Determination of indoor dose rate due to external radiation exposure in Baghdad

مقدم أطروحة جامعية

Kitah, Fouzey Hasan

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم العلوم التطبيقية

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2004

الملخص الإنجليزي

Radiation level in a building is important for the assessment of population exposure because most individuals spend the majority of time indoors so that they could be exposed to radiation which is normally radionuclides (mainly 226Ra, 232Th, their decay products, and 40K) existing in walls, floors and ceilings.

On the other hand, the rest of population times are spend outdoors on roads or near buildings, which expose them to radiation from materials used for construction.

Upon these facts the study was started in the city of Baghdad.

Fifty readings at "1" meter above the ground in the centre of fifty selected locations (dwellings, school, offices,...

etc), were taken during the period between (March - July) / 2004.

Two portable survey meters were used for gamma radiation sources detection. 1.

Portable rate meter scintillation detector Ludlum2241-2 reading in µR.hr-1 . 2, BGS-4 gamma-ray scintillation counter (scintrix) thallium -activated sodium iodide detector read in cps. The average reading represented the Exposure dose rate in the Baghdad city (7.7 µR.

hr_I) and annual equivalent dose rate (0.68 mSv.

yr_1). The highest equivalent dose rate (1.3 mSv.

yr _1) found in the location No.

(37), belongs to house near the Iraqi Atomic Energy Agency in Tuwyatha.

The lowest equivalent dose rate (0.4 mSv.yr-1) was recorded in prefabricated school in Al-Shyhada area location No.

(49).

The average effective dose rates in the houses selected from fifty locations were ((0.34)) mS.

yr -1.And these results within limit as recommended by (UNSCEAR 1993).

التخصصات الرئيسية

الصحة العامة

الموضوعات

• العراق

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-305713