ML19291C108
| ML19291C108 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 01/04/1980 |
| From: | Weiss E SHELDON, HARMON & WEISS |
| To: | NRC OFFICE OF THE SECRETARY (SECY) |
| References | |
| NUDOCS 8001220178 | |
| Download: ML19291C108 (2) | |
Text
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SIIELDON, HAnxox & weiss 17 2 5 i STR C CT, N. W.
SUITC 50 6 u ai~ a s CteoN WAsnINGTON, D. C. 20o06 i, o,,[3'"j,0 G Al b M. =amMcN C L LY N A. W CIS S WILLI A M S.lO A CA N, til AN N C LUZZATTC T' %,
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January 4, 1980 QEC' d the StGS.M ')
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Secretary of the Commission
&#f ATTN:
Chief, Docketing and Service Section
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g U.S. Nuclear Regulatory Commission Washington, D.C.
20555 RE:
Metropolitan Edison Company TMI-1, Unit 1, Docket No. 50-289 Restart
Dear Sir:
The enclosed attachment was inadvertantly omitted from the original copy of the " Union of Concerned Scientists Interrogatories to the Licensee."
I apologi::e for any inconvenience which may have been caused.
Please serve a copy of this attachment on the service list for the above captioned proceeding.
Sincerely, M
,/,Q, Ellyn R. Weiss ERW/dmw Enclosure 1791 033 80 012 2017 K
+
Appendix E t
TECHNICAL ' DETAILS OF CALCtJLATDNS This appendix has bcen written for readers who are f amiliar with accident consequence calculations.
Background information, for those who are not, can be found in Appendix VI of WASH-1400 (the Reactor Safety S ebn
/ g f
/
or in Ref. E-1.
4
.-Y 1)
Dose Calculations
([
c0 h%
A.
Meteorological Model
/
% 9 t
Calculations were made for typical weather conditions:
5 m/sec
.s lO rpeed; Pasquill stability Class, D;.01 c/sec deposition velocity.
A t 2.
independent Caussian pluce model was used with " top hat" approxication.
Dispersion parameters were taken identical to those used in UASH-1400 (for a 30 minute release duration).
Although experimental data used to dete:rcine the dispersion parameters are scarce beyond 20 miles, the model is satisfactory for calculating health effects when a linear relationship is used between dose and response.
In such a case, the total number of health effects depends only upon the total population dose, which in turn is rather insensitive te the dispersion parameters and other modelling details -- if the population dis t ribu tion is un iform.
Variation in the population density with distance from the reactor can introduce a model dependence into the results, but a large-population effect, which dwarfs the radial variations, has already been included by calculating health effects for different wind directions.
In a uniform population distribution model, the inhalation dose component of the population dose tends to vary inversely with the deposition E2 velocity.
See Appendix VI of WASH-1400.
Note that full Caussian calculations were ca d 4: when calcula ting contaminated areas.
1791 034
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