TEP 189-1974

Electron Tube Radioactivity Calculations in Microcuries/Tube

TEP 189-1974 发布历史

INTRODUCTION Radioactive isotopes are@ on occasion@ intentionally added by manufacturers of electron tubes to improve tube performance. For this reason@ manufacturs may be required t o determine the total radioactivity in microcuries per tube (?c/tube) to comply with existing Federal regulations. It is usually impractical to measure the radioactivity with any degree of precision@ The radionuclide is often surrounded by electrodes@ spacers@ and an envelope such that the geometry considerationspreclude a realistic calibration of a measuring device; and the amount of radionuclide intentionally added in the tube is often so small that the amount of radiation is difficultto discern from the normal background radiation that exists in the atmosphere. Therefore@ the radioactivity for electron tubes shall be determined by a calculation technique in terms of the known radionuclides which have been intentionally added to the electron tube to either increase tube life or to improve the overall tube perforniance.

TEP 189-1974由ECIA - Electronic Components Industry Association 发布于 1974-01-01，并于 2004-11-17 实施。

TEP 189-1974的历代版本如下：

• 1974年01月01日 TEP 189-1974

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标准号

TEP 189-1974

发布日期

1974年01月01日

实施日期

2004年11月17日

废止日期

无

中国标准分类号

/

国际标准分类号

/

发布单位

ECIA - Electronic Components Industry Association

引用标准

14

适用范围

INTRODUCTION Radioactive isotopes are@ on occasion@ intentionally added by manufacturers of electron tubes to improve tube performance. For this reason@ manufacturs may be required t o determine the total radioactivity in microcuries per tube (?c/tube) to comply with existing Federal regulations. It is usually impractical to measure the radioactivity with any degree of precision@ The radionuclide is often surrounded by electrodes@ spacers@ and an envelope such that the geometry considerationspreclude a realistic calibration of a measuring device; and the amount of radionuclide intentionally added in the tube is often so small that the amount of radiation is difficultto discern from the normal background radiation that exists in the atmosphere. Therefore@ the radioactivity for electron tubes shall be determined by a calculation technique in terms of the known radionuclides which have been intentionally added to the electron tube to either increase tube life or to improve the overall tube perforniance.