“Due diligence is what we promote, risk management is what we support” Document Name: Document Type: Control Number: Measure: File Code: Last Update: Contamination Monitoring Sheet Form UEHS_FM Doc UEHS-L-001 September 2011 CONTAMINATION MONITORING Instrument Make/Model Detector Type Detector Area Click here to enter text. Click here to enter text. Click here to enter text. Efficiency for radionuclide Click here to enter text. Last Calibration Date Click here to enter text. MDA (Bq/cm2) Click here to enter text. All values obtained by using the following equations Instrument's Minimum Detectable Activity: LLD (cpm) 3 4.65 Background Counts Counting Time Counting Time Add 10% wipe removal efficiency and use 100 cm2 instead of Detector Area MDA(Bq/cm 2 ) LLD (cpm) Detector Efficiency Detector Area 60 s When NET Counts (Surface - Background) are GREATER than LLD: A(Bq/cm 2 ) Net Counts (cpm) Detector Efficiency Detector Area 60 s 350 Victoria Street, JOR-1122, Toronto, Ontario, M5B 2K3 Tel: 416-979-5000 x 7096 Fax: 416-979-5205 Email: [email protected] Web: www.ryerson.ca/irm Add 10% wipe removal efficiency and use 100 cm2 instead of Detector Area UN(Bq/cm 2 ) (Counts Counting Time) (Backgroun d Counts Counting Time) (Counting Time) 2 (Counting Time) 2 (Detector Efficiency Detector Area 60s) Counting Time is taken as 1 minute 1- For Direct Monitoring (no wiping): 0.3 Bq/cm2 contamination limit is equivalent to: Click here to enter text.CPM above Background 2- For Indirect Monitoring (counting a wipe): 0.3 Bq/cm2 contamination limit is equivalent to: Click here to enter text.CPM above background wipe Monitoring Results (CPM) Wipe (Y/N) Background Surface Monitoring Location (see map) Contamination Status1,2 (Clean/Contaminated) Date (mm/dd/yy) Performed by Page 2 of 4 Monitoring Results (CPM) Wipe (Y/N) Background Surface Monitoring Location (see map) Contamination Status1,2 (Clean/Contaminated) Date (mm/dd/yy) Performed by Page 3 of 4 Monitoring Results (CPM) Wipe (Y/N) Background Surface Monitoring Location (see map) Contamination Status1,2 (Clean/Contaminated) Date (mm/dd/yy) Performed by Page 4 of 4
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