General Counting Procedure
Contents
1. Nuclide Channel Energy Background Net area Cnts sec Uncert FWHM MN 54 830 47 834 81 2 0 002 428 76 3 277D CO 56 842 49 846 75 Ts 0 001 1382 38 3 286D AG 110M 880 65 884 67 1 0 0 000 0 00 0 000D SC 46 883 57 887 57 Ds Sia 0 005 167 60 1 747s AG 110M 93 5435 93 9 203 9 Dia 0 005 207 44 0 924s CO 56 1035 00 1038 07 he 0 0 000 0 00 0 000s FE 59 1096 54 1099 22 Bi 0 0 000 1309 14 3 466D ZN 65 1112 94 1115 52 Ds his 0 007 116 313 3 477D SC 46 1117 97 1120452 ZAR 0 0 000 0 00 3 481D CO 60 11 710 17323 2 0 0 000 0 00 0 928D TA 182 1185 36 1187 49 2 Dis 0 005 127 88 0 895s TA 182 1219 50 1221 42 8 2 0 002 389 00 3 548D CO 56 1236 46 1238 28 b 3 0 003 156 18 3 559 NA 22 1272 95 1274 54 3 4 0 004 174 74 35582D FE 59 1290 07 1291 56 4 0 0 000 1531 49 3 593D CO 60 1329 33 1330 58 Ls I 0 001 314 96 0 732s AG 110M 1381 50 1382 42 0 Sa 0 005 89 44 1 988s AG 110M 1503 00 1503 18 0 0 0 000 0 00 0 000s SB 124 1692 02 1691 04 0 0 0 000 0 00 0 000s CO 56 1771 00 1769 54 0 0 0 000 0 00 0 000s s Peak fails shape tests D Peak area deconvoluted ENTRAR SUMMAR Y O F L BRARY AK USAGE RTS Nuclid Averag Peak Name Code Activity Energy Activity Code MDA Value microCi kev microCi microCi Comments BE 7 0 0000E 00 477 56 0 000E 00 941E 04 G NA 22 0 0000E 00 1274 54 0 000E 00 117E 05 G SC 46 0 0000E 00 1120 52 0 000E 00 7385 05 G 889 26 0 000E 00 929E 05 G CR 51 0 0000E 00 320 07 0 000E 00 641E 04 G MN 54 0 0000E 00 8342. Sample Analysis Checklist SAC See General Sample Analysis procedures in the Rad Lab Manual 2 Open GammaVision software assure there is no job in process see side bar if counting you will see updating of Real amp Live time Note If the Gammavision software cannot be found on the desktop or the start menu shortcuts to the programs and the macros can be found on the V drive under the following path VAESHOHPIDREPIRAD LAB HPGe Gammavision Shortcuts 3 If a QA check is not required see Step 7 of SAC proceed to Step 13 of this procedure Otherwise retrieve the H20 equivalent epoxy calibration standard with an assay date of 5 04 Daily QA Check 4 From the drop down menu on the main page select the detector you wish to run the Daily QA check 5 Use top menu bar to select Services and Job Control In the User folder select DailyQACheck amp Open 6 Enter your operator name e g HBROGONIA Click OK F a 7 Make sure the shielding cave is empty and click OK to run the contamination check The system will count for a preset time of 60 seconds Wait until further instructions 8 When prompted place the epoxy standard S N 1046 67 1 in the counter centered on the blue dot amp latch the shielding closed Click OK This starts the 30 minute 1800 second spectrum accumulation count Gammavision will notify
3. 23 Use top menu bar to select Calibrate amp Recall Calibration In the User folder select the most recent calibration for the type of sample counted amp then Open Likewise select the appropriate library file under Library and Select File To change any other settings consult the Rad Lab Administrator or the Gammavision Manual 24 Use top menu bar to select Analyze amp Peak Search If there is no error message continue with Step 26 25 If an error message appears that no peaks are identified click OK 26 Select Analyze amp Entire spectrum in memory then return to Step 22 27 Use the arrows at Peak on the sidebar move to the various peaks of the spectrum amp check the identified peaks against the library match Check the displayed spectrum and report If any nuclides are reported above the MDA verify the results by checking to see if key and secondary gammas appear the peaks have a low uncertainty or overlap with any naturally occurring nuclides Some cases may require a background subtraction or geometry correction Note The report shall be reviewed by the REP DREP or FO manager prior to releasing the results If the results are as expected proceed to step 29 28 If the results are unexpected e g radioactivity detected in a location or well where it was not expected or none where it was expected alert the REP DREP or FO mgr immed
4. 04 G 1189 05 0 000E 00 1 806E 04 G Cs 137 0 0000E 00 661 66 0 000E 00 3 354E 05 G This peak used in the nuclide activity average Peak is too wide but only one peak in library Peak is part of a multiplet and this area went negative during deconvolution Peak is too narrow Peak is too wide at FW25M but ok at FWHM Peak fails sensitivity test Peak identified but first peak of this nuclide failed one or more qualification tests Peak activity higher than counting uncertainty range Peak activity lower than counting uncertainty range Peak outside analysis energy range Calculated peak centroid is not close enough to the October 16 2006 SLAC I 760 2A39C 009 R 002 Page 18 Gamma Spectroscopy Analysis Procedure S ORTEC g v i 63 wan32 tanford Linear Accelerator Ce library energy centroid for posi P Peakbackground subtraction Nuclide Codes G53W2 06 Spectrum name tive 21 APR 2005 11 42 55 Page 5 BKGH20Tap Anl identification Peak Codes T Thermal Neutron Activation G Gamma Ray F Fast Neutron Activation X X Ray I Fission Product P Positron Decay N Naturally Occurring Isotope S Single Escape P Photon Reaction D Double Escape C Charged Particle Reaction K Key Line M No MDA Calculation A Not in Average R Coincidence Corrected C Coincidence Peak H Half
5. 81 0 000E 00 666E 05 G FE 59 0 0000E 00 1099 22 0 000E 00 265E 05 G 1291 56 0 000E 00 5 501E 05 G CO 56 0 0000E 00 846 75 0 000E 00 2 975E 05 G 1238 28 0 000E 00 3 572E 05 G 1771 49 0 000E 00 9 520E 05 G 1037 83 0 000E 00 8 664E 05 G ORTEC g v i 63 wan32 G53W2 06 21 APR 2005 11 42 55 Page 4 Stanford Linear Accelerator Ce Spectrum name BKGH20Tap Anl October 16 2006 SLAC I 760 2A39C 009 R 002 Page 17 Gamma Spectroscopy Analysis Procedure Nuclide Ave activity Energy Activity Code Peak MDA Comments CO 57 0 0000E 00 122 07 0 000E 00 1 812E 05 G 136 43 0 000E 00 976E 04 G co 58 0 0000E 00 810 75 0 000E 00 753E 05 G co 60 0 0000E 00 1332 51 0 000E 00 1 717E 05 G 1173 23 0 000E 00 576E 05 G ZN 65 0 0000E 00 1115 52 0 000E 00 7 307E 05 G AG 110M 0 0000E 00 657 75 0 000E 00 3 005E 05 G 884 67 0 000E 00 1 388E 05 G 937 48 0 000E 00 1 045E 04 G 1384 27 1 557E 04 amp 1 145E 04 G 763 93 0 000E 00 9 781E 05 G 706 67 0 000E 00 1 964E 04 G 1505 00 0 000E 00 1 010E 04 G 677 61 0 000E 00 2 708E 04 G SB 124 0 0000E 00 602 71 0 000E 00 1 939E 05 G 1691 04 0 000E 00 2 885E 05 G 722 78 4 964E 04 3 216E 04 G SB 125 0 0000E 00 427 95 0 000E 00 1 101E 04 G 600 77 0 000E 00 1 459E 04 G 636 15 0 000E 00 2 741E 04 G 463 51 0 000E 00 3 377E 04 G TA 182 0 0000E 00 67 75 0 000E 00 5 325E 05 G 1221 42 0 000E 00 1 320E
6. 2 886 AM 241 1459 77 1460 21 Ds 38 0 038 37 27 3 334 K 40 M s Peak fails shape tests D Peak area deconvoluted M Peak is close to a library peak KKKKKKKKKKKKKK I D E N T I F T E D P E A K S U M M A R Ye KKEKKKKKKKKKKKK Nuclide Peak Centroid Background Net Area Intensity Uncert FWHM Channel Energy Counts Counts Cts Sec 2 Sigma keV TA 182 58 56 67 74 104 0 0 000 0 00 2 621 CO 57 113 00 121 84 22 0 0 000 0 00 0 000s CO 57 128 00 136 74 3 6 0 0 000 0 00 0 000s CR 51 311 00 318 59 0 0 0 000 0 00 0 398s SB 125 423 00 429 88 23 Oe 0 009 164 80 0 000s SB 125 456 84 463 51 26 Dis 0 005 289 76 2 979D BE 7 470 98 477 56 18 6 0 006 217 07 2 991D SB 125 595 08 600 88 14 0 0 000 0 00 35093 sB 124 592 00 597583 5 2 0 002 264 11 0 845s SB 125 632 21 637 78 13 4 0 004 230 97 1 104s AG 110M 650 55 656 00 9 Dis 0 005 187 16 0 927s Cs 137 656 24 661 66 14 0 0 000 0 00 3 142 AG 110M 672 29 677 61 14 O 0 000 0 00 3155 AG 110M 701 53 706 67 95 8 0 008 121 43 3 178D SB 124 717 74 722 78 10 12 0 012 95 13 3 190D AG 110M 759 15 763 93 Si 0 0 000 0 00 0 000s October 16 2006 SLAC I 760 2A39C 009 R 002 Page 16 Gamma Spectroscopy Analysis Procedure CO 58 ORT 807 07 EC gv i Stanford Linear Accelerator Ce 811 56 63 wan32 G53W2 06 Spectrum name 2 0 002 305 SI 21 APR 2005 11 42 55 Page BKGH20Tap Anl 0 812s
7. 5 535106 0 077074 0 005428 Library Files Main analysis library SLACstd lib Library Match Width 0 500 Analysis parameters Analysis engine wan32 G53W2 06 Start channel 40 49 30keV Stop channel 2000 1997 14keV Peak rejection level 50 000 Peak search sensitivity 4 Sample Size 1 0000E 00 Activity scaling factor 1 0000E 00 1 0000 1 0000E 00 Detection limit method Currie limit Random error 1 0000000E 00 E 00 1 0000E 00 October 16 2006 SLAC I 760 2A39C 009 R 002 Page 15 Gamma Spectroscopy Analysis Procedure Systematic error 1 0000000E 00 Fraction Limit 0 000 Background width average of five points Half lives decay limit 12 000 ORTEC g v i 63 wan32 G53W2 06 21 APR 2005 11 42 55 Page 2 Stanford Linear Accelerator Ce Spectrum name BKGH20Tap Anl Activity range factor 2 000 Min step backg energy 0 000 Corrections Status Comments Decay correct to date NO Decay during acquisition NO Decay during collection NO True coincidence correction NO Peaked background correction NO Absorption Internal NO Geometry correction NO Random summing NO Energy Calibration Normalized diff 1 0000 KaKKKKKKKKKKK U N nk D E N T I F I E D P E A K S TI M M A R Y KKKKKKKKKKKK Peak Centroid Background Net Area Intensity Uncert FWHM Suspected Channel Energy Counts Counts Cts Sec 2 Sigma keV Nuclide 54 74 63 94 90 34 0 034 84 22
8. ROUTING SHEET GAMMA SPECTROSCOPY ANALYSIS PROCEDURE Document Title LAC I 760 2A39C 009 Revision ctober 16 2006 Document Author Henry Brogonia The following action s is are requested to the attached document Review and approve this completely new document X Review and approve changes to this revised document Delete this document Revise or update this document Each reviewer will have 10 working day s to complete this task The reviewer shall return this attached document with comments to the original requestor author or to the next available reviewer The last reviewer return to requestor author at Name Henry Brogonia Mail stop 84 rr aa YES REVIEWER NAME GROUP Received Completed Jim Allan Field Operations Nas tole DA James Liu DREP Group Leader e as 4 ES amp H DIVISION RADIATION PROTECTION RP DEPT SLAC I 760 2A39C 009 R 002 GAMMA SPECTROSCOPY ANALYSIS PROCEDURE RP Dept Document RE 010 Stanford Linear Accelerator Center October 16 2006 SLAC I 760 2A39C 009 R 002 Page 1 SIGNATURE LIST Document Author Henry Brogonia Owner Group REP Adoption of new or X revised document or document deletion reviewed and approved by Owner Group Leader A E Py Jl 6 06 James Liu Radiological Environmental Protection Group Date S Reviewed and approved by other reviewers hcre Murat Kerimbaev Radiological Environmental P
9. acros Each macro calls the appropriate calibrations and libraries for a particular sample type These macros will bring up several system settings that are appropriate for counting a particular sample These settings include the calibration count time library peak sensitivity sample volume decay correction background subtraction and geometry corrections A reference table Attachment 2 lists the settings for each type of sample being counted The analysis report Attachment 3 should be checked against the reference settings to ensure correct analysis data 5 3 Determine the Results When the analysis is complete a report will automatically be generated You may choose to print the report at this time The analysis results should be thoroughly scrutinized by a person experienced in gamma spectra analysis for e Settings for the sample being counted calibration library background subtraction etc match the reference table e Extreme departure from the expected result of the analysis e lsotopes that are not usually found at SLAC e Isotopes having half lives which should preclude their presence in the sample A sample may need to be re analyzed under several conditions to determine its radioactive constituents For instance a soil spectrum may need to be analyzed with a separate library to account for naturally occurring isotopes or background subtraction may be needed to refine the spectrum A sample may need to be counted longe
10. alEpoxy2006F Clb NimCalEpoxy2006F Clb NimCalSwipe Clb NimCalSwipe Clb Comments Use natchain library to find naturally occuring nuclides Use natchain library to find naturally occuring nuclides Use natchain library to find naturally occuring nuclides If mostly solid use soil calibration Calibration to be Created 12 2006 Calibration to be Created 12 2006 Geometry corrections may be needed if volumes differ consult with REP manager for appropriate actions October 16 2006 SLAC I 760 2A39C 009 R 002 Page 14 Gamma Spectroscopy Analysis Procedure ORTEC g v Stanford Linear Accelerator Ce 7 3 Attachment 3 Sample Report i 63 wan32 Sample description Background file for Tap Water Spectrum Filename Acquisition information Start time Live time Real time Dead time G53W2 06 Spectrum name C User BKGH20Tap Anl 21 APR 2005 11 42 55 Page BKGH20Tap Anl 21 Apr 2005 11 26 13 i 1000 1000 O 20d 3 Detector ID Detector system MATC 122 Calibration Filename LBDO60404 N EW LIQ 10 HR DIR Energy Calibration Created Zero Gain offset Quadratic Efficiency Calibration 1 CALLBDO60404 Clb ECTLY ON DETECTOR 04 Jun 2004 07 55 53 9 550 kev 0 994 keV channel 6 117E 08 keV channel 2 E COMBO 0 494736 0 000133 Created 04 Jun 2004 09 27 20 Type Polynomial Uncertainty 4 076 Coefficients 0 303824
11. ard is then placed into the detector and counted for a preset time Upon completion of the macro the data is logged into the QA database of the system software The macro will verify that the regions of interest and their peaks correspond to the correct gamma energies and activities of the source standard listed on its certificate If there are any major discrepancies between the count and the source standard certificate the user will be notified before the next count The software will list satisfactory parameters as an o k in the QA status menu Major discrepancies will be noted as a violation under the same menu If the system fails any of the QA parameters the Gamma spectroscopy unit should be adjusted repaired as needed 5 2 Count the Sample There is no preparation for Gamma spectroscopy samples It should be noted that most samples should be counted in the same container geometry as the source standard used to calibrate the profile For typical counting 500 ml of sample should be used for liquid profiles and 250 ml should be used for soil profiles Samples should be placed in a 500 ml Nalgene bottle There may be October 16 2006 SLAC I 760 2A39C 009 R 002 Page 7 Gamma Spectroscopy Analysis Procedure a need for geometry corrections if the sample volumes change The sample is placed in the shielded volume and ready for counting Routine gamma energy analysis with the germanium detector is accomplished using a set of m
12. eca a ae cap oi Gl a a a a a a Do a a aa ai a d 7 5 3 Determine the Results mmue nenea nenea nea ame nea nana aaa aaa nana aaa aaa au 8 5 4 Sample DISPOSAL cnezi sida 8 6 RECORDS unica cs 9 7 AMACHMENTSIFORMS icictinids cti ace pa co Da ppt cc 9 7 1 Attachment 1 Routine Gamma Spec Counting Checklist mmm eee ana ana 10 7 2 Attachment 2 Reference Table for Gamma Spectroscopy samples men nn eenneee 14 7 3 Attachment 3 Sample Report ccccceesceceeeeeceeeeeeeseeeeeeeeceaeeeeaaeseneeseaeeesaaaeseeneeseaeeesaeeesaaeseeneesenees 15 October 16 2006 SLAC I 760 2A39C 009 R 002 Page 5 Gamma Spectroscopy Analysis Procedure 1 PURPOSE This procedure provides general guidance for characterizing samples using gamma spectroscopy This document applies to anyone characterizing samples in the Radioanalysis Laboratory Rad Lab This procedure outlines the necessary steps for gamma spectroscopy counting A Routine Gamma Spec Counting Checklist Attachment 1 is attached to provide detailed instructions for routine gamma spectroscopy counting using current Rad Lab equipment 2 REFERENCES 2 1 ORTEC GammaVision 32 Software User s Manual 2 2 ORTEC Solid State Photon Detector Operators Manual 2 3 SLAC Rad Lab Manual General Sample Analysis Procedure 3 RESPONSIBILITIES 3 1 Rad Lab Operator The Rad Lab Operator assigned to perform activities described in this chapter is responsible for e ensuring
13. iately 29 Print the report October 16 2006 SLAC I 760 2A39C 009 R 002 Page 12 Gamma Spectroscopy Analysis Procedure Done Step Item No 30 On the Radioactivity Analysis Form or separate sheet list any nuclides detected amp their activities In most cases positive GS results should be converted to pCi amp be listed on paperwork with units pCi GS 31 Remove the sample from the GS amp latch the shielding closed 32 Complete Steps 9 end of Sample Analysis Checklist October 16 2006 SLAC I 760 2A39C 009 R 002 Page 13 Gamma Spectroscopy Analysis Procedure Last Updated Water Oil Soil Sand Concrete Resin Slurry Swipe Filter Notes 11 13 2006 Ideal Volume Macro Liquid Liquid Soil Soil Soil Liquid Liquid Swipe Swipe 7 2 Attachment 2 Reference Table for Gamma Spectroscopy samples Count Time 1000 seconds 1000 seconds 1000 seconds 1000 seconds 1000 seconds 1000 seconds 1000 seconds 1000 seconds 1000 seconds Ideal Container 500 ml Nalgene 500 ml Nalgene 500 ml Nalgene 500 ml Nalgene 500 ml Nalgene 500 ml Nalgene 500 ml Nalgene N A N A Library Slacstd1 Slacstd1 Slacstd1 Slacstd1 Slacstd1 Slacstd1 Slacstd1 Slacstd1 Slacstd1 Calibration NimCalEpoxy2006F Clb NimCalEpoxy2006F Clb NimCalSoil2006B Clb NimCalSoil2006B Clb NimCalSoil2006B Clb NimC
14. lect the applicable macro amp Open The most commonly used 1000 sec macros are e LIQBOTTLE JOB 500 mL of a unit density liquid sample in 500 mL plastic bottle set directly on the detector Library file used SLACstd1 activated nuclides Calibration file used the current epoxy calibration No background subtraction or geometry correction e SANDBOTTLE JOB 250 mL 425 g soil in 500 mL plastic bottle set directly on the detector Library file used SLACstd1 activated nuclides Calibration file used current sand calibration No background subtraction or geometry correction Note that the ability of the s w to correctly determine the radionuclides present amp to accurately assess activities depends on a good match between the geometry assumed in the macro amp the actual analysis geometry In cases where results are critical especially for activity consult the REP mer if the sample doesn t match either of the listed macros 14 For Sample Description enter the sample ID from the sample label amp any other info you wish to add Click OK 15 Enter your operator name e g HBROGONIA Click OK 16 Verify that the sample bottle or other container is sealed closed If exterior of sample container could be contaminated wipe it with a disposable towel discard towel in rad waste bin If the sample is not contained in a sealed container put it in a plastic bag avoid contami
15. life limit exceeded PEE SUMMAR Y OF NUCLIODES I N SAMPLE IK RR Time of Count Uncertainty 2 Sigma Nuclide Activity Counting Total uCi BE 7 lt 2 9406E 04 NA 22 lt 3 1169E 05 SC 46 lt 3 7375E 05 CR 51 lt 1 6412E 04 MN 54 lt 2 6664E 05 FE 59 lt 3 2650E 05 CO 56 lt 2 9748E 05 CO 57 lt 1 8117E 05 CO 58 lt 1 7533E 05 CO 60 lt 1 7174E 05 ZN 65 lt 7 3066E 05 AG 110M lt 3 0053E 05 SB 124 lt 1 9389E 05 SB 125 lt 1 1013E 04 TA 182 lt 5 3248E 05 Cs 137 lt 3 3543E 05 lt MDA value printed A Activity printed but activity lt MDA B Activity lt MDA and failed test C Area lt Critical level F Failed fraction or key line test H Halflife limit exceeded SUMMARY Total Activity 49 3 to 1997 1 keV 0 0000000E 00 uCi Analyzed by Brogonia Reviewed by Supervisor Laboratory Stanford Linear Accelerator Center October 16 2006 SLAC I 760 2A39C 009 R 002 Page 19
16. nation of the GS system Place the sample in the counter centered on the blue dot amp latch the shielding closed 17 For Spectrum enter the same sample ID as in Step 14 Click OK 18 Click OK when the Sample Description is shown this starts the 1000 second spectrum accumulation count Determine the Results October 16 2006 SLAC I 760 2A39C 009 R 002 Page 11 Gamma Spectroscopy Analysis Procedure Done Step Item No 19 After the count there may be an error message if no peaks are identified If so click OK Click on File then Save to save the spectrum If there are no error messages proceed to Step 20 20 Check the dead time recorded for the count it should be less than 10 If not notify the REP program mer 21 Generally the s w will automatically display a report Verify that the report lists the most recent calibration appropriate for the sample amp the appropriate library usually SLACstd as well as any other counting parameters Check the report to verify that the system parameters match the settings as listed in the reference table in the Rad Lab System Info binder 22 If the report lists the correct system settings proceed to Step 27 Otherwise close the window On top menu bar select File Recall amp type in the sample ID Select the file with the SPC extension
17. r for better statistics Caution Rerunning a macro can cause the original measurement files to be overwritten Under no circumstances may results be released as official unless they are reviewed by a qualified member of the Radiological Environmental Protection Group 5 4 Sample Disposal Upon completion of analysis the sample container and release documentation are returned to the customer A copy of the documentation is filed in the Rad Lab archives If the sample has been released to the Rad October 16 2006 SLAC I 760 2A39C 009 R 002 Page 8 Gamma Spectroscopy Analysis Procedure Lab then the Hazardous Waste group and or the Radioactive Waste group should be contacted to determine the appropriate disposal method 6 RECORDS 6 1 All analysis results generated from this procedure must be entered into the REP Rad Lab database on the network drive to ensure data access security control and backup 6 2 All hardcopies of the Analysis reports generated from this procedure should also be provided and stored in the Rad Lab archives 7 ATTACHMENTS FORMS 7 1 Attachment 1 Routine Gamma Spec Counting Checklist 7 2 Attachment 2 Reference Table for Gamma Spectroscopy samples 7 3 Attachment 3 Sample Report October 16 2006 SLAC I 760 2A39C 009 R 002 Page 9 Gamma Spectroscopy Analysis Procedure 7 1 Attachment 1 Routine Gamma Spec Counting Checklist Done Step Item No 1 Complete Steps 1 7 of
18. rotection Group Date Date October 16 2006 SLAC I 760 2A39C 009 R 002 Page 2 DISTRIBUTION LIST To be filled out by Document Author or person requesting document deletion Once approved the new or revised document or the notice of deleted document s should be distributed to all persons identified below All RP staff members X All holders of the following manual s SLAC Radioanalysis Laboratory Procedures The following individuals October 16 2006 SLAC I 760 2A39C 009 R 002 Page 3 TABLE OF REVISIONS REVISION DATE SECTION S REASON FOR REVISION 001 March 19 2003 2 4 5 6 7 Clarify Process 002 October 16 All Rewrite of procedure to 2006 incorporate Gamma Spec Source Check procedure Gamma Spec checklist added to appendix October 16 2006 SLAC I 760 2A39C 009 R 002 Page 4 Gamma Spectroscopy Analysis Procedure d PURPOSE aicea ada eat lada dai poa ana duete da alea d a atace a id da dala A 6 2 REFERENCES scoica eee canada aia ae o aaa id iata gabi nadie sa 6 3 RESPONSIBILITIES sitiar Piata teii d adio al oa deal 6 3 1 Rad Lab Operator st tata cita e Adan etal aste da 6 3 2 REP Manager ui A A ee ee 6 4 PREREQUISITES nnie neersien ido 7 5 PROCEDURES iii eius Gan sebre li a eO OSE ros ae aid aa a Dau Dad o lite 7 5 1 Perform d NA Check reia e an ca a ta ta bg Sl a a 7 5 2 Gountithe Sample as s
19. that prerequisites are met as required e maintenance of the laboratory equipment and performing daily quality control checks e reporting any problems or unexpected events to the Radiological Environmental Protection REP Manager e routine sample analysis counting e providing the data to the REP Manager for analysis and approval and e Performing other duties assigned by the REP Manager 3 2 REP Manager The REP Manager is responsible for October 16 2006 SLAC I 760 2A39C 009 R 002 Page 6 Gamma Spectroscopy Analysis Procedure e ensuring that the activities in this chapter are conducted in accordance with this written procedure e assigning the tasks in this procedure to a qualified operator and e providing final approval or disapproval of all data and submittals 4 PREREQUISITES 4 1 Must be familiar with Windows operating menus Microsoft Access and Notepad 4 2 Must be familiar with Rad Lab general sample analysis procedures 4 3 Must have a basic understanding of Gamma Spectroscopy theory 4 4 Must be familiar with general laboratory equipment pipettes scales etc 5 PROCEDURES 5 1 Perform a QA Check As part of the instrument quality control process a QA check should be performed daily when the Gamma Spectroscopy system is in use This is accomplished by running the source check macro The macro will first count with an empty cave to verify that detector system has not been contaminated A source stand
20. you when the QA is complete Click OK and check the status page 9 When the count in complete check the QA Status page by selecting Acquire and QA then Status A window should pop up displaying the results Verify that the Background CPS Total Activity Peak Shift and Av FWHM Ratio parameters are all satisfactory This is indicated by an o k next to each value 10 If there is a warning or violation next to any QA parameter verify that the QA was performed correctly Confirm that the correct source was used the cave was empty during the contamination check etc Rerun the DailyQACheck macro once more If the warning violation persists notify the REP program mgr The system may need an adjustment before any samples can be counted October 16 2006 SLAC I 760 2A39C 009 R 002 Page 10 Gamma Spectroscopy Analysis Procedure Done Step Item No 11 Date amp initial the Gamma Spec Source Check log in the Rad Lab System info binder if the source check was successful Note any corrections made to the system 12 Remove the standard from the counter amp store it in cabinet in Room 162 Assure both cabinet amp room door are locked Count the Sample 13 From the drop down menu on the main page select the detector you wish to count the sample Use top menu bar to select Services amp Job Control In the User folder se
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