ML19321B147
| ML19321B147 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/07/1980 |
| From: | Harold Denton Office of Nuclear Reactor Regulation |
| To: | Romano F AFFILIATION NOT ASSIGNED |
| Shared Package | |
| ML19321B148 | List: |
| References | |
| NUDOCS 8007280182 | |
| Download: ML19321B147 (1) | |
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DISTRIBUTION:
NRC PDR w/ incoming MGroff (NRR #4042)
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Docket No. 50-320
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Mr. Frark R. Romano Dross b
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61 Forest Avenue SHanauer Ambler, Pennsylvania 190C2 RMattson
Dear Mr. Romano:
This is in response to your letter of May 9,1980, in which you expressed ccncern l
because no " notice to airmen
- was issued in conjunction with the release of krypton-85 frce Three Mile Island, Unit 2 on April 23, 1980.
You are correct in your assumption that the Unit 2 containment enty did not take place on April 24 as planned; however, a very small annunt of krypten-85 (about 1/20th of a curie) was released on April 23. If all activities in conjunction with the. planned entry into the TMI Unit-2 containment on April 23 and 24 had taken place, a release of approximately 25 curies of krypton-85 to the environ-ment would have occurred. Assuming poor meterological conditions, this would have resulted in a maximas total-body egosure of approximately 0.008 millires at the site boundary. Personnel in aircraft on the glide path for brief periods of time close to TM1 would have received an even lower dose V radiation.
Egosure from background radiation.results in a total-body dose of approximately 0.3 millirem per day to the population.. Therefore, the 0.008 millires projected egosure from knpton releases results in a relatively insigificant increase in population agosure above.that received from background radiation. Accordingly, a special warning to the aviation coamunity concerning hazardous radiation agosures was not deemed necessary in this instance.1 s. a point of interest,'for A
every hour of flying [=t 35.000 foot, altitude, a pilot receives about 1 millires g.I.t ;".1h i =[}jsf y jhh,7.
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