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| ==Subject:== | | ==Subject:== |
| Diablo Canyon additional request for additional information: Exigent License Amendment Request for application to provide a new Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G (EPID: L-2020-LLA-0176) | | Diablo Canyon additional request for additional information: Exigent License Amendment Request for application to provide a new Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G (EPID: L-2020-LLA-0176) |
| By letter dated August 12, 2020 (Agencywide Documents Access and Management System (ADAMS) | | By {{letter dated|date=August 12, 2020|text=letter dated August 12, 2020}} (Agencywide Documents Access and Management System (ADAMS) |
| Accession No. ML20225A303), Pacific Gas and Electric Company (PG&E or the licensee) requested changes to the Technical Specifications (Appendix A to Facility Operating License Nos. DPR 80 and DPR- | | Accession No. ML20225A303), Pacific Gas and Electric Company (PG&E or the licensee) requested changes to the Technical Specifications (Appendix A to Facility Operating License Nos. DPR 80 and DPR- |
| : 82) for the Diablo Canyon Nuclear Power Plant (Diablo Canyon), Units 1 and 2. The proposed amendments would avoid an unnecessary plant shutdown during the expected time needed to perform potential repairs to the Unit 1 auxiliary feedwater system (AFW) piping that PG&E conservatively anticipates may be identified during Diablo Canyon, Unit 1, Cycle 22, planned upcoming inspections to the AFW system. The NRC staff has reviewed the license amendment request (LAR) and determined that additional information is required to complete the review. The NRC staff has sent requests for additional information (RAIs) on August 14, 2020, and August 17, 2020. The NRC staffs additional RAI is listed below. The staff may have additional RAIs. The staff sent the draft additional RAI to the PG&E staff and had a clarification conference call on August 19, 2020. The PG&E staff requested, and NRC agreed, to a RAI response by August 20, 2020. | | : 82) for the Diablo Canyon Nuclear Power Plant (Diablo Canyon), Units 1 and 2. The proposed amendments would avoid an unnecessary plant shutdown during the expected time needed to perform potential repairs to the Unit 1 auxiliary feedwater system (AFW) piping that PG&E conservatively anticipates may be identified during Diablo Canyon, Unit 1, Cycle 22, planned upcoming inspections to the AFW system. The NRC staff has reviewed the license amendment request (LAR) and determined that additional information is required to complete the review. The NRC staff has sent requests for additional information (RAIs) on August 14, 2020, and August 17, 2020. The NRC staffs additional RAI is listed below. The staff may have additional RAIs. The staff sent the draft additional RAI to the PG&E staff and had a clarification conference call on August 19, 2020. The PG&E staff requested, and NRC agreed, to a RAI response by August 20, 2020. |
Latest revision as of 21:35, 20 March 2021
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MONTHYEARRS-20-011, Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems, and Components for Nuclear Power Reactors2020-01-31031 January 2020 Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems, and Components for Nuclear Power Reactors Project stage: Request RS-20-009, Application to Revise LaSalle County Station Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b2020-01-31031 January 2020 Application to Revise LaSalle County Station Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b Project stage: Request ML20066F5622020-03-0606 March 2020 NRR E-mail Capture - LaSalle County Station, Units 1 and 2 - Acceptance of Requested Licensing Action License Amend Request - Risk-Informed Categorization and Treatment of Structure, Systems, and Components Project stage: Acceptance Review ML20090F6162020-03-30030 March 2020 NRR E-mail Capture - LaSalle Units 1 and 2, EPID-L-2020-LLA-0017 License Amendment Request 10 CFR 50.69, Audit Plan Project stage: Other ML20159A0032020-06-11011 June 2020 Supplement to the Audit Plan in Support of Staff Review of LAR to Adopt 10 CFR 50.69 Project stage: Approval ML20231A2372020-08-17017 August 2020 NRR E-mail Capture - Diablo Canyon Additional Request for Additional Information: Exigent License Amendment Request for Application to Provide a New Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G EPID: L-2020-LLA-017 Project stage: RAI ML20234A2422020-08-20020 August 2020 NRR E-mail Capture - Diablo Canyon Additional Request for Additional Information: Exigent License Amendment Request for Application to Provide a New Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G EPID: L-2020-LLA-017 Project stage: RAI ML20231A6522020-08-24024 August 2020 Summary of Teleconference with Pacific Gas & Electric Company Regarding an Exigent Amendment Request to Modify Diablo Canyon Power Plant, Units 1 & 2, Technical Specification 3.7.5, Auxiliary Feedwater (AFW) System EPID L-2020-LLA-017 Project stage: Meeting ML20240A2182020-09-0303 September 2020 Request for Additional Information Regarding Amendment Request for Amendments to Renewed Facility Operating Licenses to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems, and Co Project stage: RAI ML20253A3422020-09-17017 September 2020 Correction to Request for Additional Information Request to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems, and Components for Nuclear Power Reactors (EPID-2020-LLA-0017) Project stage: RAI ML20248H4942020-09-21021 September 2020 Regulatory Audit Summary Regarding License Amendment Requests to Adopt 10 CFR 50.69 and Permit Use of Risk-Informed Completion Times in Accordance with TSTF-505, Revision 2 Project stage: Other ML20247J4082020-09-29029 September 2020 Apla Request for Additional Information LAR 50.69 and TSTF-505 (Epids L-2020-LLA-0017) and Project stage: RAI RS-20-133, Response to Request for Additional Information Re License Amendment Request to Renewed Facility Operating Licenses to Adopt 10 CFR 50.692020-10-16016 October 2020 Response to Request for Additional Information Re License Amendment Request to Renewed Facility Operating Licenses to Adopt 10 CFR 50.69 Project stage: Response to RAI RS-20-136, Response to Request for Additional Information Re License Amendment Requests for Amendments to Renewed Facility OL to Adopt 10CFR50.69 & to Adopt TSTF-505, Rev. 2 (EPID L-2020-LLA-0017 and EPID-L-2020-LLA-0018)2020-10-29029 October 2020 Response to Request for Additional Information Re License Amendment Requests for Amendments to Renewed Facility OL to Adopt 10CFR50.69 & to Adopt TSTF-505, Rev. 2 (EPID L-2020-LLA-0017 and EPID-L-2020-LLA-0018) Project stage: Response to RAI ML20346A1042020-12-11011 December 2020 NRR E-mail Capture - LaSalle County Station, Units 1 and 2 - Request for Additional Information Regarding the License Amendment Request to Adopt 10 CFR 50.69 Project stage: RAI ML21022A1302021-01-22022 January 2021 Response to Request for Additional Information Regarding the License Amendment Request to Adopt 10 CFR 50.69 Project stage: Response to RAI ML21082A4222021-05-27027 May 2021 Issuance of Amendment Nos. 249 and 235 to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems, and Components for Nuclear Power Reactors Project stage: Approval 2020-08-17
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Category:E-Mail
MONTHYEARML23334A0912023-11-30030 November 2023 NRR E-mail Capture - Diablo Canyon 1 and 2 - Audit Questions for License Amendment Associated with TSTF-505, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b ML23335A1012023-11-0606 November 2023 OEDO-23-00350-NRR - Screen-in Email - 10 CFR 2.206 Petition from Mother'S for Peace and Change.Org Regarding Diablo Canyon ML23306A0422023-11-0202 November 2023 NRR E-mail Capture - Acceptance Review Diablo Canyon Request to Adopt 10 CFR 50.69, risk-informed Categorization and Treatment of SSCs ML23230A0702023-08-18018 August 2023 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request to Revise Technical Specifications to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times RITSTF Initiative 4b ML23165A2702023-06-14014 June 2023 NRR E-mail Capture - Acceptance Review - Diablo Canyon Revision to the Unit 1 Reactor Vessel Material Surveillance Program Withdrawal Schedule ML23157A2392023-06-0505 June 2023 Limited Appearance Statement from Nina Babiarz in the Matter of the Diablo Canyon ISFSI License Renewal Application ML23096A1792023-04-0606 April 2023 NRR E-mail Capture - Request for Additional Information Diablo Canyon Exemption Request Regarding Senior Reactor Operator License Application ML23094A1032023-04-0404 April 2023 NRR E-mail Capture - Acceptance Review - Diablo Canyon Exemption Request Regarding Senior Reactor Operator License Application ML23076A0932023-03-16016 March 2023 16-2023 Email - Estimate of Spent Nuclear Fuel in Tons ML23067A0202023-03-0808 March 2023 NRR E-mail Capture - Diablo Canyon Nuclear Power Plant Evacuation Time Estimate Analysis Review ML23046A1132023-02-13013 February 2023 Transmittal Email, Paul Bessette to Gibson, 2/13/23, Filing of Formal Opposition to PG&E Exemption Request ML23046A1042023-02-13013 February 2023 Transmittal Email, Diane Curran to Gibson, 2/13/23, Filing of Formal Opposition to PG&E Exemption Request ML23052A2042023-01-10010 January 2023 E-mail from Paul Bessette Dated 01/10/2023 Regarding Diablo Canyon ML22326A1632022-11-21021 November 2022 Licensee Comment Email on Post-Shutdown Emergency Plan Amendment ML22266A0012022-09-22022 September 2022 (External Sender) E-Mail Diablo Canyon Power Plant, Unit Nos. 1 and 2 - Total Amount of Spent Nuclear Fuel Stored in Tons ML22241A1142022-08-29029 August 2022 NRR E-mail Capture - Acceptance Review - Diablo Canyon Application to Revise Technical Specifications to Adopt TSTF-569, Revision of Response Time Testing Definitions ML22194A8872022-07-11011 July 2022 September 2022 Emergency Preparedness Exercise Inspection - Request for Information Email ML22187A2652022-07-0606 July 2022 NRR E-mail Capture - Request for Additional Information: Diablo Canyon Exemption Request for Part 73 force-on-force Training Due to COVID-19 ML22105A0702022-04-15015 April 2022 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request to Revise Technical Specifications to Adopt TSTF 577, Revised Frequencies for Steam Generator Tube Inspections ML22090A0832022-03-31031 March 2022 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request for Approval of a Certified Fuel Handler Training and Retraining Program ML22089A1672022-03-29029 March 2022 Email - Acknowledgement of NRC Receipt of Diablo Canyon ISFSI Renewal Application ML22087A0412022-03-25025 March 2022 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request for Approval of Alternative Security Measures for Early Warning System ML22061A2192022-03-0202 March 2022 NRR E-mail Capture - Request for Additional Information - Diablo Canyon Proposed Changes to Emergency Plan for post-shutdown and Permanently Defueled Condition ML21323A0652021-11-19019 November 2021 NRR E-mail Capture - Acceptance Review - Diablo Canyon Revision of Emergency Plan for post-shutdown Condition ML21264A6722021-09-21021 September 2021 NRR E-mail Capture - Revised Schedule: Diablo Canyon Request to Revise Technical Specification to Reflect the Permanent Cessation of Reactor Operation ML21215A3432021-08-0303 August 2021 NRR E-mail Capture - Request for Additional Information - Diablo Canyon Request to Revise Technical Specification 3.8.1, AC Sources - Operating to Support Diesel Fuel Oil Transfer System Component Planned Maintenance ML21189A0462021-07-0707 July 2021 NRR E-mail Capture - Draft Request for Additional Information - Diablo Canyon Emergency Amendment Request to Revise Technical Specification 3.7.8, Auxiliary Saltwater (Asw) System ML21188A0382021-07-0707 July 2021 (External_Sender) DCPP Draft Emergency LAR - Asw DCL-21-046, Email for Emergency LAR for TS 3.7.8, Auxiliary Saltwater (Asw) System2021-07-0707 July 2021 Email for Emergency LAR for TS 3.7.8, Auxiliary Saltwater (Asw) System ML21189A0662021-07-0707 July 2021 NRR E-mail Capture - Additional Draft Request for Additional Information - Diablo Canyon Emergency Amendment Request to Revise Technical Specification 3.7.8, Auxiliary Saltwater (Asw) System ML21189A0442021-07-0707 July 2021 NRR E-mail Capture - Request for Additional Information - Diablo Canyon Emergency Amendment Request to Revise Technical Specification 3.7.8, Auxiliary Saltwater (Asw) System ML21124A0612021-05-0404 May 2021 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request to Revise Technical Specification 3.8.1, AC Sources - Operating to Support Diesel Fuel Oil Transfer System Component Planned Maintenance ML21104A3642021-04-14014 April 2021 NRR E-mail Capture - Request for Additional Information - Diablo Canyon Proposed Technical Specifications and Revised License Conditions for the Permanently Defueled Condition ML21062A0642021-03-0202 March 2021 NRR E-mail Capture - Request for Additional Information for Diablo Canyon Generic Letter 2004-02 Submittal (L-2017-LRC-0000) ML21054A3112021-02-23023 February 2021 NRR E-mail Capture - Acceptance Review: Diablo Canyon Request for One-Time Exemption from Select 10 CFR 55.59 Requirements ML21012A4432021-01-12012 January 2021 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request to Revise Technical Specification to Reflect the Permanent Cessation of Reactor Operation ML20328A3002020-11-23023 November 2020 Email from Cgnp to the NRC - Comment Diablo Canyon Nuclear Power Plant, Units 1 and 2 - Dcdep Public Meeting - November 24, 2020 ML20329A0692020-11-23023 November 2020 NRR E-mail Capture - Request for Additional Information: Diablo Canyon COVID-19 Exemption Request to Extend force-on-force Exercise ML20323A4532020-11-18018 November 2020 NRR E-mail Capture - Request for Additional Information: Diablo Canyon COVID-19 Exemption Request to Extend Firearms Requalification ML20261H4232020-09-17017 September 2020 NRR E-mail Capture - Request for Additional Information: Diablo Canyon Unit 2 Fall 2019 Steam Generator Tube Inspection Report ML20239A9492020-08-26026 August 2020 (External Sender) E-Mail Comment by D. Lochbaum Regarding Diablo Canyon Unit 1 AFW System Piping ML20239A7282020-08-24024 August 2020 (External-Sender) E-mail Comments on No Significant Hazards Determination for Diablo Canyon LAR ML20239A7752020-08-24024 August 2020 (External-Sender) E-mail Comments on No Significant Hazards Determination for Diablo Canyon LAR ML20240A2302020-08-23023 August 2020 (External-Sender) E-mail Public Comment by D. Lochbaum Regarding Diablo Canyon Safety Issue ML20234A2422020-08-20020 August 2020 NRR E-mail Capture - Diablo Canyon Additional Request for Additional Information: Exigent License Amendment Request for Application to Provide a New Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G EPID: L-2020-LLA-017 ML20233A8592020-08-19019 August 2020 Mothers for Peace Public Comment on Exigent LAR to Modify TS 3.7.5, Auxiliary Feedwater System ML20233A3222020-08-18018 August 2020 Comment (4) e-mail from D. Lochbaum Regarding Diablo Canyon Exigent LAR ML20231A2372020-08-17017 August 2020 NRR E-mail Capture - Diablo Canyon Additional Request for Additional Information: Exigent License Amendment Request for Application to Provide a New Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G EPID: L-2020-LLA-017 ML20232C6482020-08-17017 August 2020 Lochbaum Public Comment 1 on Exigent LAR to Modify TS 3.7.5, Auxiliary Feedwater System ML20230A0732020-08-14014 August 2020 NRR E-mail Capture - Diablo Canyon Request for Additional Information: Exigent License Amendment Request for Application to Provide a New Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G 2023-08-18
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Text
From: Lee, Samson Sent: Thursday, August 20, 2020 2:28 PM To: Richardson, Michael
Subject:
Diablo Canyon additional request for additional information: Exigent License Amendment Request for application to provide a new Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G (EPID: L-2020-LLA-0176)
By letter dated August 12, 2020 (Agencywide Documents Access and Management System (ADAMS)
Accession No. ML20225A303), Pacific Gas and Electric Company (PG&E or the licensee) requested changes to the Technical Specifications (Appendix A to Facility Operating License Nos. DPR 80 and DPR-
- 82) for the Diablo Canyon Nuclear Power Plant (Diablo Canyon), Units 1 and 2. The proposed amendments would avoid an unnecessary plant shutdown during the expected time needed to perform potential repairs to the Unit 1 auxiliary feedwater system (AFW) piping that PG&E conservatively anticipates may be identified during Diablo Canyon, Unit 1, Cycle 22, planned upcoming inspections to the AFW system. The NRC staff has reviewed the license amendment request (LAR) and determined that additional information is required to complete the review. The NRC staff has sent requests for additional information (RAIs) on August 14, 2020, and August 17, 2020. The NRC staffs additional RAI is listed below. The staff may have additional RAIs. The staff sent the draft additional RAI to the PG&E staff and had a clarification conference call on August 19, 2020. The PG&E staff requested, and NRC agreed, to a RAI response by August 20, 2020.
The NRC staff considers that timely responses to RAIs help ensure sufficient time is available for staff review and contribute toward the NRCs goal of efficient and effective use of staff resources. Please note that if you do not respond to this request by the agreed-upon date or provide an acceptable alternate date, we may deny your application for amendment under the provisions of Title 10 of the Code of Federal Regulations, Section 2.108. If circumstances result in the need to revise the agreed upon response date, please contact me at (301) 415-3168 or via e-mail Samson.Lee@nrc.gov.
Background:
When in proposed Condition G in Technical Specification (TS) 3.7.5, steam generator (SG) 1-2 will be isolated from AFW, but the SG 1-2 will continue to be used for power generation. The accident analysis for Steam Generator Tube Rupture (SGTR) is addressed in Updated Final Safety Analysis Report (UFSAR)
Section 15.4.3. An important consideration in the accident consequence analysis is to identify the SG with the ruptured SG and isolate that SG. The analysis states that in the event of an SGTR, the plant must diagnose the SGTR and perform the required recovery actions to stabilize the plant and terminate the primary to secondary leakage. The major operator actions include identification and isolation of the ruptured SG , cool down and depressurization of the RCS to restore inventory, and termination of safety injection to stop primary to secondary leakage. The specific actions for detection are described in Item (1), which partially states: The AFW flow will begin to refill the SGs, distributing equal flow to the SGs.
Since primary to secondary leakage adds additional liquid inventory to the ruptured SG, the water level will return to narrow range earlier in that SG and will continue to increase more rapidly. This response, as indicated by the SG water level instrumentation, provides confirmation of an SGTR event and also identifies the ruptured SG.
RAI:
When in proposed Condition G of TS 3.7.5, if a SGTR were to occur in the isolated SG, provide a discussion of the impact on the SGTR accident analysis in UFSAR Section 15.4.3, with emphasis on how operator actions to detect and isolate the SG may change.
Hearing Identifier: NRR_DRMA Email Number: 744 Mail Envelope Properties (DM8PR09MB61836DFDE4DFAA75603799F49A5A0)
Subject:
Diablo Canyon additional request for additional information: Exigent License Amendment Request for application to provide a new Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G (EPID: L-2020-LLA-0176)
Sent Date: 8/20/2020 2:28:10 PM Received Date: 8/20/2020 2:28:10 PM From: Lee, Samson Created By: Samson.Lee@nrc.gov Recipients:
"Richardson, Michael" <MJRm@pge.com>
Tracking Status: None Post Office: DM8PR09MB6183.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 3504 8/20/2020 2:28:10 PM Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: