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Category:E-Mail
MONTHYEARML24250A0542024-09-0606 September 2024 LRA - Requests for Additional Information - Set 1 - Email from Brian Harris to Adam Peck ML24250A0502024-09-0606 September 2024 NRR E-mail Capture - Acceptance Review Diablo Canyon Revision to Technical Specification 5.5.16 for Permanent Extension of Type a and Type C Leak Rate Test Frequencies ML24235A2032024-08-22022 August 2024 OEDO-24-00083 - 10 CFR 2.206 - Diablo Canyon Units 1 and 2 Seismic - Final Determination e-mail - EPID L-2024-CRS-0000 ML24205A0622024-07-23023 July 2024 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request for Approval to Extend the Alternative for Use of Full Structural Weld Overlay ML24187A1382024-07-0202 July 2024 License Renewal Environmental Review: Summary of June 27 Clarification Call Regarding Pg&Es Response to RCI AQN-3 ML24184C0422024-07-0202 July 2024 NRR E-mail Capture - Request for Additional Information Diablo Canyon 50.69 risk-informed Categorization ML24149A0832024-05-28028 May 2024 Acceptance Review: Diablo Canyon Request for Alternative Security Measures and Exemption for the Early Warning System ML24145A0612024-05-22022 May 2024 Written Limited Appearance Statement of Doris Nassiry ML24136A1622024-05-15015 May 2024 OEDO-24-00083 (E-Mail) 10 CFR 2.206 - Diablo Canyon Power Plant, Unit Nos. 1 and 2 Seismic - Initial Assessment ML24134A1872024-05-10010 May 2024 Written Limited Appearance Statement of Charlene M. Woodcock ML24134A1902024-05-10010 May 2024 Written Limited Appearance Statement of Shelley Hamilton ML24122C6702024-04-29029 April 2024 Request from NRC Review of a Draft EA for an Exemption for the Limerick Generating Station ML24095A3172024-04-0404 April 2024 NRR E-mail Capture - Acceptance Review Diablo Canyon Request to Revise Technical Specification 5.6.6 for Pressure and Temperature Limits Report ML24088A2382024-03-28028 March 2024 10 CFR 2.206 - Diablo Canyon Units 1 and 2 OEDO-24-00083 - Screen-in e-mail L-2024-CRS-0000 ML24058A1032024-03-0808 March 2024 OEDO-23-00350-NRR - Initial Assessment - 10 CFR 2.206 Petition from Mothers for Peace and Friends of the Earth Regarding Diablo Canyon ML24071A1762024-03-0707 March 2024 Email - (External Sender) NRC Proceeding on Diablo Canyon 50-275 and 50-323 LR-2 ML24067A0902024-03-0505 March 2024 Email to Diane Curran from the Office of the Secretary, Assistant for Rulemaking and Adjudications, Russell Chazell ML24067A0892024-03-0505 March 2024 Email Response from Diane Curran to Office of the Secretary, Assistant for Rulemaking and Adjudications, Russell Chazell ML24067A0882024-03-0404 March 2024 Email Hearing Request from San Luis Obispo Mothers for Peace, Friends of the Earth, and Environmental Working Group ML24060A0022024-02-28028 February 2024 (External Sender) Pre-Sub Mittal EWS Participants List E-mail ML24045A1972024-02-0606 February 2024 Tribal Consultation Request ML24033A3062024-02-0101 February 2024 Dcisc 2-1-2024 Email: Comments by Mr. Bruce Severance at This Mornings Public Meeting Re Scope of Review for DCPP License Extension ML23334A0912023-11-30030 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 Mothers 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 ML23046A1042023-02-13013 February 2023 Transmittal Email, Diane Curran to Gibson, 2/13/23, Filing of Formal Opposition to PG&E Exemption Request ML23046A1132023-02-13013 February 2023 Transmittal Email, Paul Bessette 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 ML21188A0382021-07-0707 July 2021 (External_Sender) DCPP Draft Emergency LAR - Asw 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 2024-09-06
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1 DiabloCanyonNPEm Resource From: Ferrer, Nathaniel Sent: Friday, July 16, 2010 10:18 AM To: Grebel, Terence; Soenen, Philippe R Cc: DiabloHearingFile Resource
Subject:
Draft RAI Set 16 - AMR and AMP RAIs Attachments:
Draft RAI Set 16 AMR and AMP RAIs.docTerry and Philippe, Attached is Draft RAI Set 16 containing draft RAIs, specifically on portions of the aging management review and aging management programs. Please review the attached draft RAIs and let me know if and when you would like to have a teleconference call. The purpose of the call will be to obtain clarification on the staff's request.
Please let me know if you have any questions.
NathanielFerrerProjectManagerDivisionofLicenseRenewalOfficeofNuclearReactorRegulationU.S.NuclearRegulatoryCommission(301)415 1045 Hearing Identifier: DiabloCanyon_LicenseRenewal_NonPublic Email Number: 1948 Mail Envelope Properties (26E42474DB238C408C94990815A02F090A76E5A4DB)
Subject:
Draft RAI Set 16 - AMR and AMP RAIs Sent Date: 7/16/2010 10:18:14 AM Received Date: 7/16/2010 10:18:15 AM From: Ferrer, Nathaniel Created By: Nathaniel.Ferrer@nrc.gov Recipients: "DiabloHearingFile Resource" <DiabloHearingFile.Resource@nrc.gov> Tracking Status: None "Grebel, Terence" <TLG1@PGE.COM>
Tracking Status: None "Soenen, Philippe R" <PNS3@PGE.COM> Tracking Status: None
Post Office: HQCLSTR01.nrc.gov Files Size Date & Time MESSAGE 594 7/16/2010 10:18:15 AM Draft RAI Set 16 AMR and AMP RAIs.doc 51706
Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received:
Diablo Canyon Nuclear Power Plant, Units 1 and 2 (DCPP) License Renewal Application (LRA) Draft Request for Additional Information Set 16 Aging Management Review/Aging Management Programs D-RAI 3.2.2.3.4-1 The GALL Report, under item VII.G-9, indicates that copper alloy piping, piping components and piping elements exposed to condens.ation (internal) results in a loss of material, pitting and crevice corrosion, and the applicant should implement a plant specific aging management program to manage the aging effect.
The Diablo Canyon LRA Table 3.2.2-4 indicates that the copper alloy heat exchanger tube components are exposed to plant indoor air (internal). The LRA Table 3.2.2-4 also indicates that the copper alloy >15%Zn valve components are exposed to internal ventilation atmosphere and that the copper alloy >15%Zn valve components are exposed to internal plant indoor air.
For each of the three component/environment scenarios, the LRA uses Note G, along with a plant-specific note that states "Condensation can occur but rarely. Component surfaces are normally dry". LRA Table 3.0-1 defines plant indoor air and ventilation atmosphere as "evaluated with the NUREG-1801 environment of condensation when the air contains significant amounts of moisture (enough to cause loss of material)". Since there is no aging management program assigned to these components, it is not clear how the applicant will monitor to ensure that condensation does not form.
Provide additional information to indicate that the moisture level is being monitored in these systems to ensure that condensation does not form or provide prior historical evidence that would show that condensation does not occur with these components and environmental conditions.
D-RAI B.2.1.18-2 The license renewal application (LRA) states th at Aging Management Program (AMP) B.2.1.18, Buried Piping and Tanks Inspection Program, is a new program with 2 exceptions and no enhancements and is consistent with the program elements in GALL AMP XI.M34. This AMP addresses buried piping, (i.e., piping in direct contact with soil). The LRA also states that AMP B.2.1.20, External Surfaces Monitoring Program, is a new program with 3 exceptions and no enhancements and is consistent with the program elements in GALL AMP XI.M36. This AMP addresses aging management of the external surfaces of piping exposed to air, which would normally include underground inaccessible piping (i.e., piping not in direct contact with soil, but located below grade in a vault, pipe chase, or other structure where it is exposed to air and where access is limited).
There have been a number of recent industry events involving leakage from buried and underground piping and tanks.
In light of this recent industry Operating Experience (OE), the staff is concerned about the possible susceptibility to failure of buried and/or underground piping that are within the scope of 10 CFR 54.4 and subject to aging management for license renewal. In reviewing the AMPs cited above along with the applicable aging management review (AMR) items associated with them, the staff is not clear whether: (1) the components addressed by these AMPs clearly include both buried and underground piping (piping which is below grade and contained in a vault or other structure where it is exposed to air and where access is limited); and (2) whether such programs are being updated to incorporate lessons learned from these recent events as well as any OE from the applicant's own history.
- 1. Provide a discussion of how or whether the AMPs used in managing the aging of buried, underground, and limited access piping and tanks within the scope of license renewal will address recent industry OE as well as any OE from the applicant's own history. 2. If there are proposed changes as a result of the review of recent industry operating experience related to buried pipe, state how many excavations will be conducted during the ten year period prior to extended operation and in the period following the period of extended operation and minimum length of piping that will be exposed. State what percentage of the total length of piping these excavations will reveal. 3. If any proposed changes entail other methods of examining the pipe than excavations and direct visual inspection of the coating and/or piping surface, state what those methods will be and state what percentage of the total length of piping will be examined. 4. For the following in scope systems, provide a discussion on whether cathodic protection will be provided for each and the extent of cathodic protection. Provide a discussion of the testing of the cathodic protection used since the pipe was first buried:
Saltwater & Chlorination 3.3.2-3 Make-up Water 3.3.2-5 Fire Protection 3.3.2-12 Diesel Fuel Oil 3.3.2-13
D-RAI B2.1.37-1 With respect to LRA Nickel-Alloy Aging Management Program element 5 - monitoring and trending, verify that volumetric and/or surface examinations will be performed in accordance with MRP-139 for reactor vessel inlet and outlet nozzles, as identified in the program description of this AMP.