ML092720772: Difference between revisions

From kanterella
Jump to navigation Jump to search
(Created page by program invented by StriderTol)
 
(StriderTol Bot change)
 
(3 intermediate revisions by the same user not shown)
Line 2: Line 2:
| number = ML092720772
| number = ML092720772
| issue date = 10/02/2009
| issue date = 10/02/2009
| title = Sequoyah Nuclear Plant, Units 1 and 2 - Request for Additional Information Regarding the Upgrade of Emergency Core Cooling System Requirements Per NUREG-1431 (TAC No. ME1115 and ME1116)
| title = Request for Additional Information Regarding the Upgrade of Emergency Core Cooling System Requirements Per NUREG-1431
| author name = Lingam S P
| author name = Lingam S
| author affiliation = NRC/NRR/DORL/LPLII-2
| author affiliation = NRC/NRR/DORL/LPLII-2
| addressee name = Swafford P D
| addressee name = Swafford P
| addressee affiliation = Tennessee Valley Authority
| addressee affiliation = Tennessee Valley Authority
| docket = 05000327, 05000328
| docket = 05000327, 05000328
Line 18: Line 18:


=Text=
=Text=
{{#Wiki_filter:UNITED NUCLEAR REGULATORY WASHINGTON, D.C. 20555-0001 October 2, 2009 Mr. Preston D.
{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 2, 2009 Mr. Preston D. Swafford Chief Nuclear Officer and Executive Vice President Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 SUB~IECT:      SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING THE UPGRADE OF EMERGENCY CORE COOLING SYSTEM REQUIREMENTS PER NUREG-1431 (TAC NOS. ME1115 AND ME1116)
Swafford Chief Nuclear Officer and Executive Vice President Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 -
REQUEST FOR ADDITIONAL INFORMATION REGARDING THE UPGRADE OF EMERGENCY CORE COOLING SYSTEM REQUIREMENTS PER NUREG-1431 (TAC NOS.
ME1115 AND ME1116)  


==Dear Mr. Swafford:==
==Dear Mr. Swafford:==
By letter dated April 21, 2009, and supplemented by letter dated September 8, 2009, you submitted an application for license amendment to revise the Sequoyah Nuclear Plant, Units 1 and 2 (SQN) Technical Specifications (TSs), and upgrade the Emergency Core Cooling System (ECCS) requirements to be more consistent with NUREG-1431, Revision 3, "Standard Technical Specifications  
 
-Westinghouse Plants." The upgrade revises SQN TS Section 3/4.5.2, "ECCS Subsystems -Tav9 Greater Than or Equal to 350 "F." TS Section 3/4.5.3, "ECCS Tav9 Less Than 350 "F." and the corresponding surveillance requirements (SRs) that will resolve a nonconforming condition associated with SR 4.5.2.f.
By letter dated April 21, 2009, and supplemented by letter dated September 8, 2009, you submitted an application for license amendment to revise the Sequoyah Nuclear Plant, Units 1 and 2 (SQN) Technical Specifications (TSs), and upgrade the Emergency Core Cooling System (ECCS) requirements to be more consistent with NUREG-1431, Revision 3, "Standard Technical Specifications - Westinghouse Plants." The upgrade revises SQN TS Section 3/4.5.2, "ECCS Subsystems - T av9 Greater Than or Equal to 350 "F." TS Section 3/4.5.3, "ECCS SUbsystems T av9 Less Than 350 "F." and the corresponding surveillance requirements (SRs) that will resolve a nonconforming condition associated with SR 4.5.2.f.
The Nuclear Regulatory Commission staff is reviewing the submittal and has determined that additional information is required to complete its evaluation.
The Nuclear Regulatory Commission staff is reviewing the submittal and has determined that additional information is required to complete its evaluation. This request was discussed with Mr. Fred Mashburn of your staff on September 29, 2009, and it was agreed that a response would be provided by October 9,2009.
This request was discussed with Mr. Fred Mashburn of your staff on September 29, 2009, and it was agreed that a response would be provided by October 9,2009. If you have any questions regarding this matter, I can be reached at 301-415-1564.
If you have any questions regarding this matter, I can be reached at 301-415-1564.
Sincerely, Siva P. Lingam, Project Manager Plant Licensing Branch 11-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-327 and 50-328  
Sincerely,
                                                ~fj'~.
Siva P. Lingam, Project Manager Plant Licensing Branch 11-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-327 and 50-328


==Enclosure:==
==Enclosure:==
Request for Additional Information cc w/encl: Distribution via Listserv


Request for Additional Information cc w/encl:
REQUEST FOR ADDITIONAL INFORMATION REGARDING TECHNICAL SPECIFICATION CHANGES AND UPGRADE OF EMERGENCY CORE COOLING SYSTEM REQUIREMENTS PER NUREG-1431, REVISION 3 SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 DOCKET NOS. 50-327 AND 50-328 By letter dated April 21, 2009 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML091120193), and supplemented by letter dated September 8,2009 (ADAMS Accession No. ML092530721), the Tennessee Valley Authority (the licensee),
Distribution via Listserv REQUEST FOR ADDITIONAL INFORMATION REGARDING TECHNICAL SPECIFICATION CHANGES AND UPGRADE OF EMERGENCY CORE COOLING SYSTEM REQUIREMENTS PER NUREG-1431, REVISION 3 SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 DOCKET NOS. 50-327 AND 50-328 By letter dated April 21, 2009 (Agencywide Documents Access and Management (ADAMS) Accession No. ML091120193), and supplemented by letter dated September (ADAMS Accession No. ML092530721), the Tennessee Valley Authority (the submitted a license amendment request to revise the Sequoyah Nuclear Plant, Units 1 and (SQN) Technical Specifications (TSs) and upgrade the Emergency Core Cooling (ECCS) requirements to be more consistent with NUREG-1431, Revision 3, "Standard Specifications  
submitted a license amendment request to revise the Sequoyah Nuclear Plant, Units 1 and 2 (SQN) Technical Specifications (TSs) and upgrade the Emergency Core Cooling System (ECCS) requirements to be more consistent with NUREG-1431, Revision 3, "Standard Technical Specifications - Westinghouse Plants." The upgrade revises SQN TS Section 3/4.5.2, "ECCS Subsystems - Tavg Greater Than or Equal to 350 "F," TS Section 3/4.5.3, "ECCS Subsystems T avg Less Than 350 "F," and the corresponding surveillance requirements (SRs) that will resolve a nonconforming condition associated with SR 4.5.2.f. In order to complete its review of the above documents, the Nuclear Regulatory Commission (NRC) staff needs the following additional information:
-Westinghouse Plants." The upgrade revises SQN TS Section 3/4.5.2, Subsystems -Tavg Greater Than or Equal to 350 "F," TS Section 3/4.5.3, "ECCS Tavg Less Than 350 "F," and the corresponding surveillance requirements (SRs) that will a nonconforming condition associated with SR 4.5.2.f. In order to complete its review of above documents, the Nuclear Regulatory Commission (NRC) staff needs the additional On page E-11 of the licensee's letter dated April 21, 2009, it is noted that new action b TS 3.5.3 is less restrictive than current requirements because it will allow an extra 3 hours the plant to be in Mode 4 when the required ECCS centrifugal charging pump is There is no technical justification provided for this extra Provide justification for the extra 3 hours for the plant to be in Mode 4 when the required ECCS centrifugal charging pump is inoperable.
On page E-11 of the licensee's letter dated April 21, 2009, it is noted that new action b of TS 3.5.3 is less restrictive than current requirements because it will allow an extra 3 hours for the plant to be in Mode 4 when the required ECCS centrifugal charging pump is inoperable.
Enclosure
There is no technical justification provided for this extra time.
: 1. Provide justification for the extra 3 hours for the plant to be in Mode 4 when the required ECCS centrifugal charging pump is inoperable.
Enclosure


ML092720772 "transmitted bv memo dated OFFICE LPL2-2/PM LPL2-2/LA NRR/DIRS/ITSB/BC LPL2-2/BC NAME SLinaam CSoia RElliott TBovce DATE 10101/09 10101/09 914/09* 10102/09}}
ML092720772                                 "transmitted bv memo dated OFFICE           LPL2-2/PM         LPL2-2/LA           NRR/DIRS/ITSB/BC         LPL2-2/BC NAME             SLinaam           CSoia               RElliott                 TBovce DATE             10101/09           10101/09             914/09*                 10102/09}}

Latest revision as of 22:37, 21 March 2020

Request for Additional Information Regarding the Upgrade of Emergency Core Cooling System Requirements Per NUREG-1431
ML092720772
Person / Time
Site: Sequoyah  Tennessee Valley Authority icon.png
Issue date: 10/02/2009
From: Siva Lingam
Plant Licensing Branch II
To: Swafford P
Tennessee Valley Authority
Lingam, S NRR/DORL 415-1564
References
TAC ME1115, TAC ME1116
Download: ML092720772 (3)
v • d • e


Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 2, 2009 Mr. Preston D. Swafford Chief Nuclear Officer and Executive Vice President Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 SUB~IECT: SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING THE UPGRADE OF EMERGENCY CORE COOLING SYSTEM REQUIREMENTS PER NUREG-1431 (TAC NOS. ME1115 AND ME1116)

Dear Mr. Swafford:

By letter dated April 21, 2009, and supplemented by letter dated September 8, 2009, you submitted an application for license amendment to revise the Sequoyah Nuclear Plant, Units 1 and 2 (SQN) Technical Specifications (TSs), and upgrade the Emergency Core Cooling System (ECCS) requirements to be more consistent with NUREG-1431, Revision 3, "Standard Technical Specifications - Westinghouse Plants." The upgrade revises SQN TS Section 3/4.5.2, "ECCS Subsystems - T av9 Greater Than or Equal to 350 "F." TS Section 3/4.5.3, "ECCS SUbsystems T av9 Less Than 350 "F." and the corresponding surveillance requirements (SRs) that will resolve a nonconforming condition associated with SR 4.5.2.f.

The Nuclear Regulatory Commission staff is reviewing the submittal and has determined that additional information is required to complete its evaluation. This request was discussed with Mr. Fred Mashburn of your staff on September 29, 2009, and it was agreed that a response would be provided by October 9,2009.

If you have any questions regarding this matter, I can be reached at 301-415-1564.

Sincerely,

~fj'~.

Siva P. Lingam, Project Manager Plant Licensing Branch 11-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-327 and 50-328

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION REGARDING TECHNICAL SPECIFICATION CHANGES AND UPGRADE OF EMERGENCY CORE COOLING SYSTEM REQUIREMENTS PER NUREG-1431, REVISION 3 SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 DOCKET NOS. 50-327 AND 50-328 By letter dated April 21, 2009 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML091120193), and supplemented by letter dated September 8,2009 (ADAMS Accession No. ML092530721), the Tennessee Valley Authority (the licensee),

submitted a license amendment request to revise the Sequoyah Nuclear Plant, Units 1 and 2 (SQN) Technical Specifications (TSs) and upgrade the Emergency Core Cooling System (ECCS) requirements to be more consistent with NUREG-1431, Revision 3, "Standard Technical Specifications - Westinghouse Plants." The upgrade revises SQN TS Section 3/4.5.2, "ECCS Subsystems - Tavg Greater Than or Equal to 350 "F," TS Section 3/4.5.3, "ECCS Subsystems T avg Less Than 350 "F," and the corresponding surveillance requirements (SRs) that will resolve a nonconforming condition associated with SR 4.5.2.f. In order to complete its review of the above documents, the Nuclear Regulatory Commission (NRC) staff needs the following additional information:

On page E-11 of the licensee's letter dated April 21, 2009, it is noted that new action b of TS 3.5.3 is less restrictive than current requirements because it will allow an extra 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> for the plant to be in Mode 4 when the required ECCS centrifugal charging pump is inoperable.

There is no technical justification provided for this extra time.

1. Provide justification for the extra 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> for the plant to be in Mode 4 when the required ECCS centrifugal charging pump is inoperable.

Enclosure

ML092720772 "transmitted bv memo dated OFFICE LPL2-2/PM LPL2-2/LA NRR/DIRS/ITSB/BC LPL2-2/BC NAME SLinaam CSoia RElliott TBovce DATE 10101/09 10101/09 914/09* 10102/09

Retrieved from "https://kanterella.com/w/index.php?title=ML092720772&oldid=2652110"