Letter Sequence Approval |
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Results
Other: ML102150123, ML102150124, ML102150125, ML102150126, ML102150127, ML102150128, NRC-09-0022, Proposed License Amendment to Revise the Degraded Voltage Function Requirements of Technical Specification Table 3.3.8.1-1 to Reflect Undervoltage Backfit Modification, NRC-10-0006, Drawing EDP-35621.B006, Rev. a, Document Schematic Diagram, 4160V Ess Buses 65E & 65F, Load Shedding Strings, NRC-10-0006, Drawing EDP-35621.B006, Rev. a, Document Schematic Diagram, 4160V Ess Buses 65E & 65F, Load Shedding Strings.
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MONTHYEARNRC-09-0022, Proposed License Amendment to Revise the Degraded Voltage Function Requirements of Technical Specification Table 3.3.8.1-1 to Reflect Undervoltage Backfit Modification2009-06-10010 June 2009
Proposed License Amendment to Revise the Degraded Voltage Function Requirements of Technical Specification Table 3.3.8.1-1 to Reflect Undervoltage Backfit Modification
Project stage: Other
ML0919504402009-07-13013 July 2009
Proposed LAR to Revise Degraded Voltage Function Requirements of TS Table 3.3.8.1-1 to Reflect Undervoltage Backfit Modification - ME1477
Project stage: Approval
ML0920902312009-07-27027 July 2009
Email Fermi 2 LAR - Degraded Voltage Function - ME1477
Project stage: Approval
ML0930702942009-09-16016 September 2009
Response to Request for Additional Information Regarding the Proposed License Amendment to Revise the Degraded Voltage Function Requirements of Technical Requirements of TS Table 3.3.8.1-1 to Reflect Undervoltage Backfit Modification
Project stage: Response to RAI
ML0934900042009-12-14014 December 2009
E-mail to A. Hassoun and R. W. Johnson - LAR to Revise Degraded Voltage Function Requirements of TS Table 3.3.8.1-1 to Reflect Undervoltage Backfit Modification
Project stage: Approval
ML1003506682010-02-24024 February 2010
RAI, Amendment Request to Revise the Degraded Voltage Function in the TS Table 3.3.8.1-1, ME1477
Project stage: RAI
ML1021501232010-07-14014 July 2010
Design Calculation Cover Sheet, DC-0919 Vol 1 DCD 1, Rev. 0, Undervoltage Relays Setpoints
Project stage: Other
ML1021501262010-07-23023 July 2010
Drawing EDP-35621.B011, Rev. a, Functional Logic Diagram Operation of Power Line Feed & Tie Breakers 4160V Busses 65E & 13EC
Project stage: Other
NRC-10-0006, Drawing EDP-35621.B006, Rev. a, Document Schematic Diagram, 4160V Ess Buses 65E & 65F, Load Shedding Strings2010-07-23023 July 2010
Drawing EDP-35621.B006, Rev. a, Document Schematic Diagram, 4160V Ess Buses 65E & 65F, Load Shedding Strings
Project stage: Other
NRC-10-0006, Drawing EDP-35621.B006, Rev. a, Document Schematic Diagram, 4160V Ess Buses 65E & 65F, Load Shedding Strings.2010-07-23023 July 2010
Drawing EDP-35621.B006, Rev. a, Document Schematic Diagram, 4160V Ess Buses #65E & 65F, Load Shedding Strings.
Project stage: Other
ML1021501242010-07-23023 July 2010
Drawing EDP-35621.B009, Rev. a, Functional Logic Diagram, Operation of Power Line Feed & Tie Breakers, 4160V Buses 64B & 11EA
Project stage: Other
ML1021501252010-07-23023 July 2010
Drawing EDP-35621.B010, Rev. a, Functional Logic Diagram. Operation of Power Line Feed & Tie Breakers, 4160V Busses 64C & 12EB
Project stage: Other
ML1021501272010-07-23023 July 2010
Drawing EDP-35621.B012, Rev. a, Functional Logic Diagram, Operation of Power Line Feed & Tie Breaker 4160V Buses 65F & 14ED
Project stage: Other
ML1021501282010-07-23023 July 2010
Drawing EDP-35621.B005, Rev. a, Document Schematic Diagram, 4160V Ess Buses 64B & 64C - Load Shedding Strings
Project stage: Other
ML1021404292010-07-23023 July 2010
Response to Request for Additional Information Regarding the Proposed License Amendment to Revise the Degraded Voltage Function Requirements of Technical Specification Table 3.3.8.1-1 to Reflect Undervoltage Backfit Modification
Project stage: Response to RAI
ML1027701152010-09-27027 September 2010
Degraded Voltage Setpoint As-Found Values
Project stage: Request
NRC-10-0073, Transmittal of Revised Design Calculations for Setpoint Evaluation of Degraded Voltage Functions in Technical Specification Table 3.3.8.1-12010-10-0404 October 2010
Transmittal of Revised Design Calculations for Setpoint Evaluation of Degraded Voltage Functions in Technical Specification Table 3.3.8.1-1
Project stage: Request
ML1027703822010-10-20020 October 2010
Issuance of Amendment to Revise Degraded Voltage Function to Reflect Modification
Project stage: Approval
2010-10-20
[Table View] |
Similar Documents at Fermi |
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Text
From:
Chawla, Mahesh Sent:
Monday, July 27, 2009 4:49 PM To:
Alan I Hassoun Cc:
Goel, Vijay; Wilson, George; James, Lois; Wengert, Thomas
Subject:
Fermi 2 LAR - Degraded Voltage Function - ME1477 By letter dated June 10, 2009 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML091680379), Detroit Edition (the licensee) submitted a license amendment request (LAR) for Fermi 2 nuclear plant to revise the Degraded Voltage Function in the Technical Specification (TS) Table 3.3.8.1-1. Specifically, the proposed amendment is to add a new time delay logic associated with the degraded voltage function concurrent with a loss-of-coolant accident (LOCA).
The NRC staff has reviewed the information provided by the licensee. Please arrange a teleconference to discuss the following request for additional information with the NRC staff.
- 1. Provide summary and conclusions of the latest plant calculations/analysis, which justifies the voltage and time delay settings associated with the degraded voltage function. Provide basis of minimum switchyard voltage assumed in the calculations for the degraded voltage setpoints.
- 2. Describe and provide applicable logic diagrams to show how the degraded voltage function interfaces with emergency diesel generator (EDG) system, loss-of-coolant accident (LOCA) signal, and load sequencer.
- 3. The LAR states the amendment is for a degraded voltage concurrent [emphasis added]
with a LOCA.
- a. With the minimum switchyard voltage conditions during LOCA and with the new time delay logic of degraded voltage function, confirm all safety-related loads will successfully sequence to meet the requirement of accident mitigation without tripping the degraded voltage relays.
- b. If the degraded voltage relay trip occurs within 7.6 seconds to 8.4 seconds (proposed time delay settings) of the LOCA signal, explain how running loads will safely transfer to the EDG.
Mahesh Chawla Phone: 301-415-8371 Fax: 301-415-1222 mahesh.chawla@nrc.gov E-mail Properties
Mail Envelope Properties ()
Subject:
Fermi 2 LAR - Degraded Voltage Function - ME1477 Sent Date: 7/27/2009 4:46:51 PM Received Date: 7/27/2009 4:49:00 PM From: Chawla, Mahesh Created By: Mahesh.Chawla@nrc.gov Recipients:
hassouna@dteenergy.com (Alan I Hassoun)
Tracking Status: None Vijay.Goel@nrc.gov (Goel, Vijay)
Tracking Status: None George.Wilson@nrc.gov (Wilson, George)
Tracking Status: None Lois.James@nrc.gov (James, Lois)
Tracking Status: None Thomas.Wengert@nrc.gov (Wengert, Thomas)
Tracking Status: None Post Office:
Files Size Date & Time MESSAGE 11859 7/27/2009 Options Expiration Date:
Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received:
