ML19253D842
| ML19253D842 | |
| Person / Time | |
|---|---|
| Site: | Fermi, 05000000, 05000141 |
| Issue date: | 04/21/1982 |
| From: | John Miller Office of Nuclear Reactor Regulation |
| To: | Finston R STANFORD UNIV., STANFORD, CA |
| Shared Package | |
| ML19253D843 | List: |
| References | |
| NUDOCS 8204230100 | |
| Download: ML19253D842 (1) | |
Text
APR 21 1982 Dccket No. 50-141
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Dr. Roland A. Finston, Director
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1 L-llealth Physics and Biosafety
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Stanford University in 67 Encina Hall
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Stanford, California 94305
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Dear Dr. Finston:
By letter dated March 17, 1981, we provided radiation criteria for release of the dismantled Stanford Research Reactor to unrestribted access. That criteria specified Reg. Guide 1.86 for surface contamination and 5 micro Pem per hour at one meter for reactor generated, gamma emitting isotopes.
Since March 17, 1981, we have refined further our position with respect to release criteria and have detemined that radiation from gamma emitting isotopes is also acceptable if the potential exposure to individuals is less tuan 10 m7em per year with reasonable occupancy assumptions.
If you wish to justi fy gamma exposure rates from reactor generated isotopes that are greater than 5 micro Rea per hour, you should show that reasonable occupancy of that area wou'd be suffic'ently less than 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> per year, which would result in exNsures of less than 10 mRam per year.
Sincerely, OJJcN. gjcyr;p gy JA6:' t R yy' I.ER James R. Miller, Chief Standardization and Special Projects Branch Divisionoof Licensing DISTRIBUTION:-..
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