ML20010B808
| ML20010B808 | |
| Person / Time | |
|---|---|
| Issue date: | 07/24/1981 |
| From: | Mattson R Office of Nuclear Reactor Regulation |
| To: | Drey K AFFILIATION NOT ASSIGNED |
| Shared Package | |
| ML20010B809 | List: |
| References | |
| NUDOCS 8108180128 | |
| Download: ML20010B808 (3) | |
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M tral Files BSnyder NRR Reading Files RJMattson E00 Reading Files WEKreger RAB Reading Files FJCongel JUL 2 41981 PPAS EFBranagan PDR w/ incoming WWHeinke H De on S
-ED0#10645 Ms. Kay Drey TEllurley BCapra 515 West Point Avenue RVollmer CPaul DEisenhut University City, Missouri 63130 SHanauer
Dear Ms. Drey:
We have received your letter of July 2,1981, to Mr. William Dircks requesting
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additional information on doses received by human beings from naturally occarring potassium-40 in the body. The value of 19 (rounded to 20) mrem /yr for the natural background potassium-40 dose rate that was stated in the February 3,1981 letter fron Mr. Dircks to Senator Danforth and referenced by you was taken from page 104 of NCRP Report No. 45. This report, entitled, " Natural Background Radiation in the United States", was issued November 15, 1975 and is available from the National Council on Radiation Protection md Measurements, 7910 Woodmont Avenue, Washington, D.C. 20014.
Questions concerning derivation of that value should be directed to the NCRP or to Dr. John Harley who chaired the committee that developed f!CRP Report No. 45.
Dr. Harley's address is P. O. Box 728, Hoboken, New Jersey 07030; 'ils telephone number is (201) 793-3705.
You also asked about good references on Relative Biological Effectiveess (RBE) af potassium-40. Two good basic texts on health physics and radiation atologv hat discuss RBE in general are " Introduction to Health Physics," H. Comber, nJ9, hrgamon Press and " Radiation Biology,"
A. P. Casarett,1968, Prentice-Hall. Both snould be available in most large libraries; the latter book in particular devotes several pages to RBE.
, %g Sincerely,
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9 05 BP f
Roger J. liattson, Director
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