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Category:Letter type:ULNRC
MONTHYEARULNRC-06853, Submittal of 2023 Fitness for Duty Performance Data Per Per 10 CFR 26.7172024-01-29029 January 2024 Submittal of 2023 Fitness for Duty Performance Data Per Per 10 CFR 26.717 ULNRC-06847, Supplement to Relief Request from Requirements of ASME BPV Code, Section XI, Subsection Iwl Regarding Examination and Testing of the Unbonded Post-Tensioning System (Relief Request C3R-01)2023-12-21021 December 2023 Supplement to Relief Request from Requirements of ASME BPV Code, Section XI, Subsection Iwl Regarding Examination and Testing of the Unbonded Post-Tensioning System (Relief Request C3R-01) ULNRC-06849, License Renewal Resolution for Commitments 34 and 35 Perform Evaluation of Crack Initiation and Propagation in Steam Generator Divider Plate and Tube-To-Tubesheet Welds2023-12-20020 December 2023 License Renewal Resolution for Commitments 34 and 35 Perform Evaluation of Crack Initiation and Propagation in Steam Generator Divider Plate and Tube-To-Tubesheet Welds ULNRC-06844, Request for Exemption from Specific Requirements in 2023 Security Rule, Enhanced Weapons, Firearms Background Checks, and Security Event Notification2023-12-0707 December 2023 Request for Exemption from Specific Requirements in 2023 Security Rule, Enhanced Weapons, Firearms Background Checks, and Security Event Notification ULNRC-06827, Supplement to License Amendment Request Regarding Support System Requirements for Residual Heat Removal and Control Room Air Conditioning Systems Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029)2023-11-20020 November 2023 Supplement to License Amendment Request Regarding Support System Requirements for Residual Heat Removal and Control Room Air Conditioning Systems Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029) ULNRC-06824, Response to Request for Additional Information Regarding Operating Quality Assurance Manual (Oqam) Revision 36A2023-08-17017 August 2023 Response to Request for Additional Information Regarding Operating Quality Assurance Manual (Oqam) Revision 36A ULNRC-06830, Transmittal of Updated Technical Specification Markup and Clean Pages for License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak2023-08-15015 August 2023 Transmittal of Updated Technical Specification Markup and Clean Pages for License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak ULNRC-06223, Minor Correction to License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Test Frequencies (LDCN 2020-0004)2023-07-25025 July 2023 Minor Correction to License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Test Frequencies (LDCN 2020-0004) ULNRC-06799, Submittal of Licensee Event Report 2022-003-01, Class 1E Electrical Air Conditioning System Thermal Expansion Valve Failure Resulted in Condition Prohibited by Technical Specifications2023-07-13013 July 2023 Submittal of Licensee Event Report 2022-003-01, Class 1E Electrical Air Conditioning System Thermal Expansion Valve Failure Resulted in Condition Prohibited by Technical Specifications ULNRC-06821, Post-Audit Follow-Up Information in Support of Callaway'S License Amendment Request and Proposed Exemption to Allow Use of Framatome Gaia Fuel (LDCN 22-0002) (EPID L-2022-LLA-0150 and EPID L-2022-LLE-00301)2023-06-21021 June 2023 Post-Audit Follow-Up Information in Support of Callaway'S License Amendment Request and Proposed Exemption to Allow Use of Framatome Gaia Fuel (LDCN 22-0002) (EPID L-2022-LLA-0150 and EPID L-2022-LLE-00301) ULNRC-06822, Additional Information Regarding Request for NRC Approval of Operating Quality Assurance Manual (Oqam) Revision 36a2023-06-14014 June 2023 Additional Information Regarding Request for NRC Approval of Operating Quality Assurance Manual (Oqam) Revision 36a ULNRC-06815, Request for NRC Approval of Operating Quality Assurance Manual, Revision 36a2023-06-0505 June 2023 Request for NRC Approval of Operating Quality Assurance Manual, Revision 36a ULNRC-06818, Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate .2023-06-0505 June 2023 Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate . ULNRC-06816, Withdrawal of Previously Submitted Enclosures Regarding License Amendment Request for Adoption of Alternative Source Term and Revision of Technical Specifications (LDCN 21-0015)2023-05-0909 May 2023 Withdrawal of Previously Submitted Enclosures Regarding License Amendment Request for Adoption of Alternative Source Term and Revision of Technical Specifications (LDCN 21-0015) ULNRC-06812, Submittal of 2022 Annual Radiological Environmental Operating Report2023-04-27027 April 2023 Submittal of 2022 Annual Radiological Environmental Operating Report ULNRC-06806, Submittal of Radiological Emergency Response Plan, Revision 552023-04-12012 April 2023 Submittal of Radiological Emergency Response Plan, Revision 55 ULNRC-06807, Submittal of Single Positive Test Forms2023-04-0303 April 2023 Submittal of Single Positive Test Forms ULNRC-06798, Submittal of Status of Plant Decommissioning Funding and ISFSI Decommissioning Funding Plan2023-03-30030 March 2023 Submittal of Status of Plant Decommissioning Funding and ISFSI Decommissioning Funding Plan ULNRC-06801, CFR 50.46 Annual Report Regarding ECCS Evaluation Model Revisions2023-03-30030 March 2023 CFR 50.46 Annual Report Regarding ECCS Evaluation Model Revisions ULNRC-06804, Submittal of Nuclear Property Insurance Reporting2023-03-29029 March 2023 Submittal of Nuclear Property Insurance Reporting ULNRC-06751, Application to Revise Technical Specifications to Adopt TSTF-501-A, Rev. 1, Relocate Stored Oil & Lube Oil Volume Values to Licensee Control2023-03-29029 March 2023 Application to Revise Technical Specifications to Adopt TSTF-501-A, Rev. 1, Relocate Stored Oil & Lube Oil Volume Values to Licensee Control ULNRC-06803, Submittal of Response to Request for Additional Information Regarding Results of Steam Generator Tube In-Service Inspection2023-03-29029 March 2023 Submittal of Response to Request for Additional Information Regarding Results of Steam Generator Tube In-Service Inspection ULNRC-06805, Transmittal of Special Report 2023-02 Non-Functionality of Containment Hydrogen Analyzer Channel for Greater than 30 Days2023-03-21021 March 2023 Transmittal of Special Report 2023-02 Non-Functionality of Containment Hydrogen Analyzer Channel for Greater than 30 Days ULNRC-06802, Special Report 2023-01 (PAM Report); Non-Functionality of a Post-Accident Monitoring Instrument2023-03-0909 March 2023 Special Report 2023-01 (PAM Report); Non-Functionality of a Post-Accident Monitoring Instrument ULNRC-06795, Submittal of Fitness for Duty Reports for 2022, Including Single Positive Test Forms2023-01-24024 January 2023 Submittal of Fitness for Duty Reports for 2022, Including Single Positive Test Forms ULNRC-06794, Submittal of Fitness for Duty Program Data for 20222023-01-24024 January 2023 Submittal of Fitness for Duty Program Data for 2022 ULNRC-06787, Response to Request for Additional Information Regarding License Amendment Request for Adoption of Alternate Source Term and Revision of Technical Specifications (LDCN 21-0015)2022-12-0808 December 2022 Response to Request for Additional Information Regarding License Amendment Request for Adoption of Alternate Source Term and Revision of Technical Specifications (LDCN 21-0015) ULNRC-06781, License Amendment Request to Clarify Support System Requirements for the Residual Heat Removal System and Control Room Air Conditioning System Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029)2022-12-0101 December 2022 License Amendment Request to Clarify Support System Requirements for the Residual Heat Removal System and Control Room Air Conditioning System Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029) ULNRC-06780, Additional Supplement to License Amendment Request to Adopt TSTF-439 and TSTF-505, LDCN 20-0072022-11-30030 November 2022 Additional Supplement to License Amendment Request to Adopt TSTF-439 and TSTF-505, LDCN 20-007 ULNRC-06772, 10 CFR 50.59 and 10 CFR 72.48 Summary Report2022-11-23023 November 2022 10 CFR 50.59 and 10 CFR 72.48 Summary Report ULNRC-06777, Operating Quality Assurance Manual (Oqam) Revision 362022-11-16016 November 2022 Operating Quality Assurance Manual (Oqam) Revision 36 ULNRC-06779, ULNRC-06779: Contesting of Green NCV 05000483/2022010-03, Failure to Perform Required Inservice Testing of Residual Heat Removal Heat Exchanger Pneumatically (Air) Operated Outlet and Bypass Valves2022-11-14014 November 2022 ULNRC-06779: Contesting of Green NCV 05000483/2022010-03, Failure to Perform Required Inservice Testing of Residual Heat Removal Heat Exchanger Pneumatically (Air) Operated Outlet and Bypass Valves ULNRC-06765, License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Testing Frequencies (LDCN 2020-0004)2022-11-0303 November 2022 License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Testing Frequencies (LDCN 2020-0004) ULNRC-06773, Results of Steam Generator Tube In-Service Inspection2022-11-0101 November 2022 Results of Steam Generator Tube In-Service Inspection ULNRC-06775, Submittal of Non-Functionality of Loose-Part Detection System Channel for Greater than 30 Days2022-10-27027 October 2022 Submittal of Non-Functionality of Loose-Part Detection System Channel for Greater than 30 Days ULNRC-06771, Correction to Application to Revise Technical Specifications to Adopt TSTF 577, Revised Frequencies for Steam Generator Tube Inspections (LDCN 21-0013)2022-10-25025 October 2022 Correction to Application to Revise Technical Specifications to Adopt TSTF 577, Revised Frequencies for Steam Generator Tube Inspections (LDCN 21-0013) ULNRC-06770, Cycle 25 Commitment Change Summary Report2022-10-19019 October 2022 Cycle 25 Commitment Change Summary Report ULNRC-06766, Correction of Text Contained in Enclosures Provided with Supplements to Request for License Amendment and Regulatory Exemptions for a Risk-Informed Approach to Address GSI-191 and Respond to GL 2004-02 (LDCN 19-0014)2022-09-0808 September 2022 Correction of Text Contained in Enclosures Provided with Supplements to Request for License Amendment and Regulatory Exemptions for a Risk-Informed Approach to Address GSI-191 and Respond to GL 2004-02 (LDCN 19-0014) ULNRC-06767, Presentation Information for Pre-Application Meeting Regarding New License Amendment Request for Use of Framatome Fuel Assemblies2022-09-0606 September 2022 Presentation Information for Pre-Application Meeting Regarding New License Amendment Request for Use of Framatome Fuel Assemblies ULNRC-06764, Revised Response to Request for Additional Information Regarding License Amendment Request for Adoption Off Alternate Source Term and Revision of Technical Specifications (LDCN 21-0015)2022-09-0101 September 2022 Revised Response to Request for Additional Information Regarding License Amendment Request for Adoption Off Alternate Source Term and Revision of Technical Specifications (LDCN 21-0015) ULNRC-06763, Supplement to Application to Revise Technical Specifications to Adopt TSTF 577, Revised Frequencies for Steam Generator Tube Inspection (LDCN 21-0013)2022-09-0101 September 2022 Supplement to Application to Revise Technical Specifications to Adopt TSTF 577, Revised Frequencies for Steam Generator Tube Inspection (LDCN 21-0013) ULNRC-06762, Submittal of Owner'S Activity Reports (OAR-1 Forms) for Cycle/Refuel 252022-08-25025 August 2022 Submittal of Owner'S Activity Reports (OAR-1 Forms) for Cycle/Refuel 25 ULNRC-06758, Union Electric Co. - Renewed Facility Operating License NPF-30, Withdrawal of License Amendment Request and Exemption Request Regarding Transition to Framatome Fuel (LDCN 22-0002)2022-08-0404 August 2022 Union Electric Co. - Renewed Facility Operating License NPF-30, Withdrawal of License Amendment Request and Exemption Request Regarding Transition to Framatome Fuel (LDCN 22-0002) ULNRC-06755, Response to Requests for Additional Information for Proposed Revision to Radiological Emergency Response Plan Regarding Response and Notification Goals2022-07-13013 July 2022 Response to Requests for Additional Information for Proposed Revision to Radiological Emergency Response Plan Regarding Response and Notification Goals ULNRC-06754, Response to Request for Additional Information Regarding Licensee Amendment Request for Adoption of Alternate Source Term and Revision of Technical Specifications2022-07-0505 July 2022 Response to Request for Additional Information Regarding Licensee Amendment Request for Adoption of Alternate Source Term and Revision of Technical Specifications ULNRC-06739, Post-Audit Supplement to License Amendment Request to Adopt TSTF-439 and TSTF-505 (LDCN 20-0007)2022-06-30030 June 2022 Post-Audit Supplement to License Amendment Request to Adopt TSTF-439 and TSTF-505 (LDCN 20-0007) ULNRC-06752, Evacuation Time Estimates Report2022-06-27027 June 2022 Evacuation Time Estimates Report ULNRC-06753, Presentation Information for Pre-Submittal Meeting Regarding Updated Spent Fuel Criticality Safety Analysis2022-06-23023 June 2022 Presentation Information for Pre-Submittal Meeting Regarding Updated Spent Fuel Criticality Safety Analysis ULNRC-06750, Submittal of Cycle 26 Core Operating Limits Report (COLR)2022-06-13013 June 2022 Submittal of Cycle 26 Core Operating Limits Report (COLR) ULNRC-06735, Response to Request for Additional Information Regarding Request for License Amendment and Regulatory Exemptions for Risk-Informed Approach to Address GSI-191 and Respond to Generic Letter 2004-02 (LDCN 19-0014).2022-05-27027 May 2022 Response to Request for Additional Information Regarding Request for License Amendment and Regulatory Exemptions for Risk-Informed Approach to Address GSI-191 and Respond to Generic Letter 2004-02 (LDCN 19-0014). 2024-01-29
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Union Electric PO Box 620 Callaway Plant Fulton, MO 65251 October 25, 2002 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Stop P1-137 Washington, DC 20555-0001 ULNRC-04765 ZAmeren DOCKET NUMBER 50-483 U1E CALLAWAY PLANT UNIT 1 UNION ELECTRIC CO.
FACILITY OPERATING LICENSE NPF-30 Operating License Appendix B Report Unanticipated Cooling Tower Basin pH Excursion The enclosed follow-up written reports are submitted in accordance with Operating License NPF-30, Appendix B, Section 5.4.2 to provide the NRC with copies of required written reports submitted to other Federal, State and Local agencies.
On October 10, 2002, Callaway Plant experienced an unanticipated pH excursion in the Cooling Tower Basin, which resulted in a violation of NPDES Permit No:
MO-0098001. The event required telephone notification of offsite agencies, including the NRC (EN#39274), and written follow-up reports.
The enclosed letters dated October 17, 2002, and addressed to Ms. Kristine Ricketts, Missouri Department of Natural Resources and Mr. Ed Galbrath, Missouri Department of Natural Resources constitute the required NPDES Permit Exception Report and 40CFR355 written follow-up report, respectively.
Please contact Mr. Mark A. Reidmeyer, Regional Regulatory Affairs Supervisor at (573)676-4306, if you have any questions.
Warren A. Witt Manager, Callaway Plant WAW/JWH/slk
Enclosure:
- 1) Letter to Ms. Kristine Ricketts dated 10/17/2002
- 2) Letter to Mr. Ed Galbrath dated 10/17/2002 "pco a subsidiaryofAmeren Corporation
ULNRC-04765 October 25, 2002 Page 2 cc: Mr. Ellis W. Merschoff Regional Administrator U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-4005 Senior Resident Inspector Callaway Resident Office U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman, MO 65077 Mr. Jack N. Donohew (2 copies)
Licensing Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 7El Washington, DC 20555-2738 Manager, Electric Department Missouri Public Service Commission PO Box 360 Jefferson City, MO 65102 Mr. John H. ONeill, Jr.
Shaw Pittman 2300 N. Street N.W.
Washington, DC 20037 Records Center Institute of Nuclear Power Operations 700 Galleria Parkway Atlanta, GA 30339
Ameren Services One Ameren Plaza Environmental,Safety A Health 1901 Chouteau Avenue 314.554.3652 (Phone) PO Box 66149 314.554.4182 (Facsimile) St. Louis. MO 63166-6149 mjbolllnger@ameren.com 314 621.3222 October 17, 2002 Ms. Kristine Ricketts Missouri Department of Natural Resources Jefferson City Regional Office 210 Hoover Drive P.O. Box 176 Jefferson City, MO 65102-0176
Dear.Ms. Ricketts:
Re: AmerenUE Callaway Power Plant - Callaway County NPDES Permit MO-0098001 Since early Friday morning, on October 11, the Callaway Plant staff has been responding to an upset to the plant's cooling water chemical control system, which resulted in violations of pH and copper limitations. The attached NPDES Permit Event Report provides the essential details regarding the excursion. This letter provides additional details including a basic chronology of events and the considerable efforts undertaken to mitigate potential impacts. Please note that aspects of the event have previously been reported to the DNR's Emergency Response Center. At this time, effluent from the cooling tower blowdown outfall
(#002) is once again in full compliance with permitted limitations.
Event Chronology Sometime on the afternoon of Thursday, October 10, a sulfuric acid.feed system failed, resulting in excessive addition of acid into the cooling tower basin. Based on the continuous monitoring data recorder, the pH first dropped below the 6.0 limit at 4:23 PM Thursday. Unfortunately, this condition was not discovered until 12:45 AM Friday morning when a worker read the continuous monitor display. A grab sample was taken and when the low pH (3.01 s.u.) was confirmed the cooling tower blowdown (CTB) discharge was terminated.
Staff were concerned that the low pH may have affected other parameters and thus a sample was taken for metals analysis, however the total recoverable analysis requires approximately eight hours to run. Inadvertently, the sample was not preserved according to approved methods. This oversight, the unexpectedly high results, and similarity between dissolved and total recoverable forms, resulted in significant doubt as to the validity of the data.
By 7:45 AM Friday morning, the pH in the tower basin had been restored to within the permitted limits, and thus the CTB discharge was resumed. The restored a subsidiaryofAmeren Corporation
discharge was later sampled and when the results became available early Saturday morning (October 12 th) the total recoverable copper concentration was 1.20 mg/I, well in excess of the 0.3 mg/1 permit limit. Based on this data, the CTB discharge was again terminated, at 1:08 AM Saturday.
Without blowdown the plant can only maintain generation for a limited time before beginning to reduce power output and eventually shutting down. Over the next fifteen hours the plant worked to develop an overall solution to the dilemma focusing on how to restore compliance. Since no feasible treatment options were identified, to manage and correct the elevated copper concentration, plant staff initiated discussions with DNR through the State emergency response line, to determine whether temporary relief from the permit limitations could be granted. In the meantime, they developed a number of options to mitigate possible impacts if the discharge was restored. Special DNR authorization could not be obtained.
Without other prudent options, plant management decided to resume discharging in order to regain control over the basin chemistry, relying on_an_ optimum combination ofblowdown and makeup water flows. At 4:35 PM Saturday evening, the CTB discharge was restored. A sample taken on Wednesday, October 16, at 8 AM confirmed that the copper concentration in the CTB discharge (at Outfall #002) was, once again, within permit limits.
Permit and Water Quality Implications The initial discovery of the pH sag and excessive sulfuric acid feed, prompted AmerenUE's spill coordinator to report the incident to the National Response Center and the Missouri DNR on Friday afternoon, October 11 . At that time the copper excursion was unconfirmed. When the copper violation was indicated and the blowdown terminated the second time, DNR's Emergency Response Center was again notified.
As Callaway Plant monitors pH continuously, the NPDES permit allows limited monthly excursions, with allowances of both individual periods and a cumulative duration. As these were exceeded, the attached noncompliance report was triggered.
While not initially recognized, the same event resulted in the exceedance of the copper limit as described above.
Numerous steps were taken to minimize the impacts of the elevated copper concentration within the cooling tower basin while isolated and following restoration of the discharge. They included:
- 1. Diversion of approximately one million gallons of CTB water to the Ultimate Heat Sink (without discharge) to allow additional makeup water to be added to the tower.
- 2. Addition of makeup water to raise the level (to the maximum operating depth) within the tower; which in conjunction with item I above reduced the copper concentration by approximately fifteen percent.
- 3. Limiting the CTB discharge flow rate, once resumed, and utilizing the CT bypass outfall (Outfall #016) to dilute the discharge - in an attempt to keep the copper concentration, at the point of discharge to the Missouri River, below the Outfall 002 limitation.
- 4. A commitment to sample the discharge every eight hours and adjust discharge conditions until the copper excursion was eliminated.
Summary Note that we are confident that the elevated copper did not result in a significant environmental impact on the receiving water. Mixing zone calculations based on river/CTB flows and copper monitoring results, indicate the concentration at the edge of the "zone of initial dilution" was well below all applicable copper water quality standards, throughout the entire excursion period.
In addition to the attached report, a complete listing of CTB effluent samples and analytical data will be provided with the next Discharge Monitoring Report. We believe our actions resulted in the necessary steps to minimize any adverse impact to waters of the state. If you have any questions or need additional information please call.
Sincerely, Michael F. Bollinger Consulting Environmental Scientist
Ameren UE NPDES PERMIT EVENT REPORT Callaway Plant Permit No. MO-0098001 Date: October 17, 2002
- 1. Chemical Analysis:
r02138 6.6 (Note 1) 3.01 <0.01 0.1 78 1.2 Note 1: Sample taken in plastic bottle.
- 2. Description of Discharge: Cooling Tower Blowdown, Outfall 002, discharge of pH 3.01 water with 1.2 ppm total recoverable copper.
- 3. Cause of Permit Event: A flow control valve is used to control the flow of acid into the Cooling Tower Basin. The flow control valve is controlled by a PLC (Programmable Logic Controller) and is designed to use PID (Proportional, Integral, Derivative) control to adjust acid flow to match the Circulating Water pH setpoint of 8.5. The PLC failed in a "no flow" loop that modulates the valve full open and then back closed in order to clear any obstructions in the acid line. As a result of the PLC failing, the acid valve cycled between full open and full closed continuously until discovery of the low pH
- 4. Period of Permit Event (Dates/Times): pH: From 10-10-02 @ 1623 to 10-11-02 @ 0050. Cu: From 10-12-02 @ 1635 to 10-16-02 @ 0800.
- 5. Corrective Action Being Taken: Cooling Tower Blowdown was isolated upon discovery of low pH effluent and again upon discovery of high copper results. Outfall 002 was blended with Outfall 016, Cooling Tower Bypass, to reduce the total recoverable copper at the point of discharge into the Missouri River to less than 0.3 ppm. The PLC program that automatically controls the acid flow control valve to the cooling tower basin has been disabled. Manual control of the acid flow control valve will be maintained until plant engineering staff have corrected the problem.
APPROVED BY:_____________________
Plant Manager Page 1 of 1 CA0319 09/13/99 APA-ZZ-00810
Ameren Services One Ameren Plaza 1901 Chouteau Avenue Environmental,Safety & Health PO Box 66149 314.554.3063 (Phone) St. Louis, MO 63166-6149 314.554.4182 (Facsimile) 314.621.3222 wmmueller@ameren.com October 17, 2002 Mr. Ed Galbrath Missouri Department of Natural Resources P.O. Box 176 Jefferson City, MO 65102-0176
Dear Mr. Galbrath:
This letter is a written report per 40CFR Part 355 regarding a release of acidic water reported on October 11, 2002 at the Ameren Callaway Nuclear Plant.
(i) The chemical name or identity of any substance involved in the release.
The product released was acidic water with a pH of 3 resulting from an over injection of 93% sulfuric acid in the cooling tower water system.
(ii) An indication of whether the substance is an extremely hazardous substance.
Sulfuric acid is an extremely hazardous substance per 40CFR 355 Appendix A.
(iii) An estimate of the quantity of any such substance that was released into the environment.
Based on the pH measured at the outfall to the Missouri River and the estimated duration and flow, a maximum of 19,000 pounds was released.
(iv) The time and duration of the release.
The release was discovered on 10/11/02 at 0045. The cooling tower blowdown was isolated five minutes later.
(v) The medium or media into which the release occurred.
The release was into the Missouri River at river mile 115.5.
(vi) Any known or anticipated acute or chronic health risks associated with the emergency and, where appropriate, advice regarding medical attention necessary for exposed individuals.
There were no known or anticipated health risks associated with this release.
a subsidiary of Ameren Corporation
(vii) Proper precautions taken as a result of the release, including evacuation (unless such information is readily available to the community emergency coordination pursuant to the emergency plan).
The cooling tower blow down discharge valve was closed approximately five minutes after discovery. The cooling tower basin water was neutralized by normal addition of alkaline river water to make up for evaporation, and normal cycling of the cooling tower basin water with the blowdown valve isolated. Discharge of cooling tower basin water resumed around 0745 on 10-11-02 when pH was greater than 6.
(viii) The names and telephone number of the person or persons to be contacted for further information.
Charlie Riggs 573-676-8365 (ix) Actions taken to respond to and contain the release.
The cooling tower blow down discharge valve was closed approximately five minutes after discovery. The cooling tower basin water was neutralized until a pH greater than 6 was achieved and discharge resumed around 0745.
(x) Any known or anticipated acute or chronic health risks associated with the release.
None (xi) Where appropriate, advice regarding medical attention necessary for exposed individuals.
None If you have any questions, please contact me at (314) 554-3063 or Charlie Riggs at (573) 676-8365.
Sincerely, Warren M. Mueller Supervisor Property Remediation & Emergency Response cc: Callaway County LEPC Mr. Tim Diemler P.O. Box 817 Fulton, MO 65251