RA07-034, Annual Radioactive Effluent Release Report

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Annual Radioactive Effluent Release Report
ML071280586
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 04/30/2007
From: Landahl S
Exelon Generation Co, Exelon Nuclear
To:
Document Control Desk, NRC/NRR/ADRO
References
FOIA/PA-2010-0209, RA07-034
Download: ML071280586 (97)
v • d • e


Text

ExeleinT LaSalle Generating Station www.exeloncorp.com 2601 North 21st Road Nuclear Marseilles, I L 61341-9757 RA07-034 10 CFR 50.36a April 30, 2007 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:

2006 Annual Radioactive Effluent Release Report Enclosed is the Exelon Generation Company, LLC 2006 Annual Radioactive Effluent Release Report for LaSalle County Station, 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 III NRC Senior Resident Inspector

-LaSalle County Station EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)Supplemental Information 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 radioiodines 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 mRem to any organ, and b) During any calendar year: Less than or equal to 15 mRem 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 -1) 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 mRem)over 12 consecutive months.

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)Supplemental Information (continued)

2. Allowable Concentrations

-a. Gaseous Effluents 1) 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 1) 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 II, 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 (Rci/ml)Kr-85m 2.OOE-04 Kr-85 5.OOE-04 Kr-87 4.OOE-05 Kr-88 9.OOE-05 Ar-41 7.OOE-05 Xe-131m 7.OOE-04 Xe-t33m 5.OOE-04 Xe-133 6.OOE-04 Xe- 1 35m 2.OOE-04 Xe-135 2.OOE-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 (2006)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 1) 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, l-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 (2006)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 2006 Sample anomalies:

There were no sampling anomalies experienced during 2006 9. Offsite Dose Calculation Manual Revisions.

There were no revisions made to the ODCM in 2006. In response to the industry ground water tritium experience, LaSalle Station implemented a Radiological Groundwater Protection Program in 2006. This program is implemented via Exelon Corporate and LaSalle Station Site Specific Procedures and is outside the realm of, and in addition to, the Station's ODCM requirements.

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)UNITS ONE AND TWO DOCKET NUMBERS 50-373 AND 50-374 GASEOUS EFFLUENTS-SUMMATION OF ALL RELEASES Estimated Total Error %I Units I 1 st Qtr I 2nd Qtr I 3rd Qtr T 4th Qtr I A. Fission and Activation Gas Releases 1. Total Release Activity Ci 1.27E+03 7.48E+02 4.70E+02 4.35E+02 3.50E+01 2. Average Release Rate uCi/sec 1.63E+02 9.51 E+01 5.91 E+01 5.47E+01 3. Percent of Technical Specification

%* * *Limit B. Iodine Releases 1. Total 1- 131 Activity Ci 2.08E-02 7.35E-03 8.14E-03 8.OOE-03 3.50E+01 2. Average Release Rate uCi/sec 2.68E-03 9.36E-04 1.02E-03 1.01 E-03 3. Percent of Technical Specification

%* * * *Limit C. Particulate

(> 8 day half-life)

Releases I. Gross Activity Ci 1.55E-03 1.22E-03 1.82E-03 1.25E-03 3.30E+01 2. Average Release Rate uCi/sec 1.99E-04 1.55E-03 2.29E-04 1.57E-04 3. Percent of Technical Specification

%* * * *Limit 3. Gross Alpha Activity Ci <1.OOE-11

<1.OOE-11

<1.OOE-11

<I.OOE-11 D. Tritium Releases 1. Total Release Activity Ci 2.01 E+01 1.76E+01 2.02E+01 2.86E+01 2.10E+01 2. Average Release Rate uCi/sec 2.59E+00 2.24E+00 2.55E+00 3.60E+00 3. Percent of Technical Specification

%* * * *Limit"*" 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 (2006)GASEOUS EFFLUENTS-ELEVATED RELEASE Unit I and Unit 2 Continuous Mode Units I 1t Qtr 2nd Qtr 3rd Qtr 4th Qtr 1. Fission and Activation Gas Releases Ar-4 Ci <1.00e-4 <1.00e-4 <1.00e-4 <1.0Oe-4 Kr-85 Ci <1.00e-4 <1.00e-4 <1.00e-4 <1.00e-4 Kr-85m Ci 3.54E+02 1.93E+02 1.28E+02 1.36E+02 Kr-87 Ci 1.39E+02 3.08E+01 2.08E+01 <1.00e-4 Kr-88 Ci 5.58E+02 3.30E+02 1.77E+02 1.74E+02 Xe-131m Ci <1.00e-4 <1.00e-4 <1.00e-4 <1.00e-4 Xe- 133 Ci 2.03E+02 1.94E+02 1.44E+02 1.26E+02 Xe-133m Ci <1.00e-4 <1.00e-4 <1.00e-4 <1.00e-4 Xe-135 Ci 1.82E+01 <1.00e-4 <1.00e-4 <1.00e-4 Xe- 135m Ci 1.09E-04 <1 .0e-4 <1 .0e-4 <1.00e-4 Xe-138 Ci <1.00e-4 <1.00e-4 <1.00e-4 <1.00e-4 TOTAL Ci 1.27E+03 7.48E+02 4.70E+02 4.35E+02 2. Iodine Releases 1-131 Ci 2.08E-02 7.35E-03 8.14E-03 8.OOE-03 1-132 Ci 1.35E-02 1.40E-02 1.98E-02 1.58E-02 1-133 Ci 3.61 E-02 2.46E-02 2.76E-02 2.68E-02 1-134 Ci <1.00e-11

<1.00e-11

<1.00e-1l 2.69E-03 1-135 Ci 2.13E-02 1.95E-02 2.74E-02 2.14E-02 TOTAL IODINE Ci 9.17E-02 6.55E-02 8.28E-02 7.48E-02 TOTAL 1-131, 1-133, 1-135 Ci 7.83E-02 5.15E-02 6.31 E-02 5.62E-02 3. Particulate ( > 8 day half-life)

Releases Cr-51 Ci <1.00e-l1

<1.00e-1l

<1.00e-11

<1.00e-11 Mn-54 Ci 2.43E-05 <1.00e-1 1 <1.00e-1 1 <1.00e-1 1 Co-57 Ci <1.00e-l1

<1.00e-11

<1.00e-11

<1.00e-11 Fe-55 Ci <1.00e-11

<1.00e-11

<1.00e-1l

<1.00e-l1 Co-58 Ci <1.00e-11

<1.00e-11

<1.00e-11

<1.00e-1l Fe-59 Ci <1.00e-1l

<1.00e-11

<1.00e-1l

<1.00e-11 Co-60 Ci 2.49E-04 1.24E-04 9.92E-05 5.45E-05 Zn-65 Ci <1.00e-l1

<1.00e-11

<1.00e-11

<1.00e-l1 Sr-89 Ci 7.55E-04 4.84E-04 6.94E-04 5.79E-04 Sr-90 Ci <1.00e-11

<1.00e-11

<1.00e-11

<1.00e-11 Zr-95 Ci <1.00e-1 1 <1.00e-1 1 <1.00e-1 1 <1.00e-1 1 Mo-99 Ci <1.00e-11

<1.00e-11

<1.00e-11

<1.00e-11 Ru-103 Ci <1.00e-11

<1.00e-l1

<1.00e-11

<1.00e-l1 Sn-117m Ci <1.00e-11

<1.00e-11

<1.00e-11

<1.00e-11 Cs-134 Ci <1.00e-l1

<1.00e-11

<1.00e-11 1.44E-07 Cs- 137 Ci <1.00e-1 1 8.74E-06 <1.00e-1 1 2.32E-07 Ba\La- 140 Ci 5.25E-04 6.03E-04 1.03E-03 6.19E-04 Ce- 141 Ci <1.00e-11

<1.00e-l1

<1.00e-li

<1.00e-11 Ce-144 Ci <1.00e-11

<1.00e-11

<1.00e-11

<1.00e-11 TOTAL PARTICULATES Ci 1.55E-03 1.22E-03 1.82E-03 1.25E-03 4. Tritium Releases 1. Total Release Activity Ci 2.01 E+01 1.76E+01 2.02E+01 2.86E+01-1

"<" Indicates activity of sample is less than LLD given in uCi/ml LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)LIQUID RELEASES UNIT I and UNIT 2 SUMMATION OF ALL LIQUID RELEASES Estimated I 4th Qtr Total Error %I Units I 1stQtr I 2ndQtr i 3rdQtr 1 A. Fission and Activation Products 1. 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 %* *B. Tritium 1. Total Activity Released Ci <LLD <LLD <LLD N/A 2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD 3. Percent of Applicable Limit % EZl j C. Dissolved Noble Gases 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 %D. Gross Alpha 1. Total Activity Released (estimate)

Ci <LLD <LLD <LLD <LLD N/A 2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD 3. Percent of Applicable Limit % *[E. Volume of Liquid Waste to Dischargef liters I0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 N/AI IF. Volume of Dilution Water I liters I 0.OOE+00 0.OOE+00 0.OOE+00 0.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/ml LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)LIQUID RELEASES UNIT 1 and UNIT 2 BATCH MODE Nuclides From Batch Releases Units I 1st Qtr 2nd Qtr 3rd Qtr 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 Afy- I Oin 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_ 1 87 Ci <LLD <LLD <LLD <LLD TOTAL Ci None None None 1 None Xe- 131 m Ci <LLD <LLD <LLD <LLD Xe- 133 Ci <LLD <LLD <LLD <LLD Xe- I 33m 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/ml LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)LIQUID RELEASES UNIT 1 and UNIT 2 CONTINUOUS MODE[Nuclides From Continuous Releases Units I I st Qtr 2nd Qtr 3rd Qtr 4th Qtr Gross Alpha Ci <l.00E-07

<l.00E-07

<1.00E-07

<l.00E-07 H-3 Ci <l.00E-05

<l.00E-05

<1.00E-05

<1.00E-05 Cr-51 Ci <5.OOE-07

<5.OOE-07

<5.00E-07

<5.00E-07 Mn-54 Ci <5.OOE-07

<5.00E-07

<5.OOE-07

<5.00E-07 Fe-55 Ci <1.00E-06

<1.00E-06

<l.00E-06

<l.00E-06 Co-58 Ci <5.00E-07

<5.OOE-07

<5.00E-07

<5.OOE-07 Fe-59 Ci <5.OOE-07

<5.00E-07

<5.OOE-07

<5.00E-07 Co-60 Ci <5.OOE-07

<5.OOE-07

<5.OOE-07

<5.00E-07 Zn-65 Ci <5.OOE-07

<5.00E-07

<5.OOE-07

<5.OOE-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

<5.00E-08 Nb-95 Ci <5.OOE-07

<5.OOE-07

<5.OOE-07

<5.OOE-07 Zr-95 Ci <5.OOE-07

<5.OOE-07

<5.00E-07

<5.OOE-07 Mo-99 Ci <5.OOE-07

<5.OOE-07

<5.OOE-07

<5.00E-07 Tc-99m Ci <5.00E-07

<5.OOE-07

<5.OOE-07

<5.00E-07 Ag-lli0m Ci <5.OOE-07

<5.OOE-07

<5.00E-07

<5.00E-07 Sb-122 Ci <5.OOE-07

<5.OOE-07

<5.OOE-07

<5.00E-07 Sb- 124 Ci <5.OOE-07

<5.OOE-07

<5.OOE-07

<5.OOE-07 1-131 Ci <I.00E-06

<1.00E-06

<1.00E-06

<1.00E-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

<5.00E-07 Ba\La-140 Ci <5.OOE-07

<5.OOE-07

<5.00E-07

<5.OOE-07 Ce- 141 Ci <5.OOE-07

<5.OOE-07

<5.OOE-07

<5.OOE-07 Ce-144 Ci <5.OOE-07

<5.OOE-07

<5.OOE-07

<5.OOE-07 W- 187 Ci <5.OOE-07

<5.OOE-07

<5.00E-07

<5.OOE-07 TOTAL Ci <LLD <LLD <LLD <LLD Xe-131m Ci <1.OOE-05

<I.00E-05

<l.00E-05

<1.00E-05 Xe-133 Ci <1.00E-05

<1.00E-05

<I.00E-05

<l.00E-05 Xe-133m Ci <1.00E-05

<1.00E-05

<l.00E-05

<I1.00E-05 Xe-135 Ci <I.OOE-05

<l.00E-05

<1.00E-05

<1.OOE-05 Xe-135m Ci <1.OOE-05

<1.00E-05

<1.00E-05

<1.00E-05 TOTAL Ci <LLD <LLD <LLD <LLD"<" Indicates activity of sample is less than LLD given in uCi/ml EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)SOLID WASTE AND IRRADIATED FUEL SHIPMENTS EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)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.b. Total activity Ci 0.OOE+00 0.00E+00 N/A c. Major nuclides (estimate

%)d. Shipment type 2. Dry compressible waste, contaminated equipment, etc.a. Quantity shipped cu.m.N/A 5 .80E+02 2.19E-01 b. Total activity Ci c. Major nuclides (estimate

%)Co-60 Mn-54 Fe-55 Ni-63 Zn-65 4.92E+01 2.47E+O I 1.81E+01 1.96E+00 1.19E+00 d. Shipment type LSA 3. Other -(Metal)a. Quantity shipped cu.m.7.25E+O I 3.14E-03 b. Total activity Ci d. Major nuclides (estimate

%)Co-60 Mn-54 Fe-55 Ni-63 Zn-65 4.56E+01 2.30E+01 1.68E+0I 1.8 1E+00 1.11 E+00 d. Shipment type LSA EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FIRST QUARTER 4. Irradiated Components a.b.C.Number of shipments Mode of Transportation Destination 0 N/A N/A 5. Solid Waste Disposition 6.Number of Shipments Transportation Mode 8 Truck 2 Truck 10 Destination ALARON Corporation Duratek -Gallaher Rd., TN TOTAL THIS QUARTER 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+0 I Estimated total error % for irradiated components (Jan-Dec)

N/A B. IRRADIATED FUEL SHIPMENTS None EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)SOLID WASTE AND IRRADIATED FUEL SHIPMENTS SECOND QUARTER A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL I. Spent resins, filter sludges, evaporator bottoms, etc.a. Quantity shipped cu.m.1.88E+01 2.42E+02 b. Total activity Ci c. Major nuclides (estimate

%)Co-60 Fe-55 Zn-65 Mn-54 Ni-63 5.44E+O1 2.48E+01 1.38E+01 3.4 1E+00 2.07E+00 d. Shipment type e. Solidification agent LSA, Type A None 2. Dry compressible waste, contaminated equipment, etc.a. Quantity shipped cu.m.b. Total activity Ci c. Major nuclides (estimate

%)1 .09E+02 3.52E-02 Co-60 Mn-54 Fe-55 Ni-63 Zn-65 4.91E+01 2.47E+0 1 1.81E+01 1.96E+00 1.19E+00 d. Shipment type LSA EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)SOLID WASTE AND IRRADIATED FUEL SHIPMENTS SECOND QUARTER 3. Other a.b.C.d.Quantity shipped cu.m.Total activity Ci Major nuclides (estimate

%)Shipment type 0.00E+00 0.00E+00 N/A N/A 0 N/A N/A 4. Irradiated Components

a. Number of shipments b. Mode of Transportation
c. Destination
5. Solid Waste Disposition Number of Shipments Transportation Mode 2 Truck 2 Truck 2 Truck 1 Truck Destination ALARON Corporation Barnwell Waste Management Facility Duratek-Bear Creek EnergySolutions, LLC.(Containerized)

TOTAL THIS QUARTER 7 Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Jan-Dec) 2.50E+O 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 (2006)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. 1.55E+01 b. Total activity Ci 7.5 1E+01 c. Major nuclides (estimate

%)Fe-55 6.11E+0I Co-60 1.60E+01 Mn-54 1.32E+01 Cr-51 3.44E+00 Fe-59 2.73E+00 d. Shipment type LSA, Type B e. Solidification agent N/A 2. Dry compressible waste, contaminated equipment, etc.a. Quantity shipped cu.m. 1.8 IE+02 b. Total activity Ci 3.42E-02 c. Major nuclides (estimate

%)Co-60 5.32E+01 Mn-54 2.21E+01 Fe-55 1.89E+01 Ni-63 2.20E+00 Zn-65 1.00E+00 d.Shipment type LSA EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)SOLID WASTE AND IRRADIATED FUEL SHIPMENTS THIRD QUARTER 3. Other -(Combined Packages)a. Quantity shipped cu.m. 3.78E+00 b. Total activity Ci 3.94E+02 c. Major nuclides (estimate

%)Co-60 4.27E+01 Fe-55 4.08E+01 Mn-54 1.08E+01 Ni-63 2.43E+00 Fe-59 1.17E+00 d. Shipment type LSA 4. Irradiated Components

a. Number of shipments b. Mode of Transportation
c. Destination
5. Solid Waste Disposition Number of Shipments 4 1 1 5 0 N/A N/A Transportation Mode Truck Truck Truck Truck Destination ALARON Corporation Barnwell Waste Management Facility Duratek-Gallaher Rd, TN Duratek -Bear Creek TOTAL THIS QUARTER 11 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 (2006)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. 0.00E+00 b. Total activity Ci 0.OOE+00 c. Major nuclides (estimate

%) N/A d. Shipment type N/A e. Solidification agent None 2. Dry compressible waste, contaminated equipment, etc.a. Quantity shipped cu.m. 3.32E+02 b. Total activity Ci 1.32E+00 c. Major nuclides (estimate

%)Co-60 4.94E+O1 Mn-54 2.49E+01 Fe-55 1.82E+01 Ni-63 1.97E+00 Fe-59 1.24E+00 d. Shipment type LSA 3. Other -(Oil Waste)a. Quantity shipped cu.m. 7.25E+01 b. Total activity Ci 3.24E-03 c. Major nuclides (estimate

%)Co-60 4.93E+01 Mn-54 2.50E+01 Fe-55 1.82E+01 Ni-63 1.96E+00 Fe-59 1.29E+00 d. Shipment type LSA EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FOURTH QUARTER 3. Other -(Sealed Sources)a. Quantity shipped cu.m. 2.12E-01 b. Total activity Ci 8.54E-01 c. Major nuclides (estimate

%)Co-60 4.93E+01 Mn-54 2.50E+01 Fe-55 1.82E+01 Ni-63 1.96E+00 Fe-59 1.27E+00 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 4 Truck ALARON Corporation 6 Truck Duratek-Bear Creek, TN TOTAL THIS QUARTER 10 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+0 1 Estimated total error % for other irradiated components (Jan-Dec)

N/A B. IRRADIATED FUEL SHIPMENTS None EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2005)RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RESULTING FROM RELEASES AND COMPLIANCE STATUS

  • DELIVER TO HEALTH PHYSICS *AIRBORNE Effluents-10CFR50 Listing 09-apr-2007 14:20:36 STATION: UNIT: PERIOD: NAME: REPORT: MODE: LASALLE STATION 1 Ol/Ol/O6 12/31/06 ODCMLAS ANNUAL ACTUAL LASALLE STATION UNIT ONE ACTUAL 2006 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/09/07 INFANT RECEPTOR TYPE GAMMA AIR (MRAD)BETA AIR (MRAD)TOT. BODY (MREM)SKIN (MREM)ORGAN (MREM)1ST QUARTER JAN-MAR 2.63E-02 (WSW)9.56E-04 (ESE)1.99E-02 (WSW)2. 10E-02 (WSW)2. 07E-03 (ESE)2ND QUARTER APR-JUN 1.48E-02 (WSW)4.56E-04 (ESE)1.12E-02 (WSW)1.17E-02 (WSW)1.35E-02 (ESE)3RD QUARTER JUL-SEP 1.31E-02 (WSW)4.OOE-04 (ESE)9.90E-03 (WSW)1.04E-02 (WSW)2.16E-02 (ESE)4TH QUARTER OCT-DEC 7.42E-03 (WSW)2.22E-04 (ESE)5.61E-03 (WSW)5.88E-03 (WSW)8.77E-03 (ESE)THYROID 6. 16E-02 (WSW)2.03E-03 (ESE)4.66E-02 (WSW)4. 90E-02 (WSW)4 .59E-02 (ESE)THYROID ANNUAL THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS -10CFR 50 APP. I INFANT RECEPTOR------------------

o% OF APP I.GAMMA AIR (MRAD)BETA AIR (MRAD)TOT. BODY (MREM)SKIN (MREM)ORGAN (MREM)QTRLY OBJ 5.0 10.0 2.5 7.5 7.5 1ST QTR JAN-MAR 0.53 0.01 0.80 0.28 0.03 THYROID 2ND QTR APR-JUN 0.30 0.00 0.45 0.16 0.18 3RD QTR JUL-SEP 0.26 0.00 0.40 0.14 0.29 4TH QTR OCT-DEC 0.15 0.00 0.22 0.08 0.12 THYROID YRLY OBJ 10.0 20.0 5.0 15.0 15.0% OF APP. I 0 .62 0.01 0. 93 0.33 0.31 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 2006 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/09/07 CHILD RECEPTOR TYPE GAMMA AIR (MRAD)BETA AIR (MRAD)TOT. BODY (MREM)SKIN (MREM)ORGAN (MREM)1ST QUARTER JAN-MAR 2.63E-02 (WSW)9.56E-04 (ESE)1.99E-02 (WSW)2.10E-02 (WSW)1.72E-03 (NNE)2ND QUARTER APR-JUN 1.48E-02 (WSW)4.56E-04 (ESE)1.12E-02 (WSW)1.17E-02 (WSW)1.82E-02 (NNE)3RD QUARTER JUL-SEP 1.31E-02 (WSW)4.OOE-04 (ESE)9.90E-03 (WSW)1.04E-02 (WSW)2.90E-02 (NNE)4TH QUARTER OCT-DEC 7.42E-03 (WSW)2.22E-04 (ESE)5.61E-03 (WSW)5.88E-03 (WSW)1.13E-02 (NNE)THYROID ANNUAL 6. 16E-02 (WSW)2.03E-03 (ESE)4. 66E-02 (WSW)4.90E-02 (WSW)6. 03E-02 (NNE)THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS -10CFR 50 APP. I CHILD RECEPTOR-------------------

O% OF APP I.GAMMA AIR (MRAD)BETA AIR (MRAD)TOT. BODY (MREM)SKIN (MREM)ORGAN (MREM)QTRLY OBJ 5.0 10.0 2.5 7.5 7.5 1ST QTR JAN-MAR 0.53 0.01 0.80 0.28 0.02 2ND QTR APR-JUN 0.30 0.00 0.45 0.16 0.24 3RD QTR JUL-SEP 0.26 0.00 0.40 0.14 0.39 4TH QTR OCT-DEC 0.15 0.00 0.22 0.08 0.15 YRLY OBJ 10.0 20.0 5.0 15.0 15.0% OF APP. I 0 .62 0.01 0. 93 0.33 0.40 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 2006 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/09/07 TEENAGER RECEPTOR TYPE GAMMA AIR (MRAD)BETA AIR (MRAD)TOT. BODY (MREM)SKIN (MREM)-ORGAN (MREM)1ST QUARTER JAN-MAR 2.63E-02 (WSW)9.56E-04 (ESE)1.99E-02 (WSW)2.10E-02 (WSW)1.27E-03 (NNE)2ND QUARTER APR-JUN 1.48E-02 (WSW)4.56E-04 (ESE)1.12E-02 (WSW)1.17E-02 (WSW)1.14E-02 (NNE)3RD QUARTER JUL-SEP 1.31E-02 (WSW)4.OOE-04 (ESE)9.90E-03 (WSW)1.04E-02 (WSW)1.80E-02 (NNE)4TH QUARTER OCT-DEC 7.42E-03 (WSW)2.22E-04 (ESE)5.61E-03 (WSW)5.88E-03 (WSW)7.21E-03 (NNE)THYROID ANNUAL 6.16E-02 (WSW)2. 03E-03 (ESE)4. 66E-02 (WSW)4. 90E-02 (WSW)3.80E-02 (NNE)THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS -10CFR 50 APP. I TEENAGER RECEPTOR------------------

%% OF APP I.GAMMA AIR (MRAD)BETA AIR (MRAD)TOT. BODY (MREM)SKIN (MREM)ORGAN (MREM)QTRLY OBJ 5.0 10.0 2.5 7.5 7.5 1ST QTR JAN-MAR 0.53 0.01 0.80 0.28 0.02 THYROID 2ND QTR APR-JUN 0.30 0.00 0.45 0.16 0.15 3RD QTR JUL-SEP 0.26 0.00 0.40 0.14 0.24 4TH QTR OCT-DEC 0.15 0.00 0.22 0.08 0.10 THYROID YRLY OBJ 10.0 20.0 5.0 15.0 15.0% OF APP. I 0 .62 0.01 0 .93 0.33 0.25 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 2006 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/09/07 ADULT RECEPTOR TYPE GAMMA AIR (MRAD)BETA AIR (MRAD)TOT. BODY (MREM)SKIN (MREM)ORGAN (MREM)1ST QUARTER JAN-MAR 2.63E-02 (WSW)9.56E-04 (ESE)1.99E-02 (WSW)2. 10E-02 (WSW)1.40E-03 (NNE)2ND QUARTER APR-JUN 1.48E-02 (WSW)4.56E-04 (ESE)1.12E-02 (WSW)1.17E-02 (WSW)1.14E-02 (NNE)3RD QUARTER JUL-SEP 1.31E-02 (WSW)4.00E-04 (ESE)9.90E-03 (WSW)1.04E-02 (WSW)1.81E-02 (NNE)4TH QUARTER OCT-DEC 7.42E-03 (WSW)2.22E-04 (ESE)5.61E-03 (WSW)5.88E-03 (WSW)7.32E-03 (NNE)THYROID ANNUAL 6. 16E-02 (WSW)2. 03E-03 (ESE)4 .66E-02 (WSW)4.90E-02 (WSW)3.82E-02 (NNE)THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS -10CFR 50 APP. I ADULT RECEPTOR------------------

o% OF APP I.GAMMA AIR (MRAD)BETA AIR (MRAD)TOT. BODY (MREM)SKIN (MREM)ORGAN (MREM)QTRLY OBJ 5.0 10.0 2.5 7.5 7.5 1ST QTR JAN-MAR 0.53 0.01 0.80 0.28 0.02 2ND QTR APR-JUN 0.30 0.00 0.45 0.16 0.15 3RD QTR JUL-SEP 0.26 0.00 0.40 0.14 0.24 4TH QTR OCT-DEC 0.15 0.00 0.22 0.08 0.10 YRLY OBJ 10.0 20.0 5.0 15.0 15.0% OF APP. I 0 .62 0.01 0 .93 0.33 0.25 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 HEALTH PHYSICS *AQUATIC Effluents-10CFR50 Listing 13-apr-2007 07:35:20 STATION: UNIT: PERIOD: NAME: REPORT: MODE: LASALLE STATION 1 01/01/06 12/31/06 ODCMLAS ANNUAL ACTUAL LASALLE STATION UNIT ONE ACTUAL 2006 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/13/07 INFANT RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 0.00E+00 0.OOE+00 2ND QUARTER APR-JUN 0.00E+00 0.OOE+00 3RD QUARTER JUL-SEP 0.00E+00 0.00E+00 4TH QUARTER OCT-DEC 0.OOE+00 0.OOE+00 ANNUAL 0 .OOE+00 0. 00E+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS -10 CFR 50 APP. I-------------

9% OF APP I.QTRLY 1ST QTR OBJ JAN-MAR 2ND QTR 3RD QTR APR-JUN JUL-SEP 4TH QTR YRLY % OF OCT-DEC OBJ APP. I TOTAL BODY (MREM) 1.5 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 10.0 0.00 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 2006 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM *PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/13/07 INFANT RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 0.00E+00 0.OOE+00 2ND QUARTER APR-JUN 0.00EE+00 0.OOE+00 3RD QUARTER JUL-SEP 0.OOE+00 0.OOE+00 4TH QUARTER OCT-DEC 0.OOE+00 0.OOE+00 ANNUAL 0. OOE+00 0. OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS -40 CFR 141 TYPE ANNUAL LIMIT% OF LIMIT TOTAL BODY INTERNAL ORGAN 4.0 MREM 4.0 MREM 0.000 0.000* 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 2006 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/13/07 CHILD RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN -MAR 0.OOE+00 0.OOE+00 2ND QUARTER APR-JUN 0.OOE+00 0.OOE+00 3RD QUARTER JUL-SEP 0.00E+00 0.OOE+00 4TH QUARTER OCT-DEC 0.OOE+00 0.OOE+00 ANNUAL 0. OOE+00 0. OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS -10 CFR 50 APP. I----------------

O% OF APP I.QTRLY 1ST QTR OBJ JAN-MAR 2ND QTR APR-JUN 3RD QTR JUL-SEP 4TH QTR OCT-DEC YRLY % OF OBJ APP. I TOTAL BODY (MREM) 1.5 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 10.0 0.00 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 2006 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM *PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/13/07 CHILD RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 0.OOE+00 0.OOE+00 2ND QUARTER APR-JUN 0.OOE+00 0.00E+00 3RD QUARTER JUL-SEP 0.OOE+00 0.OOE+00 4TH QUARTER OCT-DEC 0.OOE+00 0.OOE+00 ANNUAL 0. OOE+00 0. 00E+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS -40 CFR 141 TYPE ANNUAL LIMIT% OF LIMIT TOTAL BODY INTERNAL ORGAN 4.0 MREM 4.0 MREM 0.000 0.000* 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 2006 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/13/07 TEENAGER RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN -MAR 0.00E+00 0.OOE+00 2ND QUARTER APR-JUN 0.OOE+00 0.OOE+00 3RD QUARTER JUL-SEP 0.00E+00 0.00E+00 4TH QUARTER OCT-DEC 0.OOE+00 0.OOE+00 ANNUAL 0 .OOE+00 0. OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS -10 CFR 50 APP. I-------------

% OF APP I.QTRLY 1ST QTR OBJ JAN-MAR 2ND QTR APR-JUN 3RD QTR JUL-SEP 4TH QTR OCT-DEC YRLY % OF OBJ APP. I TOTAL BODY (MREM) 1.5 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 10.0 0.00 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 2006 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM *PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/13/07 TEENAGER RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN- MAR 0.OOE+00 0.00E+00 2ND QUARTER APR-JUN 0 .00E+00 0.00E+00 3RD QUARTER JUL-SEP 0.00E+00 0.00E+00 4TH QUARTER OCT-DEC 0.OOE+00 0.OOE+00 ANNUAL 0 .OOE+00 0. 00E+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE ,STATUS -40 CFR 141 TYPE ANNUAL LIMIT% OF LIMIT TOTAL BODY INTERNAL ORGAN 4.0 MREM 4.0 MREM 0.000 0.000* 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 2006 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/13/07 ADULT RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN -MAR 0.OOE+00 0.OOE+00 2ND QUARTER APR-JUN 0.OOE+00 0.00E+00 3RD QUARTER JUL-SEP 0.00E+00 0.OOE+00 4TH QUARTER OCT-DEC 0.OOE+00 0.OOE+00 ANNUAL 0. 00E+00 0. OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS -10 CFR 50 APP. I-------------

% OF APP I.QTRLY 1ST QTR OBJ JAN-MAR 2ND QTR APR-JUN 3RD QTR JUL-SEP 4TH QTR OCT-DEC YRLY % OF OBJ APP. I TOTAL BODY (MREM) 1.5 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 10.0 0.00 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 2006 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM *PERIOD OF RELEASE -01/01/06 TO 12/31/06 CALCULATED 04/13/07 ADULT RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 0.OOE+00 0.OOE+00 2ND QUARTER APR-JUN 0.00E+00 0.OOE+00 3RD QUARTER JUL-SEP 0.OOE+00 0.OOE+00 4TH QUARTER OCT-DEC 0. OOE+00 0.OOE+00 ANNUAL 0. OOE+00 0. OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS -40 CFR 141 TYPE ANNUAL LIMIT% OF LIMIT TOTAL BODY INTERNAL ORGAN 4.0 MREM 4.0 MREM 0.000 0.000* 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 HEALTH PHYSICS ***** * * * ** * *************
  • 09-apr-2007 14:20:43 Total Effective Dose Equivalent

-10CFR20 Listing STATION: LASALLE STATION UNIT: 1 PERIOD: 01/01/06 12/31/06 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 01/01/06 to 12/31/06 Aquatic Effluents are complete from 01/01/06 to 12/31/06 Skyshine entries are complete from 01/01/06 to 12/31/06 LASALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/06 TO 12/31/06 CALCULATED 04/09/07 1. 10 CFR 20.1301 (a)(i) Compliance Total Effective Dose Eqivalent, mrem/yr 3.50E-01 10 CFR 20.1301 (a)(1) limit mrem/yr 100.0% of limit 0.35 Compliance Summary -10CFR20 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr% of Limit 0.35 TEDE 8.17E-02 1.01E-01 1.01E-01 6.70E-02 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 01/01/06 TO 12/31/06 CALCULATED 04/09/07 2. 10 CFR 20.1301 (d)/40 CFR 190 Compliance Dose (mrem)Limit (mrem)% of Limit Whole Body (DDE)Plume 4.66E-02 Skyshine 2.94E-01 Ground 3.81E-04 Total 3.41E-01 Organ Dose (CDE)Thyroid Gonads Breast Lung Marrow Bone Remainder 3. 12E-02 9. 01E-03 9. OOE-03 9. 01E-03 9 01E-03 9 OOE-03 9 03E-03 9.68E-03 3.50E-01 25.0 75.0 25.0 25.0 25.0 25.0 25.0 25.0 1.36 0.04 0 .04 0 .04 0 .04 0 .04 0 .04 0 .04 CEDE TEDE 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

  • DELIVER TO HEALTH PHYSICS *09-apr-2007 14:22:23 Total Effective Dose Equivalent

-10CFR20 Listing STATION: LASALLE STATION UNIT: 2 PERIOD: 01/01/06 12/31/06 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 01/01/06 to 12/31/06 LASALLE STATION UNIT TWO 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/06 TO 12/31/06 CALCULATED 04/09/07 1. 10 CFR 20.1301 (a) (1) Compliance Total Effective Dose Eqivalent, mrem/yr 3.25E-01 10 CFR 20.1301 (a) (1) limit mrem/yr 100.0% of limit 0.32 Compliance Summary -10CFR20 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr% of Limit 0.32 TEDE 8.80E-02 8.86E-02 8.85E-02 5.98E-02 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 01/01/06 TO 12/31/06 CALCULATED 04/09/07 2. 10 CFR 20.1301 (d)/40 CFR 190 Compliance Dose (mrem)Limit (mrem)% of Limit Whole Body (DDE)Organ Dose (CDE)Plume Skyshine Ground Total Thyroid Gonads Breast Lung Marrow Bone Remainder 0. OOE+00 3 .25E-01 0. OOE+00 3.25E-01 0 OOE+00 0 OOE+00 0 OOE+00 0 OOE+00 0 OOE+00 0. OOE+00 0 OOE+00 0. OOE+00 3.25E-01 25.0 75.0 25.0 25.0 25.0 25.0 25.0 25.0 1.30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 CEDE TEDE 100.0 0.32 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 (2006)METEOROLOGICAL DATA LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Extremely Unstable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind .Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24> 24 Total Total 0 1 14 23 14 3 55 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: January -March 2006 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 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW -0 NW 0 NNW 0 variable 0----- ----- -----9 5 0 1 1 0 2 1 6 0 2 0 2 5 4 11 0 7 2 1 1 0 0 0 2 0 3 2 2 2 16 7 6 0 0 0 0 0 0 0 2 4 2 2 1 3 4 4 1 3 0----- -----17 8 1 2 1 0 4 11 9 5 11 7 10 28 14 21 0 Total 0 15 49 51 26 8 149 Hours of calm in this stability class: Hours of missing wind measurements in ti Hours of missing stability measurements

'I 0 is stability class: 0 in all stability classes: 0 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Slightly Unstable Winds Measured at-200Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)Wind Direction 1-3 N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 4-7 4 4 0 0 0 0 1 2 0 1 1 1 2 3 3 1 0 18 11 3 2 1 1 5 4 3 4 1 5 9 9 7 6 0 4 5 7 2 3 5 2 6 6 1 2 3 12 13 13 15 0 26 20 11 5 4 7 8 18 10 7 5 12 29 32 24 28 0 8-12 13-18 19-24 > 24 Total Total 0 23 89 99 29 6 246 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Neutral Winds Measured at-200Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 14 26 12 11 3 3 2 3 3 1 4 4 7 14 7 9 0----- -----39 23 6 9 15 11 10 7 8 5 9 12 16 46 29 43 0 288 10 3 18 27 17 24 9 12 6 9 11 12 14 51 29 52 0 304 0 0 5 23 5 2 1 5 5 8 8 5 4 26 11 20 0----- -----63 52 43 76 40 41 22 27 22 23 36 38 47 147 76 125 0 Total 9 123 128 26 878 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 bility classes: Hours of missing stability measurements in all sta 0 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Slightly Stable Winds Measured at Wind Speed-200Ft-33Ft Delta-T (F)33 Feet (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 21 10 15 2 5 1 1 7 12 18 8 11 10 24 6 10 5 19 2 6 2 12 3 12 7 7 12 19 18 20 11 5 0 0 1 0 1 4 5 5 5 4 30 26 14 2 1 2 1 0 0 0 0 0 0 0 0 0 5 3 10 3 1 4 8 0 0 0 33 19 10 15 40 24 43 26 61 44 32 18 26 59 42 16 0 Total 31 138 183 101 34 21 0 stability class: 0 all stability classes: 508 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Moderately Stable Winds Measured at-200Ft-33Ft Delta-T (F)33 Feet Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Wind Speed (in mph)4-7 8-12 13-18 1-3 0 0 0 0 4 1 0 1 0 0 0 0 1 0 0 2 0 19-24 > 24 Total 11 1 0 0 6 6 5 2 5 2 5 6 4 18 7 1 0 0 0 0 0 6 5 2 6 3 7 13 24 11 9 15 0 0 11 1 0 0 16 12 7 10 11 17 23 32 17 28 22 3 0 Total 9 79 101 19 2 0 210 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Extremely Stable Winds Measured at-200Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE 1-3 0 0 0 0 2 1 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 4 1 1 3 5 SE SSE S SSW SW WSW W 0 16 0 5 0 5 0 1 1 2 0 0 0 0 0 0 0 0 0 1 0 3 1 0 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 20 0 0 0 0 2 1 0 0 0 0 6 6 5 8 WNW NW NNW Variable Total 0 0 1 0 1 0 0 11 6 9 0 0 0 1 0 8 3 0 0 0 0 13 0 14 0 0 0 0 1 0 6 44 29 0 84 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 0 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Extremely Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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: 6 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Moderately Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 1 0 0 0----- ----- -----0 0 3 0 5 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: 6 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Slightly Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total Total 0 0 6 9 17 9 41 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: 6 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Neutral -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 0 0 0 1 0 0 0 0 0 0 0 1 0 0 1 1 0 4-7 8-12 13-18 19-24 > 24 Total 22 31 10 10 8 2 5 6 12 3 5 6 15 21 22 22 0 49 33 9 8 6 8 10 4 6 2 10 13 20 46 55 45 0 324 22 14 24 26 16 5 6 16 17 12 11 12 14 39 59 39 0 332 6 0 13 23 3 6 11 21 14 16 15 13 24 47 43 24 0 104 84 62 75 34 22 36 50 53 33 50 46 81 155 185 135 0 Total 4 66 200 279 1205 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 33 all stability classes: 6 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Slightly Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 7 7 20 4 7 0 4 4 1 1 0 2 2 3 9 5 0 15 12 6 5 16 7 7 11 6 6 2 8 10 7 11 11 0 3 4 1 3 12 6 9 16 7 9 4 9 7 15 21 12 0 138 0 1 0 1 6 14 15 21 24 77 22 7 15 34 4 0 0 241 30 26 34 16 46 32 36 55 45 96 33 26 36 61 47 33 0 652 Total 8 49 76 140 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 2 bility classes: Hours of missing stability measurements in all sta 6 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Moderately Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE 1-3 0 1 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total SSE S SSW SW WSW W 1 1 0 0 0 1 0 1 0 0 0 0 1 1 1 0 1 0 1 3 0 1 0 5 1 1 0 0 1 2 3 2 5 2 1 1 0 2 3 0 4 1 1 0 0 4 2 5 2 1 3 2 0 0 0 0 0 6 0 0 0 1 12 3 8 6 1 17 3 3 12 6 6 18 5 10 21 0 0 0 0 9 4 2 0 4 1 15 WNW NW NNW Variable Total 0 0 0 0 4 4 3 5 0 7 8 6 0 3 10 9 28 1 15 1 14 0 15 0 0 10 29 38 66 38 185 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: 6 LaSalle Nuclear Station Period of Record: January -March 2006 Stability Class -Extremely Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Wind Speed (in mph)4-7 8-12 13-18 1-3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19-24 > 24 Total Total 0 4 2 5 9 10 30 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: 6 LaSalle Nuclear Station Period of Record: April -June 2006 Stability Class -Extremely Unstable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total--------- --0 0 0 0 0 3 4 7 4 0 0 0 0 0 0 0 0 0 0 0 3 8 4 0 0 0 0 0 0 0 8 7 1 0 Total 0 5 4 25 15 0 49 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 LaSalle Nuclear Station Period of Record: April -June 2006 Stability Class -Moderately Unstable -200Ft-33Ft Delta-T (F)winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 2 9 1 0 0 12 0 0 0 1 4 1 0 1 5 2 0 0 1 0 0 0 3 2 0 0 0 1 0 1 3 2 0 1 8 1 0 4 9 1 0 3 3 1 0 1 0 4 0 4 1 2 1 12 11 3 1 10 5 2 0 5 5 0 0 0 0 0 4 64 59 22----- -----12 12 6 9 1 5 1 6 10 14 7 5 7 28 18 10 0 Total 0 2 151 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabi lity class: 0 tability classes: Hours of missing stability measurements in all S 0 LaSalle Nuclear Station Period of Record: April -June 2006 Stability Class -Slightly Ur Winds Measu: win nstable red at-200Ft-33Ft Delta-T (F)33 Feet Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 4-7 7 5 0 1 0 0 0 0 0 0 0 2 6 2 5 8 0 d Speed (in mph)8-12 13-18 6 1 11 2 6 4 4 7 4 1 0 3 0 2 0 3 2 5 11 8 5 4 3 1 11 4 22 11 8 4 4 0 0 0 19-24 > 24 Total 0 1 1 1 0 2 0 3 3 0 1 0 2 10 3 1 0 0 0 0 0 1 1 1 3 1 0 0 0 0 1 0 0 0 14 19 11 13 6 6 3 9 11 20 10 6 23 46 20 13 0 Total 1 36 97 60 28 8 230 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: April -June 2006 Stability Class -Neutral Winds Measured at-200Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)8-12 13-18 19-24 > 24 Total Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 27 7 29 27 26 43 16 12 10 19 7 5 6 9 11 14 15 15 14 16 7 9 8 10 8 11 4 19 9 20 25 18 0 0----- ----- ----- -----1 5 30 17 6 20 8 10 16 13 9 13 7 11 17 18 0 201 0 3 6 1 6 11 7 3 2 2 2 1 4 25 6 10 0 40 67 107 47 41 52 38 42 51 45 27 33 30 65 54 74 0 Total 16 222 254 89 31 813 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 2006 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 Total-------------------

------ -------- ------ ------- -------------

N 2 27 2 0 0 0 31 NNE 2 21 6 0 1 0 30 NE 0 7 7 3 0 0 17 ENE 1 10 13 8 0 0 32 E 1 13 25 10 4 0 53 ESE 0 8 5 11 8 0 32 SE 0 5 5 5 1 0 16 SSE 2 1 8 9 0 0 20 S 0 8 9 9 4 2 32 SSW 2 8 13 13 5 0 41 SW 1 8 12 6 1 0 28 WSW 1 5 9 2 1 0 18 W 1 5 13 0 2 0 21 WNW 1 10 8 2 0 0 21 NW 2 17 20 3 0 0 42 NNW 0 13 10 0 0 0 23 Variable 0 0 0 0 0 0 0 Total 16 166 165 81 27 2 457 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: U LaSalle Nuclear Station Period of Record: April -June 2006 Stability Class -Moderately Stable-200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet wind Speed (in mph)4-7 8-12 13-18 19-24 > 24 Total Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1 -3 0 0 1 0 1 0 3 2 2 1 0 2 1 0 0 0 17 2 6 0 0 0 1 0 15 11 12 10 10 4 9 9 8 22 9 10 5 5 15 11 7 6 14 7 18 9 6 1 0 0 19 6 0 2 30 23 14 21 36 22 14 28 15 22 27 7 0 Total 13 152 107 12 2 0 286 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: April -June 2006 Stability Class -Extremely Stable-200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 1 0 0 0 0 1 1 1 0 0 0 0 0 1 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 5 1 0 23 1 0 16 20 0 6 19 1 7 2 0 5 19 0 5 10 0 15 14 0 9 2 0-2 0 0 3 0 0 0 0 0 1 0 0 0 2 7 25 37 26 9 24 15 29 12 2 3 0 Total 5 98 88 1 0 0 192 0 Hours of calm in this stability class: 0 Hours of missinq wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: April -June 2006 Stability Class -Extremely Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missinq wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 LaSalle Nuclear Station Period of Record: April -June 2006 Stability Class -Moderately Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24> 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 7 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 3 LaSalle Nuclear Station Period of Record: April -June 2006 Stability.

Class -Slightly Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 6 5 3 0 2 0 1 3 10 2 2 0 3 3 3 0 Total 0 1 5 15 21 5 47 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 3 LaSalle Nuclear Station Period of Record: April -June 2006 Stability Class -Neutral -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 1 0 1 0 0 0 0 0 0 1 0 0 1 1 2 1 0 4-7 8-12 13-18 19-24 > 24 Total 16 25 19 13 6 5 6 8 11 8 3 4 4 0 6 12 0 19 30 24 11 4 2 7 8 18 13 6 11 13 23 30 19 0 238 21 22 47 26 21 11 1 5 5 25 15 12 20 37 35 23 0 326 6 8 42 19 3 14 8 25 30 18 21 10 6 28 20 10 0 268 0 9 16 7 4 32 19 10 10 6 0 4 9 34 27 7 0 63 94 149 76 38 64 41 56 74 71 45 41 53 123 120 72 0 Total 8 146 194 1180 1 isses: 3 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability cli LaSalle Nuclear Station Period of Record: April -June 2006 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 1 7 12 2 1 23 NNE 0 4 14 11 1 1 31 NE 1 7 12 17 1 0 38 ENE 0 7 17 18 2 2 46 E 0 5 13 13 6 12 49 ESE 0 5 5 9 2 19 40 SE 0 3 9 2 2 8 24 SSE 1 2 4 2 4 6 19 S 0 0 4 6 5 13 28 SSW 0 1 1 6 10 30 48 SW 1 1 6 6 8 16 38 WSW 0 1 5 10 5 4 25 W 0 2 5 7 8 3 25 WNW 0 2 3 10 15 9 39 NW 0 3 10 17 15 5 50 NNW 0 2 4 13 10 1 30 Variable 0 0 0 0 0 0 0 Total 3 46 119 159 96 130 553 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: J LaSalle Nuclear Station Period of Record: April -June 2006 Stability Class -Moderately Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N 1-3 0 4-7 8-12 13-18 19-24 > 24 Total 1 3 NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 2 10 4 2 1 2 6 1 1 0 2 2 0 2 1 0 1 4 7 4 6 0 0 1 6 2 0 0 4 1 3 3 1 0 0 0 4 3 0 20 9 0 10 2 18 6 32 2 17 5 11 1 10 0 2 1 2 4 7 10 20 38 2 10 18 32 4 4 3 3 11 21 6 5 8 4 10 5 19 2 14 6 30 4 26 3 19 5 6 10 1 0 5 0 5 0 5 0 Variable 0 0 0 Total 1 28 54 79 71 79 312 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: 3 LaSalle Nuclear Station Period of Record: April -June 2006 Stability Class -Extremely Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24> 24 Total 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 0 0 7 0 0 0 0 0 2 0 1 1 0 1 0 0 1 0 0 1 0 0 0 3 0 1 0 0 0 0 0 0 0 0 0 0 1 3 10 11 5 2 0 4 0 0 0 0 1 0 0 0 0 9 14 15 16 9 4 1 7 3 1 0 Total 1 1 5 19 18 36 80 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: 3 LaSalle Nuclear Station Period of Record: July -September 2006 Stability Class -Extremely Unstable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 1 0 0 0 0 0 2 1 1 1 0 2 0 0 0 2 0 1 0 4 1 1 0 3 1 1 5 14 4 6 19 2 6 0 0 0 3 0 0 0 0 0 4 3 12 5 0 2 0 1 0 2 0 7 1 1 0 5 2 6 9 26 11 6 21 2 9 0 Total 0 10 68 30 0 0 108 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 LaSalle Nuclear Station Period of Record: July -September 2006 Stability Class -Moderately Unstable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 7 8 10 5 4 1 4 4 1 10 11 8 8 10 3 3 0 7 12 14 11 11 1 9 6 7 15 24 12 12 17 4 3 0 Total 1 32 97 32 3 0 165 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 LaSalle Nuclear Station Period of Record: July -Septemb Stability Class -Slightly Unstable -20 Winds Measured at 33 Feet Wind Speed (in mph er 2006 OFt-33Ft Delta-T (F)l)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4-7 14 4 4 1 5 1 7 8 5 6 3 9 10 5 4 2 0 8-12 13-18 19-24 > 24 Total 9 9 16 12 5 2 1 0 2 9 10 8 6 8 5 14 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 24 13 23 21 13 3 10 12 10 16 21 19 19 16 10 16 0 Total 1 88 116 39 2 0 246 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 bility classes: Hours of missing stability measurements in all sta 0 LaSalle Nuclear Station Period of Record: July -September 2006 Stability Class -Neutral -20 Winds Measured at 33 Feet Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 6 4 1 1 2 3 2 1 2 5 2 3 0 0 1 3 0 Wind Speed (in mph)4-7 8-12 13-18 37 18 0 29 13 0 11 40 5 12 33 30 12 28 3 15 6 0 19 15 5 14 14 10 18 13 7 13 20 2 11 19 10 16 11 2 17 12 12 17 11 13 11 2 1 22 18 2 0 0 0 19-24 > 24 Total 62 46 57 76 45 24 42 41 41 40 43 33 43 42 15 45 0 Total 36 274 273 102 10 0 695 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: July -Septembe Stability Class -Slightly Stable -200 Winds Measured at 33 Feet Wind Speed (in mph)r 2006 Ft-33Ft Delta-T (F)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 0 2 3 0 1 3 3 1 2 1 3 3 0 0 0 2 0 4-7 8-12 13-18 19-24 > 24 Total 15 15 4 5 31 23 8 11 10 19 10 12 5 18 7 10 0 0 2 4 8 17 4 7 12 14 35 28 16 10 9 4 3 0 173 15 19 11 14 49 31 27 25 26 55 50 31 15 28 11 15 0 Total 24 203 21 1 0 422 0" Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: July -Septemb Stability Class -Moderately Stable -20'Winds Measured at 33 Feet Wind Speed (in mph er 2006 0Ft-33Ft Delta-T (F))Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 8-12 13-18 1-3 0 1 0 2 0 1 3 0 0 1 1 0 3 3 4 2 0 4-7 19-24 > 24 Total 8 0 6 0 2 0 0 0 10 9 19 0 22 3 16 7 16 11 25 18 13 18 14 8 10 7 11 0 6 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8 7 2 2 19 20 28 23 27 44 32 22 20 14 10 6 0 Total 21 182 81 0 0 0 284 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: July -Stability Class -Extremely Stable Winds Measured at Wind Speed September 2006-200Ft-33Ft Delta-T (F)33 Feet (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 0 0 0 1 1 1 2 1 2 0 1 3 1 2 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 7 21 23 20 23 28 27 21 23 28 1 0 0 0 0 0 0 2 0 0 1 3 13 9 8 3 0 0 0 0 39 0 0 0 1 10 22 25 22 28 41 37 32 27 30 1 0 0 Total 15 222 0 0 0 276 Hours of calm in this stability class: 0 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 2006 Stability Class -Extremely Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 I Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 bility classes: Hours of missing stability measurements in all sta 0 LaSalle Nuclear Station Period of Record: July -September 2006 Stability Class -Moderately Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24> 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 4 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 2 6 0 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: July -September 2006 Stability Class -Slightly Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Wind Speed (in mph)4-7 8-12 13-18 0 2 2 0 0 0 0 0 5 0 0 2 0 0 0 1 0 0 1 0 1 0 0 0 0 0 1 0 1 0 0 5 10 0 3 7 0 0 0 1 2 2 0 2 1 0 1 1 0 -0 0 19-24 > 24 Total 0 0 2 0 0 0 0 0 4 2 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 0 7 2 0 1 2 0 5 3 19 10 0 5 3 2 0 Total 0 3 16 32 12 0 63 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station period of Record: July -September 2006 Stability Class -Neutral -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 2 3 0 0 2 2 0 2 5 2 1 0 0 1 0 1 0 4-7 8-12 13-18 19-24> 24 Total 11 40 5 24 10 22 5 25 5 24 6 4 13 15 12 28 7 24 10 18 13 23 16 16 13 22 8 24 5 15 10 16 0 0 29 15 44 52 18 5 9 11 9 16 27 15 20 24 21 15 0 330 1 5 33 35 6 1 6 8 12 8 25 5 10 20 6 2 0 183 84 52 110 118 55 18 47 65 61 54 97 55 67 79 47 44 0 Total 21 149 340 30 1053 Hours of calm in Hours of missing Hours of missing this stability class: 0 wind measurements in this stability class: 3 stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: July -September 2006 Stability Class -Slightly Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 0 1 0 1 4 1 1 0 0 0 1 0 0 0 0 0 0 4-7 8-12 13-18 5 10 12 2 11 8 3 17 10 6 6 16 3 15 18 3 6 5 1 9 5 1 17 7 6 11 9 4 6 10 3 4 20 6 13 8 4 4 9 2 5 7 3 3 11 4 9 1 0 0 0 19-24 > 24 Total 4 2 7 8 6 11 8 4 11 21 16 11 18 8 5 1 0 141 0 0 0 0 0 0 6 0 6 14 30 4 3 3 0 0 0 31 24 37 37 46 26 30 29 43 55 74 42 38 25 22 15 0 Total 9 56 146 156 66 574 0 Hours of calm in this stability class: 0 Hours of missing Hours of missing wind measurements in this stability class: stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: July -September 2006 Stability Class -Moderately Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Wind Speed (in mph)8-12 13-18 1-3 4-7 19-24 > 24 Total 4 0 1 1 2 9 7 5 4 1 8 8 8 5 4 0 0 2 0 2 2 2 3 6 7 14 7 7 7 5 3 11 1 0 0 0 1 1 4 3 4 5 7 12 26 6 11 5 13 1 0 0 0 0 0 0 0 0 7 15 23 35 4 0 0 0 0 0 9 1 6 6 10 17 21 25 44 48 80 28 28 16 30 5 0 Total 8 37 67 79 99 84 374 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 2 bility classes: Hours of missing stability measurements in all sta 0 LaSalle Nuclear Station period of Record: July -September 2006 Stability Class -Extremely Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE 1-3 0 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total SE SSE S SSW SW WSW W 0 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 0 1 2 1 0 0 0 0 0 0 0 0 0 0 0 3 2 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 2 3 10 6 3 6 2 4 0 1 4 7 9 4 4 0 2 7 0 0 1 14 0 11 0 10 2 18 4 16 0 11 0 17 0 11 6 11 WNW NW NNW Variable Total 0 0 1 0 5 0 0 0 4 2 2 0 0 0 0 9 3 0 7 16 43 49 7 123 Hours of calm in this stability class: Hours of missing wind measurements in this 0 stability class: 0 Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: October -December2006 Stability Class -Extremely Unstable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 0 0 0 0 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 1 1 1 2 0 1 9 2 0 1 4 1 2 0 0 2 5 1 0 18 0 0 0 3 5 3 0 13 2 0 0 6 6 2 2 0 0 0 7 8 6 1 0 0 0 0 0 0 0 0 1 0 0 14 0 1 4 0 0 0 7 0 2 0 1 1 0 0 16 1 0 1 3 1 14 0 0 Total 8 32 53 15 5 113 Hours of Hours of Hours of calm in missing missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 0 LaSalle Nuclear Station Period of Record: October -December2006 Class -Moderately Unstable -200Ft-33Ft Delta-T (F)Stability Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE 1-3 0 0 0 0 4-7 1 0 0 0 8-12 13-18 19-24 > 24 Total 1 8 1 0 5 8 2 0 1 1 1 0 0 8 0 17 0 0 4 0 0 10 E ESE SE SSE S SSW SW WSW W 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 2 1 3 5 3 5 2 12 1 7 WNW NW NNW Variable 0 0 0 1 7 0 Total 0 6 35 32 14 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 90 0 Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: October -December2006 Stability Class -Slightly Unstable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 7 3 4 4 2 6 0 3 6 5 5 1 7 9 6 11 0 11 7 7 6 9 10 1 6 11 14 12 4 13 16 12 17 0 Total 0 10 48 79 17 2 156 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: October -December2006 Stability Class -Neutral -20 Winds Measured at 33 Feet OFt-33Ft Delta-T (F)wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 2 1 1 1 1 0 1 1 1 0 1 0 0 0 0 1 0 Wind Speed (in mph)4-7 8-12 13-18 21 8 12 9 13 9 1 7 15 4 4 7 11 15 7 6 7 11 10 5 10 9 18 10 6 17 17 7 27 28 7 27 13 5 16 5 9 31 18 19 22 45 9 17 9 15 43 26 0 0 0 19-24 > 24 Total 50 33 26 19 36 26 28 38 46 67 51 29 67 106 40 91 0 Total 11 148 277 242 68 7 753 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: October -December2006 Stability Class -Slightly Stable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 5 10 0 3 13 7 10 7 9 3 13 10 6 5 13 4 0 1 1 3 1 7 1 28 32 23 19 13 21 17 7 14 5 0 193 0 0 1 8 2 1 3 4 32 34 28 18 9 17 1 0 0 158 0 0 0 0 0 0 0 0 3 14 13 1 1 5 1 0 0 38 6 13 5 13 24 12 44 44 67 70 67 51 36 39 30 10 0 Total 20 118 4 531 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 LaSalle Nuclear Station Period of Record: October -December2006 Stability Class -Moderately Stable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 2 1 0 0 4 5 13 12 11 9 4 5 2 7 3 0 0 0 0 0 0 4 5 12 28 20 19 7 18 27 7 8 1 0 0 0 0 0 0 0 0 2 3 11 16 3 9 0 0 0 0 44 2 2 0 0 8 11 25 42 34 40 30 26 38 14 11 1 0 Total 3 78 156 3 0 284 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 LaSalle Nuclear Station Period of Record: October -December2006 Stability Class -Extremely Stable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 1 0 0 1 0 0 0 0 0 1 0 7 0 26 0 14 0 18 0 16 0 11 1 11 0 16 0 7 0 C 0 0 0 8-12 13-18 19-24 > 24 Total 0 0 0 0 1 0 22 22 19 11 12 28 15 1 0 0 0 131 1 1 0 0 2 7 48 36 37 28 23 40 32 8 0 0 0 Total 2 128 2 0 0 263 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 LaSalle Nuclear Station Period of Record: October -December2006 Stability Class -Extremely Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 4-7 8-12 13-18 19-24 > 24 Total 2 2 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 11

.LaSalle Nuclear Station Period of Record: October -December2006 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---------------

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N 0 0 2 4 3 2 11 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 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 1 0 1 0 2 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 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 1 0 1 Variable 0 0 0 0 0 0 0 Total 0 0 3 4 5 4 16 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: 11 LaSalle Nuclear Station Period of Record: October -December2006 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----------------

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N 0 0 0 2 4 0 6 NNE 0 0 0 4 0 0 4 NE 0 0 0 0 5 0 5 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 2 2 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 1 1 0 2 SW 0 1 1 2 1 0 5 WSW 0 0 0 0 0 5 5 W 0 0 0 2 1 1 4 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 1 1 0 2 Variable 0 0 0 0 0 0 0 Total 0 1 1 12 13 8 35 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 7 Hours of missing stability measurements in all stability classes: 11 LaSalle Nuclear Station Period of Record: October -December2006 Stability Class -Neutral -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 1 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 Wind Speed (in mph)4-7 8-12 13-18 10 14 13 5 4 13 2 1 16 4 5 9 0 8 20 2 3 11 1 4 10 3 17 10 7 16 21 7 11 19 3 18 23 3 11 2 0 11 25 8 14 25 5 20 20 7 14 28 0 0 0 19-24 > 24 Total 18 17 14 8 9 22 7 10 15 20 9 10 11 31 21 27 0 249 15 8 8 6 5 9 10 0 13 22 17 8 26 17 15 13 0 71 47 42 32 43 47 32 40 72 79 71 34 73 95 81 89 0 948 Total 4 67 171 265 192 50 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 11 LaSalle Nuclear Station Period of Record: October -December2006 Stability Class -Slightly Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 2 1 2 0 1 1 2 0 0 1 1 1 0 0 0 2 0 1 2 4 5 2 0 1 2 5 3 8 0 1 2 1 1 0 2 6 2 1 1 3 8 27 20 5 11 12 10 3 6 17 0 2 0 3 1 1 3 0 21 23 12 10 12 19 20 7 9 0 143 0 1 0 3 4 4 1 9 47 69 45 18 15 29 6 0 0 251 8 14 12 11 14 17 21 66 99 94 80 45 46 56 22 30 0 635 Total 14 38 55 134 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 23 all stability classes: 11 LaSalle Nuclear Station Period of Record: October -December2006 Stability Class -Moderately Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 8 5 7 12 3 5 13 5 2 0 2 0 0 0 1 0 4 11 12 8 9 7 7 24 3 11 0 0 0 0 0 0 0 0 10 27 44 23 4 22 8 1 0 0 4 1 1 0 2 2 7 30 49 63 47 17 35 47 12 13 0 330 Total 1 7 22 62 99 139 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 4 bility classes: Hours of missing stability measurements in all sta 11 LaSalle Nuclear Station Period of Record: October -December2006 Stability Class -Extremely Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 2 4-7 8-12 13-18 19-24 > 24 Total 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 5 0 4 0 4 2 1 0 0 0 0 0 0 0 0 0 0 0 3 1 2 3 0 2 3 1 0 0 0 0 0 0 0 1 3 4 13 13 8 0 1 0 0 0 0 0 0 0 0 0 0 0 7 23 20 5 2 0 0 0 0 0 3 0 0 0 0 1 3 16 37 36 16 7 7 8 4 0 0 5 16 15 43 57 138 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 8 all stability classes: 11

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