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| {{#Wiki_filter:1NRR-PMDAPEm ResourceFrom:Saba, FaridehSent:Saturday, February 21, 2015 4:06 PMTo:Williams, Gordon Robert (grwilliams1@tva.gov)Cc:Schrull, Edward Dustin (edschrull@tva.gov); Green, Kimberly; Sallman, Ahsan; Miller, Barry; Helton, Shana | | {{#Wiki_filter:1NRR-PMDAPEm Resource From:Saba, Farideh Sent:Saturday, February 21, 2015 4:06 PM To:Williams, Gordon Robert (grwilliams1@tva.gov) |
| | Cc:Schrull, Edward Dustin (edschrull@tva.gov); |
| | Green, Kimberly; Sallman, Ahsan; Miller, Barry; Helton, Shana |
|
| |
|
| ==Subject:== | | ==Subject:== |
| Follow up RAI regarding Attachment X of NFPA 805 LARImportance:HighHi Gordon, The NRC staff has reviewed the response to SCVB-RAI-12 in licensee's letter dated December 17, 2014 (ADAMS Accession No. ML14363A056). In order for the staff to complete its review, response to the follow up RAI number SCVB-RAI-13, below, is requested. In accordance with NRC policy, the incoming documents were checked for the presence of proprietary material, and no information marked proprietary was identified in the follow up RAI. Draft follow up RAI was emailed to you on January 21, 2015. You have informed me that you do not request a clarification call. I also agreed with your proposed response date of March 27, 2015. REQUEST FOR ADDITIONAL INFORMATION - Round 3 BY CONTAINMENT AND VENTILATION BRANCH REVIEW OF NFPA 805 TRANSITION REPORT ATTACHMENT X BROWNS FERRY UNITS 1, 2, & 3 DOCKET NOS. 50-259, 50-260, & 50-296 SCVB-RAI-13 Refer to response to SCVB-RAI-12(c) in Reference 1 that states: "The TVA Model is a mass and energy balance model that includes mass and energy inputs to the Reactor Pressure Vessel (RPV) from injection sources and decay heat and transfer of energy from the RPV to the suppression pool via the Safety Relief Valves (SRVs). The computer code solves the mass and energy balance for the Suppression Pool andRPV. The developed code allows for various operating parameters to be entered. The code takes these inputs and performs an integration of several mass, temperature, and pressure differential equations. The output is the results of these differential equations." Please provide response to item (A)1 through (A)7 below OR item (B). (A) The following information is requested regarding the TVA Model in order for the NRC staff to review its specific application for determining the NFPA 805 Case 3 long term suppression pool temperature response. 1. Confirm that the TVA Model is qualified to the requirements of 10 CFR Part 50 Appendix B, "Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants" with error reporting in accordance with 10 CFR Part 21, "Reporting of Defects and Noncompliance" | | Follow up RAI regarding Attachment X of NFPA 805 LAR Importance: |
| : 22. Provide technical justification for using TVA Model instead of SHEX model for determining the NFPA 805 Case 3 suppression pool temperature response 3. Sources of mass and sources of energy input for NFPA Case 3 in the TVA Model 4. Decay heat model used in the TVA Model 5. Assumptions used for NFPA 805 Case 3 in the TVA Model and comparison with the assumptions in SHEX long term suppression pool temperature response analysis for analyzing NFPA 805 Cases 1 and 2 6. Inputs used for NFPA 805 Case 3 in the TVA Model and comparison with the inputs in SHEX long term suppression pool temperature response analysis for analyzing NFPA 805 Cases 1 and 2 7. Explain how the Adder 5.9oF, given in response to SCVB-RAI-12(b), for the change in suppression pool temperature was calculated (B) Perform the NFPA 805 Case 3 analysis using General Electric-Hitachi Super Hex (SHEX) code using the same inputs and assumptions as in Case 1 and Case 2, Residual Heat Removal (RHR) heat exchanger k- factor of 270 BTU/sec-°F, and RHR Service Water (RHRSW) initiation time 2 hours. Provide results of peak suppression pool temperature, minimum Net Positive Suction Head (NPSH) available (NPSHa), and the margin between the NPSHa and NPSH required (NPSHr). REFERENCE 1. Letter from TVA to NRC dated December 17, 2014, "Response to NRC Request for Additional Information Regarding the License Amendment Request to Adopt NFPA 805 Performance-Based Standard for Fire Protection for Light Water Reactor Electric Generating Plants for the Browns Ferry Nuclear Plant, Units 1, 2, and 3 (TAC Nos. MF1185, MF1186, and MF1187) - Probabilistic Risk Assessment Follow Up (162-Day Responses)", (ADAMS Accession No. ML14363A056). Thanks, Farideh Farideh E. Saba, P.E. | | HighHi Gordon, |
| Senior Project Manager NRC/ADRO/NRR/DORL 301-415-1447 Mail Stop O-8G9A Farideh.Saba@NRC.GOV Hearing Identifier: NRR_PMDA Email Number: 1891 Mail Envelope Properties (36CF286628C20846A68047F2463233090141FFBC09C5) | | |
| | The NRC staff has reviewed the response to SCVB-RAI-12 in licensee's letter dated December 17, 2014 (ADAMS Accession No. ML14363A056). In order for the staff to complete its review, response to the follow up RAI number SCVB-RAI-13, below, is requested. |
| | In accordance with NRC policy, the incoming documents were checked for the presence of proprietary material, and no information marked proprietary was identified in the follow up RAI. |
| | Draft follow up RAI was emailed to you on January 21, 2015. You have informed me that you do not request a clarification call. I also agreed with your proposed response date of March 27, 2015. |
| | REQUEST FOR ADDITIONAL INFORMATION - Round 3 BY CONTAINMENT AND VENTILATION BRANCH REVIEW OF NFPA 805 TRANSITI ON REPORT ATTACHMENT X BROWNS FERRY UNITS 1, 2, & 3 DOCKET NOS. 50-259, 50-260, & 50-296 |
| | |
| | SCVB-RAI-13 |
| | |
| | Refer to response to SCVB-RAI-12(c) in Reference 1 that states: |
| | "The TVA Model is a mass and energy balance model that includes mass and energy inputs to the Reactor Pressure Vessel (RPV) from injection sources and decay heat and transfer of energy from the RPV to the suppression pool via the Safety Relief Valves (SRVs). The computer code solves the mass and energy balance for the Suppression Pool andRPV. The developed code allows for various operating parameters to be entered. The code takes these inputs and performs an integration of several mass, temperature, and pressure differential equations. The output is the results of these differential equations." |
| | Please provide response to item (A)1 through (A)7 below OR item (B). |
| | (A) The following information is requested regarding the TVA Model in order for the NRC staff to review its specific application for determining the NFPA 805 Case 3 long term suppression pool temperature response. |
| | : 1. Confirm that the TVA Model is qualified to the requirements of 10 CFR Part 50 Appendix B, "Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants" with error reporting in accordance with 10 CFR Part 21, "Reporting of Defects and Noncompliance" |
| | : 22. Provide technical justification for using TVA Model instead of SHEX model for determining the NFPA 805 Case 3 suppression pool temperature response |
| | : 3. Sources of mass and sources of energy input for NFPA Case 3 in the TVA Model |
| | : 4. Decay heat model used in the TVA Model |
| | : 5. Assumptions used for NFPA 805 Case 3 in the TVA Model and comparison with the assumptions in SHEX long term suppression pool temperature response analysis for analyzing NFPA 805 Cases 1 |
| | |
| | and 2 6. Inputs used for NFPA 805 Case 3 in the TVA Model and comparison with the inputs in SHEX long term suppression pool temperature response analysis for analyzing NFPA 805 Cases 1 and 2 |
| | : 7. Explain how the Adder 5.9 oF, given in response to SCVB-RAI-12(b), for the change in suppression pool temperature was calculated (B) Perform the NFPA 805 Case 3 analysis using General Electric-Hitachi Super Hex (SHEX) code using the same inputs and assumptions as in Case 1 and Case 2, Residual Heat Removal (RHR) heat exchanger k- factor of 270 BTU/sec-°F, and RHR Service Water (RHRSW) initiation time 2 hours. Provide results of peak suppression pool temperature, minimum Net Positive Suction Head (NPSH) available (NPSHa), and the margin between the NPSHa and NPSH required (NPSHr). |
| | REFERENCE |
| | : 1. Letter from TVA to NRC dated December 17, 2014, "Response to NRC Request for Additional Information Regarding the License Amendment Request to Adopt NFPA 805 Performance-Based Standard for Fire Protection for Light Water Reactor Electric Generating Plants for the Browns Ferry Nuclear Plant, Units 1, 2, and 3 (TAC Nos. MF1185, MF1186, and MF1187) - Probabilistic Risk Assessment Follow Up (162-Day Responses)", (ADAMS Accession No. ML14363A056). |
| | Thanks, Farideh Farideh E. Saba, P.E. |
| | Senior Project Manager NRC/ADRO/NRR/DORL 301-415-1447 Mail Stop O-8G9A Farideh.Saba@NRC.GOV |
| | |
| | Hearing Identifier: NRR_PMDA Email Number: 1891 Mail Envelope Properties (36CF286628C20846A68047F2463233090141FFBC09C5) |
|
| |
|
| ==Subject:== | | ==Subject:== |
| Follow up RAI regarding Attachment X of NFPA 805 LAR Sent Date: 2/21/2015 4:05:31 PM Received Date: 2/21/2015 4:05:00 PM From: Saba, Farideh Created By: Farideh.Saba@nrc.gov Recipients: "Schrull, Edward Dustin (edschrull@tva.gov)" <edschrull@tva.gov> Tracking Status: None "Green, Kimberly" <Kimberly.Green@nrc.gov> | | Follow up RAI regarding Attachment X of NFPA 805 LAR Sent Date: 2/21/2015 4:05:31 PM Received Date: 2/21/2015 4:05:00 PM From: Saba, Farideh Created By: Farideh.Saba@nrc.gov Recipients: "Schrull, Edward Dustin (edschrull@tva.gov)" <edschrull@tva.gov> Tracking Status: None "Green, Kimberly" <Kimberly.Green@nrc.gov> |
| Tracking Status: None "Sallman, Ahsan" <Ahsan.Sallman@nrc.gov> Tracking Status: None "Miller, Barry" <Barry.Miller@nrc.gov> Tracking Status: None "Helton, Shana" <Shana.Helton@nrc.gov> Tracking Status: None "Williams, Gordon Robert (grwilliams1@tva.gov)" <grwilliams1@tva.gov> Tracking Status: None Post Office: HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 4231 2/21/2015 4:05:00 PM Options Priority: High Return Notification: No Reply Requested: Yes Sensitivity: Normal Expiration Date: Recipients Received:}} | | Tracking Status: None "Sallman, Ahsan" <Ahsan.Sallman@nrc.gov> Tracking Status: None "Miller, Barry" <Barry.Miller@nrc.gov> Tracking Status: None "Helton, Shana" <Shana.Helton@nrc.gov> Tracking Status: None "Williams, Gordon Robert (grwilliams1@tva.gov)" <grwilliams1@tva.gov> Tracking Status: None |
| | |
| | Post Office: HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 4231 2/21/2015 4:05:00 PM |
| | |
| | Options Priority: High Return Notification: No Reply Requested: Yes Sensitivity: Normal Expiration Date: Recipients Received:}} |
|
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Category:E-Mail
MONTHYEARML23355A2202023-12-21021 December 2023 Radiation Protection Inspection - Inspection Report 2024-01 ML23332A0042023-11-27027 November 2023 NRR E-mail Capture - Request for Additional Information Related to Proposed Revised Alternative 0-ISI-47 ML23319A1662023-11-0202 November 2023 NRR E-mail Capture - Acceptance Review Results for Browns Ferry Nuclear Plant, Sequoyah Nuclear Plant, and Watts Bar Nuclear Plant, Exemption Request Related to 10 CFR 37.11(c)(2) ML23243A9892023-08-29029 August 2023 Inspection Information Request ML23208A0872023-07-26026 July 2023 NRR E-mail Capture - Acceptance Review Results for Browns Ferry 1, 2, and 3, Alternative Request 0-ISI-47 to Use an Alternative to ASME Code, Section XI, Examination Requirements for Examination Categories B-N-1 and B-N-2 ML23124A0082023-05-0303 May 2023 NRR E-mail Capture - Request for Additional Information Related to Proposed Alternative Requests for the 5th 10-Year Inservice Testing Interval for Browns Ferry Nuclear Plant, Units 1, 2, and 3 ML23117A0702023-04-26026 April 2023 NRR E-mail Capture - Acceptance Review Results for Browns Ferry, 1, 2, and 3, License Amendment Request to Revise Tech Specs Surveillance Requirements 3.4.3.2 and 3.5.1.11 Safety Relief Valves (BFN TS-540) ML23097A0172023-04-0606 April 2023 NRR E-mail Capture - Acceptance Review Results for Browns Ferry, Units 1, 2, and 3, License Amendment Request to Adopt TSTF-566-A and TSTF-580-A, Revision 1 ML23073A2082023-03-10010 March 2023 TVA Intentions on EA-22-122 - Choice Letter Response Email Message ML23073A2072023-03-10010 March 2023 TVA Intentions on EA-22-122 - Choice Letter Response Email Message - NRC Acknowledgement ML23075A0502023-03-10010 March 2023 TVA Intentions on EA-22-122 - Choice Letter Response Email Message and TVA Intentions on EA-22-122 - Choice Letter Response Email Message -- NRC Acknowledgement ML23052A0792023-02-21021 February 2023 NRR E-mail Capture - Acceptance Review for Browns Ferry and Sequoyah License Amendment Request to Adopt TSTF-541 ML23041A0022023-02-0909 February 2023 NRR E-mail Capture - Request for Additional Information Related to TVA Alternative Request BFN-0-ISI-32 (CNL-22-025) ML23013A1512023-01-13013 January 2023 NRR E-mail Capture - Acceptance Review Results for Browns Ferry Nuclear Plant, Units 1, 2, and 3, Request to Use Later ASME OM Code Edition and Alternative Requests BFN-IST-01 Through BFN-IST-05 ML23013A0382023-01-12012 January 2023 NRR E-mail Capture - (External_Sender) State Consultation for Alabama - Browns Ferry, Units 1, 2 and 3; Sequoyah, Units 1 and 2; and Watts Bar, Units 1 and 2, License Amendment Request to Adopt TSTF-529, Revision 4 (L-2022-LLA-0088) ML23017A0062023-01-12012 January 2023 Initial Information Request Inspection Report: 2023001 ML23013A0362023-01-12012 January 2023 NRR E-mail Capture - (External_Sender) State Consultation for Alabama - Browns Ferry, Units 1, 2 and 3; Sequoyah, Units 1 and 2; and Watts Bar, Units 1 and 2, License Amendment Request to Adopt TSTF-554-A, Revision 1 (L-2022-LLA-0100) ML23004A0352023-01-0404 January 2023 NRR E-mail Capture - Acceptance Review Results for Browns Ferry, Units 1, 2, and 3, License Amendment Request to Delete TS 3.6.3.1 by Adopting TSTF-478 ML22348A0972022-12-14014 December 2022 NRR E-mail Capture - State Consultation - Browns Ferry, Units 1, 2 and 3; Sequoyah, Units 1 and 2; and Watts Bar, Units 1 and 2, License Amendment Request to Adopt TSTF-529, Revision 4 (L-2022-LLA-0088) ML22348A0442022-12-13013 December 2022 NRR E-mail Capture - State Consultation - Browns Ferry, Units 1, 2 and 3; Sequoyah, Units 1 and 2; and Watts Bar, Units 1 and 2, License Amendment Request to Adopt TSTF-554-A, Revision 1 (L-2022-LLA-0100) ML22304A1852022-10-31031 October 2022 NRR E-mail Capture - Acceptance Review Results for Browns Ferry, Units 1, 2, and 3, License Amendment Request to Remove Site Acreage Description from TS 4.1 ML22299A0292022-10-26026 October 2022 NRR E-mail Capture - Request for Additional Information for Relief Request BFN-2-ISI-003 Re Weld Examination Coverage ML22292A2722022-10-19019 October 2022 NRR E-mail Capture - Request for Additional Information Related to Tva'S Request to Adopt TSTF-505 and TSTF-439 for Browns Ferry Nuclear Plant, Units 1, 2, and 3 ML22265A1492022-09-21021 September 2022 NRR E-mail Capture - Acceptance Review Results for Browns Ferry Nuclear Plant, Units 1, 2, and 3, Alternative Request BFN-0-ISI-32 ML22259A0392022-09-14014 September 2022 NRR E-mail Capture - Browns Ferry TSTF-505 Audit Questions - Part 5 ML22259A0382022-09-14014 September 2022 NRR E-mail Capture - Browns Ferry TSTF-505 Audit Questions - Part 4 ML22259A0372022-09-13013 September 2022 NRR E-mail Capture - Browns Ferry TSTF-505 Audit Questions - Part 3 ML22238A0672022-08-24024 August 2022 NRR E-mail Capture - Browns Ferry TSTF-505 Audit Questions - Part 2 ML22238A0652022-08-19019 August 2022 NRR E-mail Capture - Browns Ferry TSTF-505 Audit Questions ML22215A2752022-08-0303 August 2022 NRR E-mail Capture - Acceptance Review Results for TVA Fleet License Amendment Request to Adopt TSTF-554 ML22208A2172022-07-15015 July 2022 NRR E-mail Capture - Request for Additional Information Related to TVA Relief Request BFN-21-ISI-02 (CNL-21-081) ML22194A8762022-07-13013 July 2022 NRR E-mail Capture - Acceptance Review Results for TVA Fleet License Amendment Request to Adopt TSTF-529 ML22173A1682022-06-21021 June 2022 NRR E-mail Capture - Acceptance Review Results for Browns Ferry Nuclear Plant, Unit 2, Relief Request BFN-2-ISI-003 ML22168A0802022-06-17017 June 2022 NRR E-mail Capture - Request for Confirmation of Information and Additional Information Related to Tva'S Request to Use Control Bay Chiller Cross-Tie ML22160A4742022-06-0303 June 2022 NRR E-mail Capture - Browns Ferry Nuclear Plant, Units 1, 2, and 3 - Request for Additional Information Re LAR to Use Advanced Framatome Methodologies in Support of Atrium 11 Fuel ML22146A3342022-05-25025 May 2022 NRR E-mail Capture - Acceptance Review Results for Browns Ferry Nuclear Plant, Units 1, 2, and 3, Sequoyah Nuclear Plant, Units 1 and 2, and Watts Bar Nuclear Plant, Units 1 and 2, Relief Requests (EPID L-2022-LLR-0045 - 0047) ML22168A0392022-05-13013 May 2022 NRR E-mail Capture - Draft Request for Confirmation of Information and Additional Information Related to Tva'S Request to Use Control Bay Chiller Cross-Tie ML22144A1002022-05-12012 May 2022 NRR E-mail Capture - Request for Additional Information Related to Tva'S Request to Revised the TVA Plants' Radiological Emergency Plans ML22131A1692022-05-0303 May 2022 NRR E-mail Capture - Acceptance Review Results for Browns Ferry Nuclear Plant, Units 1, 2, and 3, License Amendment Request to Adopt TSTF-505 and TSTF-439 ML22091A1942022-03-0808 March 2022 2022 BFN POV Inspection Information Request ML22055A0772022-02-22022 February 2022 NRR E-mail Capture - Results of NRC SUNSI Review of Browns Ferry Nuclear Plant, Units 1, 2, and 3, Updated Final Safety Analysis Report, Amendment 29 ML22047A1612022-02-16016 February 2022 NRR E-mail Capture - Request for Additional Information Regarding Tva'S Request to Expand the SFP Criticality Safety Analysis for Browns Ferry Nuclear Plant, Units 1, 2, and 3 ML22038A1882022-02-0404 February 2022 NRR E-mail Capture - Acceptance Review Results for TVA Fleet License Amendment Request to Revise the TVA Radiological Emergency Plan ML22032A0322022-01-27027 January 2022 NRR E-mail Capture - Acceptance Review Results for Browns Ferry Nuclear Plant, Unit 2, Alternative Request BFN-21-ISI-02 ML22025A4132022-01-25025 January 2022 RP Inspection Doc Request ML22018A0272022-01-18018 January 2022 2022 All RFI Responses - Exercise and Program Inspections - Revl ML22010A0282022-01-0606 January 2022 NRR E-mail Capture - Acceptance Review Results for Browns Ferry, Units 1, 2, and 3, License Amendment Request to Adopt TSTF-205-A, Rev. 3 and TSTF-563-A, and Rescind the Consolidation of Several Surveillance Requirements ML21349A2262021-12-15015 December 2021 NRR E-mail Capture - Acceptance Review Results for Browns Ferry Nuclear Plant, Units 1, 2, and 3, License Amendment Request to Revise TS 3.8.7 for Installation of the Control Bay Chiller Cross-Tie ML21343A4212021-12-0909 December 2021 NRR E-mail Capture - Acceptance Review Results for Watts Bar Nuclear Plant, Units 1, 2, and 3, License Amendment Request to Revise TS 3.8.7 for Installation of the Control Bay Chiller Cross-Tie ML21334A3012021-11-30030 November 2021 NRR E-mail Capture - Browns Ferry Nuclear Plant, Units 1, 2, and 3 - Acceptance of License Amendment Request Regarding Adoption of TSTF-568-A 2023-08-29
[Table view] |
Text
1NRR-PMDAPEm Resource From:Saba, Farideh Sent:Saturday, February 21, 2015 4:06 PM To:Williams, Gordon Robert (grwilliams1@tva.gov)
Cc:Schrull, Edward Dustin (edschrull@tva.gov);
Green, Kimberly; Sallman, Ahsan; Miller, Barry; Helton, Shana
Subject:
Follow up RAI regarding Attachment X of NFPA 805 LAR Importance:
HighHi Gordon,
The NRC staff has reviewed the response to SCVB-RAI-12 in licensee's letter dated December 17, 2014 (ADAMS Accession No. ML14363A056). In order for the staff to complete its review, response to the follow up RAI number SCVB-RAI-13, below, is requested.
In accordance with NRC policy, the incoming documents were checked for the presence of proprietary material, and no information marked proprietary was identified in the follow up RAI.
Draft follow up RAI was emailed to you on January 21, 2015. You have informed me that you do not request a clarification call. I also agreed with your proposed response date of March 27, 2015.
REQUEST FOR ADDITIONAL INFORMATION - Round 3 BY CONTAINMENT AND VENTILATION BRANCH REVIEW OF NFPA 805 TRANSITI ON REPORT ATTACHMENT X BROWNS FERRY UNITS 1, 2, & 3 DOCKET NOS. 50-259, 50-260, & 50-296
SCVB-RAI-13
Refer to response to SCVB-RAI-12(c) in Reference 1 that states:
"The TVA Model is a mass and energy balance model that includes mass and energy inputs to the Reactor Pressure Vessel (RPV) from injection sources and decay heat and transfer of energy from the RPV to the suppression pool via the Safety Relief Valves (SRVs). The computer code solves the mass and energy balance for the Suppression Pool andRPV. The developed code allows for various operating parameters to be entered. The code takes these inputs and performs an integration of several mass, temperature, and pressure differential equations. The output is the results of these differential equations."
Please provide response to item (A)1 through (A)7 below OR item (B).
(A) The following information is requested regarding the TVA Model in order for the NRC staff to review its specific application for determining the NFPA 805 Case 3 long term suppression pool temperature response.
- 1. Confirm that the TVA Model is qualified to the requirements of 10 CFR Part 50 Appendix B, "Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants" with error reporting in accordance with 10 CFR Part 21, "Reporting of Defects and Noncompliance"
- 22. Provide technical justification for using TVA Model instead of SHEX model for determining the NFPA 805 Case 3 suppression pool temperature response
- 3. Sources of mass and sources of energy input for NFPA Case 3 in the TVA Model
- 4. Decay heat model used in the TVA Model
- 5. Assumptions used for NFPA 805 Case 3 in the TVA Model and comparison with the assumptions in SHEX long term suppression pool temperature response analysis for analyzing NFPA 805 Cases 1
and 2 6. Inputs used for NFPA 805 Case 3 in the TVA Model and comparison with the inputs in SHEX long term suppression pool temperature response analysis for analyzing NFPA 805 Cases 1 and 2
- 7. Explain how the Adder 5.9 oF, given in response to SCVB-RAI-12(b), for the change in suppression pool temperature was calculated (B) Perform the NFPA 805 Case 3 analysis using General Electric-Hitachi Super Hex (SHEX) code using the same inputs and assumptions as in Case 1 and Case 2, Residual Heat Removal (RHR) heat exchanger k- factor of 270 BTU/sec-°F, and RHR Service Water (RHRSW) initiation time 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. Provide results of peak suppression pool temperature, minimum Net Positive Suction Head (NPSH) available (NPSHa), and the margin between the NPSHa and NPSH required (NPSHr).
REFERENCE
- 1. Letter from TVA to NRC dated December 17, 2014, "Response to NRC Request for Additional Information Regarding the License Amendment Request to Adopt NFPA 805 Performance-Based Standard for Fire Protection for Light Water Reactor Electric Generating Plants for the Browns Ferry Nuclear Plant, Units 1, 2, and 3 (TAC Nos. MF1185, MF1186, and MF1187) - Probabilistic Risk Assessment Follow Up (162-Day Responses)", (ADAMS Accession No. ML14363A056).
Thanks, Farideh Farideh E. Saba, P.E.
Senior Project Manager NRC/ADRO/NRR/DORL 301-415-1447 Mail Stop O-8G9A Farideh.Saba@NRC.GOV
Hearing Identifier: NRR_PMDA Email Number: 1891 Mail Envelope Properties (36CF286628C20846A68047F2463233090141FFBC09C5)
Subject:
Follow up RAI regarding Attachment X of NFPA 805 LAR Sent Date: 2/21/2015 4:05:31 PM Received Date: 2/21/2015 4:05:00 PM From: Saba, Farideh Created By: Farideh.Saba@nrc.gov Recipients: "Schrull, Edward Dustin (edschrull@tva.gov)" <edschrull@tva.gov> Tracking Status: None "Green, Kimberly" <Kimberly.Green@nrc.gov>
Tracking Status: None "Sallman, Ahsan" <Ahsan.Sallman@nrc.gov> Tracking Status: None "Miller, Barry" <Barry.Miller@nrc.gov> Tracking Status: None "Helton, Shana" <Shana.Helton@nrc.gov> Tracking Status: None "Williams, Gordon Robert (grwilliams1@tva.gov)" <grwilliams1@tva.gov> Tracking Status: None
Post Office: HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 4231 2/21/2015 4:05:00 PM
Options Priority: High Return Notification: No Reply Requested: Yes Sensitivity: Normal Expiration Date: Recipients Received: