Text

Annual Radioactive Effluent Release Report
	ML091250175
Person / Time
Site:	LaSalle
Issue date:	04/17/2009
From:	Wozniak D; Exelon Nuclear
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	FOIA/PA-2010-0209, RA09-031
	Download: ML091250175 (97)
	v • d • e

Exel6n.

LaSalle Generating Station 26o0 NoTth 21st Road Marseilles, I L 61341-9757 www.exelonCOTp.COM Nuclear RA09-031 10 CFR 50.36a April 17, 2009 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:

2008 Annual Radioactive Effluent Release Report Enclosed is the Exelon Generation Company, LLC, 2008 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, David B. Wozniak Site Vice President LaSalle County Station

Attachment:

2008 Effluent and Waste Disposal Annual Report cc:

Regional Administrator - NRC Region III NRC Senior Resident Inspector - LaSalle County Station tIV4~

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

Supplemental Information

1. Regulatory Limits

a.

Gaseous Effluents I) 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:

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

1) 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.

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

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

Supplemental Information (continued)

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 (aci/ml)

Kr-85m 2.00E-04 Kr-85 5.00E-04 Kr-87 4.00E-05 Kr-88 9.OOE-05 Ar-41 7.OOE-05 Xe-131 m 7.OOE-04 Xe-133m 5.OOE-04 Xe-133 6.OOE-04 Xe-135m 2.OOE-04 Xe-135 2.OOE-04

3.

Average Energy

1) 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.

4)

All release types as listed in 1 and 2 above are sampled at the vent stack, and those listed in 3 above are sampled at the Standby Gas Treatment System whenever there is flow. These effluents 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, 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

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

Supplemental Information (continued)

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

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 In the 2008 period, there were no changes to the Process Controll Program (PCP) implementation, processing systems or components. The following procedure changes were implemented as described below.

a.

Revision 6 to RW-AA-100 "Process Control Program for Radioactive Wastes" as per the following summary:

Changed step 4.2.10 for Peach Bottom and Limerick due to Department of Health and Environmental Controls (DHEC) approval for several High Integrity Container (HIC) designs resulting from the acquisition of Nukem and Certificate of Compliance requirements for different disposal sites.

b.

Revision 7 (editorial) to RW-AA-100 "Process Control Program for Radioactive Wastes" as per the following summary:

This revision has been prepared to correct and standardize the use of "shall", "should", "may", and "will" in accordance with AD-AA-101-1002 "Writer's Guide and Process Guide for Procedures and T&RM", moves records retention requirements to section 5, corrects reference at 4.3.1, as well as other format corrections.

c.

Revision 4 to RW-AA-1000 "Radwaste Monthly Report Guideline" as per the following summary:

This revision has been prepared to correct minor format issues, add detail to budget performance indicator, and better define the report distribution.

8.

Effluent Monitoring Instrumentation timeclocks and sample anomalies.

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

Supplemental Information (continued)

a.

Time clocks:

There were no effluent monitoring time clocks exceeded in 2008.

b.

Sample anomalies:

There were no sampling anomalies affecting the measurement of effluents experienced during 2008.

There were two filters pulled from monthly composites to support troubleshooting efforts. The first filter sent for analysis covered the period of 1/16/08 - 1/23/08 and the second filter sent for analysis covered the period of 4/16/08 - 4/22/08. Both incidents were documented in the Corrective Action Program (CAP).

9.

Offsite Dose Calculation Manual Revisions.

There were no revisions made to the ODCM in 2008.

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

UNITS ONE AND TWO DOCKET NUMBERS 50-373 AND 50-374 GASEOUS EFFLUENTS-SUMMATION OF ALL RELEASES Estimated 3rd Qtr_

4' Qtr

]Total Error %

I Units I

1st Qtr I 2nd Qtr I

A. Fission and Activation Gas Releases

1. Total Release Activity Ci 3.66E+02 3.18E+02 2.08E+02 6.90E+02 2.50E+01

2. Average Release Rate uCi/sec 4.66E+01 4.04E+01 2.62E+01 8.68E+01

3. Percent of Technical Specification Limit B. Iodine Releases

1. Total 1-131 Activity Ci 1.19E-02 5.94E-03 1.49E-02 1.37E-02 1.50E+01

2. Average Release Rate uCi/sec 1.51 E-03 7.55E-04 1.87E-03 1.73E-03

3. Percent of Technical Specification Limit C. Particulate (> 8 day half-life) Releases

1. Gross Activity Ci 9.16E-04 7.75E-04 3.79E-04 2.62E-03 3.50E+01

2. Average Release Rate uCi/sec 1.17E-04 9.85E-05 4.76E-05 3.30E-04

3. Percent of Technical Specification Limit

3. Gross Alpha Activity Ci

<1.OOE-11

<1.00E-11

<1.OOE-11

<1.OOE-11 D. Tritium Releases

1. Total Release Activity Ci 2.03E+01 1.11 E+01 9.26E+00 1.77E+01 1.50E+01

2. Average Release Rate uCi/sec 2.59E+00 1.41 E+00 1.16E+00 2.23E+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 (2008)

GASEOUS EFFLUENTS-ELEVATED RELEASE Unit 1 and Unit 2 Continuous Mode I Units I Ist Qtr I

2nd Qtr I

3rd Qtr I

4th Qtr i

1. Fission and Activation Gas Releases Ar-41 Ci

<1.OOE-04

<1.OOE-04 3.16E-04 3.50E-04 Kr-85 Ci

<1.OOE-04

<1.OOE-04 Kr-85m Ci 8.79E+01 1.07E+02 1.02E+02 1.95E+02 Kr-87 Ci 3.25E+00

<1.OOE-04 6.89E+00

<1.OOE-04 Kr-88 Ci 1.51E+02 1.28E+02 6.91E+01 2.89E+02 Xe-131m Ci

<1.OOE-04

<1.OOE-04 Xe-133 Ci 1.22E+02 8.29E+01 3.02E+01 2.06E+02 Xe-I133m Ci

<1.OOE-04

<1.OOE-04 Xe-135 Ci 2.78E+00

<1.OOE-04

<1.OOE-04 3.96E-03 Xe-135m Ci 3.84E-05

<1.OOE-04

<1.OOE-04 Xe-138 Ci

<1.OOE-04

<1.OOE-04 TOTAL Ci 3.66E+02 3.18E+02 2.08E+02 6.90E+02

2. Iodine Releases 1-131 Ci 1.19E-02 5.94E-03 1.49E-02 1.37E-02 1-132 Ci 2.08E-03 6.09E-03 1.59E-03 5.95E-03 1-133 Ci 1.68E-02 1.39E-02 1.45E-02 2.26E-02 1-134 Ci

<1.00E-11

<1.OOE-11

<1.00E-11 1-135 Ci 8.25E-03 3.15E-03 1.78E-03 1.16E-02 TOTAL IODINE Ci 3.90E-02 2.91 E-02 3.28E-02 5.39E-02 TOTAL 1-131, 1-133, 1-135 Ci 3.70E-02 2.30E-02 3.12E-02 4.79E-02

3. Particulate ( > 8 day half-life) Releases Cr-51 Ci

<1.OOE-11

<1.OOE-11 Mn-54 Ci 5.95E-06

<1.OOE-11

<1.OOE-11 1.54E-05 Co-57 Ci

<1.00E-11

<1.OOE-11 Fe-55 Ci

<1.OOE-11

<1.OOE-11 Co-58 Ci

<1.OOE-11

<1.OOE-11 Fe-59 Ci

<1.OOE-11

<1.OOE-11 Co-60 Ci 1.57E-04 1.1OE-04 1.57E-04 1.86E-04 Zn-65 Ci

<1.00E-11

<1.OOE-11

<1.00E-11

<1.00E-11 Sr-89 Ci 1.86E-04 3.24E-04

<1.OOE-11 5.57E-04 Sr-90 Ci

<1.OOE-11

<1.00E-11

<1.OOE-11

<1.OOE-11 Zr-95 Ci

<1.OOE-11

<1.00E-11 Mo-99 Ci

<1.OOE-11

<1.OOE-11 Ru-103 Ci

<1.OOE-1 1

<1.OOE-1 1 Sn-117m Ci

<1.00E-11

<1.OOE-11

<1.00E-11 Cs-134 Ci

<1.OOE-1 1

<1.00E-1 1

<1.OOE-1 1 Cs-137 Ci 6.17E-05

<1.OOE-11

<1.00E-11

<1.OOE-11 Ba\\La-140 Ci 5.05E-04 3.41 E-04 2.22E-04 1.86E-03 Ce-141 Ci

<1.OOE-1 1

<1.OOE-1 1 Ce-144 Ci

<1.OOE-11

<1.00E-11 TOTAL PARTICULATES Ci 9.16E-04 7.75E-04 3.79E-04 2.62E-03

4. Tritium Releases I. Total Release Activity Ci 2.03E+01 1.11 E+01 9.26E+00 1.77E+01::

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

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

LIQUID RELEASES UNIT 1 and UNIT 2 SUMMATION OF ALL LIQUID RELEASES I

Units I 1st Qtr I 2nd Qtr I 3rd Qtr I Estimated 4th Qtr Total Error %

A. Fission and Activation Products

1. Total Activity Released Ci

<LLD

<LLD N/A

2. Average Concentration Released uCi/ml

<LLD

3. Percent of Applicable Limit B. Tritium

1. Total Activity Released Ci

<LLD

<LLD N/A

2. Average Concentration Released uCi/ml

<LLD

3. Percent of Applicable Limit C. Dissolved Noble Gases

1. Total Activity Released Ci

<LLD

<LLD N/A

2. Average Concentration Released uCi/mI

<LLD

3. Percent of Applicable Limit D. Gross Alpha

1. Total Activity Released (estimate)

Ci

<LLD

<LLD N/A

2. Average Concentration Released uCi/ml

<LLD

3. Percent of Applicable Limit JE. Volume of Liquid Waste to Discharge liters 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 N/A IF. Volume of Dilution Water liters 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 (2008)

LIQUID RELEASES UNIT I and UNIT 2 BATCH MODE lNuclides From Batch Releases Units I st Qtr 2nd Qtr 3rd Qtr 4th Qtr H-3 Ci

<LLD

<LLD Cr-51 Ci

<LLD

<LLD Mn-54 Ci

<LLD

<LLD Fe-55 Ci

<LLD

<LLD Co-58 Ci

<LLD

<LLD Fe-59 Ci

<LLD

<LLD Co-60 Ci

<LLD

<LLD Zn-65 Ci

<LLD

<LLD Sr-89 Ci

<LLD

<LLD Sr-90 Ci

<LLD

<LLD Nb-95 Ci

<LLD

<LLD Zr-95 Ci

<LLD

<LLD Mo-99 Ci

<LLD

<LLD Tc-99m Ci

<LLD

<LLD Ag-IOin Ci

<LLD

<LLD Sb-122 Ci

<LLD

<LLD Sb-124 Ci

<LLD

<LLD 1-131 Ci

<LLD

<LLD Cs-134 Ci

<LLD

<LLD Cs-137 Ci

<LLD

<LLD Ba\\La-140 Ci

<LLD

<LLD Ce-141 Ci

<LLD

<LLD Ce-144 Ci

<LLD

<LLD W-187 Ci

<LLD

<LLD TOTAL Ci None None None None Xe-131 m Ci

<LLD

<LLD Xe-133 Ci

<LLD

<LLD Xe-133m Ci

<LLD

<LLD Xe-135 Ci

<LLD

<LLD Xe-135m Ci

<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 (2008)

LIQUID RELEASES UNIT I and UNIT 2 CONTINUOUS MODE

]Nuclides From Continuous Releases I

Units I1st Qtr I 2nd Qtr I 3rd Qtr I 4th Qtr Gross Alpha Ci

<1.00E-07

<1.00E-07 H-3 Ci

<l.00E-05

<1.00E-05

<1.00E-05 Cr-51 Ci

<5.OOE-07

<5.00E-07

<5.00E-07 Mn-54 Ci

<5.OOE-07

<5.OOE-07 Fe-55 (Estimate)

Ci

<l.00E-06 <l.00E-06 <l.00E-06

<1.00E-06 Co-58 Ci

<5.OOE-07

<5.OOE-07 Fe-59 Ci

<5.OOE-07 <5.00E-07

<5.OOE-07

<5.OOE-07 Co-60 Ci

<5.OOE-07

<5.OOE-07 Zn-65 Ci

<5.OOE-07

<5.00E-07

<5.OOE-07

<5.OOE-07 Sr-89 (Estimate)

Ci

<5.OOE-08

<5.OOE-08 Sr-90 (Estimate)

Ci

<5.OOE-08

<5.OOE-08 Nb-95 Ci

<5.OOE-07

<5.OOE-07 Zr-95 Ci

<5.OOE-07

<5.OOE-07 Mo-99 Ci

<5.OOE-07

<5.OOE-07 Tc-99m Ci

<5.OOE-07

<5.00E-07 <5.00E-07 Ag-l10m Ci

<5.00E-07

<5.OOE-07

<5.00E-07 <5.00E-07 Sb-122 Ci

<5.OOE-07

<5.OOE-07 Sb-124 Ci

<5.OOE-07

<5.OOE-07 1-131 Ci

<I.00E-06 <l.00E-06 <1.00E-06

<1.00E-06 Cs-134 Ci

<5.OOE-07

<5.OOE-07 Cs-137 Ci

<5.OOE-07

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

<5.OOE-07

<5.OOE-07 Ce-141 Ci

<5.OOE-07

<5.OOE-07 Ce-144 Ci

<5.OOE-07

<5.OOE-07 W-187 Ci

<5.00E-07

<5.OOE-07

<5.OOE-07 TOTAL Ci

<LLD

<LLD Xe-131 m Ci

<1.00E-05

<I.00E-05

<1.00E-05

<1.00E-05 Xe-133 Ci

<I.00E-05

<I1.00E-05

<1.00E-05

<l1.00E-05 Xe-133m Ci

<I.00E-05 <l.00E-05

<l.00E-05

<l.00E-05 Xe-135 Ci

<l1.00E-05

<l.00E-05

<I.00E-05

<1.00E-05 Xe-135m Ci

<1.00E-05

<I.00E-05

<1.00E-05

<1.00E-05 TOTAL Ci

<LLD

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

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

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.

3.91E+00

b.

Total activity Ci 6.68E+01

c.

Major nuclides (estimate %)

Fe-55 1.00E+01 Co-60 3.86E+01 Ni-63 4.40E+01 Zn-65 1.15E+00 Sr-90 3.72E+00 Cs-137 1.73E+00

d.

Shipment type

e.

Solidification agent

2.

Dry compressible waste, contaminated equipment, etc.

a.

Quantity shipped cu.m.

b.

Total activity Ci

c.

Major nuclides (estimate %)

Mn-54 Fe-55 Co-60

d.

Shipment type

e.

Solidification agent

3.

Irradiated Components

a.

Quantity shipped cu.m.

b.

Total activity Ci

c.

Major nuclides (estimate %)

d.

Shipment type

e.

Solidification agent LSA, Class A, Class B None 5.86E+02 3.24E+00 6.08E+00 1.97E+01 7.12E+01 LSA None 0.OOE+00 0.OOE+00 N/A N/A N/A

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FIRST QUARTER

4.

Other a.

b.

C.

Quantity shipped cu.m.

Total activity Ci Major nuclides (estimate %)

Mn-54 Fe-55 Co-60 Ni-63 Zn-65 Cs-137 2.86E+02 2.78E+00 2.66E+00 4.53E+01 4.72E+01 1.95E+00 1.29E+00 1.01E+00

d.

Shipment type

e.

Solidification agent

5.

Solid Waste Disposition Class A None Number of Shipments Transportation Mode 3

Truck 7

Truck 14 Truck 1

Truck 25 Destination Clive Disposal Facility (Bulk)

Duratek -Gallaher Rd.

Facility Duratek - Bear Creek Rd.

Facility Studsvik Processing Facility TOTAL THIS QUARTER Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Jan-Mar) 2.50E+01 Estimated total error % for dry compressible waste, contaminated equipment, etc. (Jan-Mar) 2.50E+01 Estimated total error % for irradiated components (Jan-Mar) N/A B.

IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

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.

9.83E+00 7.37E+02

b.

Total activity Ci

c.

Major nuclides (estimate %)

Mn-54 Fe-55 Co-60 Ni-63 Zn-65 Cs-137 2.19E+00 3.5 1E+01 5.37E+01 1.57E+00 2.7 1E+00 3.73E+00

d.

Shipment type

e.

Solidification agent LSA, Class A None

2.

Dry compressible waste, contaminated equipment, etc.

a.

Quantity shipped cu.m.

5.44E+i02 3.70E-01

b.

Total activity Ci

c.

Major nuclides (estimate %)

Mn-54 Fe-55 Co-60 6.02E+00 1.96E+01 7.08E+01

d.

Shipment type

e.

Solidification agent LSA None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS SECOND QUARTER

3.

Irradiated Components (CRD Blades, LPRM Strings, SRM's)

a.

Quantity shipped cu.m.

5.73E+00

b.

Total activity Ci 7.16E+04

c.

Major nuclides (estimate %)

Co-60 4.89E+01 Fe-55 4.37E+01 Ni-63 3.64E+00 Mn-54 1.98E+00 Cr-51 1.07E+00 d.

e.

4.

Other a.

b.

C.

Shipment type Solidification agent Quantity shipped cu.m.

Total activity Ci Major nuclides (estimate %)

Cr-51 Mn-54 Fe-55 Co-60 Ni-63 Class C None 7.25E+01 1.25E-01 1.98E+00 3.70E+00 4.OOE-i-1 5.04E+01I 2.63E+00

d.

Shipment type

e.

Solidification agent

5.

Solid Waste Disposition Class A None Number of Shipments Transportation Mode 8

Truck 13 Truck 2

Truck Destination Barnwell Disposal Facility Duratek - Bear Creek Rd.

Facility Studsvik Processing Facility TOTAL THIS QUARTER 23 Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Apr-Jun) 2.50E+01 Estimated total error % for dry compressible waste, contaminated equipment, etc. (Apr-Jun) 2.50E+01 Estimated total error % for irradiated components (Apr-Jun) 2.50E+O 1 B.

IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS THIRD QUARTER A.

SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL I.

Spent resins, filter sludges, evaporator bottoms, etc.

a.

Quantity shipped cu.m.

2.53E+00

b.

Total activity Ci 5.27E+00

c.

Major nuclides (estimate %)

Mn-54 6.07E+00 Fe-55 1.97E+0 I Co-60 7.13E+01 d.

e.

2.

Dry a.

b.

C.

Shipment type LSA, Class A Solidification agent None compressible waste, contaminated equipment, etc.

Quantity shipped cu.m.

5.44E+0 I Total activity Ci 1.1OE-0I Major nuclides (estimate %)

Mn-54 6.02E+00 Fe-55 1.96E+01 Co-60 7.08E+01

d.

Shipment type

e.

Solidification agent LSA None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS THIRD QUARTER

3.

Irradiated Components (CRD Blades, LPRM Strings, SRM's)

a.

Quantity shipped cu.m.

0.OOE+00

b.

Total activity Ci 0.OOE+00

c.

Major nuclides (estimate %)

N/A

d.

Shipment type N/A

e.

Solidification agent N/A

4.

Other

a.

Quantity shipped cu.m.

4.70E+01

b.

Total activity Ci 9.45E-02

c.

Major nuclides (estimate %)

H-3 9.97E+01

d.

Shipment type Class A

e.

Solidification agent None

5.

Solid Waste Disposition Number of Shipments Transportation Mode Destination 3

Truck Duratek -Gallaher Rd.

Facility 3

Truck Duratek - Bear Creek Rd.

Facility TOTAL THIS QUARTER 6

Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Jul-Sep) 2.50E+0 I Estimated total error % for dry compressible waste, contaminated equipment, etc. (Jul-Sep) 2.50E+01 Estimated total error % for irradiated components (Jul-Sep) N/A B.

IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

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.

7.53E+01

b.

Total activity Ci 7.87E+01

c.

Major nuclides (estimate %)

Mn-54 1.1 3E+00 Fe-55 1.56E+01 Co-60 7.38E+01 Ni-63 1.07E+00 Zn-65 1.41E+00 Cs-137 4.35E+00

d.

Shipment type LSA, Class A

e.

Solidification agent None

2.

Dry compressible waste, contaminated equipment, etc.

a.

Quantity shipped cu.m.

7.69E+0 1

b.

Total activity Ci 5.43E-01

c.

Major nuclides (estimate %)

Mn-54 6.08E+00 Fe-55 1.97E+01 Co-60 7.12E+O1

d.

Shipment type LSA

e.

Solidification agent None

3.

Irradiated Components

a.

Quantity shipped cu.m.

0.OOE+00

b.

Total activity Ci 0.OOE+00

c.

Major nuclides (estimate %)

N/A

d.

Shipment type N/A

e.

Solidification agent N/A

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FOURTH QUARTER

4.

Other

a.

Quantity shipped cu.m.

b.

Total activity Ci

c.

Major nuclides (estimate %)

H-3 Fe-55 Co-60

d.

Shipment type

e.

Solidification agent

5.

Solid Waste Disposition 2.30E+01 1.52E-04 6.71E+01 6.53E+00 2.56E+0 1 Class A None Number of Shipments 1

9 1

5 Transportation Mode Destination Truck Clive Disposal Facility (Bulk)

Truck Clive Disposal Facility (Containerized)

Truck Duratek - Bear Creek Rd.

Facility Truck Duratek - Gallaher Rd.

Facility TOTAL THIS QUARTER 16 Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Oct-Dec) 2.50E+01 Estimated total error % for dry compressible waste, contaminated equipment, etc. (Oct-Dec) 2.50E+01 Estimated total error % for other irradiated components (Oct-Dec) N/A B.

IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

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

AIRBORNE Effluents-10CFR50 Listing 23-mar-2009 12:47:54 STATION:

UNIT:

PERIOD:

NAME:

REPORT:

MODE:

LASALLE STATION 1

01/01/08 12/31/08 ODCMLAS ANNUAL ACTUAL

LASALLE STATION UNIT ONE ACTUAL 2008 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -

01/01/08 TO 12/31/08 CALCULATED 03/23/09 INFANT RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 6.58E-03 5.62E-03 3.24E-03 1.26E-02 2.80E-02 (MRAD)

(WSW

)

(WSW

)

(WSW )

(WSW

)

(WSW)

BETA AIR 1.93E-04 1.66E-04 1.24E-04 3.57E-04 8.40E-04 (MRAD)

(ESE )

(ESE)

TOT.

BODY 4.98E-03 4.25E-03 2.45E-03 9.50E-03 2.12E-02 (MREM)

(WSW )

(WSW

)

(WSW

)

(WSW )

(WSW)

SKIN 5.22E-03 4.45E-03 2.59E-03 9.95E-03 2.22E-02 (MREM)

(WSW )

(WSW

)

(WSW )

(WSW

)

(WSW)

ORGAN 1.90E-03 1.01E-02 3.65E-02 1.18E-02 6.03E-02 (MREM)

(ESE )

(ESE)

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2008 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 0.13 0.11 0.06 0.25 10.0 0.28 BETA AIR (MRAD) 10.0 0.00 0.00 0.00 0.00 20.0 0.00 TOT.

BODY (MREM) 2.5 0.20 0.17 0.10 0.38 5.0 0.42 SKIN (MREM) 7.5 0.07 0.06 0.03 0.13 15.0 0.15 ORGAN (MREM) 7.5 0.03 0.13 0.49 0.16 15.0 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 2008 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -

01/01/08 TO 12/31/08 CALCULATED 03/23/09 TYPE GAMMA AIR (MRAD)

BETA AIR (MRAD)

TOT.

BODY (MREM)

SKIN (MREM)

ORGAN (MREM) 1ST QUARTER JAN-MAR 6.58E-03 (WSW 1.93E-04 (ESE )

4.98E-03 (WSW) 5.22E-03 (WSW) 1.59E-03 (NNE)

CHILD RECEPTOR 2ND 3RD QUARTER QUARTER APR-JUN JUL-SEP 5.62E-03 3.24E-03 (WSW

)

(WSW) 1.66E-04 1.24E-04 (ESE )

(ESE) 4.25E-03 2.45E-03 (WSW

)

(WSW) 4.45E-03 2.59E-03 (WSW

)

(WSW) 1.30E-02 3.94E-02 (NNE

)

(ESE) 4TH QUARTER OCT-DEC 1.26E-02 (WSW) 3.57E-04 (ESE) 9.50E-03 (WSW) 9.95E-03 (WSW) 1.40E-02 (NNE)

ANNUAL

2. 80E-02 (WSW) 8.40E-04 (ESE)

2. 12E-02 (WSW) 2.22E-02 (WSW) 6.78E-02 (NNE)

THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2008 THYROID THYROID COMPLIANCE STATUS -

10CFR 50 APP.

I CHILD 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 0.13 0.00 0.20 0.07 0.02 2ND QTR 3RD QTR APR-JUN JUL-SEP 0.11 0.06 0.00 0.00 4TH QTR OCT-DEC 0.25 0.00 0.38 0.13 0.19 YRLY OBJ 10.0 20.0 5.0 15.0 15.0 0.17 0.06 0.17 0.10 0.03 0.53

% OF APP.

I 0.28 0.00 0.42 0.15 0.45 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 2008 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -

01/01/08 TO 12/31/08 CALCULATED 03/23/09 TEENAGER RECEPTOR TYPE GAMMA AIR (MRAD)

BETA AIR (MRAD)

TOT.

BODY (MREM)

SKIN (MREM)

ORGAN (MREM) 1ST QUARTER JAN-MAR 6.58E-03 (WSW) 1.93E-04 (ESE) 4.98E-03 (WSW) 5.22E-03 (WSW) 1.18E-03 (NNE) 2ND QUARTER APR-JUN 5.62E-03 (WSW) 1.66E-04 (ESE) 4.25E-03 (WSW) 4.45E-03 (WSW) 8.12E-03 (NNE) 3RD QUARTER JUL-SEP 3.24E-03 (WSW) 1.24E-04 (ESE) 2.45E-03 (WSW) 2.59E-03 (WSW) 2.41E-02 (NNE) 4TH QUARTER OCT-DEC 1.26E-02 (WSW 3.57E-04 (ESE) 9.50E-03 (WSW) 9.95E-03 (WSW) 8.79E-03 (NNE)

ANNUAL 2.80E-02 (WSW) 8.40E-04 (ESE

)

2. 12E-02 (WSW) 2.22E-02 (WSW)

4. 22E-02 (NNE)

THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2008 THYROID THYROID COMPLIANCE STATUS -

10CFR 50 APP.

I TEENAGER RECEPTOR

% OF APP I.

GAMMA AIR (MIRAD)

BETA AIR (MRAD)

TOT.

BODY (MREM)

SKIN (MREM)

ORGAN (MREM)

QTRLY 1ST QTR 2ND QTR 3RD QTR OBJ JAN-MAR APR-JUN JUL-SEP 5.0 0.13 0.11 0.06 10.0 0.00 0.00 0.00 2.5 0.20 0.17 0.10 7.5 0.07 0.06 0.03 7.5 0.02 0.11 0.32 4TH QTR OCT-DEC 0.25 0.00 0.38 0.13 0.12 YRLY OBJ 10.0 20.0 5.0 15.0 15.0

% OF APP.

I 0.28 0.00 0.42 0.15 0.28 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 2008 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -

01/01/08 TO 12/31/08 CALCULATED 03/23/09 ADULT RECEPTOR TYPE GAMMA AIR (MRAD)

BETA AIR (MRAD)

TOT.

BODY (MREM)

SKIN (MREM)

ORGAN (MREM) 1ST QUARTER JAN-MAR 6.58E-03 (WSW) 1.93E-04 (ESE )

4.98E-03 (WSW) 5.22E-03 (WSW) 1.31E-03 (NNE) 2ND QUARTER APR-JUN 5.62E-03 (WSW) 1.66E-04 (ESE )

4.25E-03 (WSW) 4.45E-03 (WSW) 8.17E-03 (NNE) 3RD QUARTER JUL-SEP 3.24E-03 (WSW) 1.24E-04 (ESE) 2.45E-03 (WSW) 2.59E-03 (WSW) 2.49E-02 (NNE) 4TH QUARTER OCT-DEC 1.26E-02 (WSW) 3.57E-04 (ESE) 9.50E-03 (WSW) 9.95E-03 (WSW) 8.96E-03 (NNE)

ANNUAL

2. 80E-02 (WSW)

8. 40E-04 (ESE )

2. 12E-02 (WSW) 2. 22E-02 (WSW)

4. 33E-02 (NNE)

THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2008 THYROID THYROID COMPLIANCE STATUS -

10CFR 50 APP.

I ADULT 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 IST QTR JAN-MAR 0.13 0.00 0.20 0.07 0.02 2ND QTR APR-JUN 0.11 0.00 0.17 0.06 0.11 3RD QTR 4TH QTR YRLY JUL-SEP OCT-DEC OBJ 0.06 0.25 10.0 0.00 0.00 20.0 0.10 0.38.

5.0 0.03 0.13 15.0 0.33 0.12 15.0

% OF APP.

I 0.28 0.00 0.42 0.15 0.29 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

AQUATIC Effluents-IOCFR50 Listing 23-mar-2009 12:49:42 STATION:

UNIT:

PERIOD:

NAME:

REPORT:

MODE:

LASALLE STATION 1

01/01/08 12/31/08 ODCMLAS ANNUAL ACTUAL

LASALLE STATION UNIT ONE ACTUAL 2008 MAXIMUM DOSES (MREM)

RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -

01/01/08 TO 12/31/08 CALCULATED 03/23/09 INFANT RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2008 COMPLIANCE STATUS 10 CFR 50 APP.

I O%

OF APP I.

QTRLY IST 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 CRIT.

ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 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 2008 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY PERIOD OF RELEASE 01/01/08 TO 12/31/08 INFANT RECEPTOR WATER SYSTEM

CALCULATED 03/23/09 DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.00E+00 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2008 COMPLIANCE STATUS -

40 CFR 141 TYPE TOTAL BODY INTERNAL ORGAN ANNUAL LIMIT 4.0 MREM 4.0 MREM

% OF LIMIT 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 ODCM SOFTWARE VERSION 1.1 ODCM DATABASE VERSION 1.1 MAY 2001 January 1995 January 1995

LASALLE STATION UNIT ONE ACTUAL 2008 MAXIMUM DOSES (MREM)

RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -

01/01/08 TO 12/31/08 CALCULATED 03/23/09 CHILD RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN IST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2008 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 CRIT.

ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 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 2008 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY PERIOD OF RELEASE -

01/01/08 TO 12/31/08 CHILD RECEPTOR WATER SYSTEM

CALCULATED 03/23/09 DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2008 COMPLIANCE STATUS -

40 CFR 141 TYPE TOTAL BODY INTERNAL ORGAN ANNUAL LIMIT 4.0 MREM 4.0 MREM

% OF LIMIT 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 ODCM SOFTWARE VERSION 1.1 ODCM DATABASE VERSION 1.1 MAY 2001 January 1995 January 1995

LASALLE STATION UNIT ONE MAXIMUM DOSES PERIOD OF RELEASE -

ACTUAL 2008 (MREM)

RESULTING FROM 01/01/08 TO 12/31/08 TEENAGER RECEPTOR AQUATIC EFFLUENTS CALCULATED 03/23/09 DOSE TYPE TOTAL BODY INTERNAL ORGAN IST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2008 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 CRIT.

ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 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 2008 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY PERIOD OF RELEASE -

01/01/08 TO 12/31/08 TEENAGER RECEPTOR WATER SYSTEM

CALCULATED 03/23/09 DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2008 COMPLIANCE STATUS -

40 CFR 141 TYPE TOTAL BODY INTERNAL ORGAN ANNUAL LIMIT 4.0 MREM 4.0 MREM

% OF LIMIT 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 2008 MAXIMUM DOSES (MREM)

RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -

01/01/08 TO 12/31/08 CALCULATED 03/23/09 ADULT RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN IST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2008 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 CRIT.

ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 0.00 10.0 0.00 RESULTS BASED UPON:

ODCM ANNEX REVISION ODCM SOFTWARE VERSION ODCM DATABASE VERSION 3.0 MAY 2001 1.1 January 1995 1.1 January 1995

LASALLE STATION UNIT ONE 2008 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY PERIOD OF RELEASE -

01/01/08 TO 12/31/08 ADULT RECEPTOR WATER SYSTEM

CALCULATED 03/23/09 DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.00E+00 0.00E+00 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2008 COMPLIANCE STATUS -

40 CFR 141 TYPE TOTAL BODY INTERNAL ORGAN ANNUAL LIMIT 4.0 MREM 4.0 MREM

% OF LIMIT 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 ODCM SOFTWARE VERSION ODCM DATABASE VERSION 3.0 MAY 2001 1.1 January 1995 1.1 January 1995

23-mar-2009 13:30:18 Total Effective Dose Equivalent -

10CFR20 Listing STATION:

LASALLE STATION UNIT:

1 PERIOD:

01/01/08 12/31/08 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 01/01/08 to 12/31/08 Aquatic Effluents are complete from 01/01/08 to 12/31/08 Skyshine entries are complete from 01/01/08 to 12/31/08

LASALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/08 TO 12/31/08 CALCULATED 03/23/09

1.

10 CFR 20.1301 (a) (1) Compliance Total Effective Dose Eqivalent, mrem/yr 3.43E-01 10 CFR 20.1301 (a) (1) limit mrem/yr 100.0

% of limit 0.34 Compliance ist 2nd Qtr Qtr TEDE 5.89E-02 9.44E-02 Summary -

3rd Qtr 9.08E-02 IOCFR20 4th Qtr

9. 90E-02

% of Limit 0.34 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 01/01/08 TO 12/31/08 CALCULATED 03/23/09

2.

10 CFR 20.1301 (d)/40 CFR 190 Compliance Dose Limit

% of (mrem)

(mrem)

Limit Whole Body (DDE)

Plume Skyshi Groun Organ Dose (CDE)

Thyroi Gonads Breast Lung Marrow Bone Remaii CEDE TEDE

2. 12E-02 Lne 3.15E-01 1

5.57E-04 Total 3.36E-01 Ld 3.75E-02 5.69E-03 t

5.69E-03 5.69E-03 5.70E-03 5.70E-03 nder 5.73E-03 25.0 75.0 25.0 25.0 25.0 25.0 25.0 25.0 1.35 0.05 0.02 0.02 0.02 0.02 0.02 0.02

6. 66E-03 3.43E-01 100.0 0.34 RESULTS BASED UPON: ODCM ODCM ODCM ANNEX REVISION 3.0 MAY 2001 SOFTWARE VERSION 1.1 January 1995 DATABASE VERSION 1.1 January 1995

23-mar-2009 13:31:48 Total Effective Dose Equivalent 10CFR20 Listing STATION:

LASALLE STATION UNIT:

2 PERIOD:

01/01/08 12/31/08 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 01/01/08 to 12/31/08

LASALLE STATION UNIT TWO 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/08 TO 12/31/08 CALCULATED 03/23/09

1.

10 CFR 20.1301 (a) (1) Compliance Total Effective Dose Eqivalent, mrem/yr 3.54E-01 10 CFR 20.1301 (a) (1) limit mrem/yr 100.0 0.35

% of limit Compliance Summary -

10CFR20 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr

% of Limit 0.35 TEDE 8.92E-02 8.83E-02 8.73E-02 8.93E-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 01/01/08 TO 12/31/08 CALCULATED 03/23/09

2.

10 CFR 20.1301 (d)/40 CFR 190 Compliance Dose Limit

% of (mrem)

(mrem)

Limit Whole Body (DDE)

Plume Skyshi Ground

0. OOE+00 ne 3.54E-01 1

0.OOE+00 Total 3.54E-01 25.0 Organ Dose Thyroid 0.OOE+00 75.0 (CDE)

Gonads Breast Lung Marrow Bone Remainder CEDE TEDE

0. OOE+00

0. OOE+00 0 OOE+00

0. OOE+00 25.0 25.0 25.0 25.0 25.0 25.0 1.42 0.00 0.00 0.00 0.00 0.00 0.00 0.00

0. OOE+00 3.54E-01 100.0 0.35 RESULTS BASED UPON: ODCM ODCM ODCM ANNEX REVISION 3.0 MAY 2001 SOFTWARE VERSION 1.1 January 1995 DATABASE VERSION 1.1 January 1995

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

METEOROLOGICAL DATA

LaSalle County Generating Station Period of Record: January -

March 2008 Stability Class -

Extremely Unstable 200Ft-33Ft Delta-T (F)

Winds Measured at 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) 1-3 4-7 8-12 13-18 19-24

> 24 Total 1

1 16 7

0 0

9 0

0 1

0 0

2 6

0 Total 0

1 11 7

18 6

43 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:

I

LaSalle County Generating Station Period of Record: January -

March 2008 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 12 8

3 0

0 2

3 0

0 2

3 1

4 4

5 9

0 Total 0

3 17 26 8

2 56 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:

1

LaSalle County Generating Station Period of Record: January -

March 2008 Stability Class - Slightly Unstable 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 1-3 4-7 0

2 0

0 1

0 0

1 0

0 0

Wind Speed (in mph) 8-12 13-18 19-24

> 24 1

1 1

0 7

5 0

0 4

0 0

0 1

0 0

4 0

0 3

3 0

0 0

0 2

0 0

0 2

2 0

0 5

0 0

0 2

2 1

1 8

10 0

1 1

3 1

1 0

6 2

0 2

3 2

0 0

0 Total 3

14 4

0 2

4 6

3 0

5 5

6 19 6

8 7

0 Total 0

5 36 39 9

3 92 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:

1

LaSalle County Generating Station Period of Record: January -

March 2008 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 23 7

4 2

2 2

3 7

12 5

11 24 14 11 8

0 36 49 19 12 35 8

8 22 12 21 18 15 34 31 43 44 0

407 17 6

22 26 32 26 15 13 23 25 10 11 35 96 41 46 0

0 0

1 12 10 9

1 6

5 7

12 3

6 31 12 5

0 0

1 5

1 7

21 7

0 0

67 78 49 55 80 46 26 46 47 68 54 43 106 195 114 103 0

Total 15 149 444 120 42 1177 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:

I

LaSalle County Generating Station Period of Record: January -

March 2008 Stability Class - Slightly Stable Winds Measured at 200Ft-33Ft Delta-T (F) 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW 0

18 1

23 1

4 5

3 2

1 0

2 1

2 0

0 0

9 0

0 0

0 1

1 0

19 0

28 0

0 9

4 3

15 1

12 11 3

13 9

20 9

7 2

11 32 11 0

28 0

26 0

25 0

39 5

62 5

85 1

33 0

17 3

35 0

10 9

43 18 3

2 3

3 9

9 9

11 4

5 8

1 9

6 1

12 6

18 20 65 0

12 31 1

0 6

0 Variable Total 4

0 154 6

0 0

144 2

0 0

2 53 0

.11 0

0 18 122 65 36 539 Hours of calm in Hours of missing Hours of missing this stability class:

wind measurements in this stability measurements in 1

stability class:

0 all stability classes:

LaSalle County Generating Station Period of Record: January -

March 2008 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

NNE NE ENE E

ESE SE SSE 0

0 1

0 0

1 2

0 0

2 0

0 0

2 3

3 0

0 0

0 2

5 2

5 10 S

5 5

0 0

4 1

9 4

0 5

5 1

1 0

0 0

0 4

1 0

0 0

1 0

0 0

6 0

0 0

SSW SW WSW W

WNW 1

0 4

8 9

2 0

2 10 5

8 8

7 7

9 0

17 0

25 0

17 0

12 0

20 0

22 0

35 0

18 0

22 11 NW NNW 0

0 0

5 12 2

0 0

0 2

0 Variable Total 4

72 80 30 0

192 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:

1

LaSalle County Generating Station Period of Record: January -

March 2008 Stability Class -

Extremely Stable Winds Measured at

- 200Ft-33Ft 33 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE 1-3 4-7 8-12 13-18 19-24

> 24 Total NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 0

0 0

1 1

4 5

0 0

2 5

0 0

3 0

0 0

0 1

1 0

0 0

0 4

7 8

4 11 6

12 0

19 0

19 4

2 7

1 0

0 3

4 1

0 0

8 6

8 2

0 0

Variable Total 0

35 39 0

83 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:

1

LaSalle County Generating Station Period of Record: January -

Stability Class -

Extremely Unstable Winds Measured at 375 March 2008 375Ft-33Ft Delta-T (F)

Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

1-3 0

0 0

0 4-7 8-12 13-18 19-24

> 24 Total 0

0 0

0 NW NNW 0

0 0

0 Variable Total 0

0 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:

LaSalle County Generating Station Period of Record: January -

Stability Class - Moderately Unstable Winds Measured at 375 March 2008 375Ft-33Ft Feet Delta-T (F)

Wind Direction N

NNE NE ENE Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total 0

0 0

0 E

ESE SE SSE S

SSW SW WSW W

WNW NW 0

0 0

0 3

0 0

3 0

0 0

0 3

0 0

Variable Total 3

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:

1

LaSalle County Generating Station Period of Record: January -

March 2008 Stability Class -

Slightly Unstable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

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 1

2 4

8 15 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:

1

LaSalle County Generating Station Period of Record: January -

March 2008 Stability Class - Neutral

- 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

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 4

5 6

3 1

2 1

2 6

3 3

17 9

8 5

5 0

20 25 16 10 6

6 6

4 5

9 11 14 26 17 29 15 0

27 48 13 20 17 17 12 14 10 13 14 13 26 39 47 26 0

34 25 13 28 16 20 8

12 22 20 12 9

35 71 34 24 0

2 6

13 14 11 6

2 2

22 28 15 3

38 73 9

6 0

87 110 61 75 52 52 29 35 66 73 57 56 135 210 125 76 0

Total 11 80 219 356 383 250 1299 Hours of calm in this stability class:

0 Hours of missing wind measurements in this sitability class:

59 11 stability classes:

Hours of missing stability measurements in a:

1

LaSalle County Generating Station Period of Record: January -

March 2008 Stability Class -

Slightly Stable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

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 3

6 4

0 1

0 0

4 3

3 5

4 13 10 8

2 0

6 11 6

7 8

4 3

13 11 11 4

0 6

9 22 7

0 1

1 9

7 2

18 10 8

4 5

7 7

19 0

0 0

0 5

10 6

11 57 78 7

4 25 53 6

0 0

10 17 11 9

25 23 12 50 83 106 22 15 56 83 58 12 0

592 Total 10 27 66 128 99 262 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:

1

LaSalle County Generating Station Period of Record: January -

March 2008 Stability Class -

Moderately Stable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE 1-3 0

0 0

4-7 8-12 13-18 19-24

> 24 Total SE SSE 0

0 S

1 0

0 0

0 1

1 0

0 1

0 0

0 2

0 1

1 3

0 1

4 3

2 4

0 0

0 1

0 0

1 2

2 1

2 6

6 8

9 3

0 1

0 0

0 2

0 1

4 0

0 0

3 3

0 0

1 3

4 12 0

0 4

4 6

0 18 23 3

16 21 SSW SW WSW W

WNW NW 2

5 4

0 9

5 0

1 6

7 23 7

21 2

12 2

25 0

0 8

0 Variable Total 7

22 41 36 63 169 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:

1

LaSalle County Generating Station Period of Record: January -

Stability Class - Extremely Stable Winds Measured at 375 March 2008 375Ft-33Ft Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

1-3 1

0 0

0 1

0 0

0 4-7 8-12 13-18 19-24

> 24 Total 0

0 0

0 1

0 0

2 2

0 0

0 5

1 14 18 WNW 5

0 0

1 0

2 0

0 0

0 1

9 4

1 NW 0

NNW 1

0 4

0 Variable 0

3 Total 0

4 11 10 16 44 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:

1

LaSalle County Generating Station Period of Record: April - June 2008 Stability Class - Extremely Unstable 200Ft-33Ft Delta-T (F)

Winds Measured at 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) 1-3 4-7 8-12 13-18 19-24

> 24 Total 0

0 0

0 3

10 1

4 0

0 0

0 1

1 1

1 5

12 19 3

6 4

11 5

0 0

Total 0

3 15 19 18 14 69

.y class:

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

0 Hours of missing stability measurements in all stability classes:

3

LaSalle County Generating Station Period of Record: April -

June 2008 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 7

0 0

7 5

7 1

9 10 12 10 14 10 25 10 6

0 Total 1

4 29 63 20 16 133 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 County Generating Station Period of Record: April -

June 2008 Stability Class - Slightly Unstable 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 8

11 1

3 2

2 0

2 3

5 6

10 4

5 6

7 0

0 3

2 5

1 0

3 5

3 7

1 12 6

8 11 18 0

12 14 3

11 3

5 10 7

13 19 13 31 13 15 19 25 0

Total 0

12 75 85 33 8

213 Hours of calm in this stability class:

0 Hours of missing wind measurements in this sitability class:

0 11 stability classes:

Hours of missing stability measurements in a*

3

LaSalle County Generating Station Period of Record: April - June 2008 Stability Class - Neutral 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 Total Wind Speed (in mph) 4-7 8-12 13-18 1-3 19-24

> 24 Total 28 21 9

4 6

5 5

7 5

7 6

6 15 12 9

6 0

15 12 28 11 12 9

16 6

12 10 12 22 15 20 32 29 0

261 2

3 33 27 14 5

4 10 18 17 14 16 13 15 25 22 0

238 3

1 1

7 1

1 3

1 20 8

8 6

16 12 2

5 0

48 37 72 53 35 23 34 24 58 46 51 55 65 59 69 62 0

9 151 95 37 791 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 County Generating Station Period of Record: April - June 2008 Stability Class - Slightly Stable 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 22 15 3

7 6

2 8

6 4

10 10 7

16 10 0

5 6

14 7

13 11 8

6 12 22 16 15 13 7

4 8

0 0

1 1

7 2

7 5

14 36 46 7

11 3

5 2

1 0

27 23 19 21 21 32 19 23 64 78 29 41 35 32 22 20 0

Total 13 139 167 148 35 4

506 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 County Generating Station Period of Record: April - June 2008 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) 1-3 4-7 8-12 13-18 19-24

> 24 Total 2

4 3

2 13 4

3 5

7 6

7 10 13 32 4

5 0

0 0

13 13 14 4

11 14 8

10 10 5

5 0

0 2

5 3

3 27 18 19 10 21 22 25 24 25 41 9

5 0

Total 15 120 107 17 0

0 259 Hours of calm in this stability class:

1 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

LaSalle County Generating Station Period of Record: April -

June 2008 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 8-12 13-18 19-24

> 24 Total 0

0 0

1 2

10 10 13 11 6

10 11 15 21 7

0 0

0 3

13 10 4

13 19 17 10 1

0 0

0 90 0

0 0

1 2

13 24 23 15 19 29 29 25 22 7

0 0

Total 2

117 0

0 0

209 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 County Generating Station Period of Record: April - June 2008 Stability Class -

Extremely Unstable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

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 3

3 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 County Generating Station Period of Record: April - June 2008 Stability Class - Moderately Unstable

- 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total 9

13 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 County Generating Station Period of Record: April - June 2008 Stability Class - Slightly Unstable

- 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

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 9

15 12 22 59 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 County Generating Station Period 6f Record: April - June 2008 Stability Class - Neutral

- 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

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 13 8

1 3

4 2

1 7

6 5

12 7

7 6

0 8-12 13-18 19-24

> 24 16 20 5

3 14 19 20 4

12 18 36 15 6

12 22 11 5

13 6

7 11 6

2 12 12 8

15 7

9 18 7

5 7

7 25 47 16 9

16 40 14 14 15 18 12 40 22 22 13 12 16 21 22 25 41 14 17 43 35 7

16 23 19 5

0 0

Total 57 65 83 55 37 33 47 41 87 88 67 101 74 109 109 69 0

Total 5

88 202 287 302 238 1122 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 County Generating Station Period of Record: April -

June 2008 Stability Class - Slightly Stable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

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

10 9

9 4

3 7

4 4

6 3

6 6

6 12 2

0 12 11 7

8 9

3 4

5 4

5 6

11 8

16 9

11 0

6 3

5 12 5

8 2

7 9

16 11 9

14 11 6

8 0

0 0

0 2

1 14 11 11 46 68 22 13 17 11 2

0 0

29 27 24 32 19 29 24 28 66 96 43 43 48 46 35 28 0

Total 4

36 98 129 132 218 617 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 County Generating Station Period of Record: April -

June 2008 Stability Class -

Moderately Stable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total 3

0 1

0 8

7 9

7 6

2 6

7 6

15 10 11 0

0 0

1 3

8 4

5 4

9 4

11 7

1 0

0 0

1 5

5 8

11 10 13 3

2 1

0 0

0 7

3 2

0 10 18 25 19 22 17 30 20 27 33 22 19 0

Total 0

17 32 98 68 59 274 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 County Generating Station Period of Record: April - June 2008 Stability Class -

Extremely Stable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

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

4-7 8-12 13-18 19-24

> 24 Total 0

0 0

0 7

11 11 1

3 6

2 0

0 0

3 9

14 16 10 9

12 11 6

3 0

0 Total 0

3 5

20 22 43 93 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 County Generating Station Period of Record: July - September 2008 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 4

0 0

0 9

11 10 6

3 0

Total 0

5 29 17 3

0 54 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 County Generating Station Period of Record: July - September 2008 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 10 1

6 1

1 2

2 0

3 5

15 18 23 21 5

3 0

11 4

6 1

1 2

2 1

4 8

23 24 26 28 6

6 0

Total 0

23 116 14 0

0 153 Hours of calm in this stability class:

0 Hours of missing wind measurements in this s tability class:

0 11 stability classes:

Hours of missing stability measurements in al 0

LaSalle County Generating Station Period of Record: July -

Stability Class - Slightly Unstable Winds Measured at September 2008

- 200Ft-33Ft 33 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE 1-3 0

0 0

0 4-7 8-12 13-18 19-24

> 24 Total 7

16 8

2 1

0 3

1 2

4 5

5 7

8 6

2 5

3 7

8 S

SSW SW WSW W

0 0

1 0

0 2

1 2

0 4

4 4

2 0

5 0

0 0

0 1

0 0

6 5

8 6

0 0

23 0

13 0

8 13 4

10 6

26 6

17 9

0 13 0

13 0

25 0

19 0

36 0

25 0

11 0

31 0

10 WNW NW 2

9 NNW 7

19 Variable 0

0 0

0 Total 0

66 161 25 1

0 253 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 County Generating Station Period of Record: July -

September 2008 Stability Class - Neutral Winds Measured at Wind Speed Wind

- 200Ft-33Ft 33 Feet (in mph)

Delta-T (F)

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 33 33 22 23 20 12 24 28 10 10 16 12 15 17 8

13 0

17 7

32 32 17 12 18 18 24 7

29 11 15 12 16 20 0

54 42 60 62 40 25 44 46 35 22 50 33 32 38 30 36 0

Total 10 296 287 51 5

0 649 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 County Generating Station Period of Record: July -

Stability Class - Slightly Stable Winds Measured at September 2008 200Ft-33Ft 33 Feet Delta-T (F)

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 1

23 3

1 3

0 9

16 6

21 1

18 21 0

14 3

3 14 2

2 16 6

2 9

12 3

16 15 1

11 11 2

15 15 3

14 14 0

28 0

27 0

28 0

42 0

17 0

19 0

24 0

35 0

24 0

33 0

31 0

35 0

20 0

26 2

27 1

16 5

5 3

0 153 0

0 0

0 27 257 0

446 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:

0

LaSalle County Generating Station Period of Record: July - September 2008 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 4-7 8-12 13-18 19-24

> 24 Total 15 8

3 3

18 32 34 10 19 8

18 15 10 14 20 10 0

0 0

1 0

10 3

1 1

4 2

0 13 2

2 2

0 0

16 12 5

3 28 35 37 14 25 12 20 28 17 20 26 13 0

Total 32 237 41 1

0 0

311 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 County Generating Station Period of Record: July -

Stability Class -

Extremely Stable Winds Measured at Wind Speed Wind September 2008

- 200Ft-33Ft 33 Feet (in mph)

Delta-T (F)

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 0

0 5

53 29 18 22 36 53 23 24 15 3

2 0

0 0

0 1

0 11 5

18 4

0 0

40 5

2 1

0 5

57 29 19 24 47 58 43 28 16 4

3 0

Total 15 286 0

0 0

341 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 County Generating Station Period of Record: July - September 2008 Stability Class -

Extremely Unstable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total 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:

0

LaSalle County Generating Station Period of Record: July -

September 2008 Stability Class - Moderately Unstable

- 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

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 0

0 0

8-12 13-18 19-24

> 24 0

0 0

1 0

0 0

1 0

0 0

0 Total 0

0 0

0 1

0 0

1 0

1 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:

0

LaSalle County Generating Station Period of Record: July - September 2008 Stability Class - Slightly Unstable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

Wind Direction N

Wind Speed (in mph) 8-12 13-18 19-24 NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 1-3 0

0 0

0 4-7 0

0 0

0 4

0 0

1 4

1 0

0 0

0

> 24 Total 3

2 8

8 0

0 0

5 5

0 0

0 5

0 1

0 0

0 3

0 10 0

2 0

0 5

3 0

0 Variable Total 0

13 23 6

45 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 County Generating Station Period of Record: July -

September 2008 Stability Class - Neutral 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

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 16 11 17 14 7

10 22 14 10 2

7 10 7

13 4

9 0

8-12 13-18 19-24

> 24 34 22 5

2 31 14 4

0 22 31 16 0

18 24 8

1 13 13 0

0 18 4

0 0

14 11 3

0 18 11 0

0 19 27 5

0 14 11 12 4

28 33 19 5

34 22 8

1 53 28 4

2 32 17 7

3 21 32 13 0

32 25 4

0 0

0 Total 79 60 86 65 33 32 50 43 62 43 92 75 94 72 70 70 0

Total 1

173 401 325 108 18 1026 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:

0

LaSalle County Generating Station Period of Record: July - September 2008 Stability Class - Slightly Stable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 0

2 0

1 1

0 0

1 2

4 0

0 0

2 1

1 0

6 1

11 6

8 14 3

3 30 2

11 28 3

7 6

3 4

1 5

5 6

16 12 5

11 11 5

1 4

4 4

7 2

3 5

10 1

24 0

31 0

40 1

47 2

40 0

34 0

19 1

23 5

40 4

10 15 9

7 18 10 49 8

11 3

5 7

12 4

10 14 13 3

9 17 2

12 25 9

0 5

18 6

5 9

0 123 4

31 1

30 2

43 4

41 1

46 0

42 0

0 32 580 0

0 236 15 69 105 Hours of Hours of Hours of calm in missing missing this stability class:

wind measurements in this stability measurements in 1

stability class:

0 all stability classes:

0

LaSalle County Generating Station Period of Record: July -

September 2008 Stability Class - Moderately Stable

-. 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE 1-3 1

0 1

0 4-7 8-12 13-18 19-24

> 24 Total E

ESE SE SSE S

SSW SW WSW W

2 2

1 0

0 0

1 0

0 5

4 3

3 1

2 1

5 7

1 0

1 5

7 3

3 7

6 1

4 1

0 0

1 6

11 0

19 0

17 6

0 11 0

26 2

29 0

8 6

6 11 5

17 8

11 6

11 8

11 43 5

5 5

5 3

8 9

5 12 2

11 3

32 1

31 4

18 3

28 1

24 5

39 1

25 0

17 0

15 2

10 11 11 WNW NW NNW Variable Total 2

12 1

1 0

7 5

0 3

6 7

0 7

2 2

0 0

0 9

39 95 129 79 31 382 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 County Generating Station Period of Record: July - September 2008 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 4-7 8-12 13-18 19-24

> 24 Total 0

0 0

8 13 6

7 11 11 9

6 7

0 1

0 0

3 3

14 20 18 13 23 22 15 19 18 2

1 0

Total 0

2 20 37 79 33 171

.y class:

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

0 Hours of missing stability measurements in all stability classes:

0

LaSalle County Generating Station Period of Record: October -

December2008 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

0 2

2 6

0 10 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stabili Hours of missing stability measurements in all sta ty class:

16 bility classes:

4

LaSalle County Generating Station Period of Record: October -

December2008 Stability Class - Moderately Unstable 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

I Wind Direction N

NNE NE ENE E

ESE SE SSE 1-3 0

0 0

4-7 8-12 13-18 19-24

> 24 Total 0

0 0

1 5

0 0

1 1

1 S

SSW SW WSW W

WNW 0

0 0

1 6

0 1

0 9

2 9

0 NW 0

0 NNW Variable 0

Total 2

8 19 6

1 36 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

3 all stability classes:

4

LaSalle County Generating Station Period of Record: October Stability Class - Slightly Unstable Winds Measured at December2008

- 200Ft-33Ft 33 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

1-3 0

0 0

4-7 8-12 13-18 19-24

> 24 Total 3

2 0

0 0

1 4

7 2

0 0

2 0

0 0

10 0

0 0

0 4

0 0

0 1

2 1

5 5

11 0

18 WNW NW 0

0 0

0 1

0 0

0 1

1 0

0 2

3 1

8 1

4 0

0 3

3 0

0 1

0 3

0 8

3 13 1

0 0

0 3

7 Variable Total 0

2 17 41 3

71 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

3 all stability classes:

4

LaSalle County Generating Station Period of Record: October -

December2008 Stability Class - Neutral

- 200Ft-33Ft Winds Measured at 33 Feet Wind Speed (in mph)

Wind Delta-T (F)

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 22 10 13 16 5

2 5

3 3

12 4

8 10 10 6

15 0

30 5

5 13 16 19 15 9

27 25 30 18 21 58 29 45 0

365 24 0

0 13 8

25 17 5

13 31 12 22 22 66 37 72 0

1 0

0 0

0 7

0 1

9.

4 1

5 2

18 10 14 0

0 0

0 1

0 0

6 0

0 1

2 10 0

0 0

Total 77 16 18 43 29 54 37 18 58 72 47 55 58 162 82 146 0

Total 4

144 367 1

72 20 972 Hours of calm in this stability class:

Hours of missing wind measurements in this stability class:

59 Hours of missing stability measurements in all stability classes:

4

LaSalle County Generating Station Period of Record: October -

December2008 Stability Class - Slightly Stable Winds Measured at Wind Speed Wind

- 200Ft-33Ft 33 Feet (in mph)

Delta-T (F)

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 15 7

3 4

7 8

8 10 10 9

6 1

6 6

7 7

0 4

2 3

10 18 12 2

5 17 10 16 4

4 15 26 16 0

164 1

0 0

1 12 17 5

1 12 21 14 11 4

14 3

4 0

0 0

0 1

0 3

21 16 3

3 7

20 0

0 0

10 1

0 4

3 14 0

0 0

22 11 6

15 37 39 15 19 71 58 41 25 27 69 38 30 0

Total 19 114 120 74 32 523 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

28 Hours of missing stability measurements in all stability classes:

4

LaSalle County Generating Station Period of Record: October -

December2008 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 4-7 8-12 13-18 19-24

> 24 Total 9

1 1

1 10 6

9 14 7

3 1

4 2

18 2

2 0

0 0

0 2

16 8

2 6

10 18 11 4

14 8

0 0

0 10 1

1 4

27 16 11 24 23 26 18 8

25 30 2

2 0

Total 9

90 99 30 0

0 228 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

22 Hours of missing stability measurements in all stability classes:

4

LaSalle County Generating Station Period of Record: October Stability Class -

Extremely Stable Winds Measured at December2008 200Ft-33Ft 33 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

1-3 0

0 0

4-7 8-12 13-18 19-24

> 24 Total

.5 1

0 0

4 0

0 0

3 3

0 0

0 5

1 0

0 4

ESE SE SSE S

SSW SW WSW W

0 20 0

9 0

16 14 1

13 25 0

23 0

12 0

30 0

39 0

29 0

25 0

29 0

25 0

9 20 0

10 14 0

14 15 0

13 11 NW NNW Variable Total 0

0 0

0 6

0 1

0 0

0 106 0

0 0

0 7

0 1

121 0

230 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

2 Hours of missing stability measurements in all stability classes:

4

LaSalle County Generating Station Period of Record: October -

December2008 Stability Class -

Extremely Unstable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE 1-3 0

0 0

0 4-7 8-12 13-18 19-24

> 24 Total 0

0 0

SSE S

SSW SW WSW W

0 0

1 3

WNW NW NNW Variable Total 0

0 0

0 3

3 0

0 0

0 4

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 County Generating Station Period of Record: October -

December2008 Class - Moderately Unstable 375Ft-33Ft Winds Measured at 375 Feet Stability Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

1-3 0

0 0

0 4-7 8-12 13-18 19-24

> 24 Total 0

0 0

3 0

0 0

5 1

NNW Variable Total 0

0 0

0 4

2 0

0 0

0 7

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 County Generating Station Period of Record: October -

December2008 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 Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total Total 0

0 1

8 2

6 17 1

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:

4

LaSalle County Generating Station Period of Record: October -

December2008 Stability Class - Neutral

- 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 1

3 0

7 0

11 0

4 0

2 0

1 0

4 0

1 1

4 0

5 0

4 0

2 0

3 0

C Wind Speed (in mph) 8-12 13-18 19-24

> 24 Total 17 5

8 11 6

6 4

6 9

3 4

8 11 15 20 26 0

16 7

4 11 1

8 16 8

21 33 19 17 19 47 25 22 0

274 28 3

2 6

5 17 22 7

16 33 17 19 31 45 49 59 0

359 3

0 0

12 10 1

22 12 4

7 14 16 27 18 0

146 68 22 25 32 14 45 53 23 72 82 46 56 80 127 123 128 0

996 Total 3

55 159 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

172 all stability classes:

4

LaSalle County Generating Station Period of Record: October -

December2008 Stability Class -

Slightly Stable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

1-3 1

4-7 8-12 13-18 19-24

> 24 Total NNE NE ENE 0

0 0

E ESE SE 1

SSE 0

S 1

5 3

2 1

0 3

2 1

0 2

0 4

2 0

1 1

0 1

5 3

0 1

2 4

3 14 5

11 14 33 5

6 8

7 3

8 9

18 37 2

0 3

3 6

2 3

16 9

22 0

18 0

22 2

19 SSW 0

9 1

6 17 14 52 90 3

13 19 35 73 5

8 18 25 57 SW 1

1 WSW W

WNW NW NNW Variable Total 3

2 0

0 0

2 8

7 0

2 0

1 8

1 4

13 8

25 32 74 3

17 41 7

20 8

14 1

29 4

29 0

0 150 0

0 11 27 52 126 216 582 Hours of calm in this stability class:

0 Hours of missing wind measurements in this s Hours of missing stability measurements in a

tability class:

44 11 stability classes:

4

LaSalle County Generating Station Period of Record: October -

December2008 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) 1-3 4-7 8-12 13-18 19-24

> 24 Total 0

0 0

0 4

9 2

2 8

6 17 2

5 10 2

2 0

0 0

5 4

0 12 31 17 10 0

3 10 0

0 0

4 5

7 3

12 17 9

20 45 28 44 11 22 30 8

5 0

Total 1

7 33 68 69 92 270 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 County Generating Station Stability Period of Record: October -

December2008 Class - Extremely Stable

- 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE 1-3 0

0 0

4-7 8-12 13-18 19-24

> 24 Total 1

0 0

1 0

0 0

2 0

0 0

3 5

I 0

0 0

0 4

7 SSE S

SSW SW WSW 0

0 0

1 0

0 0

0 3

8 3

14 1

21 15 37 0

5 9

14 W

0 0

0 1

0 0

0 1

0 5

0 0

4 0

1 7

7 16 WTW 1

0 6

0 3

0 1

Variable 0

Total 1

3 10 6

42 48 110 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

RA09-031, Annual Radioactive Effluent Release Report

Text

Subject:

Attachment:

Navigation menu

RA09-031, Annual Radioactive Effluent Release Report

Text

Subject:

Attachment:

Navigation menu

Search