ML19093B349

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Response to Request for Appendix I Analysis & Advising Expect to Submit Final Report During Month of October 1976
ML19093B349
Person / Time
Site: Surry  Dominion icon.png
Issue date: 09/13/1976
From: Stallings C
Virginia Electric & Power Co (VEPCO)
To: Rusche B
Office of Nuclear Reactor Regulation
References
224
Download: ML19093B349 (14)
v • d • e


Text

e ft.[GULATDRY DOCKET flLf COPY

!.J Sept*""lZilier 13, l97G*

Mr. B~r""'lrd G., Ru3cho Director of N'u:.:lear React.or Regulation

u. 8 e Nuclear Rcgulntory Ccranission Washin3ton0 o. c. 20555 Docket l{os.

50-2iH Attn: Nr. Robert w. Reid, Chief Operating Reactors Brauch 4 License Nos.

D11.u.... 32 Jffi... 37 De.:ir ?:1r

  • RU!3Che s Enclosed herewith is information which you requested regarding th~

Append!..~ I :malysia for the Surry Power Station, Unit Nos. 1 and 2. The in*

formation is designated using the sa.'"00 I101I10nclature used in our schedule forwarded with our letter o.f ~j;iy 20 1 1976, Sf;!rial Mo,, 577Ae Tha following infortrultion is enclosed herew!ths 1Q Item. No. 1.. 3.md Il-3... Meteorological information de.U.neatcd in RG 1.. DD.

2. Itc.-:i II.. 4.. Dencription of the meteorological data 11 models and p~rnmcters used to determine X/Q and D/Q values.
3. Item :Ho. II-5... Joint frequency distTibutions of Wind speed and direction by atmospheric stability c14Bs.
4. Item No. 11-7
  • Description of air flow trajectory regimes.

As indicated in previous correspondence and discussions, we expect to submit a final report during the month of October 1976.

£D,closuxes Very truly yours,

§rig! rial S!gruld By fil,~~GS.

c. M. St.i.111ings Vice Pre.sident-Power Supply

. and Production Operations I

i I

I I

f'

"**-- ~--..

Item 3 ENCLOSURE 2 SURRY l & 2 e

Based on considerations in Draft Regulatory Guide 1. DD provide estimates of relative concentration ( X/Q) and deposition (D/Q) at locations specified in response to Item 2 above for each release point specified in response to Item 1 above.

Response

Table 2. 3-1 provides X/Q and D/Q values for ground level and mixed-mode releases for the special appropriate distances as indicated in Enclosure 2, Item 2 for each downwind sector. Tables 2. 3-2 and 2. 3-3 provide X/Q and D/Q values associated with surface level releases from the containment (considered as entrained in the building wake and therefore a ground level release) for the standard population distances. Tables 2. 3-4 and 2. 3-5 provide X/Q and D/Q values associated with a process vent release from

3. 048 m above one of the containment structures, or approximately 43 m above grade (considered as a mixed-mode release) for the standard popula-tion distances.

Two years {1974-1976) of onsite meteorological data for the March 3, 1974 to March 2, 1975 and May l, 1975 to April 30, 1976 periods were used for all X/Q and D/Q calculations.

6T 15aft-3Sft stability data were used for l:oth ground level, and mixed-mode release calculations. Wind data from the 35-ft level were used for ground level release calculations, while 150-ft level wind data were used for calculations for that portion of mixed-mode releases qualifying as elevated.

Item 4 ENCLOSURE 2 SURRY 1 & 2 Provide a detailed description of the meteorological data, models and parameters used to determine the X/Q and D/Q values. Include informa-tion concerning the validity and accuracy of the models and assumptions for your site and the representativeness of the meteorological data used.

Response

a.

Model Dispersion factors ( X/Q) were calculated using a sector-average, straight-line model specified in Regulatory Guide 1. 111. Ground deposition (D/Q) values were calculated according to Regulatory Guide 1. 111 (Reference 1).

The mixed release mode was used as applicable for a release height of

3. 05 m above the 40. 1 m containment from a O. 08 m diameter vent at an exit velocity of 30. 5 m/ s. Qualifying elevated release heights were ad-justed for momentum, stack downwash, and terrain rise as described in Re-gulatory Guide 1. 111
  • The open terrain correction factor for X/Q and D/Q values was applied in accordance with Figure 2 of Regulatory Guide 1. 111. As described in References 2 and 3 and in the response to Item 8 of Enclosure 2 of this filing, the terrain is flat and rises to less than about 170-ft out to a distance of 50 miles near Richmond (References 2 and 3).
b.

Data The calculated X/Q and D/Q values were based on onsite meteorological

.data during the 1974-1976 period of March 3 1 1974 to March 2, 1975 and May 1, 1975 to April 30, 1976.

Representative joint frequency distributions were developed for ground level or elevated releases from the plant:

References..

ENCLOSURE 2 SURRY 1 & 2 (1)

Ground level release X/Q and D/Q calculations were based on meteorological tower observations of wind speed and direction at the 35-ft level and of temperature differential (L\\T) between the 15 0-ft and 35-ft levels.

These levels were selected to conservatively represent the transport and diffusion of surface releases in the vicinity of the plant or for ve~t releases entrained in the plant building wake. The a z diffusion parameter was based on the curves in Figure 1 of Regulatory Guide 1

  • 111 {Reference 1) *

(2)

Qualifying elevated release X/Q and D/Q calculations were based on meteorological tower observations of wind speed and direction at the 150-ft level and of the same temperature differential (L\\T) between the 15 0-ft and 35-ft levels, as representing the environment of the plume between its release height and the ground.

1.

Methods for Estim~i"tiricj AtmOspheric Transport and Dispersion of Gaseous Releases from Light-Water-Cooled Reactors, Regulatory Guide 1.111, U.S. Nuclear Regulatory Commission, March 19 76

  • 2
  • Surry 3 & 4 Annual Meteorological Report, Virginia Electric and Power Company, Docket Nos. 50-434 and 50-435, August 1975.

3

  • Suny Power Station Units 3 and 4 Final Environmental Statement, U. S. Atomic Energy Commission, Docket Nos. 50-434 and 50-435, May 1974.

Item 5 ENCLOSURE 2 SURRY 1 & 2 If an onsite program commensurate with the recommendations and intent of Regulatory Guide 1.23 exists:

a)

Provide representative annual and monthly, if available, joiht fre-quency distributions of wind speed and direction by atmospheric stability class covering at least the most recent one year period of record, pre-ferably two or more years of record. Wind speed and direction should be measured at levels applicable to release point elevations and stability should be determined from the vertical temperature gradient between measurement levels that represent conditions into which the effluent is released.

b)

Describe the representativeness of the available data with respect to expected long-term conditions at the site.

Response

The onsite meteorological monitoring program (Reference 1) is commensurate with the recommendations and intent of Regulatory Guide 1. 23 (Reference 2).

The meteorological tower is located approximately 4900-ft southeast of Unit 1 in a clearing of trees. These trees are not anticipated to affect the meteorological measurements (Reference 1). Among other parameters monitored on the 150-ft tower are winds and differential temperature (6T). The instrumentation has been regularly maintained and calibrated quarterly during 197 4 to 1976. The March 3, 1974 to March 2, 1975 analog and digital data were processed as described in Reference 1. Exclusively digital data were used for the May 1, 1975 to April 30, 197 6 period.

The data were listed, reviewed and summarized into joint frequency distri-butions by using the atmospheric stability classification scheme shown in_

Table 2 of Regulatory Guide 1. 23.

The joint frequency distributions of wind speed and wind direction by atmos-pheric stability class were prepared on a monthly and an annual basis based on the format of Table 1 ih Regulatory Guide 1. 23. Monthly and annual joint frequency distributions of 35-ft wind and 6T1soft-3Sft data are presented in Appendix 2. 5-A; and were used as input for X/Q and D/Q calculations for

!~

ENCLOSURE 2 SURRY 1 & 2 ground level releases. The 2-yr data recovery for this data set was 94 percent.

Monthly and annual joint frequency distributions of 150-ft wind and 6TlSOft-3Sft data are presented in Appendix 2. 5-B and were used as input for qualifying elevatecl release calculations of X./Q and D/Q. The 2--yr data recovery for this data set was 87 percent. This two year 1974-1976 data set was chosen a~ the most recent representative data set that could be used to respond to Enclosure 2.

The meteorological data for the period 197 4-197 6 are considered to be repre-sentative of atmospheric transport and diffusion conditions of the site region on a long term basis. The stability distribution based on 6T1soft-3Sft for the period March 3, 197 4-March 2, 197 5 is consistent vVith the 2-yr dc1.ta period as used in this report (Table 2. 3-6). Comparison of annual wind roses for both the 35-ft and 150-ft levels indicates that the annual 2-yr wind roses are consistent with the first year of data and are in general agreement with Richmond and Norfolk wind roses for the period January l, 19 69-December 31, 1973 (Reference 1). The reprc~entativeness of the first year of the two year data set to the long term meteorological conditions is discussed in Reference 1.

References

1.
2.

Surry 3 & 4 Annual Meteorological Report, Virginia Electric and Power Company, Docket Nos. 50-434 and 50-435, August 1975.

Onsite Meteorological Programs, Regulatory Guide 1. 23, U. S. Nuclear Regulatory Commission, February 1972.

Item 6 ENCLOSURE 2 SURRY 1 & 2 If recent onsite meteorological data are not available, or if the meteorological measurements program does not meet the recommendations and intent of Regulatory Guide 1

  • 2 3:

a)

Provide the best available meteorological data in the format described in item 5.a above.

b)

Describe the representativeness of the available data with respect to onsite and near site atmospheric transport and diffusion conditions, and with respect to expected long term conditions at the near the site.

c)

Provide a description of the meteorological measurements used for collection of the data presented. This description should include the loca-tion of the sensors with respect to the power plant(s) and other prominent topographic features (including buildings) and accuracy of the instrumentation.

d)

Provide a commitment to establish a program to meet the recommendations and intent of Regulatory Guide 1. 23, or provide sufficient justification to allow the present program to remain unchanged *.

Response

See Item 5 Response above as recent meteorological data conforming to the recommendations and intent of Regulatory Guide 1. 23 are available.

Item 7 ENCLOSURE 2 SURRY 1 & 2 Describe airflow trajectory regimes of importance in transporting effluents to the locations for which dose calculations are made.

Response

As discussed in Response to Item 4, the terrain is flat and low-relief out to a distance of 5 0 miles. Therefore, straight-line airflow trajectory regimes are considered to reasonably represent dispersion conditions as related to annual average X/Q values in the vicinity of the Surry 1 & 2 plant.

TABLE 2*~ ~~l SURRY 1 & 2 X/Q AND D/Q VALUES AT SPECIAL DISTANCES AND RELEASE MODES f.OR A 2-YR DATA PERIOD*

  • Mixed-Mode Release

( Joint Ground Level and Receptor Ground r,evel Release ElevaJed Release)* 2 Direction Distance (m)

X/Q(sec/m )

D/Q (m-2)

X/Q(sec/m )

D/Q (m -

)

NNE 2414

4. 7(-06) **
1. 0(-08) 3.9(-07)
  • 2.2(-09)

NNE 3058 2.9(-06)

5. 9(-09)
2. 8(_-07)
1. 3(-09)

NE 2333 5.2(-06)

1. 1(-08) 4.2(-07)
3. 3(-09) s 503 3.1(-05)

. 1. 7(-07) 8.0(-07) 3.5(-08) s 2470

1. 5(-06) 5.5(--09) 3.1(-07)
2. 5(-09)

SSW 3492

3. 8(-07)
1. 4(-09) 1.2(-07) 7.7(-10)

SW 2881 6.7(-07) 2.0(-09) 1.2(-07) 9.7(-10)

SW 3379

4. 8(:-07)
1. 4(-09) 1.1(-07) 6.6(-10)

WSW 4828

2. 0(-07) 5.9(-10)
6. 8(-08) 3.3(-10)

NNW 6034 5.9(-07) 5.9(-:-10)

5. 5(-08)
1. 2(-10)

N 274

2. 7(-04)
5. 9(-07)
5. 8(-07) 2.6(-08)

N 503 9.5(-05) 2.2(-07) 4.5(-07)

1. 7(-08)

SSE 4747 4.1(-07) 1.3(-0~)

7.5(-08) 4.8(-10)

  • Data period is March 3, 1974-March 2, 1975 and May 1, 1975-April 30, 1976.

Open terrain corrective factors of Regulatory Guide 1. 111 are incorporated.

    • 4*. 7(-06) = 4. 7 X 10-6

TfH~~l"! ? ~ ~:72 SURRY 1 & 2

. ANNUAL AVERAGE X/Q. (se~/;3,) VALUES BASED ON A GROUND LEVEL RELEASE FOR A 2-YR DATA PERIOD*

Distance in Meters Receptor Direction 805 2414 4023 5633 7242*

12070 24140 40234 56327 72420 N

4. 4(-5) 4.7(-6)
1. 7(-6) 9. 4( ~7)
6. 2(-7) 2.6(-7)
1. 1(-7) 5.5(-8) 3.6(-8) 2.7(-8)

NNE

4. 4(-5)
4. 7(-6)
1. 7(-6) 9. 2(-7) 6.1(-7) 2. 6(-7) 1.0(-7) 5. 4(-8).
3. 6(-8) 2.6(-8)

NE 4.5(-5) 4.8(-6)

1. 7(-6) 9. 5 ( ~7)
6. 2 (-7) 2.6(-7) 1.1(-7) 5. 6(-8) 3.7(-8) 2.7(-8)

ENE 2.0(-5) 2.1(-6) 7.5(-7) 4.1(-7) 2.7(-7)

L 1(-7) 4.6(;-8) 2. 4(-8)

l. 6(-8) 1.1(-8)

E

l. 8(-5)

J.9(-6)* 6.6(-7) 3.6(-7) 2.4(-7) 9.9(-8)

4. 0(-8) 2.1(-8)
1. 4(-8)
1. 0(-8)

ESE

1. 5(-5)
1. 5('"".6)
5. 3(-7) 2.9(-7)
.9(-7} 7.8(-8)
  • 3.1(-8) l.6(-8)
1. 1(-8) 7. 8(-9)

SE 1.5(-5)

1. 6(-6) 5.5(-7) 3. 0 (-7) 1.9(-7) 8.1(-8)
3. 3(-8)
1. 7(-8)
1. 1(-8) 8. 1(-9)

SSE

1. 6(-5) 1.6(-6) 5.6(-7) 3.0(-7) 1.9(-7) 8.0(-8) 3.2(-8) 1.6(.... 8). 1.1(-8) 7.8(-9) s 1.5(-5)
1. 6(-6) 5.3(-7) 2.9(-7)
1. 8(-7) 7.6(-8)
3. Q(-8)
1. 5(-8) 1.0(-8) 7. 3(-9)

SSW*

8.1(-6)

8. 2(-7) 2.8(-7) 1.5(-7)* 9. 4(-8) 3.8(.-8) 1.5(-8) 7.6(-9)
4. 9(-9) 3.6(-9)

SW 9.4(-6)

9. 5(-7) 3. 3(-7) 1.8(-7)
1. 2(-7) 4.8(-8) 1.9(-8) 9.7(-9) 6.4(-9) 4.6(-9)

WSW 8.2(-6) 8.2("'."7)' 2.8(-7)

1. 5(-7) *. 9.5(-8)** 3.9(-8) 1.5(-8) 7. 8(-9)
5. 0(-9) 3.7(-9) w
1. 3(-5) 1.3(-6) 4.4(-7) 2.4(-7) 1.5(.;.7) 6.3(-8)
2. 5("'."8)
1. 3 (-8) 8.2(-9). 6. 0("'.'"9)

WNW

1. 8(-5)
1. 9(-6) 6.4(-7) 3.5(-7). 2.3(-7) 9.4(-8) 3.*8(-8) 2.0(-8) 1.3(-8) 9~3(-9)

NW 2.1(-5) 2.2(-6) 7.8(-7) 4.2(-7) 2.8(-7) 1.2(-7)

4. 6(-8) 2. 4(-8)
  • 1. 6(-8) 1.2(-8)

NNW 3.3(-5) 3.6(-6). 1.3(-6) 7.0(-7) 4. 6(--7). 2.0(-7) 7 *. 9(-8) 4.1(-8) 2.7(-8) 2.0(-8) 0.5 mi

1. 5 mi 2.5 mi 3.5 mi 4.5 mi 7.5 mi
15. 0 mi 25.0 mi 35.0 mi 45. 0 mi
  • Data period is March 3P 1974-March 2, 1975 and May 1, 1975-April 30, 1976.

Open terrain correction factors of Regulatory Guide 1.111 are incorporated.

TABLE 2.3""'.3 I

SURRY I & 2 ANNUAL AVERAGE D/Q (m-2) VALUES. BASED ON A GROUND LEVEL RELEASE FOR A 2-YR DATA PERIOD*

  • Distance in Meters Receptor Dtrecttor:

805 2414 4023 5*633 7242 12070 24140 40234 56327 N

9.7(-08) 7. 3(-09) 2.l(""'.09) 9.9(-10) 5.9(-10) 2.0(-10) 5.4(-11) 2.0(-11) 1.0(-11)

NNE

1. 4(-07) 1. 0{-08) 3. 0(-09) 1. 4(-09) 8.4(-10) 2. 8(-10) 7.8(-11) 2.9(-:lll 1.5(-11)

NE

1. 4(-07) 1. 0(-08) 3.0(-09) 1. 4(-09) 8.3(-10) 2.8(-10) 7.6(-11) 2. 8(-:-11),1.4(-11)

ENE 6.4(-08) 4. 8(-09) 1. 4(-09) fr.5(-10) 3.9(-10) 1.3(-10) 3. 6(-11) 1. 3(-11) 6.7(-12)

E

  • 6. 0(-08) 4.5(:..09) 1.3(-09) 6.* 1(-10) 3.6(-10) 1.2(-10) 3. 3 (-11). 1. 2(-11).6.2(-12)

ESE 6~0{-08) 4. 5(-09) 1. 3(-09) 6.2(-10) 3. 7 (-10) 1.2(-10) 3.4(-11) I.2{"'.""11) 6.3(-12)

SE

7. 4(-08) 5. 5(-09) 1. 6(-09) 7. 6:(-10) 4.5(-10) 1.5(-10) 4.1(-11) 1.5(-11) 7.7(-12)

SSE 8.4(-08) 6.3(-09) 1. 8(-09) 8.6(-10) 5.1(-10) 1.7(-10) 4. 7(-11) 1.7(-11) 8.8(-12')

s

7. 7(-08) 5.7(-09) 1. 7(-09) 7.9(-10) 4.6(-10) 1.5(-fO) 4.3(-11) 1.6(-11).8. oc...: 12)

SSW 4.5(-08) 3.3(-09) 9.6(-10) 4.6(-10) 2.7(-10) 9.0(-11) 2. 5 (.,. 11) 9. 1 (-12) 4.6('.""12)

SW 4.0(-08) 3.0(-09) 8.8(-10) 4.2(-10) 2.5(-10) 8.2(-11) 2.3(-11) 8.3(-12) 4.2(-12)

.WSW 4.1(-08) 3. l (-09)' 8. 8(-10) 4.2(-10) 2. 5(-10) 8.2(-11) 2. 3(-11) 8.3(-12) 4. 3(-12) w

6. 4(-08) 4. 8(-09) 1. 4(-09) 6.5(-10) 3. 9(-10) 1.3(-10) 3.6(-11) 1. 3(-11) 6. 7(-12)

WNW 7.0(-08) 5.2(-09) 1. 5(-09) 7.1(-:-10) 4.2(-10) 1.4(-10) 3.9(-11) 1.4(-11) 7.3(-12)

NW

7. 2(-08) 5. 4(-09) 1. 6(-09) 7.3(-10) 4.3(-10) 1. 4(-10) 4. 0(-11) 1.5(-11) 7.5(-12)

NNW

7. 0(-08) 5. 3(-09) 1. 5(-09) 7.2(-10) 4.3(-10) 1. 4(-10) 3.9(-11) L4(-ll) 7.3(-12) 0.5 mi 1.5 mi 2.5 mi * :3. 5 mi 4.5 mi 7.5 mi
15. 0 mi 25.0 mi. 35. 0 mi
  • Data period is March 3. 1974-March *2, 1975 and May l, 1975-April 30, 1976.

72420 6.2(-12) 8.9(-12) 8.8(-12)

.4.1(-12)

  • 3.8(-12) 3.9(-12) 4.7(-12) 5.4(-12)
4. 9(-12) 2.9(-12) 2.6(-12) 2.6(-12) 4.1(-12) 4.5(-12) 4.6(-12) 4.5(-12) 45.o mi J

Receptor Directior 805 N

5.6(-7)

NNE 8.3(-7)

NE

1. 0(-6)

ENE 6.6(-7)

E

6. 8(-7)

ESE

6. 7(-7)

SE

7. 5(-7)

SSE 7.3(-7) s 8.7(-7)

SSW

6. 2(-7)

SW 5.4(-7)

WSW 6.* 0(-7) w

7. 1(-7)

WNW 6.0(-7)

NW

7. 5(-7)

NNW 4.4(-7) 0.5 mi

. 'fl\\~µ; ~ ~ ~.~ 4 SURRY 1 & 2

~ o\\.

  • ~

ANNUAL AVERAGE 'X./Q (se9/m3) VALUES BASED QN A MIXED MODE RELEASE FOR A 2-YR DATA PERIOD*

Distance in Meters 2414 4023 5633 7242

. 12070 24140 40234 *

.2.8(-7) 1.4(-7) 8.9("".8) 6.8('.""8) 3.5(-8) 1.2(-8) 6.3(-9) 3.9(-7) 1.8(-7) 1. 2(-7) 8.9(-8) 4.4(-8) 1. 4(-8) 7.3(-9)

3. 9(-7) 1.8(-7) 1. 1(-7) 8.2(-8) 4.1(-8)
1. 4(-8).6.9(-9) 2.3(-7)
1. 1(-7) 6.6(-8) 4. 7(-8) 2.4(-8) 8.1(-9)
4. 1(-9).
2. 3(-7) 1.0(-7) 6.4(-8)* 4.6(-8) 2.3(-8) 8. 0(-9) 4.1(-9)
1. 9(-7) 8. 2(-8). 5. 3(-8) 3.7("'."8)' 1. 8(-8) 7.2(-9) *3.7(-9) 2.1(-7) 9.1(-8) 5.6(-8) 4.0(-8)
1. 9(-8) 7.1(-9)
3. 6(-9) 2.2(-7) 9.5(-8) 5.8(-8) 4. 0(-8) 1.9(-8) 6.7(-9). 3.4(-9) 3.1(-7)
1. 4(-7) 8.4(-8) 5.9(-8) 2. 8(-8) 8.6(-9)
4. 4(-9)
2. 0(-7) 8.9(-8) 5.9(-8) 4.3(-8) 2.0(-8) 6.6(-~)
3. 4(-9) 1.6(-7) 7.B(-8) 4.8(-8) 3.5(-8)
1. 7(-8) 5.6(-9) 2. 9(-9)
1. 7(-7)' 7.8(-8) 5.3(-8) 3.7(-8) L9(-8f 6. 1(-9) 3.1(-9) 2.3(-7) 1.0(-7) 6.7(-8) 5.0(-8) 2.3(-8) 7.5(-9)
3. 8(-9)
2. 3(-7)
1. 1(-7) 6.6(-8) 4. 7(:-8)
2. 3(-8) *.8.9(-9)
4. 5(-9) 2.2(-7) 1.0(-7) 6.4(-8) 4.*6(-8) 2. 5(-8) 9. 2(-9) 4.7(-9) 1.9(-7) 9.6(-8) 6.3(-8) 4.7(-8) 2. 8(-8) 9;s{-9) 5.0(-9) 1.5 mi 2.5 mi 3.5 mi 4.5 mi 7.5 mi 15.0mi. 25. 0 mi 56327
4. 1(-9)
  • 4. 8(-9) 4.5(-9) 2.7(-9) 2.6(-9)
2. 4(-9) 2.3(-9)
2. 2 (-9)"
2. 8(-9) 2.2(-9)
1. 9*(-9)
2. 0(-9) 2.5(-9) 3.0(-9)

. 3.1(-9) 3.3(;._9) 35.0 mi

  • Data period is March 3, 1974-March 2, 1975 and May 1, 1975-April 30, 1976.

Open terrain correction factors of Regulatory Guide 1.111 are incorporated.

72420

  • 3.0(-9) 3.5(-9) 3.3(-9) -

2.0(-9) 1.9(-9)

1. 7(-9) 1.7(-9)
1. 6(-9).
2. 1(-9) 1.6(-9)
1. 4(-9)
1. 5(-9) e L 8(-9) 2.2(-9) 2.2(-9)
2. 4 (:...9)
45. 0 mi

TABLE 2.3-5

,:,.:*II'

  • I;*

,}

SURRY 1 & 2 ANNUAL AVERAGED/~- (m~2) ~ALUES BASED ON A MIXED MODE RELEASE FOR A 2-YR DATA PERIOD*

Distance in Meters Receptor Direction 805 2414 4023 5633 7242 12070 24140

  • 40234 56327 72420 N
1. 0(-08) 1. 1(-09) 3.4(-10) 1. 8(-10) 1.2(-10) 5.8(-11) 2.4(-11)' 1.0(-11) 5.9(-12) 4. 1(-12)

NNE

2. 0(-08) 2.2(-09) 6. 7(-10) 3.4(-10) 2.2("'."10) 9.8(-11).3. 8(-11) 1.6(-11).9. 3J-12) 6. 4(-12)

NE

2. 9(-08) 3.0(-09) 9.0(-10) 4.5(-10) 2.* 9(-10) 1.2(-10) 4.3(-11) 1.9(-11) 1.1(-11)' 7.0(-12) -

ENE

1. 6(-08) 1. 7(-09) 5.2(-10) 2.6(-10) 1.6(-10) 6.4(-11) 2.3(-11) 9.9(-12) 5.6(-12) 3.7(-12)

E

1. 7(-08) 1. 8(-09) 5.3(-10) 2. 6(.:.10) l..6(-10) 6.4(-11) 2.3(-11) 9.7(-12) S.5(-12) 3.6(-12)

ESE 2.1(-08) 2. 2(-09) 6.5(-10) 3.2(-10) ].9(-10) 7.2(-11) 2.4(-11) 1. 0(-11) 5.7(-12) 3.7(-12)

SE 2.5(-08) 2.6(-09) 7.6(-10) 3. 7(-10) 2.3(-10) 8.5(-11) 2.9(-11) 1. 2(-11) 6.7(-12) 4.4(-12)

SSE

2. 1(-08) 2. 3(-09) 6.9(-10) 3.4(-10) 2. 1 (-: 10) 7.8(-11} 2. 7(-11) 1. 2(-: 11) 6.5(-12) 4.3(-12)
  • s 2.3(-08) 2. 6(-09) 7.9(-10) 3.9(-:-10) 2.4(-10) 9.1(-11) 3.2(-11) 1.4(-11) 7.9(-12) 5.2(-12)

SSW*

1.5(-08) 1. 8(-09) 5.3(-10) 2.6(-10) 1.6(-10) 6.1(-1~) 2.1(-11) 9.2(-12) 5.2(-12) 3. 4(-12)

SW

1. 3(-08) 1.4(-09) 4. 2.(-10) 2.1(-10) 1.3(-10) 4.8(-11) 1.5(-11) 7.0(-12) 3.9(-12) 2.6(-12)

WSW 1.5(-08) 1. 6(-09) 4.9(-10) 2.4(-10) 1.5(-10) 5.4(-11) 1. 9(..-11) 8.0(-12) 4.5(-12'} 2.9(-12)* *-

w

1. 7(-08) 1. 9(-09) 5.7(-10) 2.8(-10) J.7(-10) 6.5(-11) 2.3(-11). 9.7(-12) 5.5(-12) 3.6(-12)

WNW

1. 2(-08) 1.3(-09) 4.0(-10) 2.0(-10) 1.3(-10). 5.2(-11) 1.9(-il) 8.2(-12) 4.7(-12) 3.2(-12)

NW

2. 5(-08) 2. 4(-09) 7.1(-10) 3.5(-10) 2.2(-10) 8.2(-11) 2.8(-11) 1.2(-11) 6. 5(-12} 4.3(-12)

NNW 9.3(-08) 9.6(-'10) 2.9(-10) 1.5(-10) 9.9(-11) 4.5(-11).1. 8(--11) 7.5(-12) 4. 3(-12)' 3.0(-12) 0.5 mi 1.5 mi

2. 5 mi.* 3.5 mi 4.5 mi.*

7.5 mi. 15. 0 mi 25. 0 mi 35.0 mi 45. 0 mi

  • Data period is March 3,. 1974-March 2, 1975 and May 1, 1975-April 30,.1976.

Open terrain correction factors of Regulatory Guide 1.111 are incorporated.

TABLE 2. 3-6 SURRY 1 & 2 e

MONTHLY £\\T lSOft-3Sft STABILITY DISTRIBUTION (%)

A B

.- JAN 1975*

2.13 2-YR*

10.07

. FEB 1975

. 7.54 2-YR

-11.88

'MAR 1974-5. 20. 68 2-YR 17.04

APR 19 7 4 14
  • 9 2 YR 20.35

, MAY 1974

. 21.2.6 2-YR

  • 15.06
JUN 1974. 17.26.

t 2-YR 12 *. 85 l JUL 197 4 15.47 1

2-YR 7.67 j AUG 1974.

10.01 2-YR 6.73

- SEP 1974 14.12 2-YR 7.77 OCT1974 15.80 2-YR 10.98

  • 7 4 2-YR 11.72

'DEC 1974 16.95 2-YR 13.27 2.63 2.19 3.28 3.83

. 4.46 4.12 2.44 2.59 4.42 3.35

  • 4~99 3.68 5.56 3.33

. 3. 65

3. 05 5.24 3.78 2.66 3.08 4.08
3. 07 4.89
3. 76 C

2.79 2.42 4.10 3.35 5.36 4.12 4.26 3.50 4.42 4.28 3.12 3.37 6.91 4.27 5.28 4.58 4.37 3.63 2.24' 2.87 3.52 3.97 3.02 2.77 D

36. 29, 32.08 35.57.

25.68 32.29

29. 75 21.77 18.18 24.25 21.98 25.57 17.95 19.67 21.49 29.50 28.36 26.93 23.46 17.62 18.72 21.38 21.48 27.01 29.03 E

41.22

.39. 73 31.97 34.53 28.12 32.42.

40.79 33-. 78 32.24 34.33 34.51 30.56 31.83 38.13

37. 89
  • 34. 88 33.77 41.03 25.73 31.7I 29.11 31.94 34.48 36.48 F

7.88 5.* 93 9.02 9.65 4.02 4.77 8.37 9.65 7.42 9*.92 5.41 9.72 8.56.

9.-04

.6.77 11.10 7.57

7. 63
  • 14.13 12.12 13.22 13.88 7.61 7.95 G

7.06 7.57 8.52 11.08 5.06

  • 7. 80 7.46 11~96 5.99 11.06 9.15 21.87 12.01 15.27 6.90 11.30 8.01
12. 71 21.82 20.52 11.95 13.95 6.03 6.74
  • The f.irst-year data period is March 3, 197 4-March 2, 1975 and the 2-yr data period is the combined years of March 3, 19 7 4-March 2, 197 5 and May l, 19 7 4-April 30, 197 5.
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