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Category:E-Mail
MONTHYEARML24249A1362024-09-0404 September 2024 EN 57304 - Westinghouse Electric Company, LLC, Final Report - No Embedded Files. Notification of the Potential Existence of Defects Pursuant to 10 CFR Part 21 ML24155A0882024-05-30030 May 2024 Email Summary of Verbal Authorization 1RR06 ML24150A3342024-05-29029 May 2024 Official RCIs for Susquehanna Proposed Alternative 1RR06 ML24087A0672024-04-22022 April 2024 Email to Melisa Krick Regarding Exemption Decision for Susquehanna ML24087A0682024-04-17017 April 2024 Email to Melisa Krick Regarding Availability of Environmental Assessment for the Susquehanna Exemption ML24106A0672024-04-12012 April 2024 State of Pennsylvania Input Review of Draft EA for Exemption Request for Susquehanna, Units 1 and 2 ML24103A0012024-04-11011 April 2024 – Summary of Verbal Authorization of 4RR-11 ML24102A1252024-04-10010 April 2024 Request for Additional Information for Susquehanna, Unit 1 Alternative Request 4RR-11 ML24106A0662024-04-10010 April 2024 Request for State Review of Draft EA for an Exemption Request for Susquehanna, Units 1 and 2 ML24082A0922024-03-21021 March 2024 Confirmation Email 3-21-2024 Regarding Exemption Request for Future Loading Only at Susquehanna ML24047A1232024-02-14014 February 2024 NRC Consultation with Commonwealth of PA Proposed NSHC for Susquehanna LAR TSTF-568 and TSF-563 Email ML24029A2732024-01-29029 January 2024 NRC Consultation with Commonwealth of Pennsylvania Re Proposed NSHC for Susquehanna License Amendment Request ML23352A2542023-12-18018 December 2023 NRC LIC-109 Acceptance Review Results for Susquehanna Steam Electric Station, License Amendment Request to Revise Technical Specifications (TS) to Adopt TSTF-568 ML23345A0542023-12-0808 December 2023 Email - NRC LIC-109 Acceptance Review Results for Susquehanna License Amendment Request to Revise Technical Specifications to Adopt TSTF-563 ML23334A1682023-11-30030 November 2023 NRC Request for Additional Information Re. Susquehanna Relief Request RR-01 ML23334A1502023-11-30030 November 2023 NRC Request for Additional Information Re. Susquehanna Relief Request RR-02 ML23242A2832023-08-30030 August 2023 NRR E-mail Capture - NRC LIC-109 Acceptance Review Results for Susquehanna Steam Electric Station, Proposed Alternatives RR01 and RR02 (EPIDs L-2023-LLR-0043 and -0044) ML23230A0712023-08-18018 August 2023 NRR E-mail Capture - NRC LIC-109 Acceptance Review Results for Susquehanna Steam Electric Station, Proposed Alternative for Valve 251130 ML23188A0802023-07-0707 July 2023 NRR E-mail Capture - NRC LIC-109 Acceptance Review Results for Susquehanna Steam Electric Station, License Amendment Request to Revise Control Rod Technical Specifications ML23171A4312023-06-20020 June 2023 NRR E-mail Capture - NRC LIC-109 Acceptance Review Results for Susquehanna Steam Electric Station, Proposed Alternative 5RR-02 ML23103A4702023-04-12012 April 2023 NRR E-mail Capture - Susquehanna Unit 2 - Verbal Authorization of Relief Request 4RR-10 ML23094A1242023-03-31031 March 2023 EN 56387 Update - Paragon Energy Solutions Final Notification of Defect of Automatic Transfer Switch ML23075A0492023-03-16016 March 2023 NRR E-mail Capture - Notification to the State of Pennsylvania Re. Susquehanna Steam Electric Station, Units 1 and 2 - Indirect License Transfer and Draft Conforming Amendments ML23073A1202023-03-14014 March 2023 NRR E-mail Capture - Evacuation Time Estimate Review ML23013A2082023-01-13013 January 2023 Request for Additional Information ML23012A0012023-01-11011 January 2023 NRC Notification to the State of Pennsylvania Re. Emergency Amendment Control Rod Technical Specifications ML22293A0882022-10-20020 October 2022 NRR E-mail Capture - NRC LIC-109 Acceptance Review Results for Susquehanna License Transfer ML22257A1942022-09-14014 September 2022 NRR E-mail Capture - NRC Notification to the State of Pennsylvania Re. Susquehanna Steam Electric Station, Units 1 and 2 Amendment - Relocating Staff Qualification Requirements ML22213A2612022-08-0101 August 2022 NRR E-mail Capture - NRC Notification to the State of Pennsylvania Re. Susquehanna Steam Electric Station, Units 1 and 2 Amendment - Instrumentation and Control Technical Specifications ML22179A2902022-06-28028 June 2022 NRR E-mail Capture - NRC Notification to the State of Pennsylvania Re. Susquehanna Steam Electric Station, Units 1 and 2 Amendment - TSTF-505, Risk Informed Completion Times ML22146A0742022-05-25025 May 2022 NRR E-mail Capture - NRC Request for Additional Information - Susquehanna License Amendment Request ML22123A1112022-05-0303 May 2022 NRR E-mail Capture - NRC LIC-109 Acceptance Review Results for Susquehanna Steam Electric Station, License Amendment Request to Relocate Staff Qualifications ML22111A3132022-04-21021 April 2022 NRR E-mail Capture - NRC Request for Additional Information - Susquehanna License Amendment Request ML22084A0222022-03-25025 March 2022 NRR E-mail Capture - Susquehanna Atrium-11 LAR Audit Report ML22038A1062022-02-0404 February 2022 NRR E-mail Capture - Susquehanna Steam Electric Station, Units 1 and 2 - Acceptance of Requested Licensing Action Application to Revise Technical Specifications to Adopt TSTF-564, Safety Limit MCPR ML22005A0712021-12-21021 December 2021 NRR E-mail Capture - NRC LIC-109 Acceptance Review Results for Susquehanna 1 & 2 ECCS TS LAR ML21190A1702021-06-11011 June 2021 NRR E-mail Capture - NRC Notification to the State of Pennsylvania Regarding a Susquehanna Steam Electric Station, Unit 2 Amendment - Unit 1 Transformer Replacement ML21124A2022021-05-0404 May 2021 NRR E-mail Capture - Acceptance Review for Susquehanna TSTF-505 ML20343A3712020-12-0808 December 2020 NRR E-mail Capture - Corrected - Acceptance Review of Susquehanna RR 4RR-02 ML20343A3702020-12-0808 December 2020 NRR E-mail Capture - Acceptance Review of Susquehanna RR 4RR-02 ML20335A5732020-11-30030 November 2020 NRR E-mail Capture - Susquehanna -Acceptance Review Replacement of Unit 1 Transformers ML20283A7722020-10-0909 October 2020 Submittal of Pennsylvania Letter Requesting Exemption from Biennial Exercise Requirements for Pennsylvania Nuclear Power Plants in Calendar Year 2020 ML20261H4272020-09-17017 September 2020 NRR E-mail Capture - Corrected Acceptance Review for Susquehanna - Revise Technical Specifications to Adopt TSTF-582, Reactor Pressure Vessel Water Inventory Control (RPV WIC) Enhancements ML20261H4212020-09-16016 September 2020 NRR E-mail Capture - Corrected Acceptance Review for Susquehanna - Revise Technical Specifications to Adopt TSTF-582, Reactor Pressure Vessel Water Inventory Control (RPV WIC) Enhancements ML20195B1282020-07-13013 July 2020 NRR E-mail Capture - Acceptance Review for Susquehanna- Revise Technical Specifications to Adopt TSTF-529, Clarify Use and Application Rules (EPID L-2020-Lla-0139) ML20178A6502020-06-26026 June 2020 Acceptance Review for Susquehanna - Revise Technical Specification 3.8.1 to Create a New Condition for an Inoperable Manual Synchronization Circuit ML20028F6352020-01-28028 January 2020 NRR E-mail Capture - Acceptance Review of LAR to Revise the Dose Consequence Analysis for a Loss of Coolant Accident ML19319A0092019-11-14014 November 2019 NRR E-mail Capture - Draft RAI for SSES Units 1 and 2 LAR to Replace ESW Piping ML19319B1922019-11-14014 November 2019 NRR E-mail Capture - RAI for Susquehanna, 1 and 2 License Amendment Request - Replace the Emergency Service Water System and Residual Heat Removal Service Water System ML19234A0342019-08-19019 August 2019 Acceptance Review: Susquehanna Units 1 and 2 License Amendment Request for Advanced Framatome Methodologies for Atrium 11 2024-09-04
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Richard Guzman -Draft response to LOCA/LOOP questions Page 1 lFrom: "Coddington, Cornelius T" <ctc:oddington@pplweb.com>
To: "Richard Guzman" <RVG~nrc:.gov>
Date: 1/20/)6 1:14PM
Subject:
Draft response to LOCA/LOOP questions Rich Here are PPL's draft responses to the reviewers questions on LOCA/LOOP testing. Wednesday (1/25) or Thursday (1/26) of next week would be the best time for a phone call.Neil<<Response to e-mailed NRC Questions Rev 1.doc>>The information contain ed in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited.
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Draft response to questions on LOCA/LOOP testing Creation Date: 2/17/06 9:29AM From: "Coddington, Cornelius T" <ctcoddington@pplweb.com>
Created By: ctcoddington@pplweb.com Recipients nrc.gov owf4-po.OWFNDOD RVG (Richard Guzman)Post Office Route owf4_po.OWFNDO) nrc.gov Files Size Date & Time MESSAGE 774 02/17/06 09:29AM TEXT.htm 1470 PLA-zzzz.doc 47104 Mime.822 69098 Options Expiration Date: None Priority:
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Standard Response to NRC Questions on LOCA/LOOP TS Change Question: In support of their review of the subject amendment (PLA-5869), the Electrical Engineering Branch requests to have a discussion with your technical group. The questions are (1) wiy do two load groups have to be de-energized in order to perform SR 3.8.1.19.
Why can': one load group be d&-energized to perform the SR? (2) Do 2 EDGs have to be in an LCD to perform this SR?Response (1): It is possible to perform the LOCA/LOO]?
surveillance one load group at a time.However, testing in this manner does not adequately test the design of the plant as adverse interactions between the load groups would not be detectable.
The design of the plant for a LOCA/L1DOP relies upon the emergency diesel generators to all start and load onto their respective 4kV ESS bus in each Unit. Design features exist that preclude adverse interaction between any of the load groups. Testing a division (2 load groups) at the same time, verifies that that there is no adverse interaction between the 2 load groups.Response (2): During this testing, all emergency diesel generators (EGD) are operable.
Should an event occur the EDGs are capable of loading onto the required number of Unit 1 and Unit 2 (operating unit) buses and accepting the required loads.During the performance of the LOCA/LCOP surveillance, the following are the Unit 2 Technical Specification Impacts:* U2 TS 3.8.1,A C Sources Operating, Condition A -for loss of one offsite source since one of the two offsite sources' 4kV supply breakers are disabled.Action: Restore offsite source within 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />s* U2 TS 3.8.7, Distribution Systems Operating, -for the momentary loss of 2 Unit 1 4kV ESS Buses while they are being loaded onto the EDGs. Since there are no Conditions in TS 3.8.7 that apply to the loss of 2 Unit 1 4kV ESS Buses, LCO 3.0.3 is entered.Action: Enter LCO 3.0.3 (reason for Tech Spec change)* U2 TS 3.5.1, E]CCS-Operating, -(only during Division I testing) for the loss of one Core Spray loop on Unit 2. SSES is designed to withstand a LOCA simultaneous with a loss of offsite power assuming the most severe active single failure. This means the plant must withstand a LOCA on one unit combined with a Page 1 of 2 Response to NRC Questions on LOCA/LOOP TS Change (Continued) false or spurious LOCA signal on ihe non-accident unit. Interlocks between the Unit 1 and Unit 2 Core Spray Systems prevent electrical system overloads by limiting the rnumber of CS pumps that can start because of a LOCA/False LOCA signal.Any time a LOCA signal (low reactor water level or high drywell pressure combined with low reactor pressure) is generated in Unit 1, a trip signal is sent to Unit 2 CS pumps A and C. Similarly, if a LOCA signal is generated in Unit 2, Unit 1 CS pumps B and D receive a trip signal. The pumps receiving a trip signal are also prevented from starting.
Therefore, a LOCA in one unit and a false LOCA signal in non-accident unit will start A and C CS pumps on Unit 1 and the B and D CS pumps on Unit 2. A single LOCA signal on either unit will start all four CS pumps of the affected unit and will trip and prevent operation of two CS pumps of the unaffected unit.See FSAR Section 7.3.1.Ia.1.5 for a description of the Core Spray system instrumentation and controls.Action: Restore Core Spray Loop A within 7 days U2 TS 3.3.8.1, Loss of Power (LOP) Instrumentation, because the LOP instrumentation is jumpered out during the test.Action: Restore LOP instrumentation within one hour. (Reason for Tech Spec change)All other equipment needed to support Unit 2 operation remains operable during this surveillance test. In addition, the surveillance procedure provided guidance to the operator on restoring the systems should an event occur.Page 2 of 2