ML20078G406

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Rev E to Procedure EP-ENV-3E Manual Determination of X/Q (Knpp Meteorological Data)
ML20078G406
Person / Time
Site: Kewaunee Dominion icon.png
Issue date: 06/21/1983
From: Marchi M
WISCONSIN PUBLIC SERVICE CORP.
To:
Shared Package
ML20078G335 List:
References
EP-ENV-3E, NUDOCS 8310120227
Download: ML20078G406 (6)
v • d • e


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1 NO. EP-ENV-3E REv. E I

Kewaunee Nuclear Power Plant i TITLE : Manual Determination of X/Q (KNPP Meteorological Data)

((,s) EMERGENCY PLAN IMPLEMENTING PROCEDURE I I I PAGE 1 of 6 C/ l DATE: [

2 1 W ll REVIEWED BY p //S eda f p APPROVED BY [/[, tu n ;p

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1.0 APPLICABILITY This procedure is used to estimate the atmospheric dispersion factor (X/Q) using Kewaunee Nuclear Power Plant Meteorological Data.

2.0 PRECAUTIONS 2.1 As a minimum, the following meteorological parameters from the Kewaunee Nuclear Power Plant Meteorological tower.are required to use this procedure.

a. Average wind speed indication (60 meter elevation or 10 mater elevation)<
b. Average wind direction indication (60 meter elevation or 10

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meter elevation).

g? ~'s c. Vertical Temperature Difference indication (Delta T between 60 N ) meters and 10 meters).

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If this minimum data is not available, use EP-ENV-3F, Manual Determination of X/Q (Green Bay Heteorological Data), to detemine atmospheric dispersion.

2.2 Meteorological sta must be re-evaluated every 30 minutes or whenever significant changes occur, to determine if X/Q must be recalculated.

2.3 When determining X/Q or Xu/Q for a point of interest that falls between two isopleths on an overlay, select the value of X/Q or Xu/Q that corresponds to the isopleth lying closest to the plume centerline.

If a point of interest lays between an isopleth and plume centerline,.

select the value of X/Q or Xu/Q that corresponds to the nearest mile marker on the centerline.

2.4 the WIND DIRECTION CIRCLE on the Base Map may appear to the user to be shifted 180 degrees. This is not an error. the WIND DIRECTION CIRCLE reflects the direct use 5NnTdirection information.

3.0 REFERENCES

/ 3.1 NRC Regulatory Guide 1.145, Atmospheric Dispersion Models for Potential

()T Accident Consequence Assessments at Nuclear Power Plants, August 1979 3.2 NRC Regulatory Guide 1.23, Rev 1 (Proposed), Meteorological Programs In Support of Nuclear Power Plants, September 1980.

8310120227 830929 PDR ADOCK 05000305 F pop

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. . I WISCONSIN PUBLIC SERVICE CORPORATION l NO. EP-ENV-3E I

Kewaunee Nuclear Power Plant i TITLE: Manual Determination of X/Q l (KNPP Meteorological Data)

h. \ EMERGENCY PLAN IMPLEMENTING PROCEDURE I I

[Q l DATE:

21 M l PAGE 2 of 6 4.0 INSTRUCTIONS 4.1 Record Meteorological ParametersSection I on Form ENV-3E.1, ,3 Meteorological Data Worksheet. ,'-

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4.2 Determine the stability class using the Vertical Temperature Difference (item I-E on Form ENV-3E.1) and tha table in Section II of Form ENY-3E .1 ) .

4.3 - Determine release elevation from Section III of Form ENV-3E.1.

4.4 For Elevated Releases complete steps 4.4.1 through 4.4.8. ~ If the release is ground level, proceed to step 4.5.

4.4.1 Place the elevated overlay for the stability class determined in step 4.2 on the Base Map.

4.4.9 Align the centerline of the overlay with the ac' ual wind direction value from WD60 (iten I-A on Fom ENV-3E.1) on the Base Map Wind Direction Circle.

NOTE: If WD60 value is not available, use WD10 value.

4.4.3 Record points of interest in the path of the plume in column 1 on Fom ENV-3E.2 and record the corresponding sector in column 2.

4.4.4 Determine the distance from the release point to each point of interest and record in column 3 of Form ENV-3E.2 (Base Map Scale: 2 inches = 1 mile).

A.4.5 Record wind speed h360 in column 4 of Fonn ENV-3E.2 (Wind Speed is the sa:ne for all points of interest).

NOTE: If WS60 is not available, use WS10 value. ,_

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I 4.4.6 Calculate impact time (IT) using the formula on Form ENV-3E.2 --

and record in column 5.

4.4.7 Detennine X/Q for each point of interest from the overlay and record in column 7 of Form ENV-3E.2.

4.4.8 Proceed to step 4.6 (step 4.5 is not required for elevated releases).

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WISCONSIN PUBLIC SERVICE CORPORATION i !!0. EP-E!!V-3E I

Kewaunee fluclear Power Plant l TITLE: Manual Determination of X/Q (KilPP Meteorological Data)

(( EMERGEtEY PLAll IMPLEMEllTIllG PROCEDURE l

l i DATE: yg l PAGE 3 of 6 4.5 For Ground Level Releases, complete steps 4.5.1 through 4.5.8 4.5.1 Place the ground level overlay for the stability class determined in step 4.2 on the Base Map.

4.5.2 Align the centerline of the overlay with the actual wind direction value from WD10 (item I-B on Fom ENV-3E.1) on the Base Map Wind Direction Circle.

NOTE: If WD10 is not available, use WD60 value. .

4.5.3 Record points of interest in the path of the plume in column 1 of Form ENV-3E.2 and record the corresponding sector in column 2 4.5.4 Determine the distance fran the release point to each point of interest and record in column 3 of Form ENV-3E.2 (Base Map Scale: 2 inches = 1 mile).

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4.5.5 Record wind speed WS10 in column 4 of Fom ENV-3E.2 (Wind Speed is the same for all points of interest).

NOTE: If WS10 is not available, use WS60 value. ,

4.5.6 Calculate impact time (IT) using the formula on Form ENV-3E.2 and record in column 5. ..

4.5.7 Determine Xu/Q for each point of interest from the overlay and record in column 6 of Form ENY-3E.2.

l 4.5.8 Calculate-X/Q for each point of interest using the formula on Form ENV-3E.2 and record in column 7.

4.6 Detemine if lake breeze exists using Fonn ENV-3E.2. If lake breeze conditions exist, implement special field monitoring in accordance wit _h EP-ENY-3A, section 6.0. _

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FORM ENY-3E.1 METEOROLOGICAL DATA WORKSHEET DATE TIME I. Meteorological Parameters Parameter Parameter Paramenter Description Name Indication A. Wind Direction at 60 meter level WD60 Degrees q'

B. Wind Direction'at 10 meter level WD10 Degrees ,

C. Wind speed at 60 meter level WS60 mph x 0.447 = m/sec l

! D. Wind speed at 10 meter level WS10 ___ mph x 0.447 = m/sec E. Vertical Temperature Difference VTD *F F. Standard Deviation of Horizontal Wind Direction SIGMA THETA Degrees II. Stability Class Use below table to determine stability class. [ ,

- Stability. Pasquill Sigma Theta Classification Categories (degrees) VTD (*F)

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Extremely unstable A 6g >_22.5 VTD 1-1.71 Moderately unstable B 22.5 > 6g > 17.5 -1.71< VTD. 3-1.53 Slightly unstable C 17.5 > 6g > 12.5 -1.53< VTD f - 1.35 Neutral D -1.35< VTD 1 - 0.45 12.5 > Og' > 7.5 Slightly stable _

E 7.5 > Ug > 3.8 -0.45< VTD 1 1.35 Moderately stable F ~3.8 > Ug > 2.1 1.35< VTD 1 3.60 Extremely stable G 2.1 > UO 3.60< VTD -

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NOTE: If VTD and Sigma Theta do not agree use VTD classification.

. III. Release Elevation .,

An Elevated release must meet all of the below criteria, otherwise the release is considered Ground Level.

a. Primary to Secondary Leak is in progress.
b. Release is from Steam Generator Safety Valves, Steam Generator Power Operated Relief Valve or Auxiliary Feed Pump Turbine Exhaust.

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. c. Wind speed is less thar. Im/sec.

d. St. ability class is A, B, C or D.

Elevated Ground Level

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EP-ENV-3E JUN 211983 Page 5 of 6

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FORM EHY-3E.2 DATE TIME RELEASE WORKShEET 5 6 7 1 2 3 4 (D) (WS) (TT) * .

Distance Wind Speed Impact Time Xu/Q** X/Q***

Point of (meters-2 (sec/ meters 3)

Interest Sector (meters /sec) (minutes)

_( miles)

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  • IT = D/WS x 27 I

j ** N/A for Elevated Release (Xu/Q) v

      • khen calculating for Ground Level Release: X/Q = W5

t .. . . EP-ENV-3E JW 211983 Fage 6 of 6 FORM ENV-3E.3 LAKE BREEZE EFFECT WORKSHEET DATE TIME I. Is local wind direction (WD10 from Fonn 3E.1 or WD60 if WD10 is not available) .

between 20* and 170' clockwise? -

No - No lake breeze effect Yes - Proceed to Step II II. Call Green Bay National Weather Station and get wind direction in degrees.

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(Phone Number Wind Direction III. Is Green Bay wind direction between 210* and 330* clockwise? -

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'No - No lake breeze effect Yes - Lake breeze effect I

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