supervisor gives briefing about the different

between TLD, film and OSL.

Learn how to used TLD reader Harshaw 4500 and

WinREMS.

Helping PhD student read the TLD card using

Harshaw 4500 reader.

Learn how to do calibration of TLD card with other

staff.

Learn about the calibration of ceric-cerous

dosimeter.

Going to UKM for doing the calibration of Ceric-

Cerous Dosimeter.

MAY

(01/05/1231/05/12)

Anneal the OSL as usually as before using in

calibration process.

Doing experiment exposure of OSL to N-200 source.

Doing experiment exposure of OSL to Cs-137

source.

Take a reading for OSL using LANDAUER reader.

Making a graph using data collected.

Analyze raw data for OSL.

Helping other staff read the TLD Chip.

Helping other staff record the TLD users of raw data

files.

Helping other staff registered receiving TLD from


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the users into e-SSDL system.

Prepared for chip area.

Learn how to calibrate TLD card using OB-85 by

Cs-137 source.

Learn how to expose TLD card using Eldorado

machine Co-60.

Starting making a report

JUNE

(01/06/1230/06/12)

Going to UKM for the calibration of Optichromic

Dosimetry (FWT 70-83 M) irradiation for tropical

fruits.

Universitys supervisor makes a visit during this

practical training.

Attend the Seminar of InLight Automatic Annealer

Operation At Malaysian Nuclear Agency.

Update the data and graph.

Searching additional information about the project.

Completed the report.

Taking some pictures around Block 32 and Block 19

related to the project title.


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WORKING INSTRUCTION OF READING OSL

1. Turn on the laptop and LANDAUER OSLs reader.

2. Input login: administrator and password: admin.

3. Click microStar software at the desktop.

4. Input login: admin and password: admin and click OK.


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5. The massage box as shown as figure below will appear at the display and clickYES.

6. Before starting reading OSL, make sure there is no dummy OSL in the dot carrier.

7. Choose reading tab at the display of microStar software.


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8. Then, choose Process # tab. Fill the date of reading OSL.

9. Then insert OSL card into Inlight Loader.

10. Turn Position Dial into clockwise from:

11. The reading will be appeared at display screen.

12. Turn into counter clockwise from E4 to H/P.

13. Take out OSL card from Inlight Holder.

14. Close Inlight Holder before take the next reading.

15. After finished read all of OSL card, choose Import/Export tab.

H/P(HOME

POSITION)

E1(DEEP

DOSE)

E2(SHALLOW

DOSE)

E3(LENS

DOSE)

E4(BETA

DOSE)


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16. Then choose Process Name tab. Choose the date that has been set at the first reading of

OSL.

17. ClickField Configuration tabs.


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WORKING INSTRUCTION FOR ANNEALING PROCESS OSL DOSIMETRY

1. Arrange OSL dosimetry on the OSLs magazine.

2. Arrange OSL sort by its serial number. (See Figure 1)

Figure 1

3. On board annealing OSL, make sure it is in clean from dirt and dust. If there is dirt, it

needs to be cleaned using tissue or vacuum. (See Figure2 & 3)

Figure 2


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Figure 3

4. Tap the left side of this OSL dosimeter. Gently pull the sheet that is in the OSL and OSL

dosimeter can be pulled out.

Figure 4

Figure 5


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5. Put back the OSL dosimetry in the magazine. Make sure the pieces are placed due to the

number at the OSLs magazine. (See Figure 6)

Figure 6

6. Repeat step 4 & 5 for the next OSL.

7. Put the annealing board that contained OSL in the annealer. Make sure the distance

between fluorescents lamp in the annealer is 6 cm.

Figure 7


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8. Setting digital clock at 2 hours.

Figure 8

9. Turn on the lamp and press the digital clock simultaneously. Let this annealing process

until finished 2 hours.

Figure 9

10. After 2 hours, turn off the annealer and digital clock.

11. Take out the annealing board from the annealer and pulled out the OSL sheet.

12. OSL sheet will be inserted back into the OSL dosimetry that available in the OSLs

magazine.

13. The dosimetry can be used to supply for the customers.


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Calibration of Optichromic Dosimeter (FWT-83) for Tropical Fruits

First, dose rate for Fricke have been determined. Then, dose rate for every hole have been

determined by the date of irradiation. The calibration conducted based on the range dosimeter for

example 10 20 kGy. If the range of dosimeter is wide, there must have two calibrations. The

lower dose is 100 1300 Gy. There have two graph bases on this calibration which are graph

calibration for the wavelength 605nm and graph calibration for the wavelength 656 nm. From the

graph, we can get the equation and developed the table. Then, unknown dose can be compared

with the table that generated before. After that, table for the wavelength 605 nm or 656 nm can

make as a reference to get the value. Percentage of the different between the unknown and the

real dose must be less than 10%. As a conclusion, table for the wavelength 605 nm must be used

for the calibration for dose 100-1300 Gy.

Figure 10: Dose mapping for calibration of Fricke.

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