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:
- Joe Joe Klinger Klinger, Chief
, Chief
- Division of Radioactive Materials Division of Radioactive Materials
- IL Dept. of Nuclear Safety IL 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 maintenance Inexpensive, very little maintenance
- Ubiquitous (12,000+ IL)/350,000 in Ubiquitous (12,000+ IL)/350,000 in NRC jurisdictions NRC jurisdictions
- Mfrd Mfrd//dist dist. under
. under sp sp.. lic lic. and used
. and used under general license (
under general license (gl gl))
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-- Pure Beta Emitter, 18.6 Pure Beta Emitter, 18.6 KeV KeV
-- T 1/2=12.3 T 1/2=12.3 Yrs Yrs/Bio.T 1/2=10 days
/Bio.T 1/2=10 days
-- Phosphor=
Phosphor=ZnS ZnS on tube walls on tube walls
-- Glows due to Beta interactions Glows due to Beta interactions w/phosphor 4422
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Problems Problems
- Multi-Curie quantities of Hydrogen-3 Multi-Curie quantities of Hydrogen-3
- GLs GLs not required to license or register not required to license or register
- Not aware of ram Not aware of ram
- Not aware that they are regulated Not aware that they are regulated
- Not aware of proper disposal Not aware of proper disposal Inadequate labeling 4422
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Problems (
Problems (cont cont.)
.)
- Safe and effective unless you have Safe and effective unless you have the inquisitive, intelligent(?!) and the inquisitive, intelligent(?!) and most dreaded of all:
most dreaded of all:
4422 THE TRITIUM THE TRITIUM GUY GUY
NJ Tritium Guys NJ Tritium Guys
-- swim suit posters, sunflower seeds swim suit posters, sunflower seeds
-- Fire Dept., GM Tube. No Fire Dept., GM Tube. No Contamination!
Contamination!
-- NJDEP investigated NJDEP investigated
-- 23 Agencies, $100,000 +, TEDE 80 23 Agencies, $100,000 +, TEDE 80 mrem (256) 4422
- 2nd-Teen-Child 2nd-Teen-Child Trtmt Trtmt Center Center
-- Tantrum Tantrum
-- 15 Curies, several tubes broken 15 Curies, several tubes broken
-- 930,000 930,000 dpm dpm/100cm2 in
/100cm2 in bedroom/16 bedroom/16 mrem mrem NJ (
NJ (cont cont.)
.)
- $200,000+16 mrem 4422
IL Tritium Experience IL Tritium Experience
- Nov 1, 1999--MINWAX in Flora, IL Nov 1, 1999--MINWAX in Flora, IL
- Damaged sign (Self-powered Damaged sign (Self-powered Lighting, Elmsford, NY)
Lighting, Elmsford, NY)
- Scavenger-(
Scavenger-(aka aka Tritium Guy)
Tritium Guy)
Home 4422
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- Wipe samples only effective means Wipe samples only effective means of measurement of measurement
- IDNS Lab in Springfield. Liquid IDNS Lab in Springfield. Liquid Scintillation (Phosphor interference)
Scintillation (Phosphor interference)
- Urinalyses Urinalyses
- Portable Proportional Gas Flow Portable Proportional Gas Flow Contamination Contamination Assessment Assessment Proportional Counter 4422
Contamination Limits Contamination Limits
-- 1,000 1,000 pCi pCi/100 cm2
/100 cm2
-- 5,000 5,000 pCi pCi/100 cm2 Max.
/100 cm2 Max.
-- Fixed--250 Fixed--250 microrem microrem/hr @ 1 cm
/hr @ 1 cm 4422
4422 Before Before Decon Decon
Before Decon 4422
Before Before Decon Decon 4422
IDNS Decontamination IDNS Decontamination Decision Decision
- Luxury of contamination confined to Luxury of contamination confined to a non-residence a non-residence
- Luxury of time for H-3 Luxury of time for H-3 concentration reduction over time concentration reduction over time
- Most of the source was initially Most of the source was initially removed. Contamination was like a removed. Contamination was like a particulate 4422
IDNS Decontamination IDNS Decontamination Decision (
Decision (cont cont.)
.)
- Equipment, supplies, manpower to Equipment, supplies, manpower to conduct ourselves and save expense conduct ourselves and save expense
- Opportunity for staff for practical Opportunity for staff for practical health physics experience health physics experience 4422
Decon Decon Methods Methods
- Rotated duties Rotated duties
- Non-phosphate detergent and water Non-phosphate detergent and water (detector interference)
(detector interference)
- Iso Iso--propyl propyl alcohol alcohol
- Washed down and air-dried.
Washed down and air-dried.
Ventilation and heating, Ventilation and heating, collander collander for small items 4422
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After Decon 4422
4422 After After Decon Decon
4422 After After Decon Decon
Final Dose Estimates Final Dose Estimates
- Tritium Guy--7.1 Tritium Guy--7.1 mrem mrem (DOE (DOE REMedy REMedy and ANSI HPS N13.14-and ANSI HPS N13.14 1994) 4422
Final Dose Estimates Final Dose Estimates
((cont cont.).)
-- REMedy REMedy-SAIC, integrates ICRP 30
-SAIC, integrates ICRP 30 biokinetcs biokinetcs models, TEDE based on models, TEDE based on avg avg <urine> 24 hr. periods.
<urine> 24 hr. periods.
-- Tritium Spouse--1.07 Tritium Spouse--1.07 mrem mrem/Tritium Daughter--1.06
/Tritium Daughter--1.06 mrem
- Highest IDNS --.18 mrem 4422
Final Cost Estimates Final Cost Estimates
- Staff Time including Staff Time including decon decon,, ntgs ntgs.,.,
travel = $31, 735 travel = $31, 735
- Bioassay analyses = $11,700 Bioassay analyses = $11,700
- Wipe Sample analyses = $16,650 Wipe Sample analyses = $16,650
- Disposal of 4 drums of waste =
Disposal of 4 drums of waste =
$4,000
$4,000 TOTAL = $64,085.00 4422
Final Recommendations Final Recommendations
- Labeling improvements Labeling improvements
- Sales literature improvements Sales 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.
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(cont.)
Final Recommendations Final Recommendations
- 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.
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Final Recommendations Final Recommendations
((cont cont.).)
- Revisit Acceptable Surface Revisit 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 detection and decon decon efforts efforts
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