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Management of Commercially Generated Radioactive Waste - U.S. ...

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F.9<br />

It is estimated that natural fog restricting visibility to 0.4 km or less occurs about<br />

30 hr/year. Icing due to freezing rain can occur between October and April, with an average<br />

<strong>of</strong> one to two storms per year. The mean duration <strong>of</strong> icing on utility lines is 36 hr.<br />

Diffusion climatology comparisons with other locations indicate that the site is typical<br />

<strong>of</strong> the region, with relatively favorable atmospheric dilution conditions prevailing.(a)<br />

Frequency <strong>of</strong> thermal inversion is expected to be about 32% <strong>of</strong> the year, and the frequency <strong>of</strong><br />

thermal stabilities is 19% slightly stable, 27% stable, 20% neutral, and 34% unstable. The<br />

joint distribution <strong>of</strong> windspeed, direction, and stability is given in Table F.5.3.<br />

TABLE F.5.3 Annual Average Joint Frequency Distribution, Percent <strong>of</strong> Occurrence<br />

WIND STARILITY wbND OIRECTION<br />

SpEED(M/S) TYPE NNE NE fNE E ESE S SSE S SSw SW Sw WNW NW NNo<br />

I.10 A .02 0.00 ,D 0.00 .01 .1 0.00 .02 .02 0.00 0.00 .01 .02 0.00 0.00<br />

2.5o 4 .10 .1 .17 .12 .07 .15 .11 .15 .?S .21 .1 .35 .32 .37 .19<br />

.30 A ,27 31 1 .?2 .22 . .30 .*7 .56 .40 .58 .2 .01 .62 .77 .62<br />

b.50 A .0 n?7 .I .06b .25 .72 .73 1.38 .62 1.h .15 .0 .51 6u .59<br />

9.10 A 0.00 0.00 0.0 0.00 0.00 .02 .32 .31 .07 0.00 .0 o<br />

.0a .10 .17 .1<br />

12.2 D n.ao 0,0 0.00 0.00 O.O . u .o o ,0 2 .0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br />

1,10 8 .? .02 .02 .O .02 .02 ,02 .06 .1 0 .0 .01 0.00 ,01 0.00<br />

2.50 B .0o .b .05 .12 .09 .0b .15 .11 140 .12 .1o .21 .16 .10<br />

.3n 8 .10 .14 .05 .1t .05 s .0 . li 321 .21 .1I .07 .23 16b .22 .22<br />

6.5 a .01 . tl .02 01 .07 .07 .05 .07 .02 0.00 0.no .06 21 .21 . 7<br />

9,.0 B 0.00 0.00 0.00 0 000 0<br />

.000 1 .02 .01 0.00 0.00 .01 0.00 .11 .01<br />

12.20 9 n.00 0.00 0.00 0.00 0.00 .00 0.00 0.00 0.00 0.00 0.00 0.00 000 0.00 0.00<br />

1.10 C .0? .,n .,0 0.00 0.00 .01 .01 .01 .01 0.00 .05 .01 .02 0.00 0.00<br />

2.50 C .05 .10 .0a .06 .07 .07 .0 .06 .12 0b .0o .10 ,07 .0Q .09<br />

.30 C .11 ., .07 .0o .07 .05 .17 .12 05 .0a .02 .1b .17 .22 . QI<br />

6.50 C .0? . 1 .0 .0 .01 04 .05 .0u ,07 .01 01 ,02 0.00 .17 .15 .07<br />

9.10 C ,05 0.00 0.00 0.00 0.00 0.00 0.00 .02 0.00 0.00 ,01 .02 .02 .07 0,00<br />

12.20 C ,0C O.n0 0.00 0.00 0.00 0,00 0.00 0,00 0.00 0.00 0,00 0.00 0.00 0.00 0.00<br />

1.10 0 .19 .16 .?2 .0 .07 .09 .07 ,10 .10 .1 .o1 .11 ,07 .10 .09<br />

2.50 0 .50 ,.) S5 .62 .07 .b6 .7 ,.5 .32 3? .c1 .67 .47 ,99 ;oo<br />

U.30 D .73 ," .62 1.03 .QO 1.17 .90 .6 .9 36 .36 .72 1,30 1.65 1.30<br />

.o 50 .? ,P 7 .19. .b .61 , .1 . .35 .20 ,?.? 1 .38 1 ,2 1.0O 78<br />

9.10 0 .10 n .. 0.00 0.00 .01 ,0A .07 .05 o? 01 .01 .16 .07 .2t .10<br />

2.20 D ,02 0,0 0 000 0.00 o .Co 0.oo 0.00 o .02 0,00 O o00 0,00 0.00 0.00 .01 0,00<br />

110 E .Ob ,0? .11 .15 .07 .20 ,09 ,14 .11 ,t .10 .12 .05 .17 ,oo<br />

2,50 E .51 .,5 25 .bl .57 .72 .33 .30 .21 ,12 .52 65 .5 9 .75 ,8a<br />

4.30 E .27 .10 .06b , 3<br />

.26 .91 .69 1.16 ,S5 49 ,3c .67 ,61 ,78 .35<br />

6,5b E .9' 0.00 0.00 .11 ,01 .15 ,30 'Sb 30 .10 O.0 .05 .22 ,09 .02<br />

9.10 E n.00 0.n0 O.nO 0.00 0.00 0.00 0.00 ,1b 0.00 0,00 0.00 0.00 000 00 0,00<br />

1 .,20 E n,00 0.00 0.n00 0.nO ,00 0.00 0.00 .01 0.00 0.00 0,00 0.00 0.00 0.00 0.00<br />

1.10 F .0' ,1 .11 .10 .12 .06 .12 ,19 ,10 15 15 .21 ,09 .10 .20<br />

2,5n F ' ,?2 .15 . 2 .Q0 .ub ,5p .65 .32 .15 ,35 ,63 37 ,67 ,3d<br />

.310 F 0.00 .0) 0.00 .02 .05 .20 .00 .48 .27 i. ' 0. , l 0 404 ,17 .14<br />

S.50 F 0.00- O.nn 0.00 0.00 0.00 M.00 ,0o .01 ,05 6,00 0.00 ,01 0.00 0,00 0.00<br />

;.In F .00 0.00 0.00 0.00 0.00 .00 .0 0,00 0 000.00 0,0 0 6,00<br />

, 00 0 00 0,00<br />

?2,20 F. 0.no 0n 00 0.00 0.0n 0.00 0.00 0.00 0,00 0.00 0.00 0 0.0 00 0 00 0,00 0.00<br />

1.10 0 .no .o, 2 .t ,20 .121 9 . 32 ,1 .17 31 .6b .33 22 .20 ,12<br />

2,5n G .5 .0 .0 07 .1a 17 .32 .65 7a .21 ,23 .P .28 .15 .3S 36<br />

,3o G . .: .01 0.00 1 .01 .I , ,0 . ia .2 0,00 .02 .01 0.00 112 ',O<br />

b,S50 0.00 0.00 0.00 0,00 0.00 0.00 A,00 0.00 0.00 0,00 ',0 C,00 0.00 0.00 0.00<br />

9 o G .00 00 0.00 000 0,00 0.0 0.00 0.00 0.00 0.00 0.00 O,0. 0.00 0.00 0,00 000U<br />

12.20 G 0.0 0.00o 0,00 0.00 0.00 0.00 0,00 0.00 0,00 0.00 .,00 0.00 0.00 0,00 0,00<br />

SUJ4MAY OATA,' FOR ST1i!LITY TYoE A B C 0 E F G<br />

TOrTL PEUCENT FOR STARILITY IS 17.85 5.90 ,.00 39.37 19.6 10.44 7.90<br />

(a) An investigation <strong>of</strong> the variations in atmospheric dispersion among a number <strong>of</strong> sites<br />

around the nation was made to determine differences to be expected in radiation dose<br />

calculations based on atmospheric dispersion because <strong>of</strong> different synoptic conditions for<br />

different locations. For five <strong>of</strong> the eight sites studied it was determined that the maximum<br />

atmospheric dispersion coefficient at 1100 m and at 72 km from the point <strong>of</strong> release<br />

was not greater by more than a factor <strong>of</strong> two over that <strong>of</strong> the reference site. It was no<br />

greater than a factor <strong>of</strong> six for any <strong>of</strong> the other three sites studied.

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