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Category:E-Mail
MONTHYEARML24221A0082024-08-0707 August 2024
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Acceptance of License Amendment Request to Remove the Table of Contents from the Technical Specifications
ML24204A0012024-07-17017 July 2024
NRR E-mail Capture - Request for Additional Information Vistraops Fleet Exemption for the Requirements in 10 CFR 50.71 Pertaining to the Submittal of Updated Final Safety Analysis Reports
ML24170B0562024-06-18018 June 2024
NRR E-mail Capture - Acceptance Review Results for Davis-Besse, Unit No. 1 - RR-A1 ISI Impracticality
ML24061A1002024-03-29029 March 2024
Energy Harbor Fleet- Closing of Transaction Between Vistra Operations Company LLC and Energy Harbor Nuclear Corporation (Email)
ML24080A3922024-03-20020 March 2024
NRR E-mail Capture - Beaver Valley Power Station, Unit Nos. 1 and 2, Davis-Besse Power Station Unit No. 1, and Perry Nuclear Power Plant, Unit No. - Acceptance of Requested Licensing Action Exemption for Final Safety Analysis Report Update
ML23128A1612023-05-0808 May 2023
NRR E-mail Capture - Comanche Peak Nuclear Power Plant, Units 1 and 2, Beaver Valley Power Station, Unit Nos. 1 and 2, Davis-Besse Nuclear Power Station, Unit 1, and Perry Nuclear Power Plant, Unit No. 1 - Acceptance of Requested Licensing
ML23086B9862023-03-27027 March 2023
NRR E-mail Capture - Davis-Besse, Unit No. 1 - Acceptance Review Results for Davis-Besse, Unit No. 1 - Proposed Alternative Request RP-5
ML23033A0322023-02-0101 February 2023
NRR E-mail Capture - Request for Additional Information for Davis-Besse's 2022 Steam Generator Inspection Report (L-2022-LRO-0115)
ML22266A1102022-09-23023 September 2022
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Request for Additional Information Regarding July 21, 2022, Request for Withholding Information from Public Disclosure
ML22164A8572022-06-13013 June 2022
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Request for Additional Information Regarding License Amendment Request to Revise the Emergency Plan
ML22118A6862022-04-28028 April 2022
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Request for Additional Information Regarding Alternative to Extend the Steam Generator Weld Inspection Interval
ML22112A1092022-04-22022 April 2022
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Request for Additional Information Regarding License Amendment Request to Revise the Design Basis for the Shield Building
ML22090A1692022-03-30030 March 2022
Re_ Action Tracking Item 2022 SST - 335 - Tom Gurdziel, E-mail Re_ Event Number 55734 at Davis Besse, a Matter of Interpretation
ML22080A2512022-03-18018 March 2022
NRR E-mail Capture - (External_Sender) ASME OM Code Case OMN-27, Alternative Requirements for Testing Category a Valves (Non- Piv/Civ)
ML22055B0382022-02-24024 February 2022
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Upcoming Steam Generator Tube Inservice Inspection
ML22055A0872022-02-23023 February 2022
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Request for Additional Information Regarding Relief Request RP-3
ML22045A4962022-02-14014 February 2022
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Acceptance of License Amendment Request to Revise the Emergency Plan
ML22040A1832022-02-0707 February 2022
LTR-22-0033 Tom Gurdziel, E-mail Event Number 55734 at Davis Besse, a Matter of Interpretation
ML22034A9472022-02-0303 February 2022
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Revised Review Estimates for Proposed Alternative to Extend the Steam Generator Weld Inspection Interval
ML22033A0632022-02-0101 February 2022
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Acceptance of License Amendment Request to Revise the Design Basis for the Shield Building Containment Structure
ML21321A3782021-11-16016 November 2021
NRR E-mail Capture - Energy Harbor Fleet, Beaver Valley Units 1 and 2 and DAVIS-BESSEL Unit 1 - Acceptance of License Amendment Request Adoption of TSTF-554 EPID-L-2021-LLA-0193
ML21321A3792021-11-16016 November 2021
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Request for Additional Information Regarding Alternative to Extend the Steam Generator Weld Inspection Interval
ML21287A0382021-10-14014 October 2021
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Acceptance of Requests for Relief from Certain Inservice Testing Requirements
ML21271A1332021-09-28028 September 2021
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Acceptance of Proposed Alternative RR-A2 for Certain Steam Generator Weld Inspections
ML21119A2152021-04-28028 April 2021
NRR E-mail Capture - Energy Harbor Fleet, Beaver Valley Units 1 and 2 and DAVIS-BESSE Unit 1 - Acceptance of Relief Request Proposed Alternative to Use ASME OM Code Case OMN-27
ML21041A5452021-02-10010 February 2021
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Request for Additional Information Regarding Steam Generator Tube Inspection Reports
ML21007A3732021-01-0707 January 2021
NRR E-mail Capture - (External_Sender) (External) Request for Additional Information Regarding License Amendment Request to Incorporate the Applicable Standard Technical Specification 5.2.2, Unit Staff,
ML21004A1442020-12-30030 December 2020
NRR E-mail Capture - Request for Additional Information Regarding License Amendment Request to Incorporate the Applicable Standard Technical Specification 5.2.2, Unit Staff
ML20329A3832020-11-24024 November 2020
NRR E-mail Capture - Davis Besse Nuclear Power Station, Unit No. 1 - Request for an Exemption from the 2020 Force-on-Force Exercises
ML20304A2842020-10-29029 October 2020
50.59 Inspection 2nd Request for Information
ML20289A0992020-10-0505 October 2020
NRR E-mail Capture - Energy Harbor Fleet, Results of Acceptance Review Request to Use Provision in Later Edition of the ASME Boiler and Pressure Vessel Code, Section XI, EPID-l-2020-LLR-0132
ML20281A3692020-10-0505 October 2020
Energy Harbor Fleet, Results of Acceptance Review Request to Use Provision in Later Edition of the ASME Boiler and Pressure Vessel Code, Section XI, EPID-l-2020-LLR-0132
ML20239A7942020-08-25025 August 2020
NRR E-mail Capture - Energy Harbor Fleet, Beaver Valley Units 1 and 2 and DAVIS-BESSEL Unit 1 - Acceptance of License Amendment Request Incorporation of Applicable Standard in TS 5.2.2.e
ML20203M3722020-07-21021 July 2020
Ultimate Heat Sink Request for Information Part 1 and Part 2
ML20203M3712020-07-21021 July 2020
Ultimate Heat Sink Request for Information Part 1
L-20-183, Response to Request for Additional Information Regarding License Amendment Request for Adoption of TSTF-425, Revision 3, Relocate Surveillance Frequencies to Licensee Control - Risk Informed Technical Specification Task Force2020-06-23023 June 2020
Response to Request for Additional Information Regarding License Amendment Request for Adoption of TSTF-425, Revision 3, Relocate Surveillance Frequencies to Licensee Control - Risk Informed Technical Specification Task Force
ML20154K7642020-06-0202 June 2020
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Request for Additional Information Regarding License Amendment Request to Adopt TSTF-425
ML20127H8672020-05-0606 May 2020
NRR E-mail Capture - Beaver Valley, Davis-Besse, and Perry - Request for Additional Information Regarding Request for Exemptions from Part 73 Security Requalification Requirements
ML20058D3152020-02-27027 February 2020
Completion of License Transfer for the Beaver Valley, Davis-Besse and Perry Nuclear Units
ML20024E0092020-01-23023 January 2020
NRR E-mail Capture - FENOC License Transfer - January 23, 2020 Call Summary
ML20021A3162020-01-21021 January 2020
NRR E-mail Capture - Davis-Besse Nuclear Power Station - Request for Additional Information Regarding License Amendment Request to Revise Containment Leakage Rate Testing
ML19346B3972019-12-11011 December 2019
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Acceptance of License Amendment Request to Adopt TSTF-425
ML19273A1132019-09-27027 September 2019
NRR E-mail Capture - Davis-Besse Nuclear Power Station - Acceptance of License Amendment Request to Extend Containment Leakage Rate Test Interval
ML19179A1382019-06-28028 June 2019
NRR E-mail Capture - Davis-Besse - Request for Additional Information Regarding the Decommissioning Quality Assurance Program
ML19164A1532019-06-13013 June 2019
NRR E-mail Capture - Davis-Besse Nuclear Power Station - Request for Additional Information Regarding License Amendment Request for Post-Shutdown Emergency Plan
ML19162A3922019-06-11011 June 2019
NRR E-mail Capture - Davis-Besse Nuclear Power Station - Request for Additional Information Regarding License Amendment Request for Permanently Defueled Technical Specifications
ML19161A2132019-06-0606 June 2019
NRR E-mail Capture - Results of Acceptance Review - FENOC Fleet - Request for Approval of Request for Approval of Lrradiated Fuel Management Plans, EPID L-2019-LRO-0016
ML19149A6202019-05-29029 May 2019
NRR E-mail Capture - Davis-Besse Nuclear Power Station, Unit No. 1 - Request for Approval of the Decommissioning Quality Assurance Program
ML19130A2082019-05-0808 May 2019
Email - NRC Email to FEMA Dated May 8, 2019: NRC Response to Comment on FEMA Review of Proposed Changes to DBNPS Emergency Plan for Permanently Defueled Condition
ML19106A2512019-04-16016 April 2019
NRR E-mail Capture - Davis-Besse - Proposed License Condition and Draft Safety Evaluation for the License Amendment Request to Adopt NFPA 805
2024-08-07
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Sakai, Stacie From: Haskell, Russell ýY"'WX L Sent: Thursday, December 01, 2011 4:55 PM
Subject:
New OpE Forum Posting: DAVIS BESSE - CRACKS DISCOVERED IN SHIELD BUILDING DURING REACTOR VESSEL HEAD REPLACEMENT Follow Up Flag: Follow up Flag Status: Completed This email is being sent to notify recipients of a new posting on the (Operatina Experience Community Forum. Recipients are expected to review the posting for applicability to their areas of regulatory responsibility and consider appropriate actions. However, information contained in the posting is not tasking; therefore, no specific action or written response is required.
Information Security Reminder: OpE COMMs contain preliminary information in the interest of timely internal communication of operating experience. OpE COMMs may be pre-decisional and may contain sensitive/proprietary information. They are not intended for distribution outside the agency DAVIS BESSE - CRACKS DISCOVERED IN SHIELD BUILDING DURING REACTOR VESSEL HEAD REPLACEMENT (click link)
Summary On October 10, 2011 a crack was discovered in the units Shield Building wall. At time of discovery, licensee contractors were performing hydro-demolition activities to create a construction opening for replacement of the existing Reactor Vessel Closure Head. The crack thickness was characterized as very tight (<0.01 inch thick) and confined to the fluted area of the Shield Building. Davis Besse remains shutdown in MODE 5. Agency technical reviewers continue to evaluate licensee's structural calculations.
This COMM has been posted to the following communities: All Communications, Containment (leakage, degradation, cooling system performance), Emergency Preparedness, Flood Protection & Missiles, Inspection Programs,Materials/Aging,NaturalPhenomena, New Reactors, Power Uprate, Structural To unsubscribe from this distribution list or to subscribe to a different list on the OpE Community, please visit:
http://nrrl O.nrc..qov/rps/dyn/subscriptionl .cfm For more information on the Reactor OpE Program, please visit our Reactor OpE Gateway.
Thank you for reviewing and using Operating Experience.
Russell S. Haskell II United States Nuclear Regulatory Commission (NRC)
Reactor Systems Engineer (NRR/DIRS/IOEB)
Russell.Haskellk.nrc.pov I 301.415.1129 1 O-7H23
