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Radiation Protection <br /> Standard Operating Procedure <br /> TITLES Alpha Contamination Surveys <br /> <br />i~::::ber <br /> values is plus or minus 25°~ or less. <br />4.11 Record the efficiency value to be used on the survey form. <br />4.12 The surveyor should record only the counts per minute observed <br /> while performing the survey, since it is not practical to <br /> perform calculations in the field. The surveyor should, <br /> however, calculate the counts per minute equivalent to the <br /> various action levels (1,000 dpm/100 cm2„ etc.), prior to <br /> performing the survey, in the manner shown in Attachment - 1. <br /> Thus, the surveyor knows at what count per minute level wipes ~ <br /> { <br />should be made at, or what areas require further surveying, <br /> without the necessity of field calculations. <br /> <br />4.13 i <br />Alpha surveys will be conducted in the following manners <br /> 4.13.1 Select the surface or piece of equipment to be <br /> surveyed. <br /> 4.13.2 Position the alpha probe very close (1/8" to 1/~" <br /> maximum) to the surface. <br />i <br /> 4.13.3 Maintain the probe position until the meter reading <br /> has stabilized, then note and record the reading. <br /> 4.13.4 If the result of Step-4.12.3 is equal to or greater <br /> than 1,000 dpm/100 cm2, go to Step-4.12.$. If the <br /> result is less than 1,000 dpm/100 cm2, record the <br /> result and proceed to the next survey location. <br /> <br />I 4.13.5 Using absorbent paper, and moderate finger pressure, <br />i <br />r <br />I <br />i <br />t <br />i <br /> <br />Cc~y i~c <br />Date Issued <br />Prepared By f <br />pa s° f <br /> ' _._. __ <br />