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Category:Press Release
MONTHYEARML23165A2342023-03-0303 March 2023 News Release-23-019: NRC Issues Annual Assessments for Nations Nuclear Power Plants ML22153A1312022-05-24024 May 2022 News Release-III-22-014: NRC to Hold Webinar to Discuss 2021 Performance of Dresden and Quad Cities Nuclear Power Plants Press Release-III-21-014, NRC Names New Resident Inspector at Quad Cities Nuclear Power Plant2021-06-23023 June 2021 Press Release-III-21-014: NRC Names New Resident Inspector at Quad Cities Nuclear Power Plant Press Release-III-21-012, NRC to Hold Virtual Meeting to Discuss 2020 Performance of Dresden and Quad Cities Nuclear Power Plants2021-06-22022 June 2021 Press Release-III-21-012: NRC to Hold Virtual Meeting to Discuss 2020 Performance of Dresden and Quad Cities Nuclear Power Plants Press Release-III-21-001, NRC Names New Senior Resident Inspector at Quad Cities Nuclear Power Plant2021-01-0505 January 2021 Press Release-III-21-001: NRC Names New Senior Resident Inspector at Quad Cities Nuclear Power Plant Press Release-III-20-009, NRC to Hold Virtual Meeting to Discuss 2019 Performance of Dresden and Quad Cities Nuclear Power Plants2020-07-23023 July 2020 Press Release-III-20-009: NRC to Hold Virtual Meeting to Discuss 2019 Performance of Dresden and Quad Cities Nuclear Power Plants Press Release-III-19-008, NRC to Hold Open House to Discuss 2018 Performance of Quad Cities Nuclear Power Station2019-04-24024 April 2019 Press Release-III-19-008: NRC to Hold Open House to Discuss 2018 Performance of Quad Cities Nuclear Power Station Press Release-III-18-018, NRC to Hold Open House to Discuss 2017 Performance of Quad Cities Nuclear Power Plant2018-05-24024 May 2018 Press Release-III-18-018: NRC to Hold Open House to Discuss 2017 Performance of Quad Cities Nuclear Power Plant Press Release-III-17-011, NRC to Conduct Open House to Discuss 2016 Performance of Quad Cities Nuclear Power Plant2017-05-17017 May 2017 Press Release-III-17-011: NRC to Conduct Open House to Discuss 2016 Performance of Quad Cities Nuclear Power Plant Press Release-III-16-006, NRC to Hold Open House to Discuss Agency'S Assessment of Quad Cities Nuclear Power Plant2016-05-0303 May 2016 Press Release-III-16-006: NRC to Hold Open House to Discuss Agency'S Assessment of Quad Cities Nuclear Power Plant Press Release-III-14-021, NRC Schedules Open House June 17 to Discuss Performance of Quad Cities Nuclear Power Station2014-06-11011 June 2014 Press Release-III-14-021: NRC Schedules Open House June 17 to Discuss Performance of Quad Cities Nuclear Power Station Press Release-III-14-015, NRC Names New Senior Resident Inspector at Quad Cities Nuclear Station2014-05-0505 May 2014 Press Release-III-14-015: NRC Names New Senior Resident Inspector at Quad Cities Nuclear Station Press Release-III-14-013, NRC Monitoring Alert at Quad Cities Nuclear Power Plant2014-04-0202 April 2014 Press Release-III-14-013: NRC Monitoring Alert at Quad Cities Nuclear Power Plant Press Release-III-13-022, NRC Will Hold a June 11 Open House on Quad Cities Nuclear Power Plant 2012 Performance2013-06-0303 June 2013 Press Release-III-13-022: NRC Will Hold a June 11 Open House on Quad Cities Nuclear Power Plant 2012 Performance Press Release-III-12-020, NRC Schedules June 12 Open House to Discuss Quad Cities Nuclear Power Station Performance and NRC Oversight2012-06-0404 June 2012 Press Release-III-12-020: NRC Schedules June 12 Open House to Discuss Quad Cities Nuclear Power Station Performance and NRC Oversight Press Release-III-11-003, NRC Schedules Open House for April 5 to Discuss Quad Cities Nuclear Power Plant Performance and NRC Oversight2011-03-28028 March 2011 Press Release-III-11-003: NRC Schedules Open House for April 5 to Discuss Quad Cities Nuclear Power Plant Performance and NRC Oversight Press Release-III-10-025, NRC Schedules Open House to Discuss Quad Cities Nuclear Power Plant Performance and Related Issues June 152010-06-11011 June 2010 Press Release-III-10-025: NRC Schedules Open House to Discuss Quad Cities Nuclear Power Plant Performance and Related Issues June 15 Press Release-III-09-008, NRC to Discuss 2008 Performance Assessment for Quad Cities Nuclear Power Plant Unit 1 and 22009-03-31031 March 2009 Press Release-III-09-008: NRC to Discuss 2008 Performance Assessment for Quad Cities Nuclear Power Plant Unit 1 and 2 Press Release-III-08-037, NRC Names New Resident Inspector at Quad Cities Nuclear Power Plant2008-09-22022 September 2008 Press Release-III-08-037: NRC Names New Resident Inspector at Quad Cities Nuclear Power Plant Press Release-III-08-022, NRC to Discuss 2007 Performance Assessment for Quad Cities Unit 1 and 2 Nuclear Power Plant2008-05-19019 May 2008 Press Release-III-08-022: NRC to Discuss 2007 Performance Assessment for Quad Cities Unit 1 and 2 Nuclear Power Plant Press Release-III-07-016, NRC to Discuss 2006 Performance Assessment for Quad Cities Nuclear Power Plant2007-04-12012 April 2007 Press Release-III-07-016: NRC to Discuss 2006 Performance Assessment for Quad Cities Nuclear Power Plant Press Release-III-06-027, NRC Finds Inadequate Valve Analysis Prior to Power Uprate to Be of Low to Moderate Safety Significance2006-06-30030 June 2006 Press Release-III-06-027: NRC Finds Inadequate Valve Analysis Prior to Power Uprate to Be of Low to Moderate Safety Significance Press Release-III-06-025, NRC to Discuss 2005 Performance Assessment for Quad Cities Nuclear Power Plant2006-06-12012 June 2006 Press Release-III-06-025: NRC to Discuss 2005 Performance Assessment for Quad Cities Nuclear Power Plant ML0613504212006-05-11011 May 2006 NRC News - NRC Region III Tritium Inspection Activities ML0613201402006-05-11011 May 2006 NRC News Dated 5/11/2006 NRC Region III Tritium Inspection Activities Press Release-III-06-002, NRC Begins Special Inspection at Quad Cities Nuclear Plant2006-01-10010 January 2006 Press Release-III-06-002: NRC Begins Special Inspection at Quad Cities Nuclear Plant Press Release-III-05-026, NRC to Discuss 2004 Performance Assessment for Quad Cities Nuclear Power Plant2005-05-19019 May 2005 Press Release-III-05-026: NRC to Discuss 2004 Performance Assessment for Quad Cities Nuclear Power Plant Press Release-04-138, NRC Renews Licenses for Dresden and Quad Cities Nuclear Power Plants for an Additional 20 Years2004-10-28028 October 2004 Press Release-04-138: NRC Renews Licenses for Dresden and Quad Cities Nuclear Power Plants for an Additional 20 Years Press Release-04-083, NRC Finds No Significant Environmental Impacts from Extended Operation of Dresden and Quad Cities Nuclear Plants2004-07-0808 July 2004 Press Release-04-083: NRC Finds No Significant Environmental Impacts from Extended Operation of Dresden and Quad Cities Nuclear Plants Press Release-III-04-025, NRC to Meet with Exelon Generation Company to Discuss Performance of Quad Cities Nuclear Plant2004-04-22022 April 2004 Press Release-III-04-025: NRC to Meet with Exelon Generation Company to Discuss Performance of Quad Cities Nuclear Plant Press Release-I-03-045, NRC to Meet with Exelon to Discuss Status of Company'S Reactors2003-07-28028 July 2003 Press Release-I-03-045: NRC to Meet with Exelon to Discuss Status of Company'S Reactors Press Release-03-093, NRC to Hold Public Meeting July 25 on Quad Cities Nuclear Plant Steam Dryer Cracks and Future Uprates2003-07-16016 July 2003 Press Release-03-093: NRC to Hold Public Meeting July 25 on Quad Cities Nuclear Plant Steam Dryer Cracks and Future Uprates Press Release-III-03-044, NRC Special Inspection of Reactor Component Damage at Quad Cities2003-06-23023 June 2003 Press Release-III-03-044: NRC Special Inspection of Reactor Component Damage at Quad Cities Press Release-III-03-034, Special Inspection Team to Review Valve Failure at Quad Cities Plant2003-04-17017 April 2003 Press Release-III-03-034: Special Inspection Team to Review Valve Failure at Quad Cities Plant Press Release-III-03-013, NRC to Meet with Exelon Nuclear Officials to Discuss Safety Performance at Quad Cities Nuclear Power Plant2003-03-26026 March 2003 Press Release-III-03-013: NRC to Meet with Exelon Nuclear Officials to Discuss Safety Performance at Quad Cities Nuclear Power Plant Press Release-III-02-008, NRC to Meet with Exelon Generation Co. April 2 to Discuss Quad Cities Nuclear Power Station Performance2002-03-27027 March 2002 Press Release-III-02-008: NRC to Meet with Exelon Generation Co. April 2 to Discuss Quad Cities Nuclear Power Station Performance Press Release-III-02-001, NRC Begins Special Inspection of Pump Problem at Quad Cities Plant2002-01-16016 January 2002 Press Release-III-02-001: NRC Begins Special Inspection of Pump Problem at Quad Cities Plant 2023-03-03
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NRC NEWS U.S. NUCLEAR REGULATORY COMMISSION 2443 Warrenville Road Lisle IL 60532 Web Site: http://www.nrc.gov E-mail: opa3@nrc.gov No. III-06-027 June 30, 2006 CONTACT: Jan Strasma (630) 829-9663 Viktoria Mitlyng (630) 829-9662 NRC FINDS INADEQUATE VALVE ANALYSIS PRIOR TO POWER UPRATE TO BE OF LOW TO MODERATE SAFETY SIGNIFICANCE The Nuclear Regulatory Commission staff has issued its final determination that the Quad Cities Nuclear Power Station failed to ensure that Unit 1 electromatic relief valves function properly when exposed to the increased vibrations. Increased vibrations occurred following Quad Cities implementing a 2002 extended power uprate of both reactor units. The NRC determined the failure to ensure the electromatic relief valves function properly to be of low to moderate safety significance.
The plant is operated by Exelon Generation Co.
Electromatic relief valves perform safety-significant functions of protecting the reactor vessel from overpressure and of depressurizing the reactor quickly in certain conditions.
Quad Cities staff identified the degradation of electromatic relief valve actuators in December 2005 and January 2006.
In January 2006, the NRC conducted a special inspection to understand the reasons for the degradation, review the historical usage and maintenance of the valves, evaluate the plants response to previously identified indications associated with suspect valve operability, and assess the Quad Cities staffs efforts to determine the extent of the problem.
A follow-up inspection, conducted in May 2006, focused on reviewing the plants understanding of the root cause for the electromatic relief valve actuator degradation.
The NRC found that Quad Cities failed to establish design controls to ensure that the electromatic relief valve actuators would function properly when exposed to increased vibrations of the main steam line that occurs as a result of an extended reactor power uprate. Even though this finding did not present an immediate safety concern because the reactor was shut down when the issue was identified, the NRC determined that Quad Cities had likely operated for a period of time with multiple electromatic relief valves being inoperable.
The NRCs finding shows how important it is to thoroughly review the design of safety-significant equipment that could be vulnerable to increased main steam line vibrations before implementing an extended power uprate, said James Caldwell, NRC Regional Administrator. It is also important for plant staff to pay attention to early indicators of a problem and to address them in a timely and efficient manner.
The companys corrective actions included replacing the Unit 1electromatic relief valve actuators, installing new electromatic relief valve actuators designed to withstand the increased vibrations, and installing an additional modification to reduce the overall main steam line vibration levels.
White findings normally result in additional NRC inspections and meetings with the utility.
Based on the white finding, the NRC issued a Notice of Violation to Exelon Generation Co. for its failure to ensure that the application of the electromatic relief valve actuators, which perform important safety-related functions, remained suitable for operation prior to implementing an extended power uprate. The company is required to respond to the Notice of Violation within 30 days, describing its corrective actions and steps it is taking to prevent a recurrence of the violation.
The letter notifying Exelon of the white finding will be available from the NRCs Region III Office of Public Affairs or in the NRCs online document library at:
http://www.nrc.gov.reading-rm/adams/web-based.html .