ML19319D525
| ML19319D525 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 07/25/1973 |
| From: | US ATOMIC ENERGY COMMISSION (AEC) |
| To: | |
| Shared Package | |
| ML19319D519 | List: |
| References | |
| NUDOCS 8003170651 | |
| Download: ML19319D525 (2) | |
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4 ATTACHME!TT I REOUIREMENTS FOR RADIOLOGICAL SURVEILLANCE OF MILK A.
General Samples of milk will be obtained from animals producing milk for human consumption at locations which may be affected by emissions from the Crystal River Plant. Samples will be obtained and analyzed i
monthly for complete gamma spectrum, strontium-89, -90 and for radioiodine, with sensitivity and accuracy for the radioiodine
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analysis as given in (B), below, which defines special Requirements for Surveillance of Milk for Radioactive Iodine.
Special attention will be paid to those locations where milk is pro-duced for direct consumption by humans --e.g.,
the family farm.
If there are a considerable number of locations where milk is 4
I produced in the vicinity of the plant, location (s) may be chosen which may serve as valid indicator (s) of other locations in that meteorological sector, rather than sampling every location.
B.
Requirements for Surveillance of Milk for Radioactive Iodine In addition to the general requirements in (A), during the seasons that animals producing milk for human consumption are on pasture, samples of fresh milk will be obtained weekly from these animals at locations that may be significantly affected* by emissions from the Crystal River Plant, and analyzed for their radioiodine content, calculated as iodine-131. Analysis will be carried out within eight i
days (one I-131 half-life) of sampling. Suitable analytical proce-dures will be used to determine the radioiodine concentration to a sensitivity of 0.5 picoeuries per liter of milk at the time of sampling. For activity levels at or above 0.5 picocuries per liter, counting statistics will be such that - the standard deviation (one sigma confidence level) of the net counting rate will be 10% or less. Over-all error of the analysis will be within '.25%.
Results will be reported, with associated calculated error, as picocuries of.I-131 per liter of milk at the time of sampling, in accordance with Reporting Requirements for Environmental Radiological Monitoring.
- For.the purposes of this requirement, "significantly affected" means that calculations, using standard AEC staff assumptions, predict that a one year old child drinking milk produced by animals at that location, may receive a thyroid dose of 1 mrem / year or greater.
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e~s 9 Basis A concentration of I-131 in milk of 0.8 picocuries per liter will result in a dose to the thyroid of a 0-2 year old child of 5 mrem / year, based upon consumption of one liter per day for the year. To assure that no child will receive a dose of greater than 5 mrem / year to the thyroid, it is necessary to know the radioiodine concentration in the milk to the sensitivity given above, 0.5 pCi/ liter.
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