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| | issue date = 10/23/2013 | | | issue date = 10/23/2013 |
| | title = NRC Response to 9/23/2013 Email from Betty Shank Regarding Limerick'S Potential Inability to Safely Shutdown | | | title = NRC Response to 9/23/2013 Email from Betty Shank Regarding Limerick'S Potential Inability to Safely Shutdown |
| | author name = Bower F L | | | author name = Bower F |
| | author affiliation = NRC/RGN-I/DRP/PB4 | | | author affiliation = NRC/RGN-I/DRP/PB4 |
| | addressee name = Shank B | | | addressee name = Shank B |
Revision as of 21:19, 21 June 2019
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Category:E-Mail
MONTHYEARML24199A1842024-07-15015 July 2024 RAI-LAR for Limerick EPID: L-2024-LLA-0079- Use This Version ML24197A0162024-07-12012 July 2024 NRR E-mail Capture - Final RAI - Constellation Energy Generation, LLC - Fleet Request - License Amendment Request to Adopt TSTF-591 ML24176A1292024-06-20020 June 2024 Estimated Completion Schedule Change Email ML24156A0082024-05-31031 May 2024 NRR E-mail Capture - Constellation Energy, LLC - Fleet Request - Acceptance of Proposed Alternative Concerning Extension of Permanent Relief from Ultrasonic Examination of Reactor Pressure Vessel Circumferential Shell Welds (L-2024-LLR-0031 ML24131A0612024-05-10010 May 2024 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of Proposed Alternative to Utilize Code Case OMN-32 (L-2024-LLR-0030) ML24107A9192024-05-0808 May 2024 Email to Christian Williams Re Decision on the Limerick Exemption ML24107A9202024-05-0303 May 2024 Email to Christian Williams Re Availability of Environmental Assessment for the Limerick Exemption ML24122C6742024-05-0101 May 2024 Response to a Request from NRC Review of a Draft EA for an Exemption for the Limerick Generating Station ML24122B5072024-05-0101 May 2024 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of License Amendment Request to Adopt TSTF-591, Revision 0 ML24122C6702024-04-29029 April 2024 Request from NRC Review of a Draft EA for an Exemption for the Limerick Generating Station ML24051A0652024-02-16016 February 2024 Digital I&C LAR RAIs Re HFE (Email) ML24026A2922024-01-26026 January 2024 – Request for Additional Information Regarding Limerick Digital Instrumentation and Controls License Amendment Request ML23331A0062023-11-22022 November 2023 (External Sender) Supplement - Limerick Security Rule Exemption Request ISFSI Docket No. Reference ML23311A2412023-11-0707 November 2023 NRR E-mail Capture - NRC Notification to the Commonwealth of Pennsylvania Re. Limerick Generating Station, Units 1 and 2 Amendment - Control Room Ventilation System Technical Specifications ML23304A0192023-10-30030 October 2023 NRR E-mail Capture - Final RCI - Constellation Energy Generation, LLC - Limerick 1 & 2 - Exemption from Security Rule (L-2023-LLE-0026) ML23276B4642023-10-0303 October 2023 NRR E-mail Capture - NRC Request for Additional Information Limerick TSTF-477 LAR ML23255A2872023-09-12012 September 2023 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of Alternative to Use the Successive Inspection Requirements of BWRVIP-75-A ML23248A1282023-09-0101 September 2023 NRR E-mail Capture - Action: Opportunity to Review and Comment on a New NRC Information Collection, 10 CFR Part 50.55a, Codes and Standards (3150-XXXX) ML23237B3972023-08-24024 August 2023 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of Alternative Request to Use Updated BWRVIP Guidelines ML23208A1942023-07-27027 July 2023 NRR E-mail Capture - Limerick Generating Station - Audit Plan for TSTF-477 LAR Review (L-2022-LLA-0174) ML23202A0682023-07-21021 July 2023 NRR E-mail Capture - NRC Request for Additional Information Re. TSTF-477 LAR ML23201A1262023-07-18018 July 2023 Additional RAIs for Limerick Generation Station, Units 1 and 2 - LAR and Exemption Request for Digital I&C Installation Support ML23173A0632023-06-20020 June 2023 RAIs for Limerick Generation Station, Units 1 and 2 - LAR and Exemption Request for Digital I&C Installation Support ML23102A1642023-04-12012 April 2023 Generation Station, Unit No. 2 Potential Emergent Relief Request for HPCI IST (EPID L-2023-LLR-0015) - Closure E-mail Dated 4/12/2023 ML23125A0522023-03-31031 March 2023 NRR E-mail Capture - Clean OL Pages for 50.69 LAR ML23089A1602023-03-30030 March 2023 NRR E-mail Capture - NRC Notification to the Commonwealth of Pennsylvania Re. Limerick Generating Station, Units 1 and 2 Amendment - Alternative 10 CFR 50.69 Categorization Approaches ML23086B9282023-03-27027 March 2023 Acceptance of Requested Licensing Action for License Amendment Request to Support Digital Modernization Project Installation ML23086A0822023-03-27027 March 2023 Acceptance of Requested Licensing Action for Exemption Request to Support Digital Modernization Project Installation ML22354A2622022-12-20020 December 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of Request to Use Certain Provisions of the 2019 Edition of the ASME BPV Code, Section XI ML23060A1662022-12-20020 December 2022 Acceptance Review: Adopt TSTF-477, Revision 3-Acceptance Letter ML22200A0782022-07-19019 July 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request to Use Honeywell Mururoa V4F1 R Supplied Air Suits ML22172A0752022-06-17017 June 2022 Response: Review and Feedback on Draft Limerick Digital License Amendment Request (L-2020-LRM-0041) ML22136A0032022-05-13013 May 2022 NRR E-mail Capture - NRC Request for Additional Information - Limerick License Amendment Request (L-2021-LLA-0042) ML22124A2862022-05-0404 May 2022 Information Needed to Provide Substantive Feedback on Human Factors Engineering Supporting the Planned Limerick Digital I&C License Amendment Request ML22089A1172022-03-30030 March 2022 Additional Comments and Questions on Constellation'S March 31st Presentation ML22089A1162022-03-28028 March 2022 Comments and Questions on Constellation'S March 31st Presentation ML22112A2152022-03-28028 March 2022 Limerick_Acceptance Review TS Change to Correct Nonconservative Technical Specification Table 3.3.3-1 ML22041B5362022-02-10010 February 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Request for Additional Information Regarding Fleet License Amendment Request to Adopt TSTF-541 ML22034A0142022-02-0202 February 2022 NRR E-mail Capture - Audit Plan Supplement for LIM 50.69 LAR (L-2021-LLA-0042) ML22028A1832022-01-24024 January 2022 NRR E-mail Capture - Audit Plan Supplement for LIM 50.69 LAR (L-2021-LLA-0042) ML22020A0642022-01-13013 January 2022 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative for Repair of Water Level Instrumentation Partial Penetration Nozzles ML22005A1812022-01-0505 January 2022 NRR E-mail Capture - Staff'S Questions Pertaining to Limerick Generating Station Digital Modernization Project LAR Pre-submittal Meeting Slides December 7, 2021 ML21301A0672021-10-28028 October 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Amendment Request to Adopt TSTF-541 ML21295A0362021-10-20020 October 2021 NRR E-mail Capture - Supplement to Limerick 50.69 Audit Plan Dated October 1, 2021 (L-2021-LLA-0042) ML21286A0302021-10-13013 October 2021 Staff'S Questions Pertaining to Limerick Generating Station Digital Modernization Project LAR Pre-submittal Meeting Slides October 20, 2021 ML21256A1902021-09-10010 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21252A0482021-09-0707 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet Alternative Request for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21215A3502021-08-0303 August 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Amendment Request to Adopt TSTF-554 ML21154A0132021-05-28028 May 2021 NRR E-mail Capture - Extension of Comment Period for the Exelon Generation Company, LLC License Transfer Application ML21154A0142021-05-28028 May 2021 NRR E-mail Capture - Extension of Comment Period for the Exelon Generation Company, LLC License Transfer Application 2024-07-15
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From: Bower, Fred Sent: Wednesday, October 23, 2013 10:06 AM To: BettyShank@comcast.net Cc: Barber, Scott; Thompson, Margaret; Screnci, Diane; Sheehan, Neil; McNamara, Nancy; Tifft, Doug; Gray, Mel; Pinkham, Laurie
Subject:
Response to 9/23/2013 Email from Betty Shank Regarding Limerick's Potential Inability to Safely Shutdown (EDATS RI-2013-0294)
Dear Ms. Shank,
My name is Fred Bower and I am writing to you in response to an email that you sent Mr. Mel Gray on September 23, 2013. In this email, you reiterated questions from your August 5, 2013, email that Mr. Gray answered in an email dated September 4, 2013.
I understand your questions to be related to actions that Limerick took in response to a generic issue reported by the reactor vendor (GE Hitachi Nuclear Energy) in NRC Event Report Number 46230 (ADAMS Accession # ML12040A283). Specifically, GE Hitachi (GEH) reported that they had determined that the scram capability of the control rod drive mechanism in BWR/2-5 plants may not be sufficient to ensure the control rod will fully insert in a cell with channel-control rod friction at or below the friction limits specified in MFN 08-420 with a concurrent Safe Shutdown Earthquake (SSE). As you can see in the 9/27/11 update to the event report, GE Hitachi recommended to their customers that testing with new allowable friction limits that will ensure control rods fully insert at low reactor pressure concurrent with an SSE (for Mark I containment plants) and SSE with concurrent LOCA (for Mark II containment plants), such as Limerick. Exelon refers to the recommended testing as "distortion testing." You may find additional information on the recommended testing in ADAMS Package ML120380362; however, you will find that many details of this testing are proprietary and have been redacted. To perform our regulatory function, the NRC may view this information, but it cannot be released to the public.
As was mentioned in Mr. Gray's September 4, 2013, email, our inspectors reviewed this information, observed testing and noted acceptable results.
In summary, I believe that Mr. Gray's email dated September 4, 2013, fully answered all the questions you asked in your August 5 and September 23 emails. Hopefully, the information above provides additional clarification.
Please call me at the phone number listed below if you would like to discuss this issue further.
Sincerely,
Fred Bower Chief l Projects Branch 4 l Division of Reactor Projects l Region I l U.S. NRC 2100 Renaissance Boulevard, STE 100, King of Prussia, PA 19406 l : (610) 337-5200 l BB: (610) 731-1920 l : Fred.Bower@nrc.gov