以γ射線取代X射線薄板探傷可行性之探討

Investigation on the Availability of Replacing X-ray by γ-ray in Thin Plates

楊昌樺(CHANG-HUA YANG)

指導教授 ： 康淵

中原大學/工學院/機械工程學系/碩士(2023年)

https://doi.org/10.6840/cycu202301088

摘要

本研究目的在探討射線照相時，被檢物厚度未達19mm，以γ射線取代X射線，利用照相技術彌補靈敏度不足的方式。
本研究在流程上先完成參考文獻的實驗驗證，確認γ射線、X射線與AGFA D7、D4底片，在實務選用方式的差異。
在實驗過程中，均對五塊試片使用兩種射源及底片照射，仔細觀察底片上的鉛字、像值計與缺陷，實驗結果以X射線搭配AGFA D7底片照相結果為最佳。
被檢物厚度10mm至19mm可用γ射線搭配AGFA D4底片取代X射線，但小於10mm的被檢物依舊以X射線搭配AGFA D7底片照相結果為最佳﹔射線照相首要工作為輻射防護，輻射防護應以合理抑低為準則，以現場工作人員所接受的暴露量降到最低為優先要件。

關鍵字

γ射線 ； X射線

並列摘要

The purpose of this study is to investigate the method of using γ-rays instead of X-rays to make up for the lack of sensitivity when the thickness of the detected object is less than 19mm in radiography.
In this study, the experimental verification of the references was completed first in the process, and the differences in the practical selection methods of γ-ray, X-ray and AGFA D7 and D4 film were confirmed.
During the experiment, five test pieces were irradiated with two kinds of radiation sources and negative film, and the type, imager and defects on the negative film were carefully observed.
The thickness of the inspected object is 10mm to 19mm, and the X-ray can be replaced by γ-ray and AGFA D4 film, but the inspection object smaller than 10mm can still be photographed with X-ray and AGFA D7 film. Taking reasonable reduction as the criterion, the priority is to minimize the exposure accepted by the on-site staff.

並列關鍵字

gamma rays ； x-rays

參考文獻

[1]劉建忠、蘇毅、李建奇，｢ASME標準中小徑管射線照相質量控制｣，煉油與化工，第3期，pp. 31-32，2011。

[2]李安營、黃萬輝、王培新、周慧玲，｢底片黑度對射線照相靈敏度的影響｣，無損探傷NDT，第27卷第2期，pp. 39-40，2003。

[3]唐明智、顧誾如，論推廣γ射線照相檢驗技術的可行性，石油工程建設，第5期，pp. 29-32，1995。

[4]鄭銘文、紀隆盛，射線檢測法(中級)，財團法人台灣非破壞檢測協會，pp. 25-127，1993。

[5]The America Society of Mechanical Engineer,ASME Boiler & Pressure Vessel Code, An International Code,2017 Edition,Nondestructive Examination V, New York,10016 USA.