ML19322E276
| ML19322E276 | |
| Person / Time | |
|---|---|
| Issue date: | 01/23/1980 |
| From: | Scarano R NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Hazle A COLORADO, STATE OF |
| References | |
| REF-WM-22 NUDOCS 8003270075 | |
| Download: ML19322E276 (4) | |
Text
- _ _ _
fb$
pa ucuq
,(
k UNITED STATES NUCLEAR REGULATORY COMMISSION 3
o 5 **
p WASHINGTON, D. C. 20555
%.,,,,+
JAN 2 31980 WMUR:RC WM-22 Mr. Albert J. Hazle, Director Radiation and Hazardous Waste Control Division Colorado Department of Health 4210 East lith Avenue Denver, Colorado 80220
Dear Mr. Hazle:
The radiological impact evaluation of the Cotter uranium mill in Canon City, Colorado on the proposed Oro Verde subdivision has been performed as requested in your letter to G. Wayne Kerr, dated December 19, 1979.
A copy of the results are enclosed.
The data were derived through the use of our modified UDAD program which utilized the same assumptions as in our previous analyses for this site.
Since the data are the result of a predictive analysis and since the effects of local terrain were not addressed in this run, it is recommended that the Department require Cotter Corporation to install air monitoring equipment at the boundary of the subdivision nearest the Cotter site
'.a enable a more accurate determination of doses.
It is our understanding that this should fulfill your requested needs.
If further questions arise on this matter or other actions are required, please adivse.
Sincerely, l
/
/
/ ossa.Scarano, Chief R
Uranium Recovery Licensing Branch Division of Waste Management
Enclosure:
As stated l
B 0032 7 0 07{
l l
i.
1 ENCLOSURE 1.
Maximum individual from previous assessment 4/79.
5.3 km E of mill Total Dose Commitments (mrem /yr)
Bronchial Exposure Pathway Total Body Bone Lung Epithelium Inhalation 0.16 4.54 13.4 16.0 External 2.90 2.90 2.90 Veg. Ingestion 1.06 12.7 1.06 Meat Ingestion
- 0.44 5.58 0.44 4'56 25.72 17.80 16.0 4
40 CFR 190 Dose Commitments (mrem /yr)**
Exposure Pathway Total Body Bone Lung
~
Inhalation 0.16 4.54 13.4 External 0.09 0.09 0.09 Veg. Ingestion 1.06 12.7 1.06 Meat Ingestion
- 0.44 5.58 0.44 1.75 22.91 14.99
- Meat ingestion doses from cattle grazed 1.82 km ESE of mill.
- These dose conmitments exclude contributions from Rn-222 and its radioactive daughters.
s 6
< s.-
2.
Residence location 1.07 km W of mill 1/80.
Total Dose Commitments (mrem /yr)
Bronchial Exposure Pathway Total Body Bone Lung Epithelium Inhalation 0.49 14.2 59.3 57.4 External 4.83 4.83 4.83 Veg. Ingestion -
1.79 21.7 1.79 Meat Ingestion
- 0.44 5.58 0.44 7~.55 46.31 66.36 57.4 40 CFR 190 Dose Comitments (mrem /yr)**
Exposure Pathway Total Body Bone Lung Inhalation 0.49 14.2 59.3 External 0.23 0.23 0.23 Veg. Ingestion 1.79 21.6 1.79 Meat Ingestion
- 0.44 5.58 0.44 2.95 41.61 61.76 1
- Meat ingestion doses from cattle grazed 1.84 km ESE of mill.
- These dose comitments exclude contributions from Rn-222 and its radioactive daughters.
<rc 3.
Residence location 1.07 km MNW of mill 1/80 Total Dose Commitments (mrem /yr)
Bronchial Exposure Pathway Total Body Bone Lung Epithelium
-Inhalation 0.56 16.6 71.4 64.0 External 5.46
.5.46 5.46 Veg. Ingestion 2.02 24.4 2.02 Meat Ingestion
- 0.44-5.58 0.44 8.48 52.04 79.32 64.0 40 CFR 190 Dose Comnitments (mrem /yr)**
External Pathway Total Body Bone Lung Inhalation 0.56 16.6 71.4 External 0.27 0.27 0.27 Veg. Ingestion 2.20 24.4 2.02 Meat Ingestion
- 0.44 5.58 0.44 3.47 46.85 74.13
- Meat ingestion doses from cattle grazed 1.82 ESE of mill.
- These dose commitments exclude contributions from Rn-222 and its radioactive daughters.
40 CFR 190 limits doses to any member of the public as follows:
r i) 25 millirems / year to the whole body, ii) 75 millirems / year to the thyroid, and 111) 25 millirems / year to any other organ.
The lung dose to any individual at location 3 exceeds the limit by a factor of 2.97.
1 e
1
. -. ~..