ML19353A810
| ML19353A810 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/10/1981 |
| From: | Seo T AFFILIATION NOT ASSIGNED |
| To: | Barrett L Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19353A808 | List: |
| References | |
| NUDOCS 8105070535 | |
| Download: ML19353A810 (2) | |
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RESEARCH REACTOR
'NSTITUTE KYOTO UNIVERSITY KUMATORI-CHO. SENNAN-GUN OSAKA, JAPAN.
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March 10, 1981 i
I Dr. Lake H. Barrett Section Leader Environmental Evaluation Brant Division of Operating Reactors Office of Nuclear Reactor Regulction Nuclear Regulatory Commission Washington, D. C.'20555 j
Dear Dr. Barrett:
I am interested in the radioactive noble gas releases from the TMI-2 accident.
Although I read a number of reports concern-ing.this matter, I have not found any formal estimate of the
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total nnble gas releases except your preliminary one titled "Preli
( n;d; Estimates of Radioactivity Releases from Three Mile
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Island ' a p*
12, 1979).
1 think this is not a final estimate to be le ;-rsnted formally by NRC.
j In the report. NUREG-0600, NRC quoted a value, 1.0 x 10 Ci, I
estimated by the licensee (Met. Ed.).
Thta estimate looks more j
plausible in view of the calculation proce2ure adopted.
I have examined it careful /.y in order to try to make sy c.*n estimation.
Then, I found out eltaentary but serious errurs as we'l as many questionable assumptions in the licensee's calculation.
The correction of these errors would yield a considerable change in the result of estimation.
Unfortunately, the data available for me are insufficient for a more detailed examination.
The most necessary data for this tes* are the quarter-hourly data of the meteorological condition; wind speed, wind direction and vertical temperature difference, from which atmospheric dispersion estimates can be made as a function of time.
Other data, such as the direct r
readings of the area monitors named HPR-3236 and HPR-3240, figures r
1 81050 0 $ y 7
showing in detail'the locations of the monitors, HPF-3236, HPR-
-3240 and HPR-219(G,P,1), and the seasured efficiencies of the
. charcoal cartridges used in the monitor HPR-219 (I) and the off-site eight monitors (IS2,8C1,5A1,7G1,1C1,12B1 and 9Gl), are very helpful for my task.
I would very much appreciate these data and NRC's formal j
estimate if it.was presented.
I would like to know NRC's l
comments on the above-mentioned errors involved in the licensee's i
calculation.
Sincerely, i
Takeshi Seo i
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