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i <br />Radiation Protection <br /> Standard Operating Procedure i <br /> TITLES Alpha Contamination Surveys j <br /> <br />:. y::~er i <br /> <br />i <br /> wipe an area of about 4 inches square ( 100cm2). ~ <br /> 4.13.6 Position the "wipe" very close (1/8" to 1/~" maxim am) 1 <br /> to the alpha probe. <br /> 4.13.7 Allow the meter reading to stabilize, then note and <br /> record the reading. ~ <br /> i <br />4.13.8 Subtract the wipe test reading (Step-4.13.7) from the <br /> direct reading (Step-4.13.31 then record the result <br /> as "fixed" contamination. <br /> 4.13.8.1 Judgement should be used in assessing <br /> "fixed" contamination. Ore dust, as an <br /> example, will not readily adhere to most <br /> papers. If ore.dust is visable, <br /> therefore, a direct reading may be taken <br /> and assumed to be removable, until such <br /> time that the area can be cleaned and <br />i <br /> resurveyed. ' <br />4.14 After completing the survey, calculate the net dnm/I00 cm2 <br /> as shown in Attachment - 1• <br />4.15 Record the results of step 4.14 on the Radiation Survey <br /> Form shown in Attachment - 1• <br />4.16 The following general rules should be followed when <br /> performing alpha contamination surveyss <br /> 4.16.1 Always record the exact numerical result, Never <br /> <br />' <br />.,c~~i ::,.~ <br />:ate Issued <br />Prepared By I i <br />Page I <br />„_ i <br />{ ` <br />