ML23062A706
| ML23062A706 | |
| Person / Time | |
|---|---|
| Issue date: | 10/02/2000 |
| From: | Klinger J Office of Nuclear Material Safety and Safeguards |
| To: | |
| Shared Package | |
| ML23062A719 | List: |
| References | |
| Download: ML23062A706 (40) | |
Text
THE TRITIUM GUY THE TRITIUM GUY
- Presented by:Presented by:
- JoeJoe KlingerKlinger, Chief, Chief
- Division of Radioactive Materials*Division of Radioactive Materials
- IL Dept. of Nuclear SafetyIL Dept. of Nuclear Safety
4422 Generally Licensed Exit Generally Licensed Exit Signs Signs
- Safe and Important: Fires,Safe and Important: Fires, electrical blackouts electrical blackouts
- Inexpensive, very little maintenanceInexpensive, very little maintenance
- Ubiquitous (12,000+ IL)/350,000 inUbiquitous (12,000+ IL)/350,000 in NRC jurisdictions NRC jurisdictions
- Mfrd*Mfrd // distdist. under. under spsp.. liclic. and used. and used under general license ( glunder general license (gl ))
4422 Exit Signs Exit Signs
- Glass Tubes: Gaseous Tritium*Glass Tubes: Gaseous Tritium
- Pure Beta Emitter, 18.6Pure Beta Emitter, 18.6 KeVKeV
- T 1/2=12.3T 1/2=12.3 YrsYrs /Bio.T 1/2=10 days/Bio.T 1/2=10 days
- Phosphor=Phosphor= ZnSZnS on tube wallson tube walls
- Glows due to Beta interactions-Glows due to Beta interactions w/phosphorw/phosphor
4422 44224422 44224422 Problems Problems
- Multi-Curie quantities of Hydrogen-3*Multi-Curie quantities of Hydrogen-3
- GLsGLs not required to license or registernot required to license or register
- Not aware of ramNot aware of ram
- Not aware that they are regulatedNot aware that they are regulated
- Not aware of proper disposalNot aware of proper disposal
- Inadequate labeling*Inadequate labeling 4422 44224422 44224422 44224422 Problems ( contProblems (cont.).)
- Safe and effective unless you haveSafe and effective unless you have the inquisitive, intelligent(?!) and the inquisitive, intelligent(?!) and most dreaded of all:
most dreaded of all:
THE TRITIUM THE TRITIUM GUY GUY
4422 NJ Tritium Guys NJ Tritium Guys
- swim suit posters, sunflower seeds-swim suit posters, sunflower seeds
- Fire Dept., GM Tube. NoFire Dept., GM Tube. No Contamination! Contamination!
- NJDEP investigatedNJDEP investigated
- 23 Agencies, $100,000 +, TEDE 8023 Agencies, $100,000 +, TEDE 80 mrem (256)mrem(256)
4422 NJ ( contNJ (cont.).)
- 2nd-Teen-Child2nd-Teen-Child TrtmtTrtmt CenterCenter
- TantrumTantrum
- 15 Curies, several tubes broken-15 Curies, several tubes broken
- 930,000930,000 dpmdpm /100cm2 in/100cm2 in bedroom/16 mrembedroom/16mrem
- $200,000+16$200,000+16 mremmrem
4422 IL Tritium Experience IL Tritium Experience
- Nov 1, 1999--MINWAX in Flora, ILNov 1, 1999--MINWAX in Flora, IL
- Damaged sign (Self-poweredDamaged sign (Self-powered Lighting, Elmsford, NY)
Lighting, Elmsford, NY)
- Home*Home
4422 44224422 44224422 44224422 44224422 44224422 44224422 Contamination Contamination Assessment Assessment
- Wipe samples only effective meansWipe samples only effective means of measurement of measurement
- IDNS Lab in Springfield. LiquidIDNS Lab in Springfield. Liquid Scintillation (Phosphor interference)
Scintillation (Phosphor interference)
- UrinalysesUrinalyses
- Portable Proportional Gas Flow*Portable Proportional Gas Flow Proportional Counter Proportional Counter
4422 Contamination Limits Contamination Limits
- 340 Appendix A (Similar to NRC RG340 Appendix A (Similar to NRC RG 1.86) 1.86)
- 1,0001,000 pCipCi /100 cm2/100 cm2
- 5,000-5,000 pCipCi /100 cm2 Max./100 cm2 Max.
- Fixed--250Fixed--250 microremmicrorem /hr @ 1 cm/hr @ 1 cm
4422 Before DeconBeforeDecon
4422 Before DeconBeforeDecon
4422 Before DeconBeforeDecon
4422 IDNS Decontamination IDNS Decontamination Decision Decision
- Luxury of contamination confined toLuxury of contamination confined to a non-residence a non-residence
- Luxury of time for H-3Luxury of time for H-3 concentration reduction over time concentration reduction over time
- Most of the source was initiallyMost of the source was initially removed. Contamination was like a removed. Contamination was like a particulate particulate
4422 IDNS Decontamination IDNS Decontamination Decision ( contDecision (cont.).)
- Equipment, supplies, manpower toEquipment, supplies, manpower to conduct ourselves and save expense conduct ourselves and save expense
- Opportunity for staff for practicalOpportunity for staff for practical health physics experience health physics experience
4422 Decon MethodsDecon Methods
- Rotated dutiesRotated duties
- Non-phosphate detergent and waterNon-phosphate detergent and water (detector interference)
(detector interference)
- Iso*Iso -- propylpropyl alcoholalcohol
- Washed down and air-dried.Washed down and air-dried.
Ventilation and heating, collandercollander Ventilation and heating, for small items 4422 for small items 44224422 44224422 44224422 44224422 After DeconAfterDecon
4422 After DeconAfterDecon
4422 After DeconAfterDecon
4422 Final Dose Estimates Final Dose Estimates
- Tritium Guy--7.1Tritium Guy--7.1 mremmrem (DOE(DOE REMedy and ANSI HPS N13.14-and ANSI HPS N13.14 REMedy 1994) 1994)
4422 Final Dose EstimatesFinal Dose Estimates
( cont(cont.).)
- REMedyREMedy -SAIC, integrates ICRP 30-SAIC, integrates ICRP 30 biokinetcs models, TEDE based onbiokinetcsmodels, TEDE based on avg <urine> 24 hr. periods.avg<urine> 24 hr. periods.
- Tritium Spouse--1.07-Tritium Spouse--1.07 mrem /Tritium Daughter--1.06mrem/Tritium Daughter--1.06 mrem mrem
- Highest IDNS --.18 mrem
- Highest IDNS --.18 mrem
4422 Final Cost Estimates Final Cost Estimates
- Staff Time includingStaff Time including decondecon,, ntgsntgs.,.,
travel = $31, 735 travel = $31, 735
- Bioassay analyses = $11,700Bioassay analyses = $11,700
- Wipe Sample analyses = $16,650Wipe Sample analyses = $16,650
- Disposal of 4 drums of waste =*Disposal of 4 drums of waste =
$4,000 $4,000
- TOTAL = $64,085.00TOTAL = $64,085.00
4422 Final Recommendations Final Recommendations
- Labeling improvementsLabeling improvements
- Sales literature improvementsSales literature improvements (install and forget about for 20 (install and forget about for 20 years!). Enhanced communication years!). Enhanced communication with contractors, vendors, building with contractors, vendors, building owners etc.
owners etc.
4422 Final Recommendations Final Recommendations
( cont(cont.).)
- Discourage proliferation simply to*Discourage proliferation simply to avoid running electrical wire. avoid running electrical wire.
- Install protection to avoid damage.*Install protection to avoid damage.
4422 Final Recommendations Final Recommendations
( cont(cont.).)
- Revisit Acceptable SurfaceRevisit Acceptable Surface Contamination Levels in NRC RG Contamination Levels in NRC RG 1.86 and related documents 1.86 and related documents
- Possible technological*Possible technological improvements to solidify or mix improvements to solidify or mix phosphor with H-3 to improve phosphor with H-3 to improve detection and decondetection anddecon effortsefforts
neighborhood!
4422