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| | issue date = 07/29/2010 | | | issue date = 07/29/2010 |
| | title = Draft RAI MR3267- ME3268 EDG Fuel Oil | | | title = Draft RAI MR3267- ME3268 EDG Fuel Oil |
| | author name = Wengert T J | | | author name = Wengert T |
| | author affiliation = NRC/NRR/DORL/LPLIII-1 | | | author affiliation = NRC/NRR/DORL/LPLIII-1 |
| | addressee name = | | | addressee name = |
Revision as of 04:34, 11 July 2019
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MONTHYEARL-PI-10-001, License Amendment Request (LAR) to Revise Technical Specification (TS) 3.8.3, Diesel Fuel Oil, Storage Requirements2010-01-27027 January 2010 License Amendment Request (LAR) to Revise Technical Specification (TS) 3.8.3, Diesel Fuel Oil, Storage Requirements Project stage: Request ML1006405932010-03-0505 March 2010 Acceptance Review of LAR to Revise Technical Specification 3.8.3, Diesel Fuel Oil, Storage Requirements Project stage: Acceptance Review ML1027104452010-07-29029 July 2010 Draft RAI MR3267- ME3268 EDG Fuel Oil Project stage: Draft RAI ML1027103982010-07-29029 July 2010 Draft RAI LAR to Revise Technical Specifications 3.6.3 Diesel Fuel Oil, Storage Requirements Project stage: Draft RAI L-PI-10-089, Withdrawal of License Amendment Request (LAR) to Revise Technical Specification ITS) 3.8.3, Diesel Fuel Oil, Storage Requirements2010-09-16016 September 2010 Withdrawal of License Amendment Request (LAR) to Revise Technical Specification ITS) 3.8.3, Diesel Fuel Oil, Storage Requirements Project stage: Withdrawal ML1026407802010-10-0101 October 2010 United States Nuclear Regulatory Commission Northern States Power Company - Minnesota Docket Nos. 50-282 and 50-306 Notice of Withdrawal of Application for Amendment to Facility Operating License Project stage: Withdrawal ML1026407762010-10-0101 October 2010 Withdrawal of an Amendment Request Project stage: Withdrawal NRC-2010-0325, United States Nuclear Regulatory Commission Northern States Power Company - Minnesota Docket Nos. 50-282 and 50-306 Notice of Withdrawal of Application for Amendment to Facility Operating License2010-10-0101 October 2010 United States Nuclear Regulatory Commission Northern States Power Company - Minnesota Docket Nos. 50-282 and 50-306 Notice of Withdrawal of Application for Amendment to Facility Operating License Project stage: Withdrawal 2010-03-05
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Category:Request for Additional Information (RAI)
MONTHYEARML23335A1152023-12-0101 December 2023 NRR E-mail Capture - Prairie Island Units 1 and 2 - Request for Additional Information LAR to Revise TS 3.7.8 Required Actions ML23248A3462023-09-0505 September 2023 NRR E-mail Capture - Request for Additional Information for Monticello Nuclear Generating Plant and Prairie Island Nuclear Generating Plant - Decommissioning Funding Status Reports ML23214A2032023-08-0202 August 2023 Request for Information for an NRC Quadrennial Comprehensive Engineering Team Inspection: Inspection Report 05000282/2024010; 05000306/2024010 ML23199A0922023-07-18018 July 2023 Notification of NRC Baseline Inspection and Request for Information; Inspection Report 05000306/2023004 ML23096A3082023-04-0707 April 2023 Notification of Inspection an NRC Biennial Licensed Operator Requalification Program Inspection and Request for Information ML23055B0562023-02-27027 February 2023 Request for Information for NRC Commercial Grade Dedication Inspection Inspection Report 05000282/2023010 and 05000306/2023010 ML23053A1432023-02-22022 February 2023 Information Request to Support Upcoming Problem Identification and Resolution (Pi&R) Inspection at Prairie Island Nuclear Generating Plant ML22166A4112022-06-15015 June 2022 NRR E-mail Capture - Request for Additional Information Prairie Island Nuclear Generating Plant, Unit 2, Alternative RR-08, PIV Leakage ML22160A6022022-06-0909 June 2022 NRR E-mail Capture - Draft Request for Additional Information Prairie Island Nuclear Generating Plant, Units 1 and 2, 24-Month Operating Cycle Amendment ML22145A4152022-05-25025 May 2022 Information Request for the Cyber-Security Baseline Inspection, Notification to Perform Inspection 05000282/2022402 05000306/2022402 ML22131A2652022-05-11011 May 2022 NRR E-mail Capture - Request for Additional Information Xcel Energy Amendment Request to Create a Common Eplan and EOF for Monticello and Prairie Island ML22130A5792022-05-11011 May 2022 Information Request to Support the NRC Annual Baseline Emergency Action Level and Emergency Plan Changes Inspection ML21321A0452021-11-10010 November 2021 Request for Additional Information: Prairie Island 24-Month Cycle Amendment Request ML21305A0102021-10-29029 October 2021 NRR E-mail Capture - Request for Additional Information Prairie Island Cooling Water Amendment ML21252A0122021-08-30030 August 2021 NRR E-mail Capture - Request for Additional Information Amendment Request to Adopt TSTF-471 and 517-T for Prairie Island ML21147A5232021-06-0303 June 2021 Prarie Island Nuclear Generating Plant, Units 1 and 2 - Information Request to Support the NRC Annual Baseline Emergency Action Level and Emergency Plan Changes Inspection ML21131A0752021-05-10010 May 2021 Notification of NRC Baseline Inspection and Request for Information; Inspection Report 05000282/2021004; 05000306/2021004 ML21099A0972021-04-0909 April 2021 Information Request to Support Upcoming Temporary Instruction 2515/194 Inspection; Inspection Report 05000282/2021012 and 05000306/2021012 ML21062A0532021-03-0202 March 2021 Information Request to Support Upcomng Problem Identification and Resolution (Pi&R) Inspection at the Prairie Island Nuclear Generating Plant ML21033A6112021-02-0101 February 2021 Request for Information for an NRC Triennial Baseline Design Bases Assurance Inspection (Team); Inspection Report 05000282/2021010 and 05000306/2021010 ML20343A1292020-12-0808 December 2020 NRR E-mail Capture - Request for Additional Information ML20192A1442020-07-0707 July 2020 NRR E-mail Capture - Request for Additional Information Prairie Island License Amendment Request to Adopt TSTF-505 ML20189A1782020-07-0606 July 2020 Notification of NRC Baseline Inspection and Request for Information; Inspection Report 05000282/2020004; 05000306/2020004 ML20133K0692020-05-14014 May 2020 Information Request to Support the NRC Annual Baseline Emergency Action Level and Emergency Plan Changes Inspection ML20077K6242020-04-13013 April 2020 License Amendment Request - Request for Additional Information ML20052F4102020-02-21021 February 2020 Notification of Nrc Design Bases Assurance Inspection (Programs) (05000282/202010; 05000306/202010) and Initial Request for Information ML20035F1552020-02-0404 February 2020 NRR E-mail Capture - Request for Additional Information Monticello and Prairie Island Alternative Requests to Adopt Code Cases N-786-3 and N-789-3 (Epids: L-2019-LLR-0078 and L-2019-LLR-0079) ML19233A0032019-08-14014 August 2019 NRR E-mail Capture - Request for Additional Information Prairie Island Relief Requests 1-RR-10 and 2-RR-10 ML19057A1652019-02-26026 February 2019 NRR E-mail Capture - Request for Additional Information Prairie Island 50.69 Amendment Request ML18313A0832018-11-0707 November 2018 NRR E-mail Capture - Request for Additional Information Prairie Island NFPA-805 License Condition Modification Amendment Request ML18264A1912018-09-19019 September 2018 NRC Information Request (9/19/2018); Part B Items (Onsite) IP 71111.08 - E-Mailed 09/19/18 (DRS-M.Holmberg) ML18235A2982018-08-23023 August 2018 NRR E-mail Capture - Request for Additional Information Prairie Island TSTF-425 License Amendment Request ML18169A4202018-06-25025 June 2018 Supplemental Information Needed for Acceptance of Requested Licensing Action Amendment to Modify Renewed Facility Operating License Paragraph 2.C(4)(c) ML18025C0152018-01-24024 January 2018 Request for Information for an NRC Triennial Baseline Design Bases Assurance Inspection (Team): Inspection Report 05000282/2018011; 05000306/2018011 (DRS-A.Dunlop) ML17277B3332017-10-0404 October 2017 NRR E-mail Capture - Request for Additional Information Prairie Island Special Heavy Lifting Devices LAR ML17249A9232017-09-0606 September 2017 Notification of NRC Baseline Inspection and Request for Information; Inspection Report 05000282/2017004; 05000306/2017004 (Exf) ML17235A9982017-08-23023 August 2017 NRR E-mail Capture - Request for Additional Information Prairie Island EAL Scheme Change ML17221A3892017-08-0909 August 2017 NRR E-mail Capture - Request for Additional Information for Prairie Island Nuclear Generating Plant License Amendment Request Dated February 23, 2017 Emergency Response Organization ML17219A0762017-08-0707 August 2017 NRR E-mail Capture - Request for Additional Information for Prairie Island Nuclear Generating Plant License Amendment Request Dated February 23, 2017 Emergency Response Organization ML17038A5132017-02-0707 February 2017 NRR E-mail Capture - Prairie Island NFPA 805 LAR, PRA RAI 21.01 ML17018A4272017-01-18018 January 2017 NRR E-mail Capture - Request for Additional Information: Prairie Island License Amendment Request to Revise Technical Specification 3.8.7 to Remove Non-Conservative Required Action ML16326A3532016-11-18018 November 2016 NRR E-mail Capture - Draft Request for Information Related to Prairie Island NFPA-805 License Amendment ML16265A1652016-09-20020 September 2016 Notification of an NRC Triennial Heat Sink Performance Inspection and Request for Information; Inspection Report 05000282/2016004; 05000306/2016004 (Gfo) ML16189A2052016-07-0707 July 2016 Notification of NRC Inspection and Request for Information ML16113A1612016-04-21021 April 2016 Information Request to Support Upcoming Problem Identification and Resolution (Pi&R) Inspection at Prairie Island Nuclear Generating Plant, Units 1 and 2 ML16075A0802016-03-15015 March 2016 NRR E-mail Capture - Prairie Island Nuclear Generating Plant, Units 1 and 2 Request for Additional Information Related to License Amendment Request to Adopt TSTF-523, GL 2008-01, Managing Gas Accumulation ML16008A1092016-01-0808 January 2016 NRR E-mail Capture - Prairie Island Nuclear Generating Plant, Units 1 and 2 - Requests for Additional Information (Afpb) License Amendment Request to Adopt NFPA 805 ML15195A6562015-07-10010 July 2015 Prairie Island Notification of NRC Inspection and Request for Information ML15149A1662015-05-28028 May 2015 Plan - Information Request to Support the NRC Annual Baseline Emergency Action Level and Emergency Plan Changes Inspection (Mxg) ML15121A6512015-04-29029 April 2015 Request for Information for an NRC Triennial Baseline Component Design Bases Inspection (CDBI) Inspection Report 05000282/2015007; 05000306/2015007 (Jen) 2023-09-05
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Enclosure REQUEST FOR ADDITIONAL INFORMATION NORTHERN STATES POWER COMPANY - MINNESOTA PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2 DOCKET NOS. 50-282 AND 50-306 By letter dated January 27, 2010, the Northern States Power Company, a Minnesota corporation, doing business as Xcel Energy (the licensee) requested a license amendment to revise the Unit 1 diesel fuel oil storage volumes in Technical Specification (TS) 3.8.3, and to add a wording clarification in a TS 3.8.3 Condition statement for the Prairie Island Nuclear Generating Plant, Units 1 and 2. To complete its review, the NRC staff requests the following additional information.
- 1. Administrative limits of
+/- 0.5 Hz have been placed on the allowable frequency range within which the emergency diesel generators (EDGs) can operate. The license amendment request (LAR) states that the fuel consumption calculations were performed at the upper administrative limit of +0.5 Hz (60.5 Hz). The Technical Specification (TS) allowable value is 61.2 Hz. Provide details on plans to change TS allowable frequency range given that the existing allowable frequency range results in higher fuel consumption.
- 2. Calculation ENG-ME-020 seems to calculate the fuel oil consumption using the alternate method described in Appendix B of ANSI/ANS-59.51-1989. Appendix B states that "a minimum margin of 10 percent is added to the calculated storage requirement if this alternative calculational approach is used." The minimum 10 percent margin does not appear to be added in your calculation. Provide a detailed explanation.
- 3. Calculation ENG-ME-020 assumes a fuel oil density of 6.91lb/gal. Provide details on the range of fuel oil densities allowed in your fuel oil shipments and clarify the conversion method used in the calculation to evaluate the available BTUs.
- 4. ASTM D975-08a allows fuel oil to contain up to 5 percent biodiesel. Please explain how your required fuel oil storage capacity will be affected if your fuel oil contains 5 percent biodiesel.
- 5. The LAR states that six Class 1 tanks are interconnected such that any tank can be manually aligned to supply any Unit 1 EDG or diesel driven cooling water pump day tank and any combination of inventory in these tanks may be used to satisfy the inventory requirements for the Unit 1 EDGs. Provide detailed descriptions of:
- 1) Flow paths from each tank to each EDG and to associated cooling pumps.
- 2) Procedures/surveillances performed to demonstrate each path will be available when needed.
- 6. Assumption 4.2.3 of Calculation ENG-ME-020 indicates that the Diesel Engine efficiency is assumed to be 0.974, corresponding to 75 percent loading assumption. Verify that this is a factor relative to the Diesel Fuel oil consumption at 100 percent and not the efficiency of the Diesel Engine. The use of the 75 percent loading efficiency is considered more conservative than the 100 percent loading efficiency. Table 5-1 of the calculation provides the loading profile used for 14-day fuel oil consumption. This Table indicates that the EDG will be loaded at 1524.27kW for 14 days less 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. This loading equates to approximately 55 percent of EDG continuous rating. The relative efficiency is expected to be less than the 75 percent efficiency. Provide a detailed discussion concerning how EDG efficiency is factored into the bounding EDG loading to determine the required bounding storage capacity.
- 7. The LAR states that the fuel oil tanks and interconnecting piping are buried below the frost line and fuel oil temperature variations are not considered in the calculations.
Provide a detailed discussion concerning how temperature is considered in terms of calculating a bounding required fuel volume, given that temperature variations are not considered.
- 8. The TS fuel oil requirement is based on operation of an EDG and its associated support systems to supply accident mitigation equipment for a specified period of time. At PINGP, the diesel driven cooling water pumps appear to be a support system critical for the operation of the EDG to supply accident mitigation loads for 14 days. Provide a detailed discussion explaining why EDG cooling pump fuel consumption is not factored into the TS-controlled bounding fuel oil volume requirements.
- 9. Table 5-1 of the calculation ENG-ME-020 provides the loading profile used for 14-day fuel oil consumption. This Table indicates that the EDG loading will be reduced from 2446.72 kW to 1524.27 kW within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. Provide a detailed discussion, including excerpts from accident analyses, procedures and manual actions, addressing how the load on the EDG is reduced and controlled within 60 minutes after onset of an accident.
This discussion should also address manual actions that control the addition of desirable nonsafety-related loads such as air compressors.
- 10. Table 6-1 of the calculation ENG-ME-020 provides details on fuel oil consumption rates of PINGP Unit 1 EDGs D1 and D2. The two EDGs are similar but data indicates that the efficiencies of the engines are different. The calculation for fuel oil is based on Train B (EDG D2) operation, which bounds the electrical loads for Train A. Provide details verifying that the fuel oil consumption of EDG D1, potentially operating at a marginally lower loading, is less than the EDG D2.