ML051300388

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Annual Radioactive Effluent Release Report
ML051300388
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 04/29/2005
From: Landahl S
Exelon Generation Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
FOIA/PA-2010-0209, RA05-33
Download: ML051300388 (98)


Text

ExekIrn.M Exelon Generation Company, LLC LaSalle County Station www.exeloncorp.com Nuclear 2601 North 210Road Marseilles, IL 61341-9757 RA05-33 10 CFR 50.36a April 29, 2005 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 LaSalle County Station, Units 1 and 2 Facility Operating License Nos. NPF-1 1 and NPF-1 8 NRC Docket Nos. 50-373 and 50-374

Subject:

2004 Annual Radioactive Effluent Release Report Enclosed is the Exelon Generation Company, LLC, LaSalle County Station 2004 Annual Radioactive Effluent Release Report, submitted in accordance with 10 CFR 50.36a, "Technical specifications on effluents from nuclear power reactors,"

paragraph (a)(2) and Technical Specification 5.6.3, 'Radioactive Effluent Release Report."

Should you have any questions concerning this letter, please contact Mr. Terrence Simpkin, Regulatory Assurance Manager, at (815) 415-2800.

Respectfully, Susan R. Landahl Site Vice President LaSalle County Station Attachment cc: Regional Administrator - NRC Region IlIl NRC Senior Resident Inspector - LaSalle County Station CAY313

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

Supplemental Information

1. Regulatory Limits
a. Gaseous Effluents
1) The air dose due to noble gases released in gaseous effluents, from each reactor unit, from the site shall be limited to the following:

a) During any calendar quarter: Less than or equal to 5 mrad for gamma radiation and less than or equal to 10 mrad for beta radiation, and b) During any calendar year: Less than or equal to 10 mrad for gamma radiation and less than or equal to 20 mrad for beta radiation.

2) The dose to an individual from radioiodincs and radioactive materials in particulate form, and radionuclides, other than noble gases, with half-lives greater than eight days in gaseous effluents released, from each reactor unit, from the site shall be limited to the following:

3) a) During any calendar quarter: Less than or equal to 7.5 mRems to any organ, and b) During any calendar year: Less than or equal to 15 mRems to any organ.

b. Liquid Effluents I) The dose or dose commitment to an individual from radioactive materials in liquid effluents released, from each reactor unit, from the site shall be limited:

a) During any calendar quarter: Less than or equal to 1.5 mRem to the total body and to less than or equal to 5 mRem to any organ, and b) During any calendar year: Less than or equal to 3 mRem to the total body and to less than or equal to 10 mRem to any organ.

c. Total Dose -

I) The dose or dose commitment to any member of the public, due to releases or radioactivity and radiation, from uranium fuel cycle sources shall be limited to less than or equal to 25 mRem to the body or any organ (except the thyroid, which shall be limited to less than or equal to 75 mRcm) over 12 consecutive months.

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

Supplemental Information (continued)

2. Allowable Concentrations -
a. Gaseous Effluents I) The dose rate due to radioactive materials released in gaseous effluents from the site shall be limited to the following:

a) For noble gases: Less than or equal to 500 mRem/year to the total body and less than or equal to 3000 mRem/year to the skin, and b) For all radioiodines and for all radioactive materials in particulate form, and radionuclides, other than noble gases, with half-lives greater than eight days: Less than or equal to 1500 mRem/year to any organ via the inhalation pathway.

b. Liquid Effluents I) The concentration of radioactive material released from the site shall be limited to ten (10) times the concentrations specified in 10 CFR Part 20, Appendix B, Table 11, Column 2 for radionuclides other than dissolved or entrained noble gases. For dissolved or entrained noble gases, the concentration shall be limited to the following:

Nuclide DWC (ici/ml)

Kr-85m 2.00E-04 Kr-85 5.00E-04 Kr-87 4.OOE-05 Kr-88 9.00E-05 Ar-41 7.00E-05 Xe-131m 7.00E-04 Xe-133m 5.00E-04 Xe-133 6.OOE-04 Xe-135m 2.00E-04 Xe-135 2.00E-04

3. Average Energy Not applicable - average energy is no longer used to determine dose to the public.
4. Measurements and Approximations of Total Radioactivity
a. Gaseous Effluents
1) Containment Vent and Purge System is sampled by grab sample which is analyzed for principal gamma emitters and H-3.
2) Main Vent Stack is sampled by grab sample, which is analyzed for principal gamma emitters and H-3.
3) Standby Gas Treatment System is sampled by grab sample, which is analyzed for principal gamma emitters.

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

Supplemental Information (continued)

4) All release types as listed in I and 2 above, at the vent stack and as listed in 3 above, at the Standby Gas Treatment System whenever there is flow, are continuously sampled by charcoal cartridge and particulate filter paper, which are analyzed for iodines and principal gamma emitters. Particulate filter papers are composited and analyzed for gross alpha, Sr-89 and Sr-90. Noble gases, gross beta and gamma are continuously monitored by noble gas monitors for the vent stack and the standby gas treatment system.
b. Liquid Effluents I) Batch waste release tanks are sampled each batch for principal gamma emitters, 1-131, dissolved and entrained noble gases, H-3, gross alpha, Sr-89, Sr-90 and Fe-55.
2) Continuous releases are sampled continuously in proportion to the rate of flow of the effluent stream and by grab sample. Samples are analyzed for principal gamma emitters, 1-131, dissolved and entrained noble gases, H-3, gross alpha, Sr-89, Sr-90 and Fe-55.
5. Batch Releases
a. Gaseous
1) Number of batch releases: None
2) Total time period for batch releases: N/A
3) Maximum time period for a batch release: N/A
4) Average time period for batch releases: N/A
5) Minimum time period for a batch release: N/A
b. Liquid
1) Number of batch releases: None
2) Total time period for batch releases: Min. N/A
3) Maximum time period for a batch release: Min. N/A
4) Average time period for batch releases: Min. N/A
5) Minimum time period for a batch release: Min. N/A
6) Average stream flow during periods of release of effluent into a flowing stream: gpm N/A

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

Supplemental Information (continued)

6. Abnormal Releases
a. Gaseous
1) Number of releases: None
2) Total activity released: N/A
b. Liquid
1) Number of releases: None
2) Total activity released: N/A
7. Process Control Program There were no changes to the Process Control Program during this time period.
8. Effluent Monitoring Instrumentation timeclocks and sample anomalies.

Time clocks:

There were no effluent monitoring time clocks exceeded in 2004 Sample anomalies:

During refueling outage LIRIO, 1-131 was detected, at levels slightly above LLD, via analysis of the Waste Water Treatment Facility effluent composite sample. This anomalous sample result was entered into the Station Corrective Action Program as AR# 195907 and is discussed in this section, as this sample is not required by the ODCM program.

Rather, the WWTF sample is obtained and analyzed daily when the facility is in operation and serves as a trending tool. The Cooling Pond Blowdown to the Illinois River is monitored via composite sampling and serves as the means for determining dose to the public. Detection of activity at the WWTF prompts in-plant "clean sump" sampling to identify and correct the source. In this case the source of 1-131 activity were traced back to the Unit One fire sump, a "clean" sump. Efforts to identify inputs into the fire sump as a source were unsuccessful. A review of medical records was also inconclusive, as some records did not specify an isotope. As a conservative measure a dose calculation was performed since the WWTF discharges to the LaSalle Cooling Lake. Utilizing the activity levels measured and the gallon throughput of the WWTF for the period, a total activity of 1.9 uCi's of 1-131 resulted in a calculated resultant maximum total body dose of 5.484 E-10 mRem (child) and Internal organ dose of 3.69E-10 mRem (infant thyroid). Again, this calculation was performed as a conservative measure. It should be noted that the LaSalle Cooling Lake does not serve as a drinking water supply and was closed to public access during the period in question (1/1 3/04 - 1/15/04). No positive activity was identified throughout the reporting period in ODCM required Pond Blowdown composite samples. LaSalle Cooling Lake REMP samples were reviewed following the occurrence and found to reveal no adverse affects.

9. Offsite Dose Calculation Manual Revisions.

No revisions were made to the LaSalle ODCM during the reporting period

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

UNITS ONE AND TWO DOCKET NUMBERS 50-373 AND 50-374 GASEOUS EFFLUENTS-SUMMATION OF ALL RELEASES

. lEstimated I Units I Ist Qtr I 2nd Qtr I 3rd Qtr l 4th Qtr lTotal Error % l A. Fission and Activation Gas Releases 1.Total Release Activity Ci 3.45E+03 2.85E+03 2.36E+03 2.63E+03 3.50E+01

2. Average Release Rate uCi/sec 4.39E+02 3.62E+02 l _2.97E+02 l 3.31E+02l
3. Percent of Technical Specification  %*
  • Limit B. Iodine Releases 1.Total 1-131 Activity Ci 3.64E-01 2.68E-01 2.62E-01 2.83E-01 3.50E+01
2. Average Release Rate uCi/sec 4.63E-02 3.41 E-02 3.30E-02 3.56E-02
3. Percent of Technical Specification  %/ * ,

Lim itI _ _ __ __ I_ _ __

C. Particulate (> 8 day half-life) Releases

1. Gross Activity Ci 8.13E 03 6.48E-03 8.36E-03 9.21 E-03 3.30E+01
2. Average Release Rate uCi/sec 1.03E-03 l 8.24E-04 1.05E-03 1.16E-03
3. Percent of Technical Specification  %

Limit

3. Gross Alpha Activity Ci <I.OE-I1 <I.OOE-11 <I.OOE-11 <I.OOE-11 D. Tritium Releases 1.Total Release Activity Ci 8.15E+00 3.28E+01 1.29E+01 2.43E+01 2.10E+01
2. Average Release Rate uCi/sec 1.04E+00 4.17E+00 1.62E+00 3.06E+oo
3. Percent of Technical Specification  % l
  • I *
  • Lim it I _ _ I _ _ _ I _ _ _ I I_ _

"*" This information is contained in the Radiological Impact on Man section of the report.

"<" Indicates activity of sample is less than LLD given in uCi/ml

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

GASEOUS EFFLUENTS-ELEVATED RELEASE Unit I and Unit 2 Continuous Mode I Units l ' Qtr I 2nd Qtr l 3d Qtr I 4th Qtr I. Fission and Activation Gas Releases Ar-41 Ci 1.97E-04 <1.OOe-4 <1.OOe-4 <1.OOe-4 Kr-85 Ci <1.OOe-4 <1.OOe-4 <1.OOe-4 <1.OOe-4 Kr-85m Ci 5.29E+02 7.27E+02 6.1OE+02 6.64E+02 Kr-87 Ci 1.42E+02 2.16E+02 1.44E+02 1.75E+02 Kr-88 Ci 8.58E+02 1.19E+03 9.60E+02 1.04E+03 Xe-131m Ci <1.OOe-4 <1.OOe-4 <1.OOe-4 <1.OOe-4 Xe-133 Ci 8.71 E+02 6.40E+02 5.62E+02 6.07E+02 Xe-133m Ci <1.00e-4 <1.00e-4 <1.00e-4 <1.00e-4 Xe-135 Ci 7.22E+02 2.27E+01 2.65E+01 2.84E+01 Xe-135m Ci 3.17E+02 5.66E+01 5.53E+01 5.48E+01 Xe-138 Ci 1.58E+01 <1.OOe-4 <1.OOe-4 6.OOE+01 TOTAL Ci 3.45E+03 2.85E+03 2.36E+03 2.63E+03

2. Iodine Releases 1-131 Ci 8.90E-02 3.88E-02 3.72E-02 3.73E-02 1-132 Ci 2.98E-02 4.47E-02 3.61 E-02 4.04E-02 1-133 Ci 1.42E-01 9.51 E-02 9.59E-02 1.06E-01 1-134 Ci <1.OOe-11 <1.OOe-11 <1.OOe-11 <1.OOe-11 1-135 Ci 1.03E-01 8.89E-02 9.28E-02 9.92E-02 TOTAL IODINE Ci 3.64E-01 2.68E-01 2.62E-01 2.83E-01 TOTAL 1-131,1-133,I-135 Ci 3.34E-01 2.23E-01 2.26E-01 2.43E-01
3. Particulate (> 8 day half-life) Releases Cr-51 Ci <1.OOe-11 <1.00e-11 <1.OOe-11 <1.OOe-11 Mn-54 Ci <1.OOe-11 <1.OOe-11 2.27E-05 <1.OOe-11 Co-57 Ci <1.OOe-11 <1.OOe-11 <1.OOe-11 <1.OOe-11 Fe-55 Ci <1.OOe-1i <1.OOe-11 <1.OOe-11 <1.OOe-11 Co-58 Ci <1.OOe-11 <1.OOe-11 <1.OOe-11 <1.OOe-11 Fe-59 Ci <1.OOe-11 <1.OOe-11 <1.OOe-11 <1.OOe-11 Co-60 Ci 2.91E-04 7.70E-05 2.70E-04 2.15E-04 Zn-65 Ci <1.OOe-11 <1.OOe-11 <1.00e-11 <1.OOe-11 Sr-89 Ci 2.99E-03 2.86E-03 3.70E-03 4.36E-03 Sr-90 Ci <1.OOe-1i <1.OOe-11 <1.OOe-11 <1.OOe-11 Zr-95 Ci <1.OOe-11 <1.OOe-11 <1.OOe-11 <1.OOe-11 Mo-99 Ci <1.OOe-11 <1.OOe-11 <1.OOe-11 <1.OOe-11 Ru-103 Ci <1.OOe-1i <1.OOe-11 <1.OOe-11 <1.OOe-11 Sn-117m Ci <1.OOe-11 <1.OOe-11I <1.OOe-11 <1.OOe-11 Cs-134 Ci <1.OOe-11 <1.OOe-11 <1.OOe-11 <1.OOe-11 Cs-137 Ci <1.OOe-11 <1.OOe-11 <1.OOe-11 1.61E-05 Ba\La-140 Ci 4.64E-03 3.54E-03 4.37E-03 4.62E-03 Ce-141 Ci 2.04E-04 <1.OOe-11 <1.OOe-11 <1.OOe-11 Ce-144 Ci <1.OOe-11 <1.OOe-11 <1.OOe-11 <1.OOe-11 TOTALPARTICULATES Ci 8.13E-03 6.48E-03 8.36E-03 9.21E-03
4. Tritium Releases 1.Total Release Activity I Ci I 8.15E+00l 3.28E+01 I 1.29E+01 I 2.43E+01

"<" Indicates activity of sample is less than LLD given in uCi/mI

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

LIQUID RELEASES UNIT I and UNIT 2 SUMMATION OF ALL LIQUID RELEASES Estimated I Units I 1st Qtr I 2nd Qtr I 3rd Qtr I 4th Qtr Total Error %

A. Fission and Activation Products

1. Total Activity Released Ci <LLD <LLD <LLD <LLD N/A
2. Average Concentration Released uCi/mi <LLD <LLD <LLD <LLD,
3. Percent of Applicable Limit I B. Tritium
1. Total Activity Released
2. Average Concentration Released J Ci uCi/ml

<LLD,

<LLD

<LLD

<LLD l

<LLD

<LLD l <LLD, l<LLD N/A

3. Percent of Applicable Limit l _ __ 1 I
  • 1 C. Dissolved Noble Gases I. Total Activity Released Ci <LLD <LLD <LLD <LLD N/A
2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD
3. Percent of Applicable Limit I _*

D. Gross Alpha

1. Total Activity Released (estimate) Ci <LLD <LLD <LLD <LLD N/A
2. Average Concentration Released uCi/mi <LLD, <LLD <LLD <LLD
3. Percent of Applicable Limit I lE. Volume of Liquid Waste to Discharge liters 0.OOE+00 0.OOE+0l 0.OOE+00 0.00E+00 N/A IF. Volume of Dilution Water liters l0.00E+00 l.OO

.E+00 l00.OOE+00 N/A

"*" This information is contained in the Radiological Impact on Man section of the report.

"<" Indicates activity of sample is less than LLD given in uCi/mI

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

  • LIQUID RELEASES UNIT I and UNIT 2 BATCH MODE lNuclides From Batch Releases Units I1st Qtr I 2nd Qtr I 3rd Qtr I 4th Qtr H-3 Ci <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD Ag-110mn Ci <LLD <LLD <LLD <LLD Sb-122 Ci <LLD <LLD <LLD <LLD Sb-124 Ci <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD Ba\La-140 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD W-187 Ci <LLD <LLD <LLD <LLD TOTAL Ci None None None None Xe-131 m Ci <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD Xe-135m. Ci <LLD <LLD <LLD <LLD TOTAL Ci None None None None

"<" Indicates activity of sample is less than LLD given in uCi/mI

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

LIQUID RELEASES UNIT 1 and UNIT 2 CONTINUOUS MODE lNuclides From Continuous Releases Units 1st Qtr 2nd Qtr 3rd Qtr I 4th Qtr Gross Alpha Ci <I.OOE-07 <I.OOE-07 <I.OOE-07 <I.OOE-07 H-3 Ci <I.OOE-05 <I.OOE-05 <I.OOE-05 <1.OOE-05 Cr-51 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Mn-54 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.00E-07 Fe-55 Ci <I1.OOE-06 <I.OOE-06 <I.OOE-06 <11.OOE-06 Co-58 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.00E-07 Fc-59 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Co-60 Ci <5.00E-07 <5.OOE-07 <5.00E-07 <5.OOE-07 Zn-65 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.00E-07 Sr-89 Ci <5.OOE-08 <5.OOE-08 <5.OOE-08 <5.OOE-08 Sr-90 Ci <5.OOE-08 <5.OOE-08 <5.OOE-08 <5.OOE-08 Nb-95 Ci <5.OOE-07 <5.OOE-07 <5.00E-07 <5.OOE-07 Zr-95 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Mo-99 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Tc-99m Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Ag- 1Oim Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Sb- 122 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Sb- 124 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 1-131 Ci <I.OOE-06 <I.OOE-06 <I.OOE-06 <I.OOE-06 Cs-134 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Cs-137 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Ba\La-140 Ci <5.OOE-07 <5.00E-07 <5.OOE-07 <5.OOE-07 Ce-141 Ci <5.OOE-07 <5.00E-07 <5.OOE-07 <5.00E-07 Cc- 144 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 W-187 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 TOTAL Ci <LLD <LLD <LLD <LLD Xe-131 m Ci <I.OOE-05 <I1.OOE-05 <i.OOE-05 <I.OOE-05 Xe-133 Ci <I1.OOE-05 <I1.OOE-05 <I.OOE-05 <I.OOE-05 Xe-133m Ci <I .OOE-05 <I .OOE-05 <I .OOE-05 <I .OOE-05 Xe-135 Ci <I.OOE-05 <I.OOE-05 <I.OOE-05 <I.OOE-05 Xe-135m Ci <1.OOE-05 <I.OOE-05 <I.OOE-05 <1.OOE-05 TOTAL Ci <LLD <LLD <LLD <LLD

"<" Indicates activity of sample is less than LLD given in uCi/mI

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FIRST QUARTER A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL

1. Spent resins, filter sludges, evaporator bottoms, etc.
a. Quantity shipped cu.m. 0.OOE+00
b. Total activity Ci 0.00E+00
c. Major nuclides (estimate %) N/A
d. Shipment type N/A
2. Dry compressible waste, contaminated equipment, etc.
a. Quantity shipped cu.m. 4.35E+02
b. Total activity Ci 1.50E-01
c. Major nuclides (estimate %)

Mn-54 1.13E+01 Fe-55 1.36E+01 Co-60 4.55E+o1 Ni-63 2.08E+01 Zn-65 6.89E+00

d. Shipment type LSA

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FIRST QUARTER

3. Other
a. Quantity shipped cu.m. 7.25E+01
b. Total activity Ci 2.36E-02
c. Major nuclides (estimate %)

Mn-54 1.15E+01 Fe-55 1.37E+01 Co-60 4.53E+01 Ni-63 2.06E+01 Zn-65 7.02E+00

d. Shipment type LSA
4. Irradiated Components
a. Quantity shipped cu.m O.OOE+00
b. Total activity Ci 0.OOE+00
c. Major nuclides (estimate %) N/A
d. Number of shipments 0
e. Mode of Transportation N/A
f. Destination N/A
5. Solid Waste Disposition Number of Shipments Transportation Mode Destination 6 Truck ALARON Corporation 2 Truck Duratek-Bear Creek TOTAL THIS QUARTER 8 Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Jan-Dec) 2.50E+01 Estimated total error % for dry compressible waste, contaminated equipment, etc. (Jan-Dec) 2.50E+01 Estimated total error % for irradiated components (Jan-Dec) N/A B. IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS SECOND QUARTER A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL

1. Spent resins, filter sludges, evaporator bottoms, etc.
a. Quantity shipped cu.m. 7.44E+01
b. Total activity Ci 4.35E+01
c. Major nuclides (estimate %)

C-14 1.76E+01 Mn-54 I.1OE+01 Fe-55 1.79E+01 Co-60 4.88E+01 Cs-137 1.31E+00

d. Shipment type LSA
e. Solidification agent None
2. Dry compressible waste, contaminated equipment, etc.
a. Quantity shipped cu.m. 2.23E+02
b. Total activity Ci 6.60E-01
c. Major nuclides (estimate %)

Mn-54 9.40E+00 Fe-55 1.37E+01 Co-60 4.76E+01 Ni-63 2.28E+01 Zn-65 5.28E+00

d. Shipment type LSA

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS SECOND QUARTER

3. Other
a. Quantity shipped cu.m. 3.79E+01
b. Total activity Ci 2.29E+04 C. Major nuclides (estimate %/o)

Mn-54 2.04E+00 Fe-55 4.65E+01 Co-60 4.68E+01 Ni-63 3.78E+o0

d. Shipment type LSA, Type B
4. Irradiated Components
a. Quantity shipped cu.m 0.00E+00
b. Total activity Ci 0.OOE+00
c. Major nuclides (estimate %) N/A
d. Number of shipments N/A
c. Mode of Transportation N/A
f. Destination N/A
5. Solid Waste Disposition Number of Shipments Transportation Mode Destination 1 Truck Barnwell waste Management Facility 8 Truck Duratek-Bear Creek, TN 10 Truck Envirocare of Utah TOTAL THIS QUARTER 19 Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (an-Dec) 2.50E+0 I Estimated total error % for dry compressible waste, contaminated equipment, etc. (Jan-Dec) 2.50E+01 Estimated total error % for irradiated components (Jan-Dec) N/A B. IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT-(2004)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS THIRD QUARTER A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL

1. Spent resins, filter sludges, evaporator bottoms, etc.
a. Quantity shipped cu.m. 2.99E+01
b. Total activity Ci 1.63E+01
c. Major nuclides (estimate %)

C-14 2.39E+01 Mn-54 1.01E+01 Fe-55 2.22E+01 Co-60 4.14E+01

d. Shipment type LSA
e. Solidification agent N/A
2. Dry compressible waste, contaminated equipment, etc.
a. Quantity shipped cu.m. 3.41E+00
b. Total activity Ci 5.72E+01
c. Major nuclides (estimate %)

Mn-54 3.77E+00 Fe-55 2.30E+01 Co-60 5.71E+0I Zn-65 1.38E+01

d. Shipment type LSA

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS THIRD QUARTER

3. Other
a. Quantity shipped cu.m. 2.72E+01
b. Total activity Ci 7.84E+04 C. Major nuclides (estimate %)

Mn-54 1.75E+00 Fe-55 3.87E+01 Co-60 5.59E+01 Ni-63 3.08E+00

d. Shipment type LSA, Type B
4. Irradiated Components
a. Number of shipments 0
b. Mode of Transportation N/A C. Destination N/A
5. Solid Waste Disposition Number of Shipments Transportation Mode Destination 6 Truck Bamrwell Waste Management Facility 5 Truck Duratek-Bear Creek, TN 4 Truck Envirocare of Utah TOTAL THIS QUARTER 15 Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Jan-Dec) 2.50E+OI Estimated total error % for dry compressible waste, contaminated equipment, etc. (Jan-Dec) 2.50E+01 Estimated total error % for irradiated components (Jan-Dee) N/A B. IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FOURTH QUARTER A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL

1. *Spent resins, filter sludges, evaporator bottoms, etc.
a. Quantity shipped cu.m. 5.05E+01
b. Total activity Ci 3.59E+01
c. Major nuclides (estimate %/O)

C-14 6.61E+00 Fe-55 8.99E+00 Co-60 2.51 E+O1 Cs-134 1.76E+01 Cs-137 3.59E+01

d. Shipment type LSA, Limited Quantity
e. Solidification agent None
2. Dry compressible waste, contaminated equipment, etc.
a. Quantity shipped cu.m. 5.86E+02
b. Total activity Ci 1.26E+00
c. Major nuclides (estimate %)

H-3 9.69E+00 Mn-54 1.88E+01 Fe-55 1.73E+01 Co-60 4.97E+01 Ni-63 2.10E+00

d. Shipment type LSA

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FOURTH QUARTER

3. Other
a. Quantity shipped cu.m. 1.91 E+02
b. Total activity Ci 4.11 E-02 C. 'Major nuclides (estimate %)

Mn-54 1.60E+01 Fe-55 4.57E+01 Co-60 1.87E+01 Cs-137 2.38E+00 Ce-144 1.52E+01

d. Shipment type LSA
4. Irradiated Components
a. Number of shipments 0
b. Mode of Transportation N/A C. Destination N/A
5. Solid Waste Disposition Number of Shipments Transportation Mode Destination 10 Truck ALARON Corporation 2 Truck Barnwvell Waste Management Facility 5 Truck Duratek-Bear Creek, TN Truck Duratek-Gallaher Rd 8 Truck Envirocare of Utah TOTAL THIS QUARTER 26 Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Jan-Dec) 2.50E+01 Estimated total error % for dry compressible wvaste, contaminated equipment, etc. (Jan-Dec) 2.50E+01 Estimated total error % for other irradiated components (Jan-Dec) N/A B. IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RESULTING FROM RELEASES AND COMPLIANCE STATUS

  • DELIVER TO CHEMISTRY
  • AIRBORNE Effluents- IOCFR50 Listing 06-mar-2005 02:23:55 STATION: LASALLE STATION UNIT: 1 PERIOD: 01/01/04 12/31/04 NAME: ODCMLAS REPORT: ANNUAL MODE: ACTUAL

N LASALLE STATION UNIT ONE ACTUAL 2004 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 03/06/05 INFANT RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 4.44E-02 5.54E-02 4.43E-02 4.96E-02 1. 94E-01 (MRAD) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

BETA AIR 1.94E-03 1.92E-03 1.51E-03 1.73E-03 7.10E-03 (MRAD) (ESE ) (ESE ) (ESE ) (ESE ) (ESE )

TOT. BODY 3.35E-02 4.19E-02 3.35E-02 3.75E-02 1.46E-01 (MREM) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

SKIN 3.56E-02 4.42E-02 3.53E-02 3.95E-02 1.55E-01 (MREM) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

ORGAN 1.65E-03 6.89E-02 9.17E-02 3.08E-02 1.93E-01 (MREM) (ESE ) (ESE ) (ESE ) (ESE ) (ESE )

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2004 I

COMPLIANCE STATUS - 10CFR 50 APP. I INFANT RECEPTOR


- OF APP I. ------------

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I GAMMA AIR (MRAD) 5.0 0.89 1.11 0.89 0.99 10.0 1.94 BETA AIR (MRAD) 10.0 0.02 0.02 0.02 0.02 20.0 0.04 TOT. BODY (MREM) 2.5 1.34 1.68 1.34 1.50 5.0 2.93 SKIN (MREM) 7.5 0.47 0.59 0.47 0.53 15.0 1.03 ORGAN (MREM) 7.5 0.02 0.92 1.22 0.41 15.0 1.29 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2004 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 03/06/05 CHILD RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 4.44E-02 5.54E-02 4.43E-02 4.96E-02 1.94E-01 (MRAD) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

BETA AIR 1.94E-03 1.92E-03 1.51E-03 1.73E-03 7.10E-03 (MRAD) (ESE ) (ESE ) (ESE ) (ESE ) (ESE )

TOT. BODY 3.35E-02 4.19E-02 3.35E-02 3.75E-02 1.46E-01 (MREM) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

SKIN 3.56E-02 4.42E-02 3.53E-02 3.95E-02 1.55E-01 (MREM) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

ORGAN 1.42E-03 7.83E-02 9.57E-02 3.45E-02 2.10E-01 (MREM) (ESE ) (NNE ) (ESE ) (NNE ) (ESE )

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2004 COMPLIANCE STATUS - 10CFR 50 APP. I CHILD RECEPTOR


 % OF APP I. ------------

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY t OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I GAMMA AIR (MRAD) 5.0 0.89 1.11 0.89 0.99 10.0 1.94 BETA AIR (MRAD) 10.0 0.02 0.02 0.02 0.02 20.0 0.04 TOT. BODY (MREM) 2.5 1.34 1.68 1.34 1.50 5.0 2.93 SKIN (MREM) 7.5 0.47 0.59 0.47 0.53 15.0 1.03 ORGAN (MREM) 7.5 0.02 1.04 1.28 0.46 15.0 1.40 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2004 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 03/06/05 TEENAGER RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 4.44E-02 5.54E-02 4.43E-02 4.96E-02 1.94E-01 (MRAD) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

BETA AIR 1.94E-03 1.92E-03 1.51E-03 1.73E-03 7.10E-03 (MRAD) (ESE ) (ESE ) (ESE ) (ESE ) (ESE )

TOT. BODY 3.35E-02 4.19E-02 3.35E-02 3.75E-02 1.46E-01 (MREM) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

SKIN 3.56E-02 4.42E-02 3.53E-02 3.95E-02 1.55E-01 (MREM) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

ORGAN 1.14E-03 4.83E-02 5.80E-02 2.14E-02 1.29E-01 (MREM) (NNE ) (NNE ) (NNE ) (NNE ) (NNE )

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2004 COMPLIANCE STATUS - 10CFR 50 APP. I TEENAGER RECEPTOR


 % OF APP I. ------------

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I GAMMA AIR (MRAD) 5.0 0.89 1.11 0.89 0.99 10.0 1.94 BETA AIR (MRAD) 10.0 0.02 0.02 0.02 0.02 20.0 0.04 TOT. BODY (MREM) 2.5 1.34 1.68 1.34 1.50 5.0 2.93 SKIN (MREM) 7.5 0.47 0.59 0.47 0.53 15.0 1.03 ORGAN (MREM) 7.5 0.02 0.64 0.77 0.29 15.0 0.86 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2004 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 03/06/05 ADULT RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 4.44E-02 5.54E-02 4.43E-02 4.96E-02 1.94E-01 (MRAD) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

BETA AIR 1.94E-03 1.92E-03 1.51E-03 1.73E-03 7.10E-03 (MRAD) (ESE ) (ESE ) (ESE ) (ESE ) (ESE )

TOT. BODY 3.35E-02 4.19E-02 3.35E-02 3.75E-02 1.46E-01 (MREM) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

SKIN 3.56E-02 4.42E-02 3.53E-02 3.95E-02 1.55E-01 (MREM) (WSW ) (WSW ) (WSW ) (WSW ) (WSW )

ORGAN 1.11E-03 4.93E-02 6.01E-02 2.20E-02 1.33E-01 (MREM) (NNE ) (NNE ) (NNE ) (NNE ) (NNE )

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2004 COMPLIANCE STATUS - 10CFR 50 APP. I ADULT RECEPTOR


 % OF APP I. ------------

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I GAMMA AIR (MRAD) 5.0 0.89 1.11 0.89 0.99 10.0 1.94 BETA AIR (MRAD) 10.0 0.02 0.02 0.02 0.02 20.0 0.04 TOT. BODY (MREM) 2.5 1.34 1.68 1.34 1.50 5.0 2.93 SKIN (MREM) 7.5 0.47 0.59 0.47 0.53 15.0 1.03 ORGAN (MREM) 7.5 0.01 0.66 0.80 0.29 15.0 0.88 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

  • DELIVER TO CHEMISTRY
  • AQUATIC Effluents- 10CFR5O Listing 03-jan-2005 15:13:42 STATION: LASALLE STATION UNIT: 1 PERIOD: 01/01/04 12/31/04 NAME: ODCMLAS REPORT: ANNUAL MODE: ACTUAL

LASALLE STATION UNIT ONE ACTUAL 2004 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 01/03/05 INFANT RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2004 COMPLIANCE STATUS - 10 CFR 50 APP. I


OF APP I. ------------

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I TOTAL BODY (MREM) 1.5 0.00 0.00 0.00 0.00 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE 2004 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM

  • PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 01/03/05 INFANT RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2004 COMPLIANCE STATUS - 40 CFR 141 TYPE IANNUAL LIMIT t OF LIMIT TOTAL 4.0 MREM 0.000 BODY INTERNAL 4.0 MREM 0.000 ORGAN
  • THIS CALCULATION OF DOSE IS BASED ON TECHNIQUES DESCRIBED IN THE COMMONWEALTH EDISON OFFSITE DOSE CALCULATION MANUAL. THESE TECHNIQUES DIFFER FROM THOSE DESCRIBED IN 40 CFR 141.

RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2004 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 01/03/05 CHILD RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.0E+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2004 COMPLIANCE STATUS - 10 CFR 50 APP. I


 % OF APP I. ------------

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I TOTAL BODY (MREM) 1.5 0.00 0.00 0.00 0.00 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE 2004 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM

  • PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 01/03/05 CHILD RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2004 COMPLIANCE STATUS - 40 CFR 141 TYPE ANNUAL LIMIT  % OF LIMIT TOTAL 4.0 MREM 0.000 BODY INTERNAL 4.0 MREM 0.000 ORGAN
  • THIS CALCULATION OF DOSE IS BASED ON TECHNIQUES DESCRIBED IN THE COMMONWEALTH EDISON OFFSITE DOSE CALCULATION MANUAL. THESE TECHNIQUES DIFFER FROM THOSE DESCRIBED IN 40 CFR 141.

RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2004 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 01/03/05 TEENAGER RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2004 COMPLIANCE STATUS - 10 CFR 50 APP. I


%OF APP I. ------------

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I TOTAL BODY (MREM) 1.5 0.00 0.00 0.00 0.00 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE 2004 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM

  • PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 01/03/05 TEENAGER RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL O.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 O.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2004 COMPLIANCE STATUS - 40 CFR 141 TYPE ANNUAL LIMIT  % OF LIMIT TOTAL 4.0 MREM 0.000 BODY INTERNAL 4.0 MREM 0.000 ORGAN
  • THIS CALCULATION OF DOSE IS BASED ON TECHNIQUES DESCRIBED IN THE COMMONWEALTH EDISON OFFSITE DOSE CALCULATION MANUAL. THESE TECHNIQUES DIFFER FROM THOSE DESCRIBED IN 40 CFR 141.

RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2004 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 01/03/05 ADULT RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2004 COMPLIANCE STATUS - 10 CFR 50 APP. I


 % OF APP I. ------------

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR .APR-JUN JUL-SEP OCT-DEC OBJ APP. I TOTAL BODY (MREM) 1.5 0.00 0.00 0.00 0.00 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

. - - .1 i

I LASALLE STATION UNIT ONE 2004 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM

  • PERIOD OF RELEASE - 01/01/04 TO 12/31/04 CALCULATED 01/03/05 ADULT RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+O0 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2004 COMPLIANCE STATUS - 40 CFR 141 TYPE ANNUAL LIMIT  % OF LIMIT TOTAL 4.0 MREM 0.000 BODY INTERNAL 4.0 MREM 0.000 ORGAN
  • THIS CALCULATION OF DOSE IS BASED ON TECHNIQUES DESCRIBED IN THE COMMONWEALTH EDISON OFFSITE DOSE CALCULATION MANUAL. THESE TECHNIQUES DIFFER FROM THOSE DESCRIBED IN 40 CFR 141.

RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE-VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

  • DELIVER TO CHEMISTRY
  • 06-mar-2005 02:29:06 Total Effective Dose Equivalent - IOCFR20 Listing STATION: LASALLE STATION UNIT: 1 PERIOD: 01/01/04 12/31/04 NAME: ODCMLAS REPORT: ANNUAL MODE: ACTUAL For ADULT dose calculations, the included pathways are:

INHALATION MILK PRODUCE VEGETABLES MEAT GROUND DEPOSITION FISH WATER SKYSHINE WHOLE BODY Airborne Effluents are complete from 01/01/04 to 12/31/04 Aquatic Effluents are complete from 01/01/04 to 12/31/04 Skyshine entries are complete from 01/01/04 to 12/31/04

LASALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/04 TO 12/31/04 CALCULATED 03/06/05

1. 10 CFR 20.1301 (a)(1) Compliance Total Effective Dose Equivalent, mrem/yr 4.85E-01 10 CFR 20.1301 (a)(1) limit mrem/yr 100.0

% of limit 0.49 Compliance Summary - 10CFR20 1st 2nd 3rd 4th  % of Qtr Qtr Qtr Qtr Limit TEDE 9.20E-02 1.36E-01 1.26E-01 1.31E-01 0.49 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/04 TO 12/31/04 CALCULATED 03/06/05

2. 10 CFR 20.1301 (d)/40 CFR 190 Compliance Dose Limit  % of (mrem) (mrem) Limit Whole Body Plume 1.46E-01 (DDE) Skyshine 3.24E-01 Ground 8.99E-04 Total 4.71E-01 25.0 1.89 Organ Dose Thyroid 1.19E-01 75.0 0.16 (CDE) Gonads 1.07E-02 25.0 0.04 Breast 1.07E-02 25.0 0.04 Lung 1.07E-02 25.0 0.04 Marrow 1.08E-02 25.0 0.04 Bone 1.08E-02 25.0 0.04 Remainder 1.10E-02 25.0 0.04 CEDE 1.40E-02 TEDE 4.85E-01 100.0 0.49 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995
  • DELIVER TO CHEMISTRY
  • 06-mar-2005 02:30:18 Total Effective Dose Equivalent - IOCFR20 Listing STATION: LASALLE STATION UNIT: 2 PERIOD: 01/01/04 12/31/04 NAME: ODCMLAS REPORT: ANNUAL MODE: ACTUAL For ADULT dose calculations, the included pathways are:

INHALATION MILK PRODUCE VEGETABLES MEAT GROUND DEPOSITION FISH WATER SKYSHINE WHOLE BODY Airborne Effluents are complete from to Aquatic Effluents are complete from to Skyshine entries are complete from 01/01/04 to 12/31/04

LASALLE STATION UNIT TWO 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/04 TO 12/31/04 CALCULATED 03/06/05

1. 10 CFR 20.1301 (a)(1) Compliance Total Effective Dose Equivalent, mrem/yr 3.53E-01 10 CFR 20.1301 (a)(1) limit mrem/yr 100. 0

% of limit 0.35 Compliance Siimmary - 10CFR20 lst 2nd 3rd 4th  % of Qtr Qtr Qtr Qtr Limit TEDE 8.91E-02 8.60E-02 8.81E-02 8.94E-02 0.35 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT TWO 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/04 TO 12/31/04 CALCULATED 03/06/05

2. 10 CFR 20.1301 (d)/40 CFR 190 Compliance Dose Limit t of (mrem) (mrem) Limit Whole Body Plume 0.OOE+00 (DDE) Skyshine 3.53E-01 Ground 0.OOE+00 Total 3.53E-01 25.0 1.41 Organ Dose Thyroid 0.0OE+00 75.0 0.00 (CDE) Gonads 0.OOE+00 25.0 0.00 Breast 0.OOE+00 25.0 0.00 Lung 0. OOE+00 25.0 0.00 Marrow 0. OOE+00 25.0 0.00 Bone 0. OOE+00 25.0 0.00 Remainder 0.OOE+00 25.0 0.00 CEDE 0.OOE+00 TEDE 3.53E-01 100.0 0.35 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2004)

METEOROLOGICAL DATA

MURRAY & TRETTEL, INC.

Wednesday February2nd, 2005 Mr. MiWe Martin Rad Protection LaSalle Station Exelon Nuclear 2601 N 215 Road Mirseilles, IL 61341 DearMr. Martin.

Enclosed are copies of the LaSalle Station meteorological site quarterlyjoint-frequency wind rose tables for 2004. They are being sent pursuant to the Specification for Meteorological Data and Meteorological Monitoring Services & Maintenance (METI), 3.3.2,333, METSPECS/18/15 and METSPECS/18/41, Table 2a, format of wind rose table.

At this time, we would lie to request the 2004 effluent data for yur nuclear plant. The effluent data is required to process the 2004 annual report on the Meteorological Monitoring Program as per Specification No. MET1 33.4.

In order to expedite the annual report generation, please forward the 2004 effluent data from your plant to:

  • TomrBegley Maray m rettel, Inc 600 Ffrst Bank Drive, Suite A Palatine, IL 60067 Fax.

1-847-963-0003 or E-maiL mt(weathercommand.com If you have any questions, please contact Tom Begley@ (847) 963-9000 x 175.

Sincrely Tom Begle Exelon Nuclear Project Manager Enclosures 600 FIREST BANK DRIVE, SUITE A

  • PALATINE, IL
  • 60067 PHONE: (847) 963.9000
  • FAX: (847) 963-0003 E-MAIL: MTOWEATHERCOMMAND.COM
  • INTERNET: HTTPo//WWW.WEATHERCO

LaSalle Nuclear Station Period of Record: January - March 2004 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Tot al N_____0__ 0---- 0---- 0---- --

0-- 0---- ---

N 0 0 0 0 0 0 0 D

NE 0 0 0 0 0 0 )

ENE 0 0 0 2 0 0

)

E 0 0 .0 0 0 0 ESE 0 0 0 0 0 0 C SE 0 0 0 0 0 0 C SSE . 0 0 0 0 3 0 3 S .0 0 0 1 3 2 6 SSW 0 0 0 1 3 0 4 SW 0 0 0 0 0 0 0 WSW 0 0 . 0 2 4 0 6 W 0 0 0 2 2 1 5 WNW 0 0 0 12 9 4 25 NW .0 0 0 0 1 3 4 NNW .0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 20 25

  • 10 55 Hours of calm in this stability class:. 0 Hours of missing wind .measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: January - March 2004 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 1 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 2 0 0 2 E 0 0 - 1 3 0 0 4 ESE 0 0 1 0 0 0 1 SE 0 0 1 0 0 0 1 SSE 0 .0 0 1 2 0 3 S 0 0 O' 1 0 0 1 SSW 0 0 1 3 0 0 4 SW 0 0 l. 4 0 0 5 WSW 0. 0 0 0 2 0 2 W 0 0 0 0 2 .0 2 WNW 0 0 1 3 0 5 9 NW 0 0 0 3 3 1 7 NNW 0 0 0 3 0 0 3 Variable 0 0 0 0 0 0 0 Total 0 0 6 24 9 6 45 Hours of calm in this stability class: . 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

-j LaSalle Nuclear Station Period of Record: January - March 2004 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 4 1 0 5 0

NNE 0 0 . 1 0 0 1 0

NE 0 0 1 0 0 1 0

ENE 0 0 1 1 0 2 0

-E 0 0 3 1 0 4 0

ESE 0 0 2 1. 0 3 0

SE 0 1 1 0 0 2 0

SSE 0 0 0 0 .0 0 S 0 0 0 . 0 3 _ 6 1 4 SSW 0 1 3 0 0 1 5 SW 0 0 1 3 2 0 6 WSW 0 0 3 0 1 0 4 W 0 0 5 6 1 2 14 WNW 0 0 4 8 1 1 14 NW 0 0 1 3 3 1 8 NNW 0 0 1 2 0 0 3 Variable 0 0 0 0 0 0 0 Total 0 2 31 26 11 76

  • Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: .0 Hours of missing stability measurements in all stability classes: 0

LaSalle-Nuclear Station Period of Record: January - March 2004 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 21 30 13 4 0 68 NNE 0 16 30 5 0 0 51 NE 0 8 13 14 4 0 39 ENE 0 4 13 12 8 9 46 E 0 . 7 23 14 11 0 55 ESE 1 12 .19 37 4 0 73 SE 1 1 14 5 .. 0 0 21 SSE 2 4 1 3 1 0 11 S 1 3 7 9 9 1 30 SSW 1 9 11 20 7 0 48 SW 0 2 13 11 6 0 32 WSW 1 7 14 11 4 3 40 W 2 7 22 30 10 5 76 WNW 1 12 28 53 13 18 125 NW 0 9 25 40 10 9 93 NNW 0 10 42 42 9. 2 105 Variable 0 0 0 0 0 0 0 Total 10 132 305 319 100 47 913 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: January - March 2004 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind, 4 Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 11 11 2 0 0 27 NNE 1 i5 10 4 0 0 30 NE 1 5 4 6 5 0 21 ENE 1 0 10 32 3 0 46 E 0 2 22 16 1 0 41 ESE 0 6 5 4 0 0 15 SE 2 8 13 16 0 0 39 SSE 2 5 12. 14 0 0 33 S 2 7 11 14 ,8 3 45 SSW 1 2 13 33 7 9 65 SW . 1 4 14 26 7 3 55 WSW 1 1 11 19 10 1 43 W 3 15 27 33 13 0 91 WNW 0 16 35 11 9 2 73 NW .2 8 21 7 0 0 38 NNW 2 13 4 16 0 0 35 Variable 0 0. 0 0 0 0 0 Total 22 118 223 253 63 18 697 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle.Nuclear Station Period of Record: January - March 2004 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 .8-12 13-18 19-24 > 24 Total N 0 2 0 0 0 0 2 NNE 0 0 0 0 0 0 0 NE 0 0 0 2 0 0 2 ENE 0 0 1 0 4 0 5 E 0 1 6 3 0 0 10 ESE 0 14 11 0 0 0 25'

.SE 3 5 7 2 . 0 0 17 SSE. 0 6 . 8 5 0 0 19 S 0 12 15 4 0 1 32 SSW 0 3 21 11 0 0 35 SW 0 8 10 13 0 0 31 WSW 0 9 16 13 0 0 38 W 0 5 23 4.. 0 0 32 WNW 0 8 5 5. 0 . 0 18 NW 1 6 2- 0 0 0 9 NNW 0 0 0 0 0 0 0 Variable . 0 0 0 0 0 0 0 Total 4 79 125 62 4 1 275 Hours of calm in this stability class: . 0 Hours of missing wind measurements in this stability-class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: January - March 2004 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N . 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 2 . 4 0 0 0 6 SE 0 2 5 0 . 0 0 7 SSE 2 11 11 0 0 0 24 S 0 8 11 0 0 0 19 SSW 0 3 8 0 0 0 11 SW 0 4 12 3 0 0 19 WSW 0 4 .2. 4 0 0 10 W 0 0 1 0 0 0 1 WNW 0 0 0 0 .0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 ,0. 0 0 Variable 0 0 0 0 0 0 0 Total 2 34 54 7 0 0 97 Hours of calm in this stability class: . 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: January - March 2004 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 1 1 NE 0 0 0 0 0 2 2 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 1 1 W 0 0 0 0 0 0 0 WNW 0 0 0 0 3 4 7 NW 0 0 0 0 0 0 0 NNW .0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0. 0 0 3 8 11 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

LaSalle Nuclear Station Period of Record: January - March 2004 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N . 0 0 0 1 2 0 3 NNE 0 0 0 1 2 0 3 NE 0 0 0 0 0 3 3 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 1 0 1 SSE 0 0 0 0 2 0 2 S 0 0 0 0 0 4 4 SSW 0 0 0 0 0 1 1 SW 0 0 0 0 0 0 0 WSW 0 0 0. 1 0 .0 1 W 0 0 0 0 1 4 5 WNW 0 0 0 0 0 . 5 5 NW 0 0 0 2 2 0 4 NNW 0 0 0 0 0 0 0 Variable 0 0 .0 0 0 0 0 Total 0 0 0 5 10 17 32 Hours of calm in this stability class: . 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

LaSalle Nuclear Station Period of Record: January - March 2004 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Tot.al

-_- - - - - - 7 ___ _ ----- -----

N 0 0 0 0 1 0 1 NNE 0 0 0 0 0 0 )

NE 0 0 0 1 0 1 ENE 0 0 0 4 0 6 1(

E 0 0 0 1 0 0 jL ESE 0 0 1 0 0 0 1 SE 0 0 0 1 1 0 2 SSE 0 0 0 0 3 0 3 S 0 0 0 0. 0 3 3 SSW 0 0 0 0 1 0 1 SW 0 0 0 0 0 0 0 WSW . 0 0 0 1 1 1 3 W 0 0 .0 0. 0 3 3 WNW. 0 0 0 5 0 1 6 NW 0 0 0 3 1 4 8 NNW 0 0 0 0 1 0 1 Variable 0 0 0 0 0 0 0 Total 0 0 1 16 9 19 45 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 4

LaSalle-Nuclear Station Period of Record: January - March 2004 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Tote.al N 1 10 19

  • 30 i1 7 78 NNE 0 7 26 24 4 0 61 NE 0 4 9 16 23 5 57 ENE 0 1 11 25 40 30 107 E 0 0 14 13 9 7 43 ESE 0 5 9 27 *34 2 77 SE 2 2 11 6 5 0 26 SSE 0 3 2 4 7 2 18 S 1 4 8 12 13 19 57 SSW 1 5 6 14 18 18 62 SW 0 1 2 19 15 14 51 WSW 1 5 13 11 8 15 53 W 2 9 13 22 28 30 104 WNW 0 7 9 52 46 65 179 NW 0 4 19 43 41 37 144 NNW 1 6 23 31 37. 7 105 Variable 0 0 0 0 0
  • 0 0 Total 9 73 194 349 339 258 1222 Hours of calm in this stability class: . 0 ' .

Hours of missing wind measurements in this stability class: 9 Hours of missing stability measurements in all stability classes: 4

LaSalle Nuclear Station Period of Record: January - March 2004 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 6 9 0 0 18 NNE 0 1 7 7 1 0 16 NE 0 1 2 7 0 0 10 ENE 0 4 5 4 2 3 18 E 0 2 6 8 6 1 23 ESE . 1 3 4 8 4 8 28 SE 0 4 0 3 2 16 25 SSE 0 3 1 8 4 16 32 S 6 3 2 6 16 19 52 SSW 0 0 5 5 13 52 75 SW 3 1 3 13 11 35 66 WSW 0 1 4 5 11 24 45 W 0 4 5 3 22 41- 75 WNW 1 6 5 12 24 20 68 NW 1 5 5 12 15 2 40 NNW .0 3 1 7 1 0 12 Variable 0 0 0 0 . 0 0 0 Total 13 43 61 117 132 237 603 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 5 Hours of missing stability measurements in all stability classes: 4

LaSalle Nuclear Station Period of Record: January - March 2004 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Tot al N 0 0 0 0 1 0 1 NNE 0 0 0 2 0 0 2 NE 0 1 0 1 0 0 2 ENE .0 1 1

  • 0 0 2 E 0 2 0 0 3 1 6 ESE 0 O0 ..0 2 1 2 5 SE 0 2 3 5 7 10 27 SSE 0 0 3 6 2 9 20 S 0 0 2 1 4 2 9 0

SSW 0 *2 2 .2 7 22- 35 SW 1 1 3 4 7 19 35 WSW 0* 0 1 0 1 10 12 W 0 .1 2 .3 7.- 8 12 31 WNW 0 0 1 1. 3 0 5 NW 0 1 1 1 0 0 3 NNW 0 2 0 2. 0 4 0

Variable 0 0 0 0 .0 0 Total 1 12 20 35 44 -87 199 Hours of calm in this stability class: .. 0 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 4

LaSalle Nuclear Station Period of Record: January - March 2004 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 1 1 SE 2 0 0 0 0 0 2 SSE 0 0 0 0 1 3 4 S '0 0 0 0 0 10 10 SSW 1 0 0 1 3 14 19 SW 0 0 0 0 0 3 3 WSW 0 0 0 0 4 3 7 W 0 3 0 0 0 0 3 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 3 3 0 1 8 34 49 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 1 0 1 NNE 0 0 1 4 0 0 5 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 *0 0 SE 0 0 0'~ 0 0 0 0 SSE 0 0 0 0 0 0 0 0 . 0 0 S 0 0 0 0 SSW 0 0 0 3 4 5 12 SW 0 0 0 6 6 10 22 WSW 0 0 3 1 1 5 0

W 0 3 1. 0 0 4 0

WNW 0 3 3 3 2 11 0

NW 0 0 2 2 1 .5 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0O 0 0 0 Total 0 0 . 7 22 17 19. 65 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle.Nuclear Station Period of Record: April - June 2004 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N . 0 0 3 2 1 0 6 NNE 0 0 8 1 0 0 9 NE 0 0 0 5 0 0 5 ENE 0 0 0 1 0 0 1 E 0 0 0 0 0 0 0 ESE 0 0 0 2 0 .0 2 SE 0 0 1 0 0 0 1 SSE 0 0 0 1 0 0 1 S 0 0 . 0 2 0 0 2 SSW 0 0 1 6 4 3 14 SW 0 2 1 10 5 2 20 WSW 0 2 2 8 3 1 16 W 0 0 8 S 1 1 15 WNW .0 2 8 1 0 . 1 12 NW 0 0 2 2 0 0 4 NNW 0 0 1 5 0. 0 6 Variable 0 0 0 0 0 0 0 Total 0 6 35 51 14 8 114 Hours of calm in this stability class: . 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 . > 24 Toti.al N 0 2 7 4 0 0 13 NNE 0 6 8 1 0 0 15 NE 0 1 1 2 1 0 5 ENE 0 0 1 0 1 0 2 E 0 0 3 0 . 0 0 3 ESE 0 0 2 0' 0 0 2 SE 0 0 2 3 0 0 5 SSE 0 I 4 1 .0 0 6 S 0 .0 - 'I' 1* 0 0 2 SSW 0 1 2 3 2 0 8 SW 0 0 10 11 4 1 26 WSW 1 .3 7 6 0 17 W 0 2 .10 3 2 0 17 WNW 0 S 12 2 0 0 19 NW 0 2 4 2 0 1 9 NNW 0 .2 *12 1 1 0 16 Variable 0 0 0 0 .0 0 0 Total 0 23 82 41 17 2 165 Hours of calm in this stability class: 0 .

'Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 17' 31 7 1 0 59 NNE 1 30 23 O' 1 0 55 NE 1 16 26 29 2 1 75 ENE 0 17 7 18 14 0 56 E 0 9 14 12 5 0 40

.ESE 1 8 7 12 1 0 29

  • SE 0 6 14 7 4 0 31 SSE 0 4 13 6 4 0 27 S 0 *8 13 5 0 0 26 SSW 0 .7 16 13 3 3 42 SW 0~ 9 20 24 17 3. 73 WSW 0 15 24 15 21 0 75 W 1 9 12 14 6 0 42 WNW 1 13 17 7. 2 2 42 NW 0 13 14 12 2 1 42 NNW 1 10 41 15 8 1 76 Variable 0 0 0 0 . 0 0 .90 Total 9 191 292 196 91 11 790 Hours of calm in this stability class: .. 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Tot al N 0 22 17 9 0 0 48 NNE 1 35 14 0 0 0 50 NE 2 7 18 3 0 0 30 ENE 0 4 11 3 0 0 18 E 0 18 39 7 1 0 65 ESE 2 12 11' 2 0 0 27 SE 1 10 9 15 1 0 36 SSE 0 6 6 3 1 0 16 S 0 6 26 6 3 0 41 SSW 1 10 34 17 6 6 74 SW 0 18 32 41. 5 6 102 WSW 1 7 13 12 1 1 35 W 0 6 7 6. 2 1 22 WNW. 0 7 9 7 3 1 27 NW 15 4 4 0 0 24 NNW .4 12 9 0 0 0 25 Variable 0 0 0 0 0 0 0 Total 13 195 . 259 135 23 15 640 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class - Moderately Stable. - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Tot al N 7 0 0 8 NNE 5 0 0 5 NE 1 0 0 1 ENE 0 0 0 1 E 8 4 0 13 ESE 14 4 0 16

  • SE 13 1 0 14 SSE 6 9 0 16 S 9 11
  • 10 32 SSW .5 14 7. 28 SW 8 12- 2 22 WSW 4 14 2 21 W 13 10 0* 26 WNW 20 I, 0 22 NW 5 5. 0 1 11 NNW 4 2 0 7 Variable 0 0 '. 0, 0 Total 15 119 87 21 1 0 *243 Hours of calm in this stability class: . 0 .

Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Tot. Jal N_____0__ 1---- ----- 0---- 0---- 0---- ---

N 0 1 0 0 0 0 I NNE 0 1 0 0 0 0 1.

NE 0 0 0 0 0 0 ENE 0 0 0 0 0 0(

E 1 0 0 0 0 0 I

'ESE 0 3 1 0 0 0 SE 0 8 0 0 0 0 E SSE 0 4 6 0 0 0 ICI S 0 2 10 0 0 0 12 SSW 0 2 14 2 0 0 18 SW 0 13 19 0. 0 0 32 WSW 0 7 16 0 0 0 23 W 1 15 9 1. 0 0 26 WNW. 2 15 4 0 0 0 21 NW 1 1 0 0 0 0 2 NNW .0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 5 72 79 3 0 0 159 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0o

LaSalle Nuclear Station Period of.Record: April - June 2004 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 .0 0O 0 0 NE 0 0 0 0 0 0 0 ENE 0 6 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0

  • SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0. 0 0 0

.0 SW 0 0 0 0 2 2 0

WSW 0 0 0 0 0 0 0

W 0 0 0 0 .0 0 0

WNW 0 0 0 .0 0 0 0

NW 0 0 0 0 0 0 0

NNW 0 0 0. 0 0 0 0

Variable 0 .0 0 0 0 0 Total 0 0 0 0 0 2 2 Hours of calm in this stability class: . 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 100

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 3 1 4 NNE 0 0 0 0 0 0 0 NE 0; 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0

.0 SE 0 0 0 0 0 0 0

SSE 0 0 0 0 .0 0 0

S 0 0 0 0 .0 0

SSW 0 0 0 0 3 3 0O SW 0 0 0 0 7 7 0

WSW .. 0 0 0 0 0 0 0

W 0 0 0 0 0 0 0

WNW 0 0 0 0 0 0 0

NW 0 0 0 0 0 0 0

NNW 0 0 0 0 0 0 0

Variable 0 0 0 0 0 0 0

Total 0 0 0 3 11 14 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability.class: 0 Hours of missing stability measurements in all stability classes: 100

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class.- Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind-Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N . 0 0 0 2 1 1 4 NNE 0 0 1 2 2 0 5 NE 0 0 0 1 1 0 2 ENE 0 0 0 1 0 0 1 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 .0 0 0 0 0 0 SS 0.00 00 S0 0 -0 1 1 0 2 SSW 0 0 0 0 4 7 11 SW 0 0 0 1 5 8 14 WSW 0 0 0 1 4 0 5 W 0 0 2 1 0 0 3 WNW 0 0 -1 3. 0 0 4 NW 0 0 0 0 2 0 2 NNW 0 0 0 1 0. 0 1 Variable 0 0 0 0 0 0 0 Total 0 0 4 14 20 16 54 Hours of calm in this stability class: . . 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all'stability classes: 100

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 8 27 25 7 9 78 NNE 1 8 39 19 4 1 72 NE 0 8 17 21 29 12 87 ENE 0 10 9 12 14 13 58 E 0 1 10 15 8 1 35 ESE 3 5 5 6 9 3 31 SE 0 2 9 13 4 6 34 SSE 0 1 8 4 2 3 18 S 0 7 12 8 4 5 36 SSW 0 4 .6 .10 16 33 69 SW 0 4 21 31 25 40 121 WSW . 0 9 18 17 29 31 104 W 0 6 22 19. 8 11. 66 WNW 1 6 27 21 8 13 76 NW 0 13 19 20 7 10 69 NNW .0 8 18 27 9 6 68 Variable 0 0 0 0 0 0 0 Total 7 100 267 268 183 197 1022 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 100

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 9 18 9 0 40 NNE 2 6 8 23 3 0 42 NE 1 3 14 22 9 0 49 ENE 0 4 9 13 7 2 35 E 1 6 7 15 11 5 45 ESE 0 1 6 7 6 4 24 SE 1. 1 3 1 . 3 14 23 SSE 0 2 4 5 7 1 19 S 0 2 8 9 9 25 53 SSW 0 5 7 17 20 69 118 SW 0 0 8 17 27 51 103 WSW 0 2 4 5 14 8 33 W 1 2 2 10- 7 .8 30 WNW 1 . 1 7 11 9 8 37 NW 1 3 5 9 6 2 26 NNW 0 3 8 9 4. 2 26 Variable 0 0 0 0 .0 0 0 Total 8 45 109 191 151 199 703 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 100

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 4 0 0 6 NNE 0 0 3 3 0 0 6 NE 0 2 2 1 0 0 5 ENE 0 0 2 0 0 0 2 E 0 0 1 1 0 0 2 ESE 1 1 6 4 2 0 14 SE 0 1 3 3 0 0 7 SSE 0 1 3 0 1 0 5 S 0 0 1 5 6 7 19 SSW 1 2 1 5 4 16 29 SW 0 0 1 3 6 15 25 WSW . 1 2 3 7 8 3 24 W 0 2 0 8 5 7 22 WNW . 0 2 3 8 7 2 22 NW 0 0 2 5 5 0 12 NNW 0 0 3 3 0 0 6 Variable 0 0 0 0 . 0 0 0 Total 3 13 36 60 44 50 206 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 100

LaSalle Nuclear Station Period of Record: April - June 2004 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0. 0 0 0 0 E 0 0 2 2 0 0 4 ESE 0 0* 1 0 0 0 1

  • SE 0 0 1 1 0 0 2 SSE . 0 0 0 0 1 0 1 S 0 0 6 0 3 3 6 SSW 0 0 I 0 3 7 11 SW 0 0 1 1 7 5 14 WSW 0 1 0 0 1 3 5 W 0 1 2 9 3 0 15 0 0 3 4. 5 1 13 NW 0 0 1 2 1 1 5 NNW 0 0 2 2 0 0 4 Variable 0 0 0 02 .0 0 0 Total 0 2 14 ..21 24 20 81 Hours of calm in this stability class: . 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 100

LaSalle Nuclear Station Period of Record: July - September 2004 stability Class - Extremely unstable - 200Ft-33Ft Delta-T (F) winds Measured at 33 Feet wind Speed (in mph) wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 2 0 3 NE 3 0 3 ENE 1 0 1 E 0 0 0 ESE 0 0 0 SE 0 0 0 SSE 1 0 1 S 0 0 0 SSW 10 0 12 SW 7 0 7 WSW 1 0 5 W 0 0 7 WNW .5 0 9 NW 0 0 0 NNW 0 0 0 variable 0 0 0 Total 0 0 30 16 2 0 48.

Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear station Period of Record: July - September 2004 stability class - Moderately unstable - 200Ft-33Ft Delta-T (F) winds Measured at 33 Feet wind speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N .8 0 0 '0 8 NNE 9 0 0 0 12 NE 5 2 0 0 9 ENE 5 1 0 0 6 E 0 0 0 0 0 ESE 3 0 0 0 3 SE 0 0 0 0 0 SSE 0 0 0 0 0 S 4 0 0 0 6 SSW 13 4 1 0 18 SW 14 2 0 0 18 WSWN 4 2 0 0 6 W 2 3 0 0 6 WNW 6 8 '0 0 16 NW 5 1 0 0 8 NNW 1 0 0 0 3 vari abl e 0 0 0 0 0 Total 0 16 79 23 1 0 119 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: ' 0 Hours of missing stability measurements in all stability classes: 0

Lasalle Nuclear Station Period of Record: July - September 2004 stability class - slightly unstable - 200Ft-33Ft Delta-T (F) winds Measured at 33 Feet wind speed (in mph)

Wind Di rection 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 9 1 0 14 NNE 0 8 5 1 0 14 NE 0 4 5 4 0 13 ENE 0 2 3 2 0 7 E 0 0 3 0 0 3 ESE 0 0 3 3 0 6 SE 0 1 4 1 0 6 SSE 0 5 2 1 0 8 S 0 10 6 5 0 21 SSW 0 2 11 1 0 15 SW 0 1 8 3 0 12 WSW 0 4 5 0 0 9 W 0 4 8 3 0 15 WNW 0 8 8 9 0 25 NW 0 4 5 0 o 9 NNW 0 1 6 3 0 10 variable 0 0 0 0 o o Total 0 58 91 37 1 0 187 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: .0

LaSalle Nuclear Station Period of Record: July - September 2004 Stability class - Neutral - 200Ft-33Ft Delta-T (F) winds Measured at 33 Feet wind speed (in mph)

Wind Di rection 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 39 25 1 0 0 65 NNE 2 32 23 0 0 0 57 NE 1 17 20 9 0 0 47 ENE 1 12 16 5 0 0 34 E 1 7 12 4 0 0 24 ESE 1 6 4 2 0 0 13 SE 3 12 12 6 0 0 33 SSE 2 21 17 8 0 0 48 S 2 33 . 24 11 0 0 70 SSW 3 18 9 5 0 0 35 SW 0 11 10 2 0 1 24 WSW 3 9 17 8 0 0 *37 W 2 8 25 8 0 0 43 WNW 2 17 17 6 1 0 43 NW 0 8 3 3 0 0 14 NNW 0 20 17 1 1 0 39 variable 0 0 0 0 0 0 0 Total 23 270 251 79 2 1 626 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Lasalle Nuclear station Period of Record: July - September 2004 stability class - slightly stable - 200Ft-33Ft Delta-T (F) winds Measured at 33 Feet wind speed (in mph)

Wind Di rection 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 42 13 1 0 0 58 NNE 0 34 8 0 0 0 42 NE 0 5 32 0 0 0 37 ENE 0 5 13 0 0 0 18 E 2 7 19 1 0 0 29 ESE 0 11 8 0 0 0 19 SE 1 13 6 0 0 0 20 SSE 4 <12 14 3 0 0. 33 S 1 12 23 5 1 0 42 SSW 4 28 10 1 0 0 43 SW 4 16 18 0 0 0 38 WSW 1 8 9 2 0 0 20 W 1 11 10 2 0 0 24 WNW 2 15 17 1 0 0 35 NW 3 18 8 1 0 0 30 NNW 3 8 8 1 0 0 20 variable 0 0 0 0 0 0 0 Total 28 245 216 18 1 0 508 Hours of calm in t:his stability class: O0 Hours of missing wtind measurements in this stability-class: 0 Hours of missing sstability measurements in all stability classes: 0

Lasalle Nuclear station Period of Record: July - September 2004 stability class - Moderately stable - 200Ft-33Ft Delta-T (F) winds Measured at 33 Feet wind speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 14 0 0 15 NNE 0 16 0 0 16 NE 2 0 0 0 2 ENE 0 2 0 0 2 E 2 12 12 0 26 ESE 2 12 0 0 14 SE 0 15 4 0 19 SSE 2 15 5 0 22 S 3 21 8 0 32 SSW 3 8 4 0 15 SW 1 13 5 0 19 WSW 4 16 9 0 30 W 5 10 9 0 24 WNW 1 11 2 0 14 NW 3 15 3 0, 21 NNW 4 2 0 0 . 6 variable 0 0 0 0 0 Total 33 182 61 0 277 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Lasalle Nuclear station Period of Record: July September 2004 stability class - Extremely Stable - 200Ft-33Ft Delta-T (F) winds Measured at 33 Feet Wind speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 4 0 0 5 NNE 1 0 0 0 1 NE o o 0 0 0 ENE O 0 0 0 0 E 1 3 4 0 8 ESE 1 21 4 0 26 SE 4 33 7 0 44 SSE 5 55 6 0 66 S 1 41 15 0 57 SSW 1 57 23 0 81 SW 3 36 6 0 45 WSW 1 25 4 0 30 W 1 18 3 0 22 WNW 2 29 1 0 32 NW 0 7 1 0 8 NNW 1 3 1 0 5 variable 0 0 0 0 0 Total 23 332 75 0 0 0 430 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: July - September 2004 stability class - Extremely unstable - 375Ft-33Ft Delta-T (F) winds Measured at 375 Feet wind speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 NNE 0 0 0 0 0 NE 0 0 0 0 0 ENE 0 0 0 0 0 E 0 0 0 0 0 ESE 0 0 0 0 0 SE 0 0 0 0 0 SSE *0 0 0 *0 0 S 0 0 0 0 0 SSW 0 0 0 0 0 SW 0 0 0 0 0 WSW 0 0 0 0 0 W 0 0 0 0 0 WNW 0 0 0 0 0 NW 0 0 0 0 0 NNW 0 0 0 0 0 variable 0 0 0 0 0 Total 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing.wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 11

LaSalle Nuclear Station Period of Record: July - September 2004 stability class - Moderately Unstable - 375Ft-33Ft Delta-T (F) winds Measured at 375 Feet wind speed (in mph)

Wind Di rection 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0

NNE 0 0 0 1 0

NE 0 0 0 0 0

ENE 0 0 0 0 0

E 0 0 0 0 0

ESE 0 0 0 0 0

SE 0 0 0 0 0

SSE 0  ; 0 0 0 0

S 0 0 0 0 0 0

SSW 0 0 0 0 0

SW 0 0 0 0 0

WSW 0 0 0 0 0

W 0 0 0 0 0

WNW 0 0 0 0 0

NW 0 0 0 0 0

NNW 0 0 0 0 variable 0 0 0 0 0 0 0 Total 0 0 0 0 1 0 1 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 11

LaSalle Nuclear station Period of Record: July - September 2004 stability class - slightly unstable - 375Ft-33Ft Delta-T (F) winds Measured at 375 Feet wind speed (in mph)

Wind Di recti on 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 5 NNE 0 2 1 9 NE 0 1 0 7 ENE 0 0 0 0 E 0 0 0 0 ESE 0 0 0 2 SE 0 0 0 0 SSE 0 1 0 1 S 0 1 0 1 SSW 0 7 0 12 SW 0 0 1 5 WSW 0 1 3 6 W 0 3 3 7 WNW 0 4 0 4 NW 0 0 1 1 NNW 0 0 0 0 variable 0 0 0 0 Total 0 0 21 29 9 1 60 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 11

LaSalle Nuclear station Period of Record: July - September 2004 Stability Class - Neutral - 375Ft-33Ft Delta-T (F) winds Measured at 375 Feet Wind Speed (in mph)

Wind Di recti on 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 21 21 29 2 0 73 NNE 1 16 31 26 10 0 84 NE 1 13 22 32 19 1 88 ENE 0 8 9 10 5 0 32 E 1 8 7 10 0 0 26 ESE 0 4 5 10 0 0 19 SE 3 10 14 8 7 0 42 SSE 2 20 21 12 8 0 63 S 0 21 35 30 7 1 94 SSW 1 11 25 23 9 5 74 SW 1 5 10 19 . 7 *0 42 WSW 1 7 17 16 10 2 53 W 1 15 18 21 14 2 71 WNW 0 .13 18 20 11 0 62 NW 0 10 20 14 2 1 47 NNW 1 10 26 10 1 0 48 Variable 0 0 0 0 0 0 0 Total 13 192 299 290 112 12 918 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 11

Lasalle Nuclear station Period of Record: July - September 2004 stability class - slightly stable - 375Ft-33Ft Delta-T (F) winds Measured at 375 Feet wind speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 7 5 13 9 0 34 NNE 0 2 13 33 15 0 63 NE 0 2 9 29 6 0 46 ENE 0 2 11 13 1 0 27 E 0 5 9 12 8 0 34 ESE 0 1 4 6 6 0 17 SE 1 2 9 8 3 0 23 SSE 0 6 6 13 8 3 36 S 0 5 4 10 9 19 47 SSW 0 1 13 19 18 5 56 SW 3 3 8 8 14 0 36 WSW 3 4 8 10 6 0 31 W 2 4 6 19 11 3 45 WNW 1 2 3 12 15 4 37 NW 2 7 16 8 11 3 47 NNW 0 7 11 6 2 1 27 Variable 0 0 0 0 0 0 0 Total 12 60 135 219 142 38 606 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 11

LaSalle Nuclear Station Period of Record: July - September 2004 stability class - Moderately stable - 375Ft-33Ft Delta-T (F) winds Measured at 375 Feet wind speed (in mph)

Wind Di rection 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 3 3 2 0 0 12 NNE 0 2 1 11 2 0 16 NE 2 0 1 5 6 0 14 ENE 0 1 3 2 0 0 6 E 4 3 6 3 0 17 ESE 0 2 6 15 7 0 30 SE 0 3 10 6 4 3 26 SSE 1 3 12 8 6 5 35 S 1 7 6 2 7 9 32 SSW 0 1 4 26 7 10 48 SW 1 4 2 13 13 4 37 wsw 0 6 7 3 2 0 18 W 0 7 9 11 9 0 36 WNW 0 4 7 8 8 0 27 NW 0 6 4 3 6 0 19 NNW 0 2 1 2 7 1 13 vari abl e 0 0 0 0 0 0 0 Total 10 55 79 123 87 32 386 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability-class: 0 Hours of missing stability measurements in all stability classes: 11

Lasalle Nuclear station Period of Record: Jul - September 2004 stability class - Extremely StabTe - 375Ft-33Ft Delta-T (F) winds Measured at 375 Feet Wind speed (in mph) wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 2 NNE 1 0 0 0 0 2 NE 0 1 0 0 0 1 ENE 0 0 0 0 0 0 E 0 0 0 0 0 0 ESE 0 0 0 1 2 3 SE 0 0 4 2 10 16 SSE 0 0 14 5 6 25 S .0 6 10 6 13 35 SSW 0 4 13 24 9 50 SW 0 4 18 19 11 53 WSW 1 7 1 1 1 11 W 2 1 2 0 0 6 WNW 3 1 3 1* 0 8 NW 0 2 2 2 0 6 NNW 2 1 1 1 0 5 variable 0 0 0 0 0 0 Total 5 9 27 68 62 52 223 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class:- .0 Hours of missing stability measurements in all stability classes: 11

LaSalle Nuclear Station Period of Record: October - December2004 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Tot4 :al N 0 0 0 0 0 0 0 NNE 0 0 0 .0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0* 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 I0 0 0 0 S 0 0 0* 0 0 0 0 SSW 0 0 0, 0 0

.0 0 SW 0 1 0 O'

.00 0 1 WSW 0 0 0 0 0 0 0 W 0 0. 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 0 NNW 0 0. 0 0 0 0 0 Variable 0 0 .0 0 0 0 0 Total 0 1 0 0 I Hours of calm in this stability class: . 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: October - December2004 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1. 1 0 0 2 NNE 0 0 0 0 0 0 0 NE 0 0 0 1 0 0 1 ENE 0 0 0 0 0 0 0 E 0 0 0 1 0 0 1

-ESE 0 0 0 1 0 0 1 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S .0 0 0 2 0 2 4 SSW 0 0 0 . 2 0 0 2 SW 0 0 0 3 0 0 3 WSW . 0 0 0 0 0 0 0 W 0 0 . ..0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 0 2 11 0 2 15 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: October - I)ecember2004 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (irn mph)

Wind Direction 1-3 4-7 8-12 13--18 19-24 > 24 Tot al N 0 0 2 5 1 0 8 NNE 0 0 0 0 0 0 0 NE 0 0 3 0 0 0 3 ENE 0 0 4 1 0 0 5 E 0 0 1 4 .0 .0 5 ESE 0 0 1 0 0 0 1 SE 0 0 1 0 0 0 1 SSE 0 0 0 0 0 0 0 S 0 0 0* .4 .0 2 6 SSW 0 2 1 0 0 3 SW 0 1 0 2 2 0 5 WSW 0 3 0 7 1 0 11 W 0 0 0 1: 2 0 3 WNW 0 0 4 0 0 5 NW 0 0 -4 0 0 0 4 NNW 0 0 1 1 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 6 22 26 6 2 62 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: October - IDecember2004 Stability Class - Neutral. - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (ix a mph)

Wind Direction 1-3 4-7 8-12 13.-18 19-24 > 24 Total N 2 13 29 34 11 0 89 NNE 0 26 13 8 1 0 48 NE 1, 7 29 13 5 1 56 ENE 0 3 38 22 13 2 78 E 0 6 39 24 4 .0 73 ESE 0 5 18 5 0 0 28 SE 0 3 9 5 0 0 17 SSE 0 4 13 17 0 0 34 S 1 9 11 23 14 .3 61 SSW 2 10 17 9 .3 0 41 SW 0 17 25 29 12 0 83 WSW 1 12 9 7 .6 4 39 W 0 7 . 21 27 8 4 67 WNW 1 8 39 39 15 4 106 NW ,0 9 13 24 5 6 57 NNW 0 12 42 46 20 4 124 Variable 0 0 0 0 0 0 0 Total 8 151

  • 365 332 117 28 1001 Hours of calm in this stability class: 0 ..'

Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: October - December2004 Stability Class - Slightly Stable . - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 12 13-18 19-24 > 24 Total N 2 24 . 8 0 0 0 34 NNE 3 19 11 0 0 0 33 NE 2 2 15 1 0 0 20 ENE 1 0 16 13 1 0 31 E 2 5 54 7 0 0 68 ESE 0 9 12 2 0 0 23

  • SE 1 1 17 4 .0 0 23 SSE 2 12 23 9 0 0 46 S 1 8 13 16 1 0 39 SSW 0 9 28 21 7 . 3 68 SW 2 3 19 30 14 0 68 WSW 2 10 11 13 2 1 39 W 1 6 18 8 1 0 34 WNW 2 4 10 18 17 16 67 NW 3 10 15 6 1 0 35 NNW 2 11 8 5 0. 0 26 Variable 0 0 0 0 0 0 0 Total 26 133 278 153 44 20 654 Hours of calm in this stability class: .. 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: October - IDecember2004 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (iin mph)

Wind Direction 1-3 4-7 8-12 13--18 19-24 > 24 Total N 0 14 1 0 0 0 15 NNE 0 5 0 0 0 0 5 NE 1 0 0 0 0 1 ENE 1 1 0 0 0 0 2 E 1 2 12 0 0 0 15 ESE 1 3 5 0 0 9

.0 SE 0 12 5 0 0 17 0

SSE 1 5 7 1 0 14 0

S 2 13 9 6 0 30 SSW 0 10 10 5 1 0 26 SW 2 10 28 7 0 0 47 WSW 0 4 25 3 0 0 32 W 1 5 17 0 0 0 23

'WNW. 0 3 8 1 0 0 12 NW 2 7 17 0 0 27 NNW 0 5 0 0 0 0 5 Variable 0 0 .0 0 0 0 0 Total 12 99 144 24 1 0 280 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: October - I)ecember2004 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (ir i mph)

Wind Direction 1-3 4-7 8-12 13- -18 19-24 > 24 Tot .al N 0 2 0 0 0 0 2 NNE 0 0 0 .0 0 0 0 NE 0 0 1.0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 5 6 0 0 0 11 ESE 0 6 3 0 0 0 9 SE 0 6 2 0 0 0 8 SSE 2 17 4 0 0 0 23 S 0 11 7" 1 0 19 I0 SSW 0 .5 20 0 0 0 25 0

SW 1 12 21 3 .0 0 37 0

WSW 1 4 12 1 0 18 0

W. 2 ~5 9 0. 0 16 0

WNW 0 7 2 0 0 9 0

NW 0 2 0 0 0 2 NNW 0 1 0 0 0 0 1 Variable 0 0 0 0 0 0 Total 6 83 86 5 0 0 180 Hours of calm in this stability class: . 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle Nuclear Station Period of Record: October - December2004 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 '> 24 Total N 0 0 0 0 0 0 NNE 0 0 0 0 0 0 NE. 0 0 0 0 0 0 ENE 0 0 0 0 0 E 0 0 0 0 0 0

ESE .0 0 0 0 0 0

SE 0 0 0 0 0 0

SSE 0 0 0' .0 0 0

S 0 0 0 0 0 0 0

SSW 0 0 0 0 0 0 SW 0 0 0 0 0 0 WSW 0 0 0 ,0 0 0' W 0 0 0 0 0 0 WNW 0 0 0 0 0 .0 NW 0 0 0 0 0 0 NNW 0 0 0 .0 0 0 Variable 0 0 0* 0 0 Total 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements-in all stability classes: 11

LaSalle Nuclear Station Period of Record: October - December2004 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N_____0__ 0---- 0---- 0---- 0---- 0---- 0----

N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW .0 0 0 0 0 0 0 NNW .o 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 11

LaSalle Nuclear Station Period of Record: October - December2004 Stability Class - Slightly Unstable. - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Tot,aal N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 1 0 1 E 0 0 0 1 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 O' 0 0 2 2 SSW 0 0 0 0 1 0 1 SW 0 0 0 0 2 0 2 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 .0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 .1 1 Variable 0 0 *0 0, 0 0 0 Total 0 0 0 *1 4 3 8

- Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 11

LaSalle Nuclear Station Period of Record: October - December2004 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 8 9 22 22 10 72 NNE 0 4 15 11 7 10 47 NE 0 0 14 40 14 9 77 ENE 0 3 14 51 21 16 105 E 1 1 17 26 13 7 65 ESE 0 3 6 11 3 0 23 SE 0 1 1 10 8 0 20

.SSE 1 3 9 12 9 4 38 S 1 *2 14 20 11 22 70 SSW 1 6 15 12 9 16 59 SW I 0 9 17 17 27 22 92 WSW 1 5 17 7 16 55 W 0 5 11 27 18 10 71 WNW 0 4 13 27 33 17 94 NW .0 4 14 20 32 25 95 NNW .1I 5 26 28 30 19 109 Variable 0 0 '0 0 0 0 0 Total 7 63 204 351 264 *203 1092 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 11'

LaSalle.Nuclear Station Period of Record: October - December2004 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7. 8-12 13-18 19-24 > 24 Total N 2 5 7 9 5 1 29 NNE 1 6 13 9 5 0 34 NE 0 4 12 3 10 0 29 ENE 1 2 7 11 11 1 33 E 2 5 6 24 19 6 62 ESE 0 4. 2 4 8 3 21

  • SE 0 2 4 3 9 4 22 SSE 2 .3 6 5 15 16 47 S 0 3 4 5 . 18 29 59 SSW 0 3 5 - 10 14 57 89 SW 0 3 6 7 17 43. 76 WSW 0 1 6 5 14 9 35 W. 0 0 2 8. 21 26 57 WNW 0 2 1 8 14 59 84 NW 0 0 7 6 8 22 NNW 0 4 8 7 5 6 30 Variable . 0 0 0 0 . 0 0 O 0
  • Total 8 47 90 125 191 268 729 Hours of calm in this stability class: . 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability.measurements in all stability.classes: 11

LaSalle Nuclear Station Period of Record: October - December2004 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 3 2 0 0 6 NNE 0 0 6 8 2 0 16 NE 0 0 1 1 3 0 5 ENE 0 .0 0 1 0 0 1 E 0 1 0 3 0 1 5 ESE 0 2 2 1 9 2 16 SE 0 2 1 2 9 6 20 SSE 0 1 5 1 4 .2 13 S 0 .2 1: 2 2 9 16 SSW 1 0 4 5 11 15 36 SW. 0 0 ..4 3. 14 26 47 WSW 0 0 0 1 11 11 23 W 0 .0 4 3. 10 4 21 WNW 0 0 4 .3 12 4 23 NW 0 0 1 0 8 2 11 NNW 0 0 7 4 1 13 Variable 0 0 0 0 0 0 0 Total 1 9 37 43 99

  • 83 272 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 11*

- - m LaSalle Nuclear Station Period of Record: October - December2004 Stability Class - Extremely Stable -.375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 1 0 0 1 ESE 0 0 0 0 2 0 2 SE 0 0 0 3 0 0 3 SSE 0 0 0 3 3 2 8 S 0 0 1 5 , 8 5 19 SSW 0 0 3 3 12 8 26 SW 0 0 0 3 0 9 12 WSW 0 0 1 4 3 6 14 W 0 0 1 2-. 1 1 5 WNW 0 1 0 0 1 . 1 3 NW 0 0 1 1 1 0 3 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 .0 0 0 Total 0 1 7 25 31 32 96 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 11