ML20147B253
| ML20147B253 | |
| Person / Time | |
|---|---|
| Issue date: | 12/07/1978 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Clay Johnson MINNESOTA, UNIV. OF, MINNEAPOLIS, MN |
| References | |
| 22-00218-29, 22-218-29, NUDOCS 7812150196 | |
| Download: ML20147B253 (2) | |
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T, OLEN E LLYN, ILLINolS 60137 DEC 01.378 University of Minnesota License No. 22-00218-29 A *TN:
Mr. Clint T. Johnson Associate Vice President uirrill Hall M1.aeapolis.: Minnesota 55455 Gentlemen:
This refers to the telephone conversation between you and Mr. Ralph 0. Wollan of your staff and Mr. A.-Bert Davis of my staff on December 5, 1978, regarding evaluations of inte.rnal exposures to personnel at the University and the conttol over airborne radioactivity and intakes of radio-active material.
Wich regard to the matters discussed, we understand that you have undertaken or will undertake the following actions:
1.
For all users under your license institute measures to ensure:
Airborne monitoring of all locations at which air-a.
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- borne Iodine-125 or Iodine-131 is likely to occur.
b.
Bioassay monitoring of all individuals who work with or are exposed to Iodine-125 or Iodine-131 at a frequency to assure meeting the 40 hour4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> control measure (10 CFR 20.103(b)(2))_ and the 40 hour4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> per week for 13 weeks concentration limit (10 CFR 20.103(a)(1)).
c.
Implementation of control measures to assure meeting the 40 hour4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> control measure (10 CFR 20.103(b)).
l 2.
Institute measures to ensure that all procedures relevant to users of radiciodiae are implemented, in particular, your " Rules For Radioactivity Users" which prohibit pipetting by mouth, eating or smoking in the radioisotopes laboratory, and using radioisotapes which may possibly become airborne outside of a hood.
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DECLO'i ]TB 2-University of Minnesota 3.
Perform such surveys (evaluations) to determine the annual average concentrations'of Iodine-125 and Iodine-131 in I
unrestricted areas due to airborne releases.from your hoods..
We understand that items 1, 2 and 3 will be completed by December 12, 1978.
If our understanding of your planned actions as described above is not in accordance with the actual plans and actions being implemented, please contact this office immediately.
Sincerely,
} g,s vsh James G. Keppler Director cc:
Mr. Ralph 0. Wollan Dr. Merle Loken W. P. Ellis, FC&EB Central Files Reproduction Unit NRC 20b PDR NSIC Dr. John Ferman, Ph.D.
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