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| | number = ML18250A310 | | | number = ML18250A310 |
| | issue date = 08/01/2018 | | | issue date = 08/01/2018 |
| | title = Draft RAI - RBS EP EAL Scheme Change LAR (L-2018-LLA-0130) | | | title = NRR E-mail Capture - Draft RAI - RBS EP EAL Scheme Change LAR (L-2018-LLA-0130) |
| | author name = Regner L | | | author name = Regner L |
| | author affiliation = NRC/NRR/DORL/LPLIV-1 | | | author affiliation = NRC/NRR/DORL/LPLIV-1 |
Latest revision as of 03:51, 2 December 2019
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Category:E-Mail
MONTHYEARML24137A2702024-05-16016 May 2024 NRR E-mail Capture - Entergy Fleet - Acceptance Review of License Amendment Request to Remove Obsolete License Conditions from Operating Licenses for GGNS, RBS, and WF3 (L-2024-LLA-0062) ML24088A0092024-03-27027 March 2024 NRR E-mail Capture - Entergy Fleet - Final Request for Confirmation of Information (RCI) Re Alternative Request EN-RR-22-001 Concerning ASME Code Case N-752 (L-2022-LLR-0054) ML23348A1222023-12-14014 December 2023 NRR E-mail Capture - Grand Gulf, River Bend, and Waterford, Unit 3 - 2nd Round of Official RAIs for RR EN-RR-22-001, Use ASME Code Case N-752, Risk Informed Categorization for Class 2 and 3 Systems ML24031A2772023-11-27027 November 2023 (05000458/2024040) IP 95001 Regarding EA-23-071 Initial Request for Information ML24102A2442023-09-22022 September 2023 NRR E-mail Capture - Audit Question TSTF-505 and 50.69 ML23240A3412023-08-28028 August 2023 NRR E-mail Capture - ANO-2, Grand Gulf, and River Bend - Acceptance Review of LAR Revising TSs to Adopt TSTF-205, Revision of Channel Calibration, Channel Functional Test, and Related Definitions ML23207A0762023-07-14014 July 2023 EN 56557 - Update to Part 21 Report Re Potential Defect with Trane External Auto/Stop Emergency Stop Relay Card Pn: XI2650728-06 ML23159A0052023-06-0505 June 2023 56557-EN 56557 - Paragon - Redlined ML23116A1462023-04-26026 April 2023 NRR E-mail Capture - Entergy Fleet (Grand Gulf and River Bend) - Final RAI for Request to Update ASME Code Relief Request Safety Evaluations with NRC-Approved Revision of BWRVIP Guidelines (GG-ISI-020, and RBS-ISI-019) ML23103A4662023-04-0404 April 2023 NRR E-mail Capture - River Bend Station, Unit 1 - Acceptance Review for LAR to Adopt TSTF-505, Rev. 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b ML23103A4672023-04-0404 April 2023 NRR E-mail Capture - River Bend Station, Unit 1 - Acceptance Review for LAR to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors ML23089A0702023-03-29029 March 2023 TSTF-505 Email Providing Reference for 0.3g HCLPF Value ML23072A3672023-03-0909 March 2023 NRR E-mail Capture - Entergy Fleet - Acceptance Review of Quality Assurance Program Manual Reduction in Commitment ML23009B6912023-01-0909 January 2023 NRR E-mail Capture - Grand Gulf, Unit 1 and River, Unit 1 - Acceptance of Requested Licensing Action Request to Update ASME Code RR SE with NRC-Approved Revision of BWRVIP Guidelines ML22206A0152022-07-21021 July 2022 NRR E-mail Capture - Entergy (Grand Gulf, River Bend, and Waterford-3) - Acceptance Review of the RR EN-RR-22-001, Case N-752, Risk-informed Cat & Treatment for Repair/Replacement Activities in Class 2 & 3 Systems ML22173A0372022-06-21021 June 2022 NRR E-mail Capture - Entergy (Grand Gulf and River Bend) - Acceptance Review of the License Amendment Request to Revise Technical Specifications to Adopt TSTF-580, Provide Exception from Entering Mode 4 with No Operable RHR Shutdown Cooling ML21356A5882021-12-22022 December 2021 NRR E-mail Capture - Acceptance for Review: River Bend Station 1 - IST Program Relief Request for PIV Testing Frequency ML21312A4792021-11-0505 November 2021 Email: NRC Staff Preliminary Questions Regarding X Energy LLC Xe-100 Topical Report: Risk-Informed Performance-Based Licensing Basis Development ML21308A5602021-11-0404 November 2021 NRR E-mail Capture - Arkansas Nuclear One, Units 1 and 2, Grand Gulf, River Bend, and Waterford, Unit 3 - Acceptance Review of LAR to Adopt TSTF-554, Revise Reactor Coolant Leakage Requirements ML21292A0112021-10-18018 October 2021 NRR E-mail Capture - ANO, 1 and 2, Grand Gulf, River Bend, Waterford, 3 - Acceptance Review of LAR to Adopt TSTF-541, Add Exceptions to Surveillance Requirements for Valves and Dampers Locked in the Actuated Position ML21218A0412021-07-19019 July 2021 NRR E-mail Capture - River Bend Unit 1 - Acceptance of License Amendment Request to Add License Condition Concerning Receipt, Possession ML21174A0342021-06-22022 June 2021 NRR E-mail Capture - Entergy Fleet (ANO, Ggulf, Rbend, & Waterford) - Acceptance Review for Relief Request to Use a Provision of a Later Edition of the ASME Code, Section XI for Periodic System Pressure Tests Exemptions ML21109A2142021-04-19019 April 2021 NRR E-mail Capture - Entergy Fleet (Grand Gulf and River Bend) - Rev. Est Hours for Review of Relief Request (RR) - ASME Code RR Safety Eval with NRC-Approved Rev of BWRVIP Guidelines (GG-ISI-020 and RBS-ISI-019) ML21099A0312021-03-30030 March 2021 Email 3-30-2021 - Request for Information_ RBS EP Exercise Inspection (Week of 5_10_2021) ML21109A2132021-03-23023 March 2021 NRR E-mail Capture - Entergy Fleet (Grand Gulf and River Bend) - Relief Request (RR) Associated with ASME Code RR Safety Evaluations with NRC-Approved Revision of BWRVIP Guidelines (GG-ISI-020 and RBS-ISI-019) ML21068A4092021-03-0909 March 2021 NRR E-mail Capture - Entergy Fleet (GGNS and RBS) -Approval of TSTF-501 LAR, Relocate Sored Fuel Oil and Lube Oil Volume Values to Licensee Control ML21022A1692021-01-22022 January 2021 NRR E-mail Capture - Entergy Fleet (ANO, Grand Gulf, River Bend, and Waterford) - Acceptance Review for RR EN-20-RR-003, Proposed Alternative to Use ASME Code Case N-711-2 ML21015A3452021-01-14014 January 2021 NRR E-mail Capture - Grand Gulf and River Bend - Revised Estimated Hours for Relief Request Associated with ASME Code RR SEs with NRC-Approved Revision of BWRVIP Guidelines (GG-ISI-020 and RBS-ISI-019) ML20337A1382020-11-23023 November 2020 Acceptance of License Amendment Request to Adopt GL 86-10 Standard License Condition for Fire Protection ML20329A1442020-11-20020 November 2020 Terrapower QAPD Preliminary Questions Email ML20317A2922020-10-15015 October 2020 Entergy Operations, Inc. (River Bend Station, Unit 1) - Acceptance Review of License Amendment Request to Revise Technical Specifications to Adopt TSTF-582, Reactor Pressure Vessel Water Inventory Control (RPV WIC) Enhancements ML20289A3542020-10-14014 October 2020 NRR E-mail Capture - Entergy Fleet (Grand Gulf and River Bend) - Acceptance Review of TSTF-563 LAR, Revise Instrument Testing Definitions to Incorporate the Surveillance Frequency Control Program ML20255A1892020-09-0909 September 2020 Email 09Sept2020 - RFI for RBS EP Exercise Inspection ML20260H4422020-09-0808 September 2020 NRR E-mail Capture - Entergy Fleet (Grand Gulf and River Bend) - Official RAIs for RR Associated with Updating ASME Code RR SEs with NRC-Approved Revision of BWRVIP Guidelines (GG-ISI-020 and RBS-ISI-019) ML20169A3782020-06-16016 June 2020 Email-20-0196-NRC Riv Response V. Dricks to Tom Gurdziel Inquiry: Extent of Condition Flex Equipment ML20169A6752020-05-20020 May 2020 Email-20-0196, Tom Gurdziel Inquiry to NRC Chairman Resource, Extent of Condition FLEX Equipment, 05/20/2020 ML20093C3072020-04-0101 April 2020 NRR E-mail Capture - (External_Sender) Entergy Fleet - Performance-Based Cyber Security Testing Plan Fee Waiver Response Letter (EPID P-2020-PRF-0000; CAC No. 001648) ML20086J6572020-03-26026 March 2020 NRR E-mail Capture - River Bend Station, Unit 1 -Acceptance Review of the LAR Associated with Extending the Implementation Date from 5/13/2020 to 9/30/2020 for Emergency Action Level Scheme ML20079D9302020-03-19019 March 2020 NRR E-mail Capture - Entergy Fleet (Grand Gulf and River Bend) - Acceptance Review of LAR Associated with Adopting TSTF-501, Relocate Stored Fuel Oil and Lube Oil Volumes to Licensee Control ML20057G1752020-02-24024 February 2020 NRR E-mail Capture - Entergy Fleet (Grand Gulf and River Bend) - Acceptance Review of LAR Associated with TSTF-566, Revise Actions for Inoperable RHR-Shutdown Cooling Subsystems ML20057G1592020-02-24024 February 2020 NRR E-mail Capture - Entergy Fleet (Grand Gulf and River Bend) - Acceptance Review of LAR Associated with TSTF-439, Eliminate Second Completion Times Limiting Time from Discovery of Failure to Meet an LCO ML20038A2092020-02-0404 February 2020 05000458 Request for Information IR2020-001 Occupational Radiation Safety ML19352F5222019-12-17017 December 2019 NRR E-mail Capture - Acceptance Review Results for License Amend Request to Revise TS 3.3.5.2 to Adopt TSTF-425, Rev 3, Relocate Surveillance Frequencies to Licensee Control - RITSTF Initiative 5b, for River Bend, ML19102A0722019-04-11011 April 2019 NRR E-mail Capture - River Bend Station, Unit 1 - Final Request for Additional Information Relief Request RBS-ISI-021 ML19095B7622019-04-0303 April 2019 Acceptance Review Results for License Amendment Request to Adopt TSTF-564, Revision 2, Safety Limit MCPR (Minimum Critical Power Ratio), for Grand Gulf Nuclear Station, Unit 1 and River Bend Station, Unit 1 (EPID L-22019-LLA-0051) ML19059A1782019-02-28028 February 2019 Acceptance Review Results for Relief Request No. EN-19-RR-1 to Use ASME Code Case N-831-1 for Entergy Fleet ML19059A0292019-02-27027 February 2019 NRR E-mail Capture - Acceptance Review Results for License Amendment Request to Adopt TSTF-529, Revision 4, Clarify Use and Application Rules, for Entergy Fleet ML19008A3592019-01-0808 January 2019 NRR E-mail Capture - Acceptance Review: RR Volumetric Exams (L-2018-LLR-0388) ML18365A1422018-12-28028 December 2018 NRR E-mail Capture - Acceptance Review Results - Removal of TS Table of Contents (L-2018-LLA-0489) ML18337A0052018-11-30030 November 2018 Acceptance Review Results: River Bend Station License Amendment Request New Spent Fuel Pool Criticality Analysis 2024-05-16
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARML24106A0432024-04-11011 April 2024 June 2024 Emergency Preparedness Exercise Inspection Request for Information ML24088A0092024-03-27027 March 2024 NRR E-mail Capture - Entergy Fleet - Final Request for Confirmation of Information (RCI) Re Alternative Request EN-RR-22-001 Concerning ASME Code Case N-752 (L-2022-LLR-0054) ML23348A1222023-12-14014 December 2023 NRR E-mail Capture - Grand Gulf, River Bend, and Waterford, Unit 3 - 2nd Round of Official RAIs for RR EN-RR-22-001, Use ASME Code Case N-752, Risk Informed Categorization for Class 2 and 3 Systems ML23311A4322023-11-0909 November 2023 Notification of NRC Supplemental Inspection (95001) and Request for Information ML23195A0692023-07-24024 July 2023 2023 River Bend Station Notification of Biennial Problem Identification and Resolution Inspection and Request for Information ML23116A1462023-04-26026 April 2023 NRR E-mail Capture - Entergy Fleet (Grand Gulf and River Bend) - Final RAI for Request to Update ASME Code Relief Request Safety Evaluations with NRC-Approved Revision of BWRVIP Guidelines (GG-ISI-020, and RBS-ISI-019) ML23081A4602023-03-22022 March 2023 RFI River Bend CETI 2023012 Drr ML23004A0422023-01-0404 January 2023 License Renewal Phase 1 Request for Information ML22354A0812022-12-20020 December 2022 Inservice Inspection Request for Information ML22235A1082022-08-19019 August 2022 RBS Emergency Preparedness (EP) Exercise Inspection October 2022 RFI ML22180A0612022-06-29029 June 2022 Notification of an NRC Fire Protection Baseline Inspection (NRC Inspection Report 05000458/2022010) and Request for Information ML20350B8112020-12-11011 December 2020 2021 RBS PIR Request for Information ML20337A4452020-12-0202 December 2020 Riverbend Station Inservice Inspection Request for Information ML20255A1892020-09-0909 September 2020 Email 09Sept2020 - RFI for RBS EP Exercise Inspection ML20260H4422020-09-0808 September 2020 NRR E-mail Capture - Entergy Fleet (Grand Gulf and River Bend) - Official RAIs for RR Associated with Updating ASME Code RR SEs with NRC-Approved Revision of BWRVIP Guidelines (GG-ISI-020 and RBS-ISI-019) ML20162A1122020-06-10010 June 2020 Notification of Inspection (NRC Inspection Report 05000458/2020003) and Request for Information ML20126G3922020-05-0101 May 2020 Request for Information, May 01, 2020, River Bend Station Special Inspection, NRC Inspection Report 2020050 ML20038A2092020-02-0404 February 2020 05000458 Request for Information IR2020-001 Occupational Radiation Safety ML19102A0722019-04-11011 April 2019 NRR E-mail Capture - River Bend Station, Unit 1 - Final Request for Additional Information Relief Request RBS-ISI-021 ML18250A3112018-09-0404 September 2018 NRR E-mail Capture - Final RAI - RBS EAL Scheme Change LAR (L-2018-LLA-0130) ML18229A0082018-08-16016 August 2018 NRR E-mail Capture - Final Request for Additional Information for P-T Curves - NON-PROPRIETARY Version ML18250A3102018-08-0101 August 2018 NRR E-mail Capture - Draft RAI - RBS EP EAL Scheme Change LAR (L-2018-LLA-0130) ML18151A0822018-05-30030 May 2018 Summary of a Telephone Conference Call Held on May 21, 2018, Between NRC and Entergy Regarding the Need for Additional Information to Support the River Bend Station License Renewal Application RBG-47861, Response to License Renewal Application NRC Request for Additional Information Sets 14,15 and Operating Experience Review Clarification2018-05-29029 May 2018 Response to License Renewal Application NRC Request for Additional Information Sets 14,15 and Operating Experience Review Clarification ML18149A2882018-05-24024 May 2018 NRR E-mail Capture - River Bend Station Request for Additional Information - Reactor Core Isolation Cooling Piping Modification (L-2018-LLA-0029) ML18141A3172018-05-21021 May 2018 OE Draft RAI 3-0-5 Rogers ML18141A4882018-05-21021 May 2018 Draft Response (RAI 3.6.2.2.2.2-1a) from LRA Review Revised After the May 17, 2018 Call ML18131A2412018-05-11011 May 2018 RBS 012 Item 158a Response (RAI 3.2.2.3.2-1a) Revised - Received on 05/10/2018 ML18124A0092018-05-0303 May 2018 Final Requests for Additional Information for the Safety Review of the River Bend Station License Renewal Application (CAC No. MF9757) - Set 15 ML18122A2312018-05-0202 May 2018 Draft Response to NRC Request for Additional Information (RAI) B.1.40-5 Service Water Integrity Generated from Staffs Review on the River Bend Station, Unit 1 License Renewal Application ML18122A1262018-05-0202 May 2018 RAI B.1.17-1 Revised - w- header-footer-watermark ML18121A3022018-05-0101 May 2018 Draft Response to NRC Request for Additional Information (RAI) 4.6-2a Generated from Staff'S Review on the River Bend License Renewal Application ML18121A0292018-04-30030 April 2018 Final Requests for Additional Information for the Safety Review of the River Bend Station License Renewal Application (CAC No. MF9757) - Set 14 ML18115A1632018-04-25025 April 2018 Draft Response on RBS LRA RAI B.1.21-2 Flow Accelerated Corrosion ML18113A3322018-04-23023 April 2018 035 RB Buried Pipe 3rd Round RAI - Allik Holston ML18103A0152018-04-12012 April 2018 NRR E-mail Capture - Summary of Public Telephone Conference Call Held on March 27, 2018, Between the U.S. Nuclear Regulatory Commission and Entergy and Final Requests for Additional Information for the Safety Review of the River Bend Statio ML18073A0912018-03-14014 March 2018 NRC and Energy Public Meeting on Fatigue Analysis Related to River Bend License Renewal ML18068A1872018-03-0909 March 2018 Revision of Final Request for Additional Information (RAI 2.3.3.17-2) for the Safety Review of the River Bend Station License Renewal Application (CAC No. MF9757) - Set 11 RBG-47834, Response to License Renewal Application NRC Request for Additional Information (RAI) Set 92018-03-0808 March 2018 Response to License Renewal Application NRC Request for Additional Information (RAI) Set 9 ML18065A2132018-03-0606 March 2018 Final Requests for Additional Information for the Safety Review of the River Bend Station License Renewal Application (CAC No. MF9757) - Set 12 ML18060A1532018-03-0101 March 2018 NRR E-mail Capture - River Bend Station: Request for Additional Information Concerning New Technical Specification for Control Building Air Conditioning (L-2017-LLA-0291) ML18058A0572018-02-23023 February 2018 Enclosurequest for Additional Information (Letter to J. Giddens Request for Additional Information Regarding Entergy Operations, Inc.'S Decommissioning Funding Plan Update) ML18043A3512018-02-12012 February 2018 Final Requests for Additional Information for the Safety Review of the River Bend Station License Renewal Application (CAC No. MF9757) - Set 11 ML18043A0082018-02-0808 February 2018 Final Requests for Additional Information for the Safety Review of the River Bend Station License Renewal Application (CAC No. MF9757) - Set 10 ML18038B4702018-02-0707 February 2018 NRR E-mail Capture - Fyi_River Bend Station RAIs Set 9 ML18022A9412018-01-22022 January 2018 Final Requests for Additional Information for the Safety Review of the River Bend Station License Renewal Application (CAC No. MF9757) - Set 8 ML18011A0462018-01-10010 January 2018 Notification of Cyber Security Inspection (NRC Inspection Report 05000458/2018406) and Request for Information IR 05000458/20184062018-01-10010 January 2018 River Bend Station - Notification of Cyber Security Inspection (NRC Inspection Report 05000458/2018406) and Request for Information ML18009A9092018-01-0909 January 2018 Final Requests for Additional Information for the Safety Review of the River Bend Station License Renewal Application (CAC No. MF9757) - Set 7 ML17361A3962017-12-27027 December 2017 Final Requests for Additional Information for the Safety Review of the River Bend Station License Renewal Application (CAC No. MF9757) - Set 6 2024-04-11
[Table view] |
Text
NRR-DMPSPEm Resource From: Regner, Lisa Sent: Wednesday, August 1, 2018 4:38 PM To: SCHENK, TIM Cc: bjohns (bjohns@entergy.com)
Subject:
DRAFT RAI - RBS EP EAL Scheme Change LAR (L-2018-LLA-0130)
Follow Up Flag: Follow up Flag Status: Flagged
- Tim, Below is the DRAFT RAI for your EAL Scheme Change application to update to NEI 99-01, Revision 6.
Please let me know if you need a clarification call.
Thanks.
Lisa Regner Sr. Project Manager NRR/DORL/LPL4 301-415-1906 O9D14 REQUESTS FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST EMERGENCY ACTION LEVEL SCHEME CHANGE RIVER BEND STATION, UNIT 1 DOCKET NUMBER 50-458 By letter dated April 30, 2018 (Agencywide Documents Access and Management System (ADAMS) Accession Number ML18128A044 [package]), Entergy Operations, Inc. (the licensee or Entergy) requested U.S. Nuclear Regulatory Commission (NRC) approval for an emergency action level (EAL) scheme change for River Bend Station (RBS), Unit 1. The NRC staff has reviewed the submittal and determined that additional information is needed to complete the review, as indicated in the requests for additional information (RAIs) below.
Regulatory Requirements/Background The requirements of Section 50.47(b)(4) to Title 10 of the Code of Federal Regulations (10 CFR) state, in part, that:
A standard emergency classification and action level scheme, the bases of which include facility system and effluent parameters, is in use by the nuclear facility licensee...
The most recent industry EAL scheme development guidance is provided in the Nuclear Energy Institute (NEI) document NEI 99-01, Development of Emergency Action Levels for Non-Passive Reactors (ADAMS Accession Number ML12326A805). By letter dated March 28, 2013, the NRC endorsed NEI 99-01, Revision 6, as acceptable generic (i.e.,
non-plant-specific) EAL scheme development guidance. Entergy proposed to revise its current EAL scheme to one based on NEI 99-01, Revision 6.
1
- 1. For EALs CS1.3 and CG1.2, the Basis discussion for the proposed threshold value for the containment radiation monitors states that the value is higher than that likely to be attributable to normal refuel operations. Additional justification provided in the EAL Comparison Matrix, which states, [t]he dose rate due to core shine when the top of the core becomes uncovered should result in the indicated value. Neither of these discussions provides sufficient justification to determine if the proposed value is reasonable or to justify a change from the currently approved value. Provide additional detail that supports the threshold value for the proposed containment radiation monitors.
- 2. The proposed EAL CU3.1 contains the condition due to the loss of decay heat removal capability, which is not consistent with NEI 99-01, Revision 6. This could result in potential misclassification for an event that causes reactor coolant system (RCS) temperature to rise above 200 degrees Fahrenheit (°F) when decay heat removal capability has not been lost. Provide additional justification for the condition, due to the loss of decay heat removal capability, to the EAL CU3.1 threshold value, or revise accordingly.
- 3. The proposed EAL CA3.1 Basis discussion (1st paragraph), contains the condition, caused by the loss of decay heat removal capability, which is not consistent with NEI 99-01, Revision 6. This could result in potential misclassification for an event other than a loss decay heat removal capability that leads to an unplanned RCS pressure increase. Provide additional justification that the proposed Basis wording would not result in an inaccurate or delayed assessment, or revise accordingly.
- 4. In EALs CU5.1 and SU7.1, the proposed State and local agency communications methods include the INFORM Notification System (INFORM), satellite phones, and the State of Louisiana radio.
- a. Please explain how INFORM can be used as a State and local agency communication method.
This response should explain whether or not INFORM is independent of the provided telephone systems and if INFORM supports two-way communications.
- b. Please explain how the satellite phones can be used as an offsite and NRC communication method. This response should explain how the satellite phones can be used to concurrently provide offsite and NRC communications.
- c. Please explain how the State of Louisiana radio can be used to concurrently communicate with all designated State and local response organizations.
- 5. The NRC staff could not determine why the threshold value for Fuel Cladding Barrier (FCB) Loss under FCB3 is significantly higher than that for Grand Gulf Nuclear Station (GGNS), which is a higher power Boiling Water Reactor Type 6 (BWR-6) with a Mark 3 Containment (400 R/hr for GGNS and 3000 R/hr for RBS), while the Containment Barrier (CNB) threshold values under CNB8 for a Potential Loss were much closer (7000 R/hr for GGNS and 12000 R/hr for RBS). Please verify that the containment radiation monitor threshold values for a FCB Loss are based on a loss of the RCS with between approximately 2% and 5% clad damage and that the radiation monitor threshold values for a CNB Potential Loss are based on approximately 20% clad damage.
- 6. The currently approved EAL scheme includes high pressure core spray (HPCS) as a threshold value for a loss of the RCS under the Fission Product Barrier Matrix. However, HPCS does not appear to be included in the proposed EAL scheme. The guidance states that the list of systems should also include high pressure coolant injection [high pressure core spray], since a rupture of the HPCS, if not isolated, could rapidly depressurize the reactor pressure vessel. Please justify not including the HPCS as a threshold value for the proposed RCB2.
- 7. Please explain why the Basis discussion (third paragraph) for a Potential Loss under CNB7, which states, cannot be maintained above, does not use the same wording as the threshold value, which states, cannot be restored and maintained within. This difference in wording could result in an inaccurate or delayed assessment.
2
- 8. The proposed EAL HU4.2 - Table H-1, Fire Areas, includes the entire Reactor Building in all modes.
This could result in an event declaration due to the spurious actuation of a single fire alarm.
The NRC staff could not determine if the Containment Fire Detection System, in combination with the Containment Ventilation System, supported the inclusion of the Reactor Building as a fire area for EAL HU4.2. Provide justification that demonstrates why the Reactor Building is included in the Table H-1 for all modes, or modify accordingly.
- 9. The proposed EAL SU4.1 threshold value is based on the Offgas Pretreatment Radiation Monitor High Alarm, while the currently approved EAL scheme uses a table that includes various radiation monitor readings, which correspond to various flow rates.
The NRC staff could not determine if a value that was approximately equal to the technical specification allowable limits could be assessed with the proposed threshold value. Please provide a justification that supports using the Offgas Pretreatment Radiation Monitor High Alarm as a threshold value for SU4.1.
This justification should include a discussion of the apparent difference between the currently approved EAL scheme (EAL SU9.1) and the proposed EAL SU4.1.
3
Hearing Identifier: NRR_DMPS Email Number: 548 Mail Envelope Properties (CY1PR09MB1146E7C1497656A378E38C71E52D0)
Subject:
DRAFT RAI - RBS EP EAL Scheme Change LAR (L-2018-LLA-0130)
Sent Date: 8/1/2018 4:38:03 PM Received Date: 8/1/2018 4:38:06 PM From: Regner, Lisa Created By: Lisa.Regner@nrc.gov Recipients:
"bjohns (bjohns@entergy.com)" <bjohns@entergy.com>
Tracking Status: None "SCHENK, TIM" <tschenk@entergy.com>
Tracking Status: None Post Office: CY1PR09MB1146.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 7257 8/1/2018 4:38:06 PM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:
Recipients Received: Follow up