ML19071A352: Difference between revisions
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| number = ML19071A352 | | number = ML19071A352 | ||
| issue date = 03/12/2019 | | issue date = 03/12/2019 | ||
| title = | | title = NRR E-mail Capture - (External_Sender) State Consultation: Request for Comments on License Amendments to Modify Sequoyah Nuclear Plant Essential Raw Cooling Water Motor Control Center Breakers and to Revise the Updated FSAR | ||
| author name = Ruben C | | author name = Ruben C | ||
| author affiliation = State of TN | | author affiliation = State of TN | ||
| Line 18: | Line 18: | ||
=Text= | =Text= | ||
{{#Wiki_filter:**}} | {{#Wiki_filter:NRR-DMPSPEm Resource From: Ruben Crosslin <Ruben.Crosslin@tn.gov> | ||
Sent: Tuesday, March 12, 2019 7:41 AM To: Lee, Samson Cc: Debra Shults; Anthony Hogan; Hon, Andrew | |||
==Subject:== | |||
[External_Sender] RE: State Consultation: Request for Comments on License Amendments to modify Sequoyah Nuclear Plant essential raw cooling water motor control center breakers and to revise the Updated Final Safety Analysis Report (SQN-TS-17-04) (EPID:... | |||
State of Tennessee (Division of Radiological Health comment: We strongly prefer the mechanical interlock system over the administrative control upon installation of the new feeder breakers, though we are not opposed to the concept of administrative controls. | |||
Our comment is based on our understanding of the following: | |||
* The new breakers upon installation are not compatible with the existing interlock system. | |||
* In the event that the administrative controls are not effective, TVAs contention is that The effects of circulating currents are minimized in this case, due to the high impedance of the connection and similarity/symmetry of the circuit design. | |||
From: Lee, Samson [mailto:Samson.Lee@nrc.gov] | |||
Sent: Thursday, March 07, 2019 1:30 PM To: Ruben Crosslin Cc: Debra Shults; Anthony Hogan; Hon, Andrew | |||
==Subject:== | |||
State Consultation: Request for Comments on License Amendments to modify Sequoyah Nuclear Plant essential raw cooling water motor control center breakers and to revise the Updated Final Safety Analysis Report (SQN-TS-17-04) | |||
(EPID: L-2018-LLA-0060) | |||
==Dear Mr. Crosslin,== | |||
The NRC is finalizing the subject license amendments for Sequoyah Nuclear Plant (SQN), Units 1 and 2. In accordance with Title 10 of the Code of Federal Regulations, Section 50.91(b), we are notifying you of the proposed issuance of these amendments. SQN has implemented a design change to remove the existing mechanical (Kirk Key) interlocking scheme from the feeder breakers and tie breakers for Essential Raw Cooling Water (ERCW) Motor Control Centers (MCCs) 1A-A and 2A-A. The amendments approve TVA to complete the implementation of the design change to remove the mechanical interlock device from the feeder breakers and tie breakers from the ERCW MCCs 1B-B and 2B-B and to revise the ERCW System Description in Section 9.2.2.2 of the SQN Updated Final Safety Analysis Report (UFSAR) to describe the normal and alternate power sources for the ERCW system. | |||
The amendment request was published in the Federal Register on June 5, 2018 (83 FR 26107). No public comments were received. | |||
Please let us know, if you have any comments on behalf of the State of Tennessee for the above amendments. Please contact me if you have any questions. | |||
: Regards, Sam Lee, Project Manager 1 | |||
Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation 301-415-3168 2 | |||
Hearing Identifier: NRR_DMPS Email Number: 854 Mail Envelope Properties (SN6PR09MB31657F423607D72855B3B261E5490) | |||
==Subject:== | |||
[External_Sender] RE: State Consultation: Request for Comments on License Amendments to modify Sequoyah Nuclear Plant essential raw cooling water motor control center breakers and to revise the Updated Final Safety Analysis Report (SQN-TS-17-04) (EPID:... | |||
Sent Date: 3/12/2019 7:40:31 AM Received Date: 3/12/2019 7:40:37 AM From: Ruben Crosslin Created By: Ruben.Crosslin@tn.gov Recipients: | |||
"Debra Shults" <Debra.Shults@tn.gov> | |||
Tracking Status: None "Anthony Hogan" <Anthony.Hogan@tn.gov> | |||
Tracking Status: None "Hon, Andrew" <Andrew.Hon@nrc.gov> | |||
Tracking Status: None "Lee, Samson" <Samson.Lee@nrc.gov> | |||
Tracking Status: None Post Office: SN6PR09MB3165.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 2395 3/12/2019 7:40:37 AM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: | |||
Recipients Received:}} | |||
Latest revision as of 22:13, 1 December 2019
| ML19071A352 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 03/12/2019 |
| From: | Ruben C State of TN |
| To: | Samson Lee Plant Licensing Branch 1 |
| References | |
| L-2018-LLA-0060 | |
| Download: ML19071A352 (3) | |
Text
NRR-DMPSPEm Resource From: Ruben Crosslin <Ruben.Crosslin@tn.gov>
Sent: Tuesday, March 12, 2019 7:41 AM To: Lee, Samson Cc: Debra Shults; Anthony Hogan; Hon, Andrew
Subject:
[External_Sender] RE: State Consultation: Request for Comments on License Amendments to modify Sequoyah Nuclear Plant essential raw cooling water motor control center breakers and to revise the Updated Final Safety Analysis Report (SQN-TS-17-04) (EPID:...
State of Tennessee (Division of Radiological Health comment: We strongly prefer the mechanical interlock system over the administrative control upon installation of the new feeder breakers, though we are not opposed to the concept of administrative controls.
Our comment is based on our understanding of the following:
- The new breakers upon installation are not compatible with the existing interlock system.
- In the event that the administrative controls are not effective, TVAs contention is that The effects of circulating currents are minimized in this case, due to the high impedance of the connection and similarity/symmetry of the circuit design.
From: Lee, Samson [1]
Sent: Thursday, March 07, 2019 1:30 PM To: Ruben Crosslin Cc: Debra Shults; Anthony Hogan; Hon, Andrew
Subject:
State Consultation: Request for Comments on License Amendments to modify Sequoyah Nuclear Plant essential raw cooling water motor control center breakers and to revise the Updated Final Safety Analysis Report (SQN-TS-17-04)
Dear Mr. Crosslin,
The NRC is finalizing the subject license amendments for Sequoyah Nuclear Plant (SQN), Units 1 and 2. In accordance with Title 10 of the Code of Federal Regulations, Section 50.91(b), we are notifying you of the proposed issuance of these amendments. SQN has implemented a design change to remove the existing mechanical (Kirk Key) interlocking scheme from the feeder breakers and tie breakers for Essential Raw Cooling Water (ERCW) Motor Control Centers (MCCs) 1A-A and 2A-A. The amendments approve TVA to complete the implementation of the design change to remove the mechanical interlock device from the feeder breakers and tie breakers from the ERCW MCCs 1B-B and 2B-B and to revise the ERCW System Description in Section 9.2.2.2 of the SQN Updated Final Safety Analysis Report (UFSAR) to describe the normal and alternate power sources for the ERCW system.
The amendment request was published in the Federal Register on June 5, 2018 (83 FR 26107). No public comments were received.
Please let us know, if you have any comments on behalf of the State of Tennessee for the above amendments. Please contact me if you have any questions.
- Regards, Sam Lee, Project Manager 1
Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation 301-415-3168 2
Hearing Identifier: NRR_DMPS Email Number: 854 Mail Envelope Properties (SN6PR09MB31657F423607D72855B3B261E5490)
Subject:
[External_Sender] RE: State Consultation: Request for Comments on License Amendments to modify Sequoyah Nuclear Plant essential raw cooling water motor control center breakers and to revise the Updated Final Safety Analysis Report (SQN-TS-17-04) (EPID:...
Sent Date: 3/12/2019 7:40:31 AM Received Date: 3/12/2019 7:40:37 AM From: Ruben Crosslin Created By: Ruben.Crosslin@tn.gov Recipients:
"Debra Shults" <Debra.Shults@tn.gov>
Tracking Status: None "Anthony Hogan" <Anthony.Hogan@tn.gov>
Tracking Status: None "Hon, Andrew" <Andrew.Hon@nrc.gov>
Tracking Status: None "Lee, Samson" <Samson.Lee@nrc.gov>
Tracking Status: None Post Office: SN6PR09MB3165.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 2395 3/12/2019 7:40:37 AM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:
Recipients Received: