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Category:NPDES NONCOMPLIANCE NOTIFICATION
MONTHYEARML20206C9871999-04-27027 April 1999 NPDES Noncompliance Notification:On 990319,station Personnel Observed Foam Emanating from Manhole Vent Associated with Outfall 001,no Foam Was Observed on Any Waterway.Caused by Inappropriate Addition of Betz 3625 to Spray Pond ML20207D6171999-02-26026 February 1999 NPDES Noncompliance Notification:On 990111,discovered That Weelkly Analysis for non-oxidizing Biocide Betz 3625 Was Not Performed.Caused by Sample Being Inappropriately Delayed for Future Chemical Addition.Counseled Individuals Involved ML20202F0591999-01-19019 January 1999 NPDES Noncompliance Notification:On 990112,Auxiliary Boiler Source Number OAS502 Found to Have Malfunctioning Opacity Monitor.Caused by Stepdown Transformer within Power Supply. Power Supply Replaced ML20198J2811998-12-21021 December 1998 NPDES Noncompliance Notification:On 981102,release of 500 Gallons of 12% Sodium Hypochlorite to Environment Occurred. Caused by Failure of Tank Discharge Fittings.Integrity Testing Will Be Performed on All New Tanks.With ML20206R3491998-12-21021 December 1998 NPDES Noncompliance Notification:On 981102,500 Gallons of 12% Sodium Hypochlorite Released to Environ.Caused by Failure of Tank Discharge Fittings & Subsequent Leaks from Secondary Containment.Culvert Was Flushed Repeatedly ML20236V2001998-07-27027 July 1998 NPDES Noncompliance Notification:On 980619,geometric Mean Coliform Concentration Calculated to Be 223 Colonies Per 100 Ml.Sample Procedure Enhanced to Ensure Normal Operating Conditions ML20248C9461998-05-27027 May 1998 NPDES Noncompliance Notification:On 980414,total Iron Discharge Through Outfall 001 Exceeded Limits Set in Ltr Dtd 960508.Total Iron Discharge Limit Exceeded During Cleaning Evolution.Limit Revised ML20217N6921998-02-27027 February 1998 NPDES Noncompliance Notification:On 980107 Net Total Suspended Solids (TSS) for Units 1 & 2 Cooling Towers at Outfall 001 Exceeded NPDES Permit Daily Limit of 60 Ppm. Caused by Contaminated Sample Lines.Replaced Tygon Tubing ML20141G0271997-06-27027 June 1997 NPDES Noncompliance Notification:On 970512,sample for Kjeldahl Omitted Due to Personnel Error.Counseled Individual Responsible.On 970521,Net TSS Exceeded NPDES Daily Limit Due to Fouled Sample Tubing.Replaced Sample Tubing ML20137M5511997-03-27027 March 1997 NPDES Noncompliance Notification:On 970228,flow Integrator Used to Measure Spray Pond Effluent Flow Was Identified to Be Malfunctioning & Declared Inoperable Due to Lodged Debris.Revised Procedure for Spray Pond Effluent Flow ML20134G3241997-01-31031 January 1997 NPDES Noncompliance Notification:On 970108,util Informed NRC That PA Dept of Environ Protection Granted Approval for Temporary Discharge at Lgs,Per 961219 ML20138G9651996-12-24024 December 1996 NPDES Noncompliance Notification:On 960428,calibration of Flowmeter Used to Measure Spray Pond Flow Was Not Checked on Routine Basis Because Person Required to Develop Maint Was Unaware of Requirements.Installed New Meter ML20135A5851996-11-27027 November 1996 NPDES Noncompliance Notification:On July-Sept 1996 Re NPDES Limit for Fecal Coloform Concentration Not Met.Caused by Inadequate Gasket Installation.Ozonators Overhauled to Ensure Peak Performance ML20134E0641996-10-28028 October 1996 NPDES Noncompliance Notification:During Month of Sept 1996, NPDES Limit for Fecal Coliform Concentration at Discharge of Bradshaw Reservoir Pumps Was Not Met.Caused by Leaking Gaskets on Ozone Gas Diffusers.New Gaskets,Installed ML20129E5681996-09-27027 September 1996 NPDES Noncompliance Notification:On 960805,geometric Mean of Fecal Coliform Concentration Calculated to Be 641 Colonies Per 100 Ml.Cause Suspected to Be Due to Malfunctioning Ozone Disinfection Sys.Adjustments to Sys Have Been Made ML20129E5411996-09-26026 September 1996 NPDES Noncompliance Notification:On 960812,discharge Observed from Unit 2 Cooling Tower Overflow to Outfall 021. Caused by Personnel Error in Performing Required Analysis of Cooling Tower Overflow Sample.Individual Counseled ML20117G7071996-08-23023 August 1996 NPDES Noncompliance Notification:On 960715,geometric Mean of Fecal Coliform Concentration Exceeded NPDES Permit Limit. Caused by Leaking Seals on Ozone Diffusers.Temporary Adjustments Made to Ozone Gas Flow Balance ML20116B3851996-07-24024 July 1996 NPDES Noncompliance Notification:On 960602 Identified Ph Levels Exceeded NPDES Permit Limitations.Caused by Natural Biological activity.CO2 Injection Established,Maintained & Monitored Until 960612 ML20115G1151996-07-12012 July 1996 NPDES Noncompliance Notification:On 960619,resulting Net TSS Value 82.8 mg/1,exceeded Max Daily Limit of 60 Mg/L.Caused by Excessive Storm Water Runoff.Net TSS Revised ML20113C4451996-06-24024 June 1996 NPDES Noncompliance Notification:On 960318,flow Integrator Used to Measure Spray Pond Effluent Flow Declared Inoperable.Caused by Faulty Flow Integrator.Frequency of Use of Instrument Changed to Daily as Stated in Issue Number ML20108A3671996-04-28028 April 1996 NPDES Noncompliance Notification:On 960314,personnel Observed Sewage Overflowing from MH-07 & Into Storm Drain W-4.Caused by Blockage of Pipe Section Between MH-07 & MH-08.Sewer Contract Svc Pressure Cleaned ML20108A3801996-04-28028 April 1996 NPDES Noncompliance Notification:On 960223,identified Seven Issues of Administrative non-compliance/ambiguity W/Permits. Caused by Inadequate Administration.Individuals Gained Better Understanding W/Guidance ML20101K4661996-03-28028 March 1996 NPDES Noncompliance Notification:On 960218,discovered That No Records Existed for Bradshae Reservoir Discharge Water Temp for Listed Time Periods.Caused by Temporary Reassigment of Personnel.Review of Staffing in Progress ML20100P6311996-02-28028 February 1996 NPDES Noncompliance Notification:On 951108,discharge 001 Net TSS in Excess of Maximum Daily Limit.Caused by Flaw in Methodology to Calculate Net TSS concentration.Follow-up Composite Samples Taken ML20072R4601994-08-31031 August 1994 NPDES Noncompliance Notification:On 940708 & 0815,Discharge 001 Total Zinc Concentrations Exceeded Max Daily Limitations.Daily Zinc Trending Analysis Will Be Upgraded & Chemistry Technician Involved in 940815 Event Counselled ML20071L1761994-07-27027 July 1994 NPDES Noncompliance Notification:On 940609,zinc Analyses Indicated That Discharge 001 Total Zinc Levels in Excess of Max Daily Limitations in Both Cooling Towers.Daily Zinc Control Limits Will Be Administratively Maintained Lower ML20149E7291994-07-26026 July 1994 NPDES Discharge Monitoring Rept:On 940713,approx 18 Gallons of Betz Clamtrol CT-1 Inadvertently Released from Injection Sys Located South of LGS Spraypond Pumphouse.Caused by Break in Pump Discharge Line.Polyethylene Piping Replaced ML20065B9221994-03-25025 March 1994 NPDES Noncompliances Notification:On 940204,discharge 001 Maximum Daily Limit of 1.0 mg/1 Total Zinc Was Exceeded. Caused by Low Ph Transient in Unit 2 Cooling Tower Water Sys.Isolated Acid Injection Sys ML20064C7701994-02-25025 February 1994 NPDES Noncompliance Notification:On 940116 & 17 Manual Reactor Scram Occurred.Caused by Failure to Adequately Throttle Cooling Tower Bypass Valves.Procedure Revised ML20059C4941993-10-26026 October 1993 NPDES Noncompliance Notification:On 930907,cooling Tower Blowdown Water Discharged Into Possum Hollow Creek Due to Loss of Two of Four Operating Circulating Water Pumps. Procedures for Performing Excavations Revised ML20056G3921993-08-27027 August 1993 NPDES Noncompliance Notification:On 930710,13,14 & 25, Water Processing Facility (Wpf) Discharge Temp Exceeded Max Limitation of 74 Degrees F.Rev to NPDES Permit,Removing Temp Limits Approved & Wpf Chillers Removed from Svc ML20024H8441993-08-19019 August 1993 NPDES Noncompliance Notification Re Perkiomen Storage Tank Overflow to Possum Hollow Run.Application for Amend to Permit PA0051926 Submitted ML20046B8051993-07-29029 July 1993 NPDES Noncompliance Notification:On 930618,20 & 27,water Processing Facility Temp Exceeded Permitted Max Limitation of 74 Degrees F.Caused by Lack of Training & Written Instructions.Training Provided & Addl Instruction Issued ML20044G7641993-05-21021 May 1993 NPDES Noncompliance Notification:From 930417-18,equipment Problems Occurred Which Rendered Dissolved Oxygen & Ph Monitoring Instrumentation Inoperable.Caused by Debris in Sample Line.Methods for Filtering Flow Under Investigation ML20044C4051993-03-16016 March 1993 NPDES Noncompliance Notification:On 930222,discovered That Contractor Personnel Discharged Treated Water from Fire Hydrant Supplied by Unit 1 Cooling Tower Into Storm Water Drain E-3.2.Caused by Personnel Error.Label Applied ML20128N1251993-02-17017 February 1993 NPDES Noncompliance Notification:On 930103,cooling Tower Blowdown Water Overflowed from Discharge 001 Pipeline & Flowed Into Possum Hollow Creek.Caused by Failure to Throttle Unit 2 Bypass Valves.Procedure Changed ML20128A5071993-01-25025 January 1993 NPDES Noncompliance Notification:On 921117 & 25,analytical Results for inductively-coupled Plasma Analyzer at Discharge Point 001 Exceeded Zinc Concentration.Total Zinc Concentration Analysis Will Be Performed Onsite ML20126G9991992-12-24024 December 1992 NPDES Noncompliance Notification:On 921104,dissolved Oxygen Monitoring Equipment at Bradshaw Reservoir Discharge & Water Processing Facility Became Fouled by Organic Concentrations. Caused by Heavy Rainfall.Manual Samples Will Be Obtained ML20117A5761992-11-23023 November 1992 NPDES Noncompliance Notification:On 921013 & 14,four of Five Samples Collected from Discharge Point 001 Exceeded Daily Max Permit Limit of 1.0 Mg/L.Caused by Heavy Rains Across Southeastern PA on 921009.Injection Rates Decreased ML20101H5321992-06-26026 June 1992 NPDES Noncompliance Notification:On 920504,crack Discovered on Above Ground Cleanout for Sewage Line Leading from Plant Training Ctr to Plant Sewage Sys Holding Tanks.Caused by Expansion of Sewage Spill Line.Clamps Installed ML20095J1201992-04-23023 April 1992 NPDES Noncompliance Notification:On 920322,cooling Tower Blowdown Water Discharged Into Possum Hollow Creek.Caused by Procedure Deficiency.Sys Operating Procedure S09.4.A Expected to Be Revised by 920501 ML20141M0551992-03-25025 March 1992 NPDES Noncompliance Notification:On 920206,rain Water Pumped from Eletrical Manhole Into Storm Water Runoff Drain Due to Inadequate Procedural Guidance.Blue Drains to Be Labelled, Indicating Use for Storm Water Runoff Only by 920801 ML20091Q4301992-01-23023 January 1992 NPDES Noncompliance Notification:On 911218 Cooling Tower Blowdown Water Discharged to Possum Hollow Creek Resulting in Unpermitted Discharge Due to Failure to Identify & Revise All Appropriate Procedures.Procedure GP-3 to Be Revised ML20086E4981991-11-22022 November 1991 NPDES Noncompliance Notification:On 911016 Underground Fire Water Pipeline Inadvertently Punctured by Contractor Backhoe Ram During Excavation of Trench.Caused by Inadequate Review of Required Prints.Backhoe Ram Operator Terminated ML20082L9871991-08-28028 August 1991 NPDES Noncompliance Notification:On 910707 & 19,electrical Storm Caused Loss of Power to Bedminster Water Processing Facility & Tripped Chillers.On 910721,discharge Temp Exceeded Permitted Limits.Permit Limits Changed ML20217C2131991-07-0808 July 1991 NPDES Noncompliance Notification:On 910629,chillers at Bedminster Water Processing Facility for Bradshaw Reservoir Tripped Due to Unexpected Failure of Logic Control Unit. Chiller Control to Primary Computer Restored ML20077G5771991-06-20020 June 1991 NPDES Noncompliance Notification:On 910528,chiller C at Bedminster Water Processing Facility Tripped Due to High Vibration & Temp at Discharge 001 Exceeding Permitted Instantaneous Temp.Discharge Temp Setpoint Lowered ML20077D8701991-05-17017 May 1991 NPDES Noncompliance Notification:On 910512,cooling Tower Experienced Failure,Causing Large Vol of Cooling Tower Water to Bypass Normal Blowdown Discharge Pathway.Cooling Tower Will Be Inspected During mid-yr Outage ML20070S3071991-03-22022 March 1991 NPDES Noncompliance Notification:On 910204,discovered That Misalignment of Diverter Valve to Outfall 003 May Have Allowed Mixture of Storm Water & Steam Condensate to Be Released from Outfall.Valve Repositioned ML20065M6811990-11-29029 November 1990 NPDES Noncompliance Notification:On 901003,routine Weekly Discharge 001 Sample Exceeded Max Permit Limits for Grease & Oil.Sample Contained 43.7 Mg Per Liter of Oil & Grease. Abnormal Reading Believed to Be Caused by Oily Silt 1999-04-27
[Table view] Category:TEXT-ENVIRONMENTAL REPORTS
MONTHYEARML20206C9871999-04-27027 April 1999 NPDES Noncompliance Notification:On 990319,station Personnel Observed Foam Emanating from Manhole Vent Associated with Outfall 001,no Foam Was Observed on Any Waterway.Caused by Inappropriate Addition of Betz 3625 to Spray Pond ML20207D6171999-02-26026 February 1999 NPDES Noncompliance Notification:On 990111,discovered That Weelkly Analysis for non-oxidizing Biocide Betz 3625 Was Not Performed.Caused by Sample Being Inappropriately Delayed for Future Chemical Addition.Counseled Individuals Involved ML20202F0591999-01-19019 January 1999 NPDES Noncompliance Notification:On 990112,Auxiliary Boiler Source Number OAS502 Found to Have Malfunctioning Opacity Monitor.Caused by Stepdown Transformer within Power Supply. Power Supply Replaced ML20206E2161998-12-31031 December 1998 1998 Annual Environ Operating Rept (Non-Radiological) for Limerick Generating Station,Units 1 & 2 ML20205T0581998-12-31031 December 1998 Annual Radiological Environ Operating Rept 15 for 1998 ML20206R3491998-12-21021 December 1998 NPDES Noncompliance Notification:On 981102,500 Gallons of 12% Sodium Hypochlorite Released to Environ.Caused by Failure of Tank Discharge Fittings & Subsequent Leaks from Secondary Containment.Culvert Was Flushed Repeatedly ML20198J2811998-12-21021 December 1998 NPDES Noncompliance Notification:On 981102,release of 500 Gallons of 12% Sodium Hypochlorite to Environment Occurred. Caused by Failure of Tank Discharge Fittings.Integrity Testing Will Be Performed on All New Tanks.With ML20236V2001998-07-27027 July 1998 NPDES Noncompliance Notification:On 980619,geometric Mean Coliform Concentration Calculated to Be 223 Colonies Per 100 Ml.Sample Procedure Enhanced to Ensure Normal Operating Conditions ML20248C9461998-05-27027 May 1998 NPDES Noncompliance Notification:On 980414,total Iron Discharge Through Outfall 001 Exceeded Limits Set in Ltr Dtd 960508.Total Iron Discharge Limit Exceeded During Cleaning Evolution.Limit Revised ML20217N6921998-02-27027 February 1998 NPDES Noncompliance Notification:On 980107 Net Total Suspended Solids (TSS) for Units 1 & 2 Cooling Towers at Outfall 001 Exceeded NPDES Permit Daily Limit of 60 Ppm. Caused by Contaminated Sample Lines.Replaced Tygon Tubing ML20203H1911997-12-31031 December 1997 Annual Effluent Release Rept 23 for Jan-Dec 1997 ML20216F3371997-12-31031 December 1997 Annual Environmental Operating Rept (Non-Radiological) for 970101-1231 ML20203L5691997-12-31031 December 1997 Occupational Exposure Tabulation Rept for LGS Units 1 & 2 for 1997 ML20203H2201997-12-31031 December 1997 Tower 1 Joint Frequency Distributions of Wind Speed & Direction by Atmospheric Stability Class Rept 13 for 1997 ML20217P1941997-12-31031 December 1997 Annual Environ Operating Rept (Non-Radiological) for Jan-Dec 1997, for LGS Units 1 & 2 ML20217M6471997-12-31031 December 1997 Annual Radiological Environ Operating Rept 14,Jan-Dec 1997 for Limerick Generating Station,Units 1 & 2 ML20141G0271997-06-27027 June 1997 NPDES Noncompliance Notification:On 970512,sample for Kjeldahl Omitted Due to Personnel Error.Counseled Individual Responsible.On 970521,Net TSS Exceeded NPDES Daily Limit Due to Fouled Sample Tubing.Replaced Sample Tubing ML20137M5511997-03-27027 March 1997 NPDES Noncompliance Notification:On 970228,flow Integrator Used to Measure Spray Pond Effluent Flow Was Identified to Be Malfunctioning & Declared Inoperable Due to Lodged Debris.Revised Procedure for Spray Pond Effluent Flow ML20134G3241997-01-31031 January 1997 NPDES Noncompliance Notification:On 970108,util Informed NRC That PA Dept of Environ Protection Granted Approval for Temporary Discharge at Lgs,Per 961219 ML20135D0161996-12-31031 December 1996 Occupational Exposure Tabulation Rept for LGS Units 1 & 2 for 1996 ML20148B6671996-12-31031 December 1996 LGS Units 1 & 2 Annual Radiological Environ Operating Rept 13 for 960101-1231 ML20135C7691996-12-31031 December 1996 1996 Annual Effluent Release Rept No 22 ML20138J5291996-12-31031 December 1996 Annual Environ Operating Rept (Non-Radiological) for Jan- Dec 1996 ML20135C7731996-12-31031 December 1996 1996 Annual Tower No 1 Joint Frequency Distribution of Wind Speed & Direction by Atmospheric Stability Class Rept No 12 ML20138G9651996-12-24024 December 1996 NPDES Noncompliance Notification:On 960428,calibration of Flowmeter Used to Measure Spray Pond Flow Was Not Checked on Routine Basis Because Person Required to Develop Maint Was Unaware of Requirements.Installed New Meter ML20135A5851996-11-27027 November 1996 NPDES Noncompliance Notification:On July-Sept 1996 Re NPDES Limit for Fecal Coloform Concentration Not Met.Caused by Inadequate Gasket Installation.Ozonators Overhauled to Ensure Peak Performance ML20134E0641996-10-28028 October 1996 NPDES Noncompliance Notification:During Month of Sept 1996, NPDES Limit for Fecal Coliform Concentration at Discharge of Bradshaw Reservoir Pumps Was Not Met.Caused by Leaking Gaskets on Ozone Gas Diffusers.New Gaskets,Installed ML20129E5681996-09-27027 September 1996 NPDES Noncompliance Notification:On 960805,geometric Mean of Fecal Coliform Concentration Calculated to Be 641 Colonies Per 100 Ml.Cause Suspected to Be Due to Malfunctioning Ozone Disinfection Sys.Adjustments to Sys Have Been Made ML20129E5411996-09-26026 September 1996 NPDES Noncompliance Notification:On 960812,discharge Observed from Unit 2 Cooling Tower Overflow to Outfall 021. Caused by Personnel Error in Performing Required Analysis of Cooling Tower Overflow Sample.Individual Counseled ML20117G7071996-08-23023 August 1996 NPDES Noncompliance Notification:On 960715,geometric Mean of Fecal Coliform Concentration Exceeded NPDES Permit Limit. Caused by Leaking Seals on Ozone Diffusers.Temporary Adjustments Made to Ozone Gas Flow Balance ML20116B3851996-07-24024 July 1996 NPDES Noncompliance Notification:On 960602 Identified Ph Levels Exceeded NPDES Permit Limitations.Caused by Natural Biological activity.CO2 Injection Established,Maintained & Monitored Until 960612 ML20115G1151996-07-12012 July 1996 NPDES Noncompliance Notification:On 960619,resulting Net TSS Value 82.8 mg/1,exceeded Max Daily Limit of 60 Mg/L.Caused by Excessive Storm Water Runoff.Net TSS Revised ML20113C4451996-06-24024 June 1996 NPDES Noncompliance Notification:On 960318,flow Integrator Used to Measure Spray Pond Effluent Flow Declared Inoperable.Caused by Faulty Flow Integrator.Frequency of Use of Instrument Changed to Daily as Stated in Issue Number ML20108A3801996-04-28028 April 1996 NPDES Noncompliance Notification:On 960223,identified Seven Issues of Administrative non-compliance/ambiguity W/Permits. Caused by Inadequate Administration.Individuals Gained Better Understanding W/Guidance ML20108A3671996-04-28028 April 1996 NPDES Noncompliance Notification:On 960314,personnel Observed Sewage Overflowing from MH-07 & Into Storm Drain W-4.Caused by Blockage of Pipe Section Between MH-07 & MH-08.Sewer Contract Svc Pressure Cleaned ML20101K4661996-03-28028 March 1996 NPDES Noncompliance Notification:On 960218,discovered That No Records Existed for Bradshae Reservoir Discharge Water Temp for Listed Time Periods.Caused by Temporary Reassigment of Personnel.Review of Staffing in Progress ML20100P6311996-02-28028 February 1996 NPDES Noncompliance Notification:On 951108,discharge 001 Net TSS in Excess of Maximum Daily Limit.Caused by Flaw in Methodology to Calculate Net TSS concentration.Follow-up Composite Samples Taken ML20108C9281995-12-31031 December 1995 LGS Units 1 & 2 1995 Annual Environ Operating Rept (Non- Radiological) Jan-Dec 1995 ML20100L8861995-12-31031 December 1995 Annual Effluent Release Rept 21,Jan-Dec 1995 ML20108B7391995-12-31031 December 1995 Annual Radiological Environ Operating Rept 12 Jan-Dec 1995 ML20100L8961995-12-31031 December 1995 Tower 1 Joint Frequency Distributions of Wind Speed & Direction by Atmospheric Stability Class 1995 Rept 11 ML20080N1061994-12-31031 December 1994 Annual Effluent Release Rept 20 Jan-Dec 1994 PECO Energy LGS Units 1 & 2 ML20082N5061994-12-31031 December 1994 Annual Environ Operating Rept ML20087H7231994-12-31031 December 1994 Annual Radiological Environ Operating Rept 11 for Jan-Dec 1994 ML20080N1121994-12-31031 December 1994 Tower 1 Joint Frequency Distributions of Wind Speed & Direction by Atmospheric Stability Class 1994 Rept 10 ML20072R4601994-08-31031 August 1994 NPDES Noncompliance Notification:On 940708 & 0815,Discharge 001 Total Zinc Concentrations Exceeded Max Daily Limitations.Daily Zinc Trending Analysis Will Be Upgraded & Chemistry Technician Involved in 940815 Event Counselled ML20071L1761994-07-27027 July 1994 NPDES Noncompliance Notification:On 940609,zinc Analyses Indicated That Discharge 001 Total Zinc Levels in Excess of Max Daily Limitations in Both Cooling Towers.Daily Zinc Control Limits Will Be Administratively Maintained Lower ML20149E7291994-07-26026 July 1994 NPDES Discharge Monitoring Rept:On 940713,approx 18 Gallons of Betz Clamtrol CT-1 Inadvertently Released from Injection Sys Located South of LGS Spraypond Pumphouse.Caused by Break in Pump Discharge Line.Polyethylene Piping Replaced ML20065B9221994-03-25025 March 1994 NPDES Noncompliances Notification:On 940204,discharge 001 Maximum Daily Limit of 1.0 mg/1 Total Zinc Was Exceeded. Caused by Low Ph Transient in Unit 2 Cooling Tower Water Sys.Isolated Acid Injection Sys ML20064C7701994-02-25025 February 1994 NPDES Noncompliance Notification:On 940116 & 17 Manual Reactor Scram Occurred.Caused by Failure to Adequately Throttle Cooling Tower Bypass Valves.Procedure Revised 1999-04-27
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Text
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D PHILADELPHIA ELECTRIC cot 4PANY .
1.t h40HCK Gt'NER ATJNG S T ATION l' P. P 80X A .
S AfinTOG A. PEN,19 YLV ANI A l'sd64 (215) 327 8200 mit, tonn L OOEMIN A, M,
...,. Z '.Tt/.E "...' " January 23, 1992 :
o Is Y
Mr. Robert Bader ,
l
.Dep1trtment of InC.ronmental Redources h[
~ Bureau of Water Quality Management 1875 New Uopa Street .-'
Norcistown, PA 19401 n
1
Subject:
Noncorpilance with NPDES PorMt No. ?A-00$1926, l-Limrtrick Gen 2 rating Station; Coullng Tower Blowdown M i
' Hannole Overflow to Possum Hollow Creek
Dear Mr,
Bauer DP. SCRIPT 70N OF TPE L' VENT fr On December .8,1991, a noncompliance of the NPDES permxt for the E
Limerick Geaorat.ing Station occurred then cooling tower blowdown -
wate; van discharged to Posttu:n Hollow Creek maulting in an '
unpumitted discharge. . .
Cn December 18, 1931, at 1950 hours0.0226 days <br />0.542 hours <br />0.00322 weeks <br />7.41975e-4 months <br />,-a Unit .1 shutdown vos i n.i t ia ted . ' Operations personnel tegan making preparatior.s for }
cold weather coerations of the Unit 1 cooling tower by p1heing the y coolism tour.t in the " Winter Bypass Mode." System procedure 'i S09.0.B, " Cold Weather Oceration of the coolints toser," ma used -
to Lredirect cooling watter f rom tae tower raceway directly to the 1
-tower basin,. Tulu aligrmont in required to prevent the build up '
l
-of danaging ice because or reduced heatic+.d as a result af a Unit shutdoan. 71 11, change in operating mode prevents tne evaporation-J oss of water normally exoerienced in standard cooling tower
{
y operation. The eiisi.natico of time evapcaative loss of water along with a evoling toutr basin makeup flow xate cet for full power -
operaticn reaulted ,i.n an increase in *.be Uait 1 cooling tower b, win water Am'el and an increace in blowdown flow rate.- This li additior.ai flow, cerabined with blowdown f rom the Unit 2 ccoling i tower, it. creased the total coaling tower blcadown rate to above j the discharge pipir.g capaci'y. g Altapproximately'!130_Souro,nainterancepersonnelobservedwater j werf..oaing thtough a vented manhole, upstream of the no rmal \- i dicenar,3e point (001) for the cooling tower blowdown. Maintenar.ce j p9raonnel immediately nutified Malu Control Doom cporations )
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1 l '~ _ personnel ofLthla conditic'.. Whp operations-personnel arri Wd to 1
, R T Investigater the-water dinnharge had stopped. The ecoling tower
, Jbloudown~ water that .overflowei f rc.n the VeM.ad manhole entered the ;
L Possum Hollow Cr en.t roughly 100 yards upstroom l' rom the SchuyM11 j River. An catin ted 125,000 gallons of water was discharged to
(# '
-Possum Hollow Creek before ths water level _ .in the Uni t.1 con ing_
% tfser basin Sas retu.*ned to _ a narre) level. Che.uistry personnel reviewed chemistry analyticar dat s f or: December . lu, D91, and ,
9 i t fetermived .that- no NPDES: Petmit limitaffor outfall 001 were itxceeded._ ~ Since the overflow water was ropresentative of the Z[
C w, diacharge : flos going: to Citf all_00), it wan concluded that this discharge-to Possum Hollow Creek also did not exceed any of-our
- permit,1. Nits.
- - the discharg7 ended-at or befort 2220 hours0.0257 days <br />0.617 hours <br />0.00367 weeks <br />8.4471e-4 months <br /> with a
- m iduration of % pproximately:pne-hour. Sirme the- discharge us very
- close to wheru Possuw 11ollo9 'Crbek enters the Schuylkill River, '
Anen : was no enviroreental damage % tved to be caused-by the ;
e Loverflov conditi6n< Therefore, tne enviroamen'.a1 impact ot this M ,
,unpormitted_ discharge ucn. determined to be minimal.
S :CM15E ' OP: Tile ' E'/ENT - i Z
P
' 'The cause of this event was inadequate couec eve attions--(1 e.,
f ailure _to iderrtify and revise all- appropriate procedtues) p' , ! implemented:for- a ~ previons 'similar cccurrence reported on December gm 7', a9892: In - bothL this :evknt; att the pr f or = eveat, the causo was fl ;dw cesuk of #eficient proceduren thct provided less than f' - Q _ adequate gui.dande for responding to a reduced rooling tour makeup
, water demand during planned unit sh..tdowns, coinc.1ent with :the l if need to enter-ccid Westher cooling tower cperation. Following the priot ;cver.Gow events System picc ) dure SO9.0.B vaa revised to-l cautiCn: oprations penonnel tAna!ntain the total -blowdown flow :
? ace of. both cc'.Gingitowers - below - 10,000 gpm._ However, in ,
F
- prepa(ation'for a5 planned unit shuJoun, advanced operater_ actions ar e necessary .to ;rnduce the. cooling towerrbasin level to a W minimum,j prior La implementation of. syst s procedure -SO9.0;B. -l f Therefor e, Jproc9du re -GP-3 /- "Nural Pl ant Shutdow9 t,hould have W been gevle.f to instruct operations personnet on the actions R4 'necesary to by taken prior .to initiating. 'a plannsd. shutdown d '
faring cold'wedtherroperation ensuring-trat'the Sotal coolsng 7 tO togr blowdown ' flow rate of 10,000 gpm Dist not e):ccedtd.
M '
S Additlonally, (potential derign defi':lency etir.s in that durihg1
~
0 y c andrMnuned. unit snutdown, operations c.fr.sonnel would not de able ' s y to?ru pond quick)y enough to reduce cooling townr~maPeup f1 x and
-preventa n overflow condition to occur while in cold weatner ;
Ml 3 operc ion .
d, p 7 4 +,
s[ ' dMNINTJd3 CF. NIJRE OCCdHRENCES.
. Procedure GP-3 ls expectvi-to be revisod by hbruary .L3,
~
, oL 1992, pm n Tl-is tevision will provlh procedura1 guidance t.) operations FL versonnel .for redac wg coolit.g. tower makeup flow dur)ng -
,,,y' planned: unit shutdowns in preparution for the reduced water dorwod. - 'Ih ii1 procedure revluion 9111 also inelude a step for' .
f 1 ll cl I
s uu . ,
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Page 3 l
use.during periods of cold weather which requires realigning the'aoprepriate cooling tower _to the winter bypass 1100.
l= o A review of' the coolli 13 tower level makeup system will bo ;
--enaducted by_ April 30, 1992. This review will determine if a l modification of the cooling-tower level makeup system decir,;n l is requ! red or whether a change in operational work practrees :
" or proceduren can be made to ensure that this evet.ilow '
condition can be avoided during an unplanned unit rhutdown.
20
{>
M /Q. t._s WGS:cah ,
l cc: U.S. Nuclear Regulatory-Commission Document Control Desk Docket Noo.-50-352/50-353 Washin@on, D.C. 20555
'7 T. T, Martin D Administrator, Region I, USNRC >
DocketiNos. 50-352/50-353 e
T. J._ Kenny USNRC Senior Hen! dent Tnspector, LGG p . Docket Non. 50-352/50-7 3 ,
i I Program' Management Sectiva (3WMS2)
L Permits 2nforcement Branch +
!. Wa ttir: Mnags.nent Div j sion -l l . Envi rot: mental - Prot ec* :.on1 Agency
~
- hter. Pe rmits - Seet 'on Begloa-III ~
a l 8 41 '.Che9 t nu t 11u!1 ding _
l.L . Philadelphia, PAz19107
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