ML20353A324

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Enclosure 21 - Response to Request for Additional Information, Westinghouse Nuclear Fuel Columbia Site Evaluation Report, March 1975 Appendix 2.E
ML20353A324
Person / Time
Site: Westinghouse
Issue date: 12/18/2020
From:
Westinghouse
To:
Office of Nuclear Material Safety and Safeguards
Shared Package
ML20353A275 List:
References
LTR-RAC-20-94, EPID L-201-RNW-0016
Download: ML20353A324 (37)
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WESTINGHOUSE NON-PROPRIETARY CLASS 3 1 to LTR-RAC-20-94 Date: December 18, 2020 Enclosure 21 Response to Request for Additional Information Westinghouse Nuclear Fuel Columbia Site Evaluation Report March 1975 Appendix 2.E

APPENDIX 2.E METEOROLOGY AND CLIMATOLOGY Tables 2.E-1 through 2.E-7 contain climatological and severe weather data for Columbia, South Carolina. Tables 2.E-8, 2.E-9 and 2.E-1O contain heat-ing and air conditioning design data and hydrometeorological information, respectively. T~bles 2.E-11 through 2.E-2O and Figure 2.E-1 contain on-site diffusion climatology information. Table 2.E-21 contains short-term accident estimates of x/Q up to 30 days and Table 2.E-22 contains a sum-mary of assumptions for these estimates. Table 2.E-23 contains reduction factors due to building wake effect on x/Q values. Tables 2.E-24 through 2.E-27 contain estimates of atmospheric dilution factors for the four seasons, winter through fa 11 .

2.E-1

TABLE 2.E-1 MONTHLY TEMPERATURE SUMMARIES IN °F - COLUMBIA, SOUTH CAROLINA(l)

No. of Years Recorded Jan. Feb. Mar. ~ ~ June ~ ~ Sept. Oct. Nov. Dec. Year Maximum, °F 30 56.9 59.7 66.5 76.9 84.5 90.3 92.0 91. 0 85.4 77. l 66.9 57.9 75.4 Minimum, °F 30 33.9 35.5 41. 9 51. 3 59.6 67.2 70.3 69.4 63.5 51. 3 40.6 34.1 51. 5 Monthly, °F 30 45.4 47.6 54.2 64.1 72. l 78.8 81.2 80.2 74.5 .64.2 53.8 46.0 63.5 Record High, oF 7 79 81 88 94 95 104 103 106 97 90 85 83 106

.N rr, Aug .

I Year 1970 1972 1973 1970 1970 1970 1970 1968 1970 1973* 1973 1971 1968 N

Record Low, °F 7 5 5 20 29 36 46 59 53 40 29 12 17 5 Feb.

Year 1970 1973 1967 1972 1971 1972 1972* 1969 1967 1967 1970 1972* 1973*

Highest Temperature 107 °Fin June 1954 +

Lowest Temperature -2 °Fin February 1899

  • Also in earlier months or years.

TABLE 2.E-2 RAINFALL DATA IN INCHES - COLUMBIA, SOUTH CAROLINA(l)

No. of Years Recorded Parameter Jan. Feb. Mar. ~ May June ~ Aug. Sept. Oct. Nov. Dec. Total 30 Mean Total 3.44 3.67 4.67 3. 51 3.35 3.82 5.65 5.63 4.32 2.58 2.34 3.38 46.36 26 Maximum Monthly 7.62 8.68 10.89 5.89 8.85 14. 81 1:1.87 16.72 8.78 12.09 7.20 7.43 Year of Occurrence 1972 1961 1973 1958 1967 1973 1959 1949 1953 1959 1957 1953 26 Minimum N

  • m Monthly 0.97 1. 12 1.25 o. 91 0.29 1.26 1.15 1.11 0.76 T 0.41 0.32 I

w Year of Occurrence 1949 1950 1949 1970 1951 1955 1,957 1968 1958 1963 1973 1955 26 Maximum 24 Hour 2.82 3.69 3.59 3.66 5.57 5.44 5.81 7.66 6.23 5.46 2.30 3.18 Year of Occurrence 1968 1962 1960 1956 1967 1973 1959 1949 1953 1964 1963 1970 T - Trace, an amount too smal.l to measure.

TABLE 2.E-3 SNOW AND ICE PELLETS DATA IN INCHES - COLUMBIA, SOUTH CAROLINA(l)

No~ of Years Recorded Parameter Jan. Feb. Mar. ~ May June ~ Auq. ~ Oct. Nov. Dec. Total 26 Mean Total 0.4 0.9 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T 0.4 1. 9 26 Maximum Monthly 2.2 16.0 3.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T 9. 1 Year of Occurrence J973 1973 1960 1968* 1958 26 Maximum

.N rr, 24 Hour 2.2 15.7 2.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T 8.8

.r::::,. Year of Occurrence 1973 1973 1960 1968* 1958

  • Also in earlier months or years T - Trace, an amount too small to measure

TABLE 2.E-4 RELATIVE HUMIDITY IN PERCENT, DIURNAL VARIATION AND MONTHLY AVERAGE IN PERCENT(l)

COLUMBIA, SOUTH CAROLINA No. of Years Local Year Recorded Time Jan. Feb. Mar. ~ May June ~ Aug. Sept. Oct. Nov. Dec. Average 7 l :00 am 80 74 74 77 84 88 89 91 92 89 84 80 84 7 7:00 am 83 80 83 84 88 90 91 93 94 92 88 85 88 7 1 :00 pm 55 48 48 45 49 54 57 59 56 54 49 55 53 7 7:00 pm 66 57 54 50 61 64 72 74 75 76 71 71 66

.N fTI I

u, Monthly Average 71 65 65 64 71 74 77 79 79 78 73 73 73

TABLE 2.E-5 MONTHLY MEAN NUMBER OF FOG DAYS - COLUMBIA, SOUTH CAROLINA(l)

(25 YEARS OF RECORD)

Jan. Feb. Mar. ~ ~ June ~ ~ ~ Oct. Nov. Dec. Year Mean Fog Days 2 2 2 2 2 2 3 3 3 3 27 N

IT1 O"I

TABLE 2.E-6 MONTHLY WIND DATA - COLUMBIA, SOUTH CAROLINA(l).

No. of Years Recorded Jan. Feb. Mar. ~ May June ~ ~ ~ Oct. Nov. Dec. Year Average Hourly Speed, mph 25 7. 1 7.7 8.4 8.5 7. 1 6.8 6.6 6. l 6.2 6.2 6.5 6.7 7.0 Prevailing Direction 14 SW SW SW SW SW SW SW SW NE NE SW l~SW SW

.rn N

8

TABLE 2.E-7 MONTHLY AVERAGE OF SEVERE WEATHER OCCURRENCE - COLUMBIA, SOUTH CAROLINA(l)

(26 YEARS OF RECORD)

Monthlt Occurrence Jan. Feb. Mar. ~ ~ June ~ ~ Sept. Oct. Nov. Dec. Total Snow, Ice Pellets, Hail 1.0 inch or more * *

  • 0 0 0 0 0 0 0 0
  • N rr, I Thunderstorms 1 1 3 4 6 9 13 10 4 l 1
  • 54 co
  • Less than one-half

TABLE 2.E-8 HEATING AND AIR CONDITIONING DESIGN DATA ( 2)-COLUMBIA, S. C.

  • Parameter Winter Design Data Minimum dry bulb temperature equalled or exceeded 99% of time 23°F Minimum dry bulb temperature equalled or exceeded 97.5% of time 26°F Air Conditioning Design Data Dry Bulb Equalled or exceeded 1% of time 98°F Equalled or exceeded 2.5% of time 95°F Equalled or exceeded 5% of time 93°F Equall'ed or exceeded 10% of time 90°F Wet Bulb Equalled or exceeded 1% of time 79°F Equalled or exceeded 2.5% of time 79°F Equalled or exceeded 5% of time 78°F Equalled or exceeded 10% of time 77°F Number of hours, on the average, that the following temperatures ,are exceeded during the months of May through October Dry Bulb 93°F 172 80°F 1359 Wet Bulb 73°F 1285 66°F 2807
  • Data based on at least 5 years of record 2.E-9

TABLE 2.E-9 MAXIMUM POINT RAINFALL VALUES AT COLUMBIA METROPOLITAN AIRPORT IN INCHES FOR DURATION FROM 30 MINUTES TO 24 HOURS AND RETURN PERIODS OF 25 AND 50 YEARS(J)

Return.

Period (years) 30 min 1 hr 2 hr 3 hr 6 hr 12 hr 24 hr 25 2.32 2.99 3.65 3.99 4.90 5. 71 6.61 50 2.58 3.31 4Q.5 4.4 5.4 6.41 7.42 TABLE 2.E-10 MAXIMUM RECORDED POINT RAINFALL IN INCHES FOR 5 MINUTES TO 24 HOURS, COLUMBIA AREA ( 4)

Minutes Hours 5 10 15 30 60 2 3 6 12 24

.074 1.05 1.39 2.40 3.90 5.03 5.03 5.03 6.77 7.40 2.E-10

TABLE 2. E-11 ANNUAL AVERAGE JOINT FREQUENCY DISTRIBUTION OF WIND SPEED AND DIRECTION FOR ALL STABILITY CLASSES (S)

(NFCS, August 1, 1972 - July 31, 1973)

Direction Wind Speed, knots*

0-3 4-6 7-10 11-16 17-21 2l Total

-N 0.01827 0.00852 0.00392 0100104 o. 00000

  • 0.00000 0.03175 NNE 0.02185 0.015~8 0.01051 0.00322 0.00000 0.00000 0.05156 NE 0.02663 0.02639 0.02157 0.00384 0.00021 0.00000 0.07864 ENE 0.02684 0.02398 0.02232 0.00500 0.00000 0.00000- 0~07814 N

rri E 0.03006 0.02792 0.01592 0.00235 0.00003 0.00000 0.07628 8

ESE 0.02625 0.02071 0.00894 0.00101 0.00000 0.00000 0.05691 SE 0.02843 0.02194 0.00935 0.00135 0.00010- 0.00000 0.06120 SSE 0.02440 0.01673 0.00568 0.00028 0.00000 0.00000 0.04709 s 0.02632 0.01438 0.00576 0.00055 0.00000 0.00000 0.04701 SSW 0.02577 0.01857 0.00751 0.00198 0.00000 0.00000 0.05383 SW 0.04109 0.03418 0.01518 0.00194 0.00003 0.00000 0.09242 WSW 0.03513 0.02064 0.01823 0.01008 0.00090 0.00003 0.08501 w 0.03099 0.02406 0.02367 0.01188 0.00146 0.00006 0.09212 WNW 0.02747 0.02247 0.01175 0.00455 0.00014 0.00000 0.06638 NW 0.02295 0.01477 0.00717 0. 00111 0.00000 0.00000 0.04600 NNW 0.02059 0.01082 0.00378 0.00024 0.00000 0.00000 0.03543 Total 0.43304 0.33206 0.19126 0.05042 0.00287 0.00009 0.99977

  • 1 Knot - 0.515 m/sec; 1 Knot= 1.16 mph.

TABLE 2.E-12 ANNUAL AVERAGE_ JOINT FREQUENCY DIST_RIBUTION OF WIND SPEED AND DIRECTION STABILITY CLASS A*

(NFCS, August l, 1972 - July 31, 1972)

Direction Wind S~eed, knots 0 - 3 4 - 6 7 - 10 11 - 16 17 - 21 > 21 Total N 0.00004 0.00000 0.00000 0.00000 0.00000 0.00000 0.00004 NNE 0.00008 0.00000 0.00000 0.00000 0.00000 0.00000 0.00008 NE 0. 00011 0.00000 0.00000 0.00000 0.00000 0.00000 0. 00011 ENE 0.00008 0.00010 0.00007 0.00000 0.00000 0.00000 0.00025 E o. 00011 0.00021 0.00021

  • 0.00003 0.00000 0.00000 0.00056 ESE 0.00004 0.00014 0.00007 0.00000 0.00000 0.00000 0.00025

.N

  • rr,

......I SE 0. 00001 0.00003 0. 00017 0.00000 0.00000 0.00000 0.00022 N

SSE 0.00008 0.00010 0.00018 0.00000 0.00000 0.00000 0.00029 s 0.00077 0.00045 0.00021 0.00000 0.00000 0.00000 0.00143 SSW 0.00015 0.00003 0.00003 0.00000 0.00000 0.00000 0.00022 SW 0.00022 0.00007 0.00000 0.00000 0.00000 0.00000 0.00029 WSW 0.00011 0.00000 0.00003 0.00000 0.00000 0.00000 0.00015 w 0.00001 0.00000 0.00000 0.00003 0.00000 0.00000 0.00004 WNW o. 00001 0.00000 0.00000 0.00000 0.00000 0.00000 0. 00001 NW 0.00001 0.00000 0.00000 0.00000 0.00000 0.00000 0.00001 NNW 0. 00015 0.00000 0.00000 0.00000 0.00000 0.00000 0.00015 TOTAL: *O. 00194 0.00114 0.00090 0.00007 0.00000 0.00000 0.00405

  • The total percentage of calms for this stability is 0.00010.

TABLE 2.E-13 ANNUAL AVERAGE JOINT FREQ_UENCY DISTRIBUTION OF WIND SPEED AND DIRECTION STABILITY CLASS B*

(NFCS, August 1, 1972 - July 31, 1973)

Direction Wind Seeed, knots 0 - 3 4 - 6 7 - 10 11 - 16 17 - 21 > 21 Tota'l N 0.00007 0.00000 0.00000 0.00000 0.00000 0. 00000 _ 0.00007 NNE 0.00007 0.00007 0.00003 0.00000 0.00000 0.00000 0.00017 NE 0.00017 0.00017 0.00000 0.00000 0.00000 0.00000 0.00035 ENE 0.00014 0.00021 0.00003 0.00000 0.00000 0.00000 0.00038 E 0.00000 0.00007 0.00000 0.00000 0.00000 0.00000 0.00007 ESE 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 N

1"'11 I SE 0.00010 0.00024 0.00003 0.00010 0.00007 0.00000 0.00055

-a w SSE 0.00003 0.00024 0.00000 0.00007 0.00000 0.00000 0.00035 s 0.00024 0.00007 0.00038 0.00003 0.00000 0.00000 0.00069 SSW 0.00017 0.00017 0.00024 0.00021 0.00000 0.00000 0.00080 SW 0. 00017 0.00021 0.00003 0.00000 0.00000 0.00000 0.00042 WSW 0.00007 0.00007 0.00003 0.00000 0.00000 0.00000 0.00017 w O.OOOJO 0.00003 0.00003 0~00000 0.00000 0.00000 0.00017 WNW 0.00007 0.00021 0.00000 0.00000 0.00000 0.00000 0.00028 NW 0.00007 0.00003 0.00000 0.00000 0.00000 0.00000 0.00010 NNW 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 TOTAL: 0.00156 0.00180 0.00080 0.00042 0.00007 0.00000 0.00465

  • The total percentage of calms for this stability is*o.00007.

TABLE 2.E-14 ANNUAL AVERAGE JOINT FREQUENCY DISTRIBUTION OF WIND SPEED AND DIRECTION STABILITY CLASS C*

(NFCS, August 1, 1972 - July 31, 1973)

Direction* Wind Seeed, knots 0 - 3 4 - 6 7 - 10 11 - 16 17 - 21 > 21 Total N 0.00052 0.00055 0.00021 0.00007 0.00000 0.00000 0.00135 NNE 0.00097 0.00139 0.00042 0.00024 0.00000 0.00000 0. 00291 NE 0.00118 0. 00121 0.00028 0.00003 0.00000 0.00000 0.00270 ENE 0.00083 0.00062 0.00021 0.00000 0.00000 0.00000 0.00166 E 0.00083 0.00146 0.00014 0.00000 0.00000 0.00000 0.00243 N) rr, ESE 0.00094 0.00073 0.00003 0.00000 0.00000 0.00000 0.00170 I

__. SE 0.00097 0.00107 0.00031 0. 00021 0.00003 0.00000 0.00260 SSE 0.00076 0.00142 0.00086 0.00014 0.00000 0.00000 0.00298 s 0.00222 0.00624 0.00423 0.00049 0.00000 0.00000 0.01318 SSW 0.00288 0.00971 0.00628 0.00177 0.00000 0.00000 0.02063 SW 0.00163 0.00908 0.00822 0.00118 0.00000 0.00000 0. 02011 WSW 0.00128 0.00146 0.00163 0.00208 0.00035 0.00000 0.00680 w 0. 00114 0.00180 0.00073 0.00052 0.00035 0.00003 0.00458 WNW 0.00125 0.00170 0.00194 0.00087 0.00007 0.00000 0.00583 NW 0.00069 0.00118 0.00062 0.00024 0.00000 0.00000 0.00274 NNW 0.00055 0.00035 0.00024 0.00003 0.00000 0.00000 0.00118 TOTAL: 0.01858 0.03998 0. 0*2614 0.00787 0.00080 0.00003 0.09341

  • The total percentage of calms for this stability is 0.00003.

TABLE 2.E-15 ANNUAL AVERAGE JOINT FREQUENCY DISTRIBUTION OF WIND SPEED AND DIRECTION STABILITY CLASS D*

(NFCS, August 1, 1972 - July 31, 1973)

Direction Wind Seeed, knots 0 - 3 4 - 6 7 - 10 11 - 16 17 - 21 > 21 Total N 0.00414 0.00718 0.00368 0.00097 0.00000 0.00000 0.01596 NNE 0.00438 0.01172 0.00985 0.00298 0.00000 0.00000 0.02893 NE 0.00431 0~01540 0.01921 0.00371 0.00021 0.00000 0.04283 ENE 0.00320 0.00808 0.01137 0.00347 0.00000 0.00000 0.02612 E 0.00358 0.00714 0.00520 0.00107 0.00000 0.00000 0.01700

.rn N

ESE 0.00383 0.00635 0.00444 0.00052 0.00000 0.00000 0.01513 8

....a SE 0.00559 0.01186 . 0. 00659 0.00062 0.00000 0.00000 0.02466 u,

SSE 0.00639 0.01293 0.00479 0.00007 0.00000 0.00000 0.. 02418 s 0.00813 0.00714 0.00094 0.00003 0.00000 0.00000 0.01624 SSW 0. 00719 0.00759 0.00083 0.00000 0.00000 0.00000 0.01561 SW 0.00653 0.01553 0.00517 0.00038 0.00000 0.00000 0.02761 WSW 0.00480 0.01203 0.01356 0.00777 0.00055 0.00003 0.03874 w 0.00438 0.01512 0.02243 0.01130 0.00111 0.00003 0.05438 WNW 0.00490 0.01633 o. 00971 0.00368 0.00007 0.00000 0.03469 NW 0.00563 0.01186 0.00648 0.00087 . 0. 00000 0.00000 0.02484 NNW 0.00521 0.00888 0.00354 0.00021 0.00000 0.00000 0.01783 TOTAL: 0.08218 0.17514 0. 12777 0.03768 0.00194 0.00007 0.42475

  • The total percentage of calms for this stability is 0.00239.

TABLE 2.E-16 ANNUAL AVERAGE JOINT FREQUENCY DISTRIBUTION OF WIND SPEED AND DIRECTION STABILITY CLASS E*

(NFCS, August l, 1972 - July 31, 1973)

Direction Wind Seeed, knots 0 - 3 4 - 6 7 - l0 11 - 16 17 - 21 > 21 Total N 0.00397 0.00076 0.00003 0.00000 0.00000 0.00000 0.00467 NNE 0.00474 0.00225 0.00021 0.00000 0.00000 0.00000 0.00720 NE 0.00439 0.00673 0. 00201 0.00010 0.00000 0.00000 0.01323 ENE 0.00439 0. 01099 0.01054 0.00153 0.00000 0.00000 0.02745 E 0.00502 0.01186 0.00974 0. 00125. 0.00003 0.00000 0.02790

.N

. l'T1 ESE 0.00356 0.00915 0.00416 0.00049 0~00000 0.00000 0.01736 I

__, SE 0.00727 0.00687 0.00212 0!00042 0.00000 0.00000 0.01667

. °' SSE 0.00816 0.00163 0.00018 0.00000 0.00000 0.00000 0.00789 s 0.00477 0.00038 0.00000 0.00000 0.00000 0.00000 0.00516 SSW 0.00384 0.00073 0.00003 0.00000 0.00000 0.00000 0.00460 SW 0.00529 0. 00135 0.00000 0.00003 0.00000 0.00000 0.00668 WSW 0.00495 0.00340 0.00010 .0.00003 0.00000 0.00000 0.00848 w 0.00543 0.00431 0.00000 0.00000 0.00000 0.00000 0.00956 WNW 0.005-54 0.00322 0.00010 0.00000 0.00000 0.00000 0.00887 NW 0.00512 0.00125 0.00007 0.00000 0.00000 0.00000 0.00644 NNW 0.00487 0. 00104 0.00000 0.00000 0.00000 0.00000 0.00571 TOTAL: 0.07398 0.06574 0.02923 0.00385. 0.00003 0.00000 0.17784

  • The total percentage of calms for this stability is 0.00589.

TABLE 2.E-17 ANNUAL AVERAGE JOINT FREQUENCY DISTRIBUTION OF WIND SPEED AND DIRECTION STABILITY CLASS~

(NFCS, August 1, 1972 - July 31, 1973)

Direction Wind Seeed, knots 0 - 3 4 ~ 6 7 - 10 11 "."' 16 17 - 21 > 21 Total N 0.00532 0.00003 0.00000 0.00000 0.00000 0.00000 0.00536 NNE 0.00643 0.00052 0.00000 0.00000 0.00000 0.00000 0.00695 NE 0.00907 0.00274 0.00007 0.00000 0.00000 0.00000 0. 01188 ENE 0.00886 0.00343 0.00010 0.00000 0.00000 0.00000 0.01240 E 0.01101 0.00593 0.00042 0.00000 0.00000 0.00000 0.01735 N

. rr, ESE 0.01052 0.00385 0.00010 0.00000 0.00000 0.00000 0.01448 I*

SE 0.00872 0.00135 0.00003 0.00000 0.00000 0.00000 0.01011 SSE 0.00650 0.00017 0.00000 0.00000 0.00000 0.00000 0.00667 s 0.00595 0.00007 0.00000 0.00000 0.00000 0.00000 0.00602 SSW 0.00626 0.00024 0.00010 0.00000 0.00000 0.00000 0.00681 SW 0.01129 0.00458 0.00055 0. 00014 - 0.00003 0.00000 0.01659 WSW 0 .* 01139 0.00170 0.00076

  • 0.00;003 0.00000 0.00000 0.01389 w 0.00997 0.00208 0.00031 0.00000 0.00000 0.00000 0.01236 WNW 0.00931 0.00087 0.00000 0.00000 0.00000 0.00000 0.01018 NW 0.00709 0.00038 0.00000 0.00000 0.00000 0.00000 0.00747 0.00570 0.00055 0.00000 0.00000 0.00000 0.00000 0.00626 TOTAL: 0.13339 0.02850 0.00248 0. 00017 0.00003 0.00000 0.16457
  • The total percentage of calms for this stability is 0.02913.

TABLE 2.E-18 ANNUAL AVERAGE JOINT FREQ_UENCY DISTRIBUTION OF WIND SPEED AND DIRECTION STABILITY CLASS G*

(NFCS, August l, 1972 - July 31, 1973)

Direction Wind Seeed, knots 0 - 3 4 - 6 7 - 10 11 - 16 17 - 21 > 21 Total N 0.00431 0.00000 0.00000 0.00000 0.00000 0.00000 0.00431 NNE 0.00528 0.00003 0.00000 0.00000 0.00000 0.00000 0.00532 NE 0.00740 0.00014 0.00000 0.00000 0.00000 0.00000 0.00753 ENE 0.00934 0.00055 0.00000 0.00000 0.00000 0.00000 0.00989 E 0.00951 0.00125 0.00021 0.00000 0.00000 0.00000 0.01097 N

rr, ESE 0.00736 0.00049 0.00014 0.00000 0.00000 0.00000 0.00799 I

.....a co SE 0.00577 0.00052 0.00010 0.00000 0.00000 0.00000 0.00639 SSE 0.00443 0.00024 0.00003 0.00000 0.00000 0.00000 0.00476 s 0.00424 0.00003 0.00003 0.00000 0.00000 0.00000 0.00431 SSW 0.00528 0.00010 0.00000 0.00000 0.00000 0.00000 0.00538 SW 0.01596 0.00336 0. 00121 0.00021 0 . 00000 0.00000 0.02075 WSW 0.01253 0.00198 0.00212 0.00017 0.00000 0.00000 0.01679 w 0.00996 0.00090 , 0. 00017 0.00003 0.00000 0.00000 0.01107 WNW 0.00639 0.00014 0.00000 0.00000 0.00000 0.00000 0.00653 NW 0.00434 0.00007 0.00000 0.00000 0.00000 0.00000 0.00441 NNW o. 00431 0.00000 0.00000 0.00000 0.00000 0.00000 0.00431 TOTAL: 0. 11647 0.00981 0.00402 0.00042 0.00000 0.00000 0.13072

  • The total percentage of calms for this stability is 0.05121.

TABLE 2.E-19 RELATIVE FREQUENCY OF OCCURENCES OF VARIOUS STABILITY CLASSES (NFCS, August 1, 1972 - July 31, 1973)

Stabilitt Classes A B C D E F G Total Winter 0.00184 0.00711 0.08271 0.47797 0.16739 0. 14972 0. 11326 1.00000 Spring 0.00015 0.00485 0.13647 0.43544 0. 18794 0. 15162 0.08353 1.00000 Summer 0.02004 0.00635 0.0726 0.30754 0. 14405 0.22440 0.22500 l. 00000

.rn N

I

--a 1..0 Fall 0.00000 0.00163 0.09680 0.47308 0.17342 0.13844 0.11664 1.00000 Annual 0.00405 0.00465 0.09341 0.42475 o. 17784 0.16457 0.13072 0.99999

TABLE 2.E-20 SHORT-TERM METEOROLOGICAL DATA*

A. Maximum Hourly Persistence of Individual Stability Classes:

50 Foot Leve 1 Stability G 12 Hours Stability F 7 Hours Stability E 6 Hours Stability D 20 Hours Stability C 8 Hours Stability B 3 Hours Stability A 4 Hours B. Maximum Frequency of Wind in any Sector:

50 Foot Level Frequency 9.24%

From the Southwest C. Maximum Hourly Persistence of Wind in Any Sector:

50- Foot Level Duration 20 Hours From the West D. Total Frequency Distribution of Stability Classes:

50 Foot Level Type G 13.07%

Type F 4.54%

Type E 17. 78%

Type D 42*.48%

Type C 9.34%

Type B 0.46%

Type A 0.40%

  • Data collected at NFCS from the meteorol_ogica 1 tower during the period of August 1, 1972 through July 31, 1973.

2.E-20

N PERCENT w E s

0-3 4-6 7-10 11-16 17-21 >21 WIND IN KNOTS Figure 2.E-1. Annual Wind Rose From NFCS, August 1, 1972 -

July 31, 1973.

2.E-21

SHORT-TERM (ACCIDENT) DIFFUSION ESTIMATES CALCULATIONS Atmospheric dilution factors (x/Q) applicable to discrete time intervals up to 30 days following the postulated release were estimated for downwind distances as far as 20 miles from the reactor plant and are presented in Table 2.E-21. The time intervals selected for this analysis were the same four periods specified in AEC Regulatory Guide No. 1.4( 6 ): 0 to 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, 8 to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, 1 to 4 days and 4 to 30 days. Data obtained from the meteorological tower on the site were utilized to define climatological parameters representing conservative dispersion conditions based on measured persistence data on wind direction and atmospheric stability.

Persistence and frequency data for the period August 1, 1972 through July 31, 1973 were selected for this purpose since that particular period of record provided the latest available data. The wind speed used in these analyses was the median wind speed at the 50-foot level.

A summary of assumptions for the short-term accident estimates is pre-sented in Table 2.E-22.

2.E-22

TABLE 2.E-21 ATMOSPHERIC DILUTION FACTORS x/Q FOR ACCIDENT CONDITIONS*

Data in sec/m 3 Distance Hours Days In Miles 0.8** 8-24 1-4 4-30

. -4 o.on* 4.539 X 10~

2 4.55 X 10 -3 1. 940 X 10- 3 . 2. 320 X 10

0. 1 1.255 X 10-2' 3.429 X 10-3 1.479 X 10- 3 , 1. 802 X 10- 4 0.2 3.760 X 10

. -3 l.099xl0- 3

  • 4.190 X 10- 4 5.538 X 10- 5

.rn N

2.662 X 10- 5 I 0. 3 1.916 X 10- 3 5.287 X 10-4 2.020 X 10- 4 4 8.290 X 10- 5 1.089 X 10- 5 N

w

0. 5 8.400' X 10- 4 2.163 X 10-

.568 . 7. 71 X 10- 4 1.816 X 10- 4 6.910 X 10- 5 8.880 X 10- 6

o. 7
  • 5.74 X 10- 4 1.251 X 10- 4 4 . 798 X 10- S , 6.273 X 10- 6 1.0 4.23 X 10- 4 ; 6.926 X 10-S 2.655 X 10-S 3. 467 X 10- 6 2.0 2.07 X 10- 4 i 2.329 X 10-S 8.790 X 10- 6 1.149 X 10- 6 s.o* 7.48 X 10- 5 6.146 X 10- 6 2 .. 310 X 10- 6 j 3.171 X 10-?

10.0 3.28 X 10

-5 2.314 X .10 -6 8.,670 X 10-] 1.101 X 10- 7 20.0 1. 509 X 10-S 9.351 X 10- 7 3 . 488 x *. l o- 7 4.378 X 10- 8 \

  • Data taken at NFCS from August 1, 1972 through July 31, 1973
    • Includes building wake factors given in Table 2.6-24 t Exclusion Distance Ul4 Mor 374 Feet)

TABLE 2.E-22

SUMMARY

OF ASSUMPTIONS FOR SHORT-TERM (ACCIDENT) x/Q ESTIMATES Pasquill Median Joint Stability Frequency Wind Speed Frequency Period Class Percent {m/sec) Wind Condition Percent 0-8 Hou-rs Extremely Stable 100 0.87 Steady 100 8-24 Hours Extremely Stable 25 0.87 Uniformly Averaged Over 22.5° Sector with 100% Frequency 25 Very Stable 44 0.95 44 Moderately Stable 31 1. 90 31 N

rr, 1-4 days Extremely Stable 26 0.87 Unifonnly Averaged N

I Over 22.5° Sector

.,:::.,. with 50% Frequency 13 Very Stable 17 0.95 9 Moderately Stable 13 1.90 6 Neutral 44 2.55 22 4-30 Days Extremely Stable 13. 07 0.87 Unifonnly Averaged Over 22.5° Sector with 9.24% Frequency 1. 21 Very Stable 16.46 0.95 1. 52 Moderately Stable 17.78 1.90 1.64 Neutral 42.48 2.55 3.93 Slightly Unstable 9.34 2.47 . 0.86 Moderately Unstable ._. o:46 2. 14 0.04 Extremely Unstable 0.40 2.03 0.04

Calculation of atmospheric dilution factors was performed using the Gaussian diffusion equation for ground level concentration from a continuously emitting source released at ground level:

1 2 2 (1) x/Q =nu o o exp -1/2 (y /oy )

y z where, ~

x = Activity co~centration, curies/m3 Q = Activity release rate, curies/sec u = Mean wind speed, meters/sec y = Crosswind distance, meters a = Crosswind dispersion parameter, meters y

  • o = Vertical dispersion parameter, meters 2

The dispersinn parameters o and o were evaluated in accordance with the Pasquill-Gifford curves(?) ~xcept ~or stability class G which was obtained from the AEC Licensing Staff, Site Analysis Branch, Directorate of Licen-sing. (S)

Atmospheric dispersion models and assumptions employed for each of the post-release time intervals are described in more detail below.

Time Interval: 0 to 8 Hours A review of the record revealed that extremely stable diffusion condi-tions have persisted for a maximum of 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />s: therefore, atmospheric dispersion during the first 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> following a postulated release was assumed to proceed under extremely stable (Pasquill Type G) diffusion conditions.

It was further assumed that the wind was steady (constant direction) over the entire period.

2.E-25

Atmospheric dilution factors for this time interval consisted of center-line concentrations from a ground level release based on the Gaussian diffusion equation:

x/Q = _1_ _

n U E E y z The effect of turbulent wake on the distribution of airborne activity in the vicinity of the reactor building was taken into account by making the following corrections to the dispersion parameters:

(3)

E z = (a z2 + CA/n) 112 substituting for z:Y and z: 2 from equation (3),

X = _ _l __ e W (4)

Q n u ay a z where is a reduction factor due to the effect of turbulent wake in the vicinity I

of the reactor building. Reduction factors for F and G stabilities are computed for downwind distances up to 20 miles and are presented in Table 2.E-23.

C = 2.0 and A is the minimum cross-sectional area of the reactor building in accordance with AEC Regulatory Guide 1.4. The area of the reactor containment, 506 square meters, was used for this purpose. A maximum reduction factor of 3, in accordance with AEC Regulatory Guide 1.4, was used to correct the x/Q values although the wake correction model did yield higher values at close-in distances.

2.E-26

TABLE 2.E-23 BUILDING WAKE EFFECT ON x/Q VALUES Reduction Reduction Reduction Factor Factor Factor Type F Type G Type G Miles (50%) (95%) (0-8 Hours) 0.1 0.33 0.33 0.33 0.2 0.33 0.33 0.33

0. 3 0.33 0.33 0.33 0,5 0.47 0.33 0.33 0.7 0.58 0.37 0.37 1.0 0.69 0.49 0.49 2.0 0.82 0.68 0.68 5.0 0.92 0.82 0.82 1 o. 0 0.95 0.88 0.88 20.0 0.97 0.92 0.92 2.E-27

Time Interval: 8 to 24 Hours Stability conditions determining atmospheric dispersion during this time interval were also derived from the stability persistence data of the site. In this instance, the portion of the maximum persistence for the Extremely Stable diffusion class (12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />) not accounted for in the prior Oto 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> time interval was applied to this post-release period (4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />). For the balance of the time remaining in this interval (12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />) it was assumed that diffusion conditions shifted to the next most stable class in the Pasquill-Gifford stability classification scheme until the time period contained the appropriate number of hours.

It was further assumed that the wind remained in a single 22.5 degree sector but meandered uniformly over this sector. The time averaged atmos-pheric dilution factor for a wind that meanders uniformly without a single 22.5 degree sector for a mixture of stability and wind speed conditions was calculated from the equation:

(5)

where, x = Activity concentration, curies/m 3 Q = Activity release rate, curies/sec F(e,s,j) = The frequency during the period of interest that the wind is from the direction e, for the stability conditions and wind speed class j o s = The vertical dispersion parameter evaluated at the 2

distance x for the stability conditions, meters u.J = The representative wind speed for class f, meters/sec x = Distance downwind, meters.

2.E-28

Time Interval: 1 to 4 Days A sufficient time lapse occurs during this interval that a recurrence of the prolonged stability conditions which wer~ assumed to have taken place in the two earlier time periods is considered to be feasible. It was, therefore, postulated that diffusion conditions in the 1 to 4 days inter-val following a postulated release would comprise Extremely Stable (Pas-quill G), Very Stable (Pasquill F), Moderately Stable (Pasquill E) and Neutral (Pasquill D) conditions with the same relative distribution as the maximum hourly persistence data of the site during the period August l, 1972 through July 31, 1973. The sum of the hours of maximum persistence for these four stability categories is 45 hours5.208333e-4 days <br />0.0125 hours <br />7.440476e-5 weeks <br />1.71225e-5 months <br />. Accordingly, it was assumed that the frequency of the Extremely Stable condition (which lasted a maximum of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />) during this time interval would be 26 per-cent (12/45). Corresponding frequencies used for the Very Stable, Mo-derately Stable and Neutral conditions were 17 percent, lJ percent and 44 percent, resp~ctively.

On the basis that the maximum hourly persistence of wind from any direc-tion was 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> and that the maximum frequency on a monthly basis was approximately 42 percent (12.6 days equivalent), a wind direction fre-quency of 50 percent (6.3 days equivalent) was assumed for tMs time fn~

terval.

Calculation of atmospheric dilution factors was accomplished with the same basic expression used for obtaining the time-averaged factor in the 8 to 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> time interval.

2.E-29

Time Interval: 4 to 30 Days The distribution of atmospheric stability and wind direction frequencies for this extended time interval was derived from frequency data. The maximum frequency of wind in a single sector over the period was ap-proximately 9 percent. Distribution of atmospheric stability conditions used for this time period was based on the Site record of August 1, 1972 to July 31, 1973. The time-averaged expression for ground level concen-tration was used to obtain estimated values of atmospheric dilution factors.

LONG-TERM (ROUTINE) DIFFUSION ESTIMATES x/Q ESTIMATES Estimates of atmospheric dilution factors (x/Q) for seasonal releases at downwind distances up to 50 miles in 16 compass directions for the 50-foot level are presented in Tables 2.E~24 through 2.E-27. On a seasonal basis

~he southern sectors experience the lowest ground level concentration in winter and spring, while the sector with the highest concentration is the western sector. In summer, the lowest concentration occurs in the southern sector and highest in the N-E sector. In fall, the lowest concentrations occur in the northern sector and highest in the S-W sector.

2.E-30

TABLE 2.E-24 ESTIMATES OF ATMOSPHERIC DILUTION FACTORS FOR NFCS WINTER AVERAGE x/Q VALUES Sec/m3 gistance Direction From Plant Location ownwind

~ N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW

.07-,, 2.48E-4 Q.1 1.21£..;4 1.32E:-4 1. 76E-4 1. 62E-4 1.50E-4 l .53E-4 1.2lE-4 1.14E-4 1.04E-4 1. 14E-4 l.42E-4 l.S0E-4 2.03E-4 1. 56E-4 1. 36E-4 l .07E-4 0.2 3.48E-5 3. 77E-5 5. 03E-5 4.64E-5 4.29E-5 4.40E-5 3.48E-5 3. 30E-5 3.01E-5 3.29E-5 4. l0E-5

  • 5.23E-5 5; 90E-5 4. 54E-5 3.94E-5 3. 0SE-5 0.3 1.69E-5 1.82E-5 2.43E-5 2,25E-5 2.0SE-5 2.14E-5 1,69E-5 l.60E-5 1.46E-5 l .60E-5 1.99E-5 2.54E-5 2.87E-5 2.21E-5 l. 92E-5 1. 50E-5 0.5 6.87E-6 7 .38E-6 7. 38E-6 9.82E.-6 8.46E-6 8.68E-6 6.88E-6 6.54E-6 5.95E-6 6.49E-6 8.06E-6 1.03E-5 1.17E-5 9.0lE .. 6 7 .82E-6 6.11E-6 0.8 3.05E-6 3.27E-6 4.36E-6 4.07E-6 3.76E-6 3.86E-6 3.06E-6 2.91E-6 2.65E-6 2.88E-6 3.59E-6 4.60E-6 5.21E-6 4.02E-6 3.48E-6 2. 72E-6 1.0 2. l0E-6 2.25E-6 3.00E-6 2.80E,-6 2.59E-6 2.66E-6 2.llE-6 2.01 E-6 1.83E-6 l .99E-6 2.47E-6 3.17E-6 3. 59E-6 2. 77E-6 2.40E-6 1.87E-6 1.5 1.09E-6 1.17E-6 1.56E-6 1.46E-6 1.35E-6 1.38E-6 1.09E-6 1.04E-6 9.52E-7
  • 1.03E-6 1.29E-6 1.66E-6 1.88E-6 1.45E-6 1.25E-6 9. 76E-7 2.5 4.94E-7 5.28E-7 7 .06E-7 6.64E-7 6.11E-7 6.27E-6 4.96E-7 4.75E-7 4.33E-7 4.68E-7 5.87E-7 7.61E-7 8. 61 E-7 6.64E-7 5.72E-7 4.44E-7

.N rr, 3.5 4.5

2. 97E-7 2.05£-7 7.5 9,S0E-8 3.17E-7 2.18£-7 1.05E-7 4.25E-7 2.93E-7 1.41E-7 4.0lE-7 2.77E-7
1. 33E-7 3.68E-7 2.54E-7 1.22E-7
3. 78E-7 2.61E-7 2.98E-7 2.05E-7 2.86E-7 1.97E-7
2. 61 E-7 1.80£-7 2.82E-7 1.94E-7 3,55E-7 2.45E-7 4.62E-7 3.20E-7 5.22E-7 3 *. 62E-7 4.03E-7 2.79E-7 3.46E-7 2.39E-7 2.68E-7 1.85E-7 8 1.25E-7 9.79E-8 9.47E-8 8.68E-8 9 *.32E-8 l. 19E-7 1.56E-7 1, 76E-7 1.36E-7 1.16E-7 8.91E-8 w

...... 10.0 6,53E-8 6.97E-8 9.40E-8 8.90E-8 8.13£-8 8.34E-8 6.51E-8 6.32£-8 5.80E-8 6.22E-8 7.96£-8 1.05E-7 1.19£-7 9.12E-8 7. 76E-8 5.96E-8 15.0 3,59E-8 3.81E-8 5.14E-8 4.90E-8 4.47E-8 4.58E-8 3.58E-8 3.47E-8 3.19E-8 3.41E-8 4,36E-8 5. 79E-8 6.54E-8 5.02E-8 4. 27E-8 3.29E-8 20.0 2.50E-8 2.67E-8 3.62E-8 3.43E-8 3.21E-8 3.19E-8 2.47E,-8 2.42E-8 2.23E-8 2.39E-8 3.09E-8 4. l4E-8 4 *.66E-8 3.56£-8 3.0lE-8 2.29E-8 25.0 1,89E-8 2.03E-8 2. 77E-8 2.61E-8 2.37E-8 2.42£-8 1.86E-8 1.84E-8 1.70E-8 1.82E-8 2.38E-8 3.20E-8 3.60E-8 2. 74E-8 2.30E-8 1.73E-8 30.0 1. 50E-8 1.63E-8 2.22E-8 2.09E-8 l .90E-8 1.93E-8 1.48E-8 1.47E-8 1.36E-8 1.45E-8 1.92E-8 2.60E-8 2. 91E-8 2.21E-8 1.84E-8 1. 38E-8 35.0 l.24E-8 1.35E-8 l.85E-8 1.73E-8 1.57E-8 1.60E-8 1.22E-8 1.21E-8 1, 13E-8 1.21E-8 1.60E-8 2.18E-8 2.44E-8 1.84E-8 1.53E-8 1.14E-8 40.0 1.0SE-8 1.15E-8

  • 1.58E-8 1.47E-8 1.34E-8 l.36E-8 1.03E-8 1.03E-8 9.59E-9 1.03E-8 1,37E-8 1.87E-8 2.09E-8 1.58E-8 1.31E-8 9. 69E-9 45.0 9. lOE-9 1.00E-8 1.37E-8 1.28E-8 1.16E-8 1. 18E-8 8.89E-9 8.95E-9 8.32£-9 8.91E-9 1.20E-8 1,63E-8 1. 83E-8 1.38E-8 1.14E-8 8.39£-9 50.0 8.00E-9 8,83E-9 1.21E-8 1, 13E-8 1.02E-8 1.04E*8 7 .80E-9 7 .87E-9 7 .33E-9 7 .85E-9 1.06E-8 1.45E-8 1,62E-8 1.22E-8 1.00E-8 7.38E-9

,568 6,5.lE-6

  • Exclusion Distance (374 feet)

TABLE 2.E-25 ESTIMATES OF ATMOSPHERIC DILUTION FACTORS FOR NFCS SPRING AVERAGE x/Q VALUES 3

Data in Sec/m Distance Direction From Plant Location Downwind

!iikL.... N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW

.07* l.83E-4 0.1 1. 04E-4 1. l SE-4 1. 28E-4 l; 29E-4 l .46E-4 l. lSE-4 9. l 3E-5 7. 26E-5 6.32E-5 8. ?2E-5 l .12E-4 l .49E-4 2.02E-4 1. 76E-4 l .63E-4 l .18E-4 0.2 2. 96E-5 3. 27E-5 3,64E-5 3.68E-5 4.19E-5 3.31E-5 2. 64E-5 2.l0E-5 1.83E-5 2.47E-5 3. 24E-5 4.32E-5 5. 86E-5 5.11 E-5 4.71E-5 3. 38E-5 0.3 1. 43E-5 1. 58E-5 1. 76E-5 1. 78E-5 2.03E-5 1. 61 E-5 l .28E-5 1.02E-5 8.90E-6 l. 20E-5 1.58E-5 2.l0E-5 2.86E-5 2.49E-5 2.30E-5 1.64E-5 0.5 5. 78E-6 6.36E-6 7. llE-6 7. 24E-6 8. 25E-6 6.55E-6 5.22E-6 4.16E-6 3.62E-6 4.88E-6 6.41E-6 8. 56E-6 1. 17E-5 1. 02E-5 9. 39E-6 6.68E-6 0.8 2.SSE-6 2.80E-6 3.14E-6 3.21E-6 3.67E-6 2. 91 E-6 2. 32E-6 l.85E-6 1.61E-6 2.18E-6 2.86E-6 3. 82E-6 5.20E-6 4.54E-6 4.18E-6 2.97E-7 1.0 l. 75E-6 1. 92E-6 2. lSE-6 2. 21 E-6 2. 53E-6 2.0lE-6 1.60E-6 1.28E-6 1. 11 E-6 1. S0E-6

  • 1. 97E-6 2. 63E-6 3. 59E-6 3. 13E-6 2.88E-6 2.04E-7 1.5 9.0lE-7 9.88E-7 1.11E-6 1.15E-6 1. 31 E-6 1.04E-6 8.34E-7 6.65E-7 5.80E-7 7 .84E-7 1 ;o3E-6 1.38E-6 1.87E-6 1.63E-6 1.50E-6 l .06E-6 2.5 4.03E-7 4.42E-7 5.00E-7 5. 19E-7 5.95E-7 4. 74E-7 3.80E-7 3.02E-7 2.56E-7 3.59E-7 4. 71 E-7 6. 30E-7 8. 58E-7 7.46E-7 6.80E-7 4. 79E-7 3.5 2.41E-7 2.64E-7 3.00E-7 3.12E-7 3.58E-7 2.86E-7 2.29E-7 l .82E-7 1.60E-7 2.17E-7 2.85E-7 3.83E-7 5.21E-7 4.52E-7 4. l0E-7 2.87E-7 N

ITT 4.5 7.5 1.65E-7

7. 78E-8 1.81E-7 8.58E-8 2.05E-7
9. 75E-8 2.15E-7 1.02E-7 2.46E-7 1.18E-7
1. 98E-7 9.49E-8
1. 58E-7
7. 59E-8
1. 26E-7 6.05E-8 1.11 E07 5.35E-8
1. 51 E-7 7 .31E-8
1. 98E-7 9.60E-8
2. 65E-7 1.29E-7 3.61E-7 1.15E-7 3.12E-7 1.51E-7 2.82E-7
1. 35E-7
1. 97E-7
3. 38E-8 I 10.0 5.14E.;.8 5.69E-8 6.47E-8 6.80E-8 7 .83E-8 6.34E-8 5.07E-8 4.04E-8 3.59E-8 4.91E-8 6.46E-8 8.68E-8 1.18E-7 1.0lE-7 8. 99E-8 6.22E-8 w 15.0 2.81E-8 3.11E-8 3.55E-8 3.74E-8 4.29E-8 3.49E-8 2. 78E-8 2.22E-8 1. 97E-8 2.70E-8 3.55E-8 4. 78E-8 6.51E-8 5.59E-8 4,97E-8' 3.41E-8 N

20.0 1. 93E-8 2.15E-8 2.44E-8 2. 58E-8 2. 98E-8 2.44E-8 l. 94E-8 1. 55E-8 1. 39E-8 1.9.E-8 2. 52E-8 3.40E-8 4.58E-8 3.90E-8 3.42E-8 2. 34E-8 25.0 1.45E-8 l .63E-8 1.84E-8 l .94E-8 2.25E-8 1.85E-8 1.47E-8 1.18E-8 l .07E-8 1.47E-8 1.94E-8 2.61E-8 3.50E-8 2. 95E-8 2.56E-8 1. 76E-8 30.0 1. 15E-8 1. 29E-8 1.46E-8 1. 94E-8 1. 79E-8 1.48E-8 1. 18E-8 9.43E-9 8. 58E-9 1.19E-8 1.57E-8 2.11E-8 2.81E-8 2.36E-8 2.03E-8 1.40E-8 35.0 9.48E-9 1.07E-8 1. 20E-8 1.27E-8 1.48E-8 1. 23E-8 9. 76E-9 7 .82E-9 7.15E-9 9.91E-9 1.31E-8 1. 76E-8 2.34E-8 1.95E-8 1.67E-8 1.15E-8 40.0 8.0lE-9 0. 96E-9 1.02E-8 1.08E-8 1.26E-8 1.04E-8 8. 30E-9 6.65E-9 6. l0E-9 8.48E-9 1.12E-8 1.51E-8 1.99E-8 1 '.66E-8 1.41E-8 9.71E-9 45.0 6.91E-9 7.84E-9 8. 77E-9 9.29E-9 l .09E-8 9.0SE-9 5.76E-9 5. 76E-9 5.31E-9 7 .39E-9 9.78E-9 1.31E-8 1. 73E-8 1.43E-8 1.21E-8 8.38E-9 50.0 6.06E-9 6.89E-9 7 .69E*-9 8. lSE-9 9. 54E-9 7. 97E-9 6. 33E-9 5.0SE-9 1. 53E-8 1.26E-8 1.06E-8 7. 34E-9

" .568 5.40E-6

4. 70E-9 6. 54E-9 8.66E-9 l. l6E-9
  • Exclusion Distance (374 feet)
    • ~

(,

TABLE 2.E-26 ESTIMATES OF ATMOSPHERIC DILUTION FACTORS FOR NFCS SUMMER AVERAGE x/Q VALUES 3

Data in Sec/m Distance Downwind Direction from .Plant Location Miles N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW

.07* 2.15E-4 0.1 8. 16E-5 l .04E-5 l. 53E-4 l. 76E-4 l .59E-4 l .61E-4 9.94E-5 9.58E-5 9.70E-5 l. 54E-4 2 .40E-4 2 .02E-4 1. 63E-4 l.l9E-4 l. 09E-4 9.66E-5 0.2 2. 33E-5 2. 97E-5 4. 38E-5 5. 08E-5 4.57E-5 4.64E-5 2.86E-5 2. 76E-5 2.80E-'5 4.44E-5 6. 91E-5 5.84E-5 4. 76E-5 3.47E-5 3.16E-5 2. 79E-5 0.3 l .12E-5 1.43E-5 2.11E-5 2. 46E-5 2. 22E-5 2.26E-5 1.39E-5 1. 34E-5 1.36E-5 2.16E-5 3. 36E-5 2.84E-5 2.31E-5 l .69E-5 1. 53E-5 1, 35E-5 0.5 4.54E-6 5. 77E-6 8.54E-6 9.95E-6 9.0lE-6 9.18E-6 5.66E-6 5.48E-6 5. 55E-6 8.82E-6 l .37E-6 1.16E-6 9.42E-6 6.87E-6 6.24E-6 5.51E-6 0.8 2.0lE-6 2.55E-6 3. 79E-6 4.43E-6 4.0lE-6 4.09E-6 2.52E-6 2.44E-6 2/47E-6 3.93E-6 6.09E-6 5.15E-6 4,20E-6 3.07E-6 2. 78E-6 2.46E-6 1.0 1.38E-6 1. 7SE-6 2.61E-6 3.06E-6 2. 76E-6 2.82E-6 1. 73E-6 l .68E-6 1.70E-6 2.71E-6 4.20E-6 3.56E-6 2.90E-'7 2.12E-6 1. 92E-6 1. 69E-6 1.5 7.13E-7 9.09E-7 1.36E-6 1.60E-6 1.44E-6 1.47E-6 9.01E-7 8.76E-7 8.87E-7 1.41E-6 2.19E-6 1.86E-6 1. 52E-6 l.11E-6 1.00E-6 8.83E-7 2.5 3.22E-7 4. 12E-7 6.18E-7 7.35E-7 6.66E-7 6.67E-7 4.08E-7 3.98E-7 4.03E-7 6.38E-7 9.93E-7 8.51E-7 6. 98E-7 S.09E-7 4.59E-7 4.03E-7 3.5 1.93E-7 2.48E-7 3. 74E-7 4.47E-7 3. 96E-7 4.03E.;7 2.46E-7 2.40E-7 2. 54E-7 3.84E-7 6.00E-7 5. 16E-7 4. 24E-7 3, l0E-7 2. 78E-7 2.43E-7 4.5 1.33E-7 1.71E-7 2.SBE-7 3. l0E-7 2.73E-7 2. 78E-7 1.69E-7 1.65E-7 1.68E-7 2.64E-7 4.13E-7 3.57E-7 2.95E-7 2. 15E-7 1. 92E-7 1.68E-7 N 1.44E-7 1.05E-7 9.34E-8 8.12E-8 7 .5 6.33E-8 8.26E-8 1.25E-7 1.52E-7 1. 32E-7 1.34E-7 8.0BE-8 7 .93E-8 8.06E-8; 1.26E-7 l .98E-7 1. 74E-7

  • l"Tl 10.0 4.22E-8 S.54E-8 8.42E-8 l.03E-7 8.81E-8 8.94E-8 S.38E-8 5.28E-8 5.38E-8 8.40E-8 l.32E-8 1. l 7E-7 9. 71E-8 7.09E-8 6.28E-8 5.44E-8 I

w 15.0 2.30E-8 3.02E-8 4.60E-8 S.63E-8 4.84E-8 4.91E-8 2.95E-8 2.90E-8 2.95E-8 4.62E-8 7 .26E-8 6. 43E-8 5. 34E-8 3.90E-8 3.43E-8 2.99E-8 w 20.0 1.61E-8 2. 16E-8 3.29E-:-8 4.07E-8 3.40E-8 3.44E-8 2.* 04E-8 2.02E-8 2.06E-8 3. 19E-8 5.05E-8 4.57E-8 3.83E-8 2.80E-8 2.4SE-8 2. l0E-8 25.0 1.23E-8 1.67E-8 2.54E-8 3.17E-8 2.59E-8 2.62E-8 1.54E-8 1.53E-8 1.57E-8 2.40E-8 3.82E-8 3. 52E-8 2.96E-8 2.17E-8 1.89E-8 1.60E-8 30.0 9.90E-8 1.35E-8 2.06E-8 2.59E-8 2.0BE-8 2. l0E-8 1.23E-8 1. 22E-8 1.25E-8 1.90E-8 3.05E-8 2.8SE-8 2.40E-8 1. 76E-8 1.52E-8 1.29E-8 35.0 8.23E-9 1. 13E..:8 1. 73E-8 2.18E-8 1. 73E-8 1.74E-8 1.0lE-8 1.0lE-8 1.04E-8 1.56E-8 2.52E-8 2. 38E-8 2.02E..;8 1.48E-8 1.27E-8 1.07E-8 40.0 7 .02E-9 9. 72E-9 1.49E-8 1.88E-8 1.48E-8 8.57E-8 8.57E-9 8.57E-9 8.82E-9 1. 32E-8 2.14E-8 2.04E-8 1. 73E-8 1.27E-8 1.09E-8 9. 14E-9 45.0 6.llE-9 a.S0E-9 1.30E-8 1.65E-8 1.28E-8 1.29E-8 7.41E,-9 7 .42E-9 7 .65E-9 1.14E-9 l.86E-8 1.78E-8 l .52E-8 1.11E-8 9.52E-9 7 .94E-9 50,0 5.39E-9 7.54E-9 1. 15E-8 1.47E-8 l .13E-8 1.13E-8 6.S0E-9 6.53E-9 6. 74E-9 1.00E-8 1.63E-8 1.58E-8 1.34E-9 9.86E-9 8.43E-9 7.0lE-9

,568 6,55E-6

  • Exclusion Distance (374 fee~)

TABLE 2. E-27 ESTIMATION OF ATMOSPHERIC DILUTION FACTORS FOR NFCS FALL AVERAGE x/Q VALUES 3

Data in Sec/m Distance Direction from Plant Location Downwind

~ N NNE NE ENE E ESE SE SSE s SSW SW WSW w WNW NW NNW

.07* 10.51E-4 0.1 l.15E-4 1. 16E-4 7.58E-4 4.97E-4 3.33E-4 l. lSE-4 1.0lE-4 7.93E-5 7 .27E-5 7. 93E-5 1.05E-4 1.18E-4 1. 45E-4 1. 23E-4 1.47E-4 l .29E-4 0.2 3.25E-5 3.29E-5 2.19E-4 1.43E-4 9.64E-5 3.39E-5 2.91E-5 2.29E-5 2. l0E-5 2.29E-5 3.02E-5 3.42E-5 4. 19#-5 3. 54E-5 4. 22E-5 3.69E-5 0.3 1. 57E-5 l. 59E-5 1.06E-4 6.94E-4 4.67E-5 1. 65E-5 l.42E-5 l. llE-5 l.02E-5 l. llE-5 1.47E-5 l .67E-5 2.04E-5 1. 72E-5 2. 0SE-5 1. 79E-5 o.s 6,33E-6 6.43E-6 4.27E-5 2.81E-5 l.89E-5 6.71E-6 5. 79E-6 4.53E-6 4.18E-6 4,51E-6 6.00E-6 6.SlE-7 8.36E-6 7.02E-6 8.37E-6 7 .28E-6 0.8 2.81E-6 2.85E-6 l .90E-5 1.25E-5 8.44E-6 2. 99E-6 2.58E-6 2.0ZE-6 1.86E-6 2.0lE-6 2 .67E-6 *3 .03E-6 3. 72E-6 3.12E-6 3.72E-6 3.23E-6 1.0 1.93E-6 1,95E-6 1.31E-5 8.65E-6 5.83E-6 2.06E-6 l .77E-6 1. 39E-6 1.28E-6 l .38E-6 1.84E-6 2.09E-6 2.56E-6 2.lSE-7 2. 56E-6 2.22E-6 1.5 9,95E-7 1. 01 E-6 6.88E-6 4.53E-6 3.0SE-6 1.07E-6 9.23E-7 7.22E-7 6. 70E-7 7.21E-7 9,55E-7 l.09E-6 1. 33E-6 1. 12E-6 1. 33E-6 1. lSE-6 2.5 4.48E-7 4.54E-7 3.17E-6 2.0SE-6 1.40E-6 4.85E-7 4. 19E-7 3.29E-7 3.06E-7 3.28E-7 4.34E-7 4.94E-7 6.06E-7 5.07E-7 6.00E-7 5.20E-7 3.5 2.68E-7 2. 72E-7 l .93E-6 l .27E-7 8. SSE-7 2. 92E-7 2.53E-7 1. 98E-7 l.85E-7 1. 98E-7 2.61E-7 2.98E-7 3.65E-7 3.0SE-7 3.61E-7 3.12E-7 4.5 l .84E-7 l.87E-7 1. 34E-6 8.81E-7 S.94E-7 2.0lE-7 1. 74E-7 1.37E-7 1.28E-7 1.37E-7 1.80E-7 2.06E-7 2. 52E-7 2. l0E-7 2. 48E-7 2.14E._7 N

fT1 7.5 8. 76E-8 8.87E-8 6.60E-7 4.32E-7 2.91E-7 9.63E-8 8.32E-8 6,58E-8 6.20E-8 6.57E-8 8.63E-8 9.85E-8 1.21E-7 1.00E-7 1. 18E-7 1.0lE-7 I 10.0 5.81E-8 5.88E-8 4.47E-7 2.93E-7 1,97E-7 6.41E-8 5.54E-8 4.40E-8 4.15E-8 4.39E-8 5.75E-8 6.56E-8 8.04E-8 6. 70E-8 7 .85E-8 6.71E-8 w 15.0 3.18E-8 3.22E-8 2.45E-7 1.60E-7 1.08E-7 3.53E-8 3.05E-8 2.42E-8 2.29E-8 2.41E-8 3.17E-8 3.63E-8 4.45E-8 3.69E-8 4.32E-8 3.68E-8 20.0 2.20E-8 2.22E-8 1. 78E-7 1.16E-7 7 .82E-8 2.44E-8 2.11E-8 1 ;69E-8 1.61 E-8 1.69E-8 2.19E-8 2.S0E-8 ~.06E-8 2. SSE-8 2. 97E-8 @. 52E-8 25.0 1.65E-8 1.67E-8 1.40E-7 9.07E-8 6.09E-9 1.84E-8 1.58E-8 1.28E-8 1.23E-8 1.29E-8 1.65E-8 1.88E-8 2.30E-8 1. 92E-8 2.22E-8 1. 89E-8 30.0 1.31E-8 1.32E-7 1. 1-4E-7 7 .41E-8 4.97E-8 1.47E-8 1 .26E-8 1.02E-8 9.84E-9 1.03E-8 1,31E-8 1.49E-8 1.82E-8 1.53E-8 1. 76E-8 1.49E-8 35.0 1.08E-8 1.09E-8 9.66E-8 6.25E-8 4.19E-8 1. 21 E-8 l.04E-8 8.48E-9 8.18E-9 8.57E-9 1.08E-8 1.22E-8 1.50E-8 1.26E-8 1.44E-8 l .22E-8 40.0 9.15E-9 9.18E-9 8.34E-8 5.40E-8 3.61E-8 1.03E-8 8. 75E-9 7.21E-9 6.97E-9 7 .30E-9 9.14E-9 1.03E-8 1.27E-8 l .07E-8 1.22E-8 1.03E-8 45.0 7 .90E-9 7.91E-9 7 .34E-8 4.74E-8 3.17E-8 8.87E-9 7 .55E-9 6,25E-9 6,06E-9 6.34E-9 7 .89E-9 8,92E-9 1.09E-8 9.22E-9 1.05E-8 8.88E-9 50.0 6.93E-9 6.93E-9 6.54E-9 4.22E-8 2.82E-8 7.79E-9 6.62E-9 5.S0E-9 5.34E-9 5.60E-9 6.92E-9 7 .SlE-9 9.SSE-9 8.10E-9 9.19E-9 7. 77E-9

.568 3.54E-5

  • Exclusion Distance (374 feet)

BASIS FOR ESTIMATES Annual and seasonal x/Q values were calculated from the equation

( 1) where x = activity concentration, *curies/m 3 Q = activity release rate, curies/sec F(e,s,j) = the frequency during the pertod of interest that the wind is from the direction e, for the stability con-*

dition s, and wind speed class j a s = the vertical dispersiori parameter evaluated at the 2

distance x for the stability conditions, meters uj = the representative wind speed for class j, meters/sec x = distance downwind, meters The equation was summed for a11 wind speed and stabi 1i ty c1asses with o taking appropriate values according to the Pasquill-Gifford classifi-2 cation scheme. Meteorological data used to calculate these x/Q es~imates were obtained from on-site measurements made from August l, 1972 through July 31, 1973.

2.E-35

REFERENCES APPENDIX 2.E

1. U.S. Department of Commerce, ESSA, "Climatological Summary, Columbia, South Carolina, 11 in Cl imatography of the U. S. , No. 60-38, 1973.
2. Army, Navy and Air Force Manual, Engineering Weather Data TM5-785, NAVDOCKS P-89, AFM88-8, Chapter 6, April 1963.
3. U.S. Department of Commerce, Weather Bureau, Rainfall Frequency Atlas of The United States, Technical Paper No. 40, May 1961.
4. U.S. Department of Commerce, Weather Bureau, Maximum Recorded United States Point Rainfall for 5-Minutes to 24-Hours at 296-First Order Stations; Technical Paper No. 2, Revised 1963.
5. STAR Program for On-site Data Diffusion Climatology~ WESD, Monroeville, Pennsylvania. -
6. U.S. Atomic Energy Commission, Division of Reactor Standards, Safety Guides for Water-Cooled Nuclear Power Plants, Safety Guide 1.4, "On-site Meteorological Programs, 11 1972.
7. Slade, D.H., ed., "Meteorology and Atomic Energy 1968, U.S. Atomic 11 Energy Division of Technical Information, Springfield, Va. 22151.
8. Kornasiewicz, R., A.E.C., Personal Communication with Van Vleck, L. D.,

~ESD, September 1973.

2.E-36

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