ML22193A237

Request for Additional Information TSTF-589, Eliminate Automatic Diesel Generator Start During Shutdown

ML22193A237
Person / Time
Site:	Technical Specifications Task Force
Issue date:	07/12/2022
From:	Michelle Honcharik NRC/NRR/DSS/STSB
To:	Technical Specifications Task Force
Michelle H. NRR/DSS 301-415-1774
References
EPID L-2022-PMP-0000
Download: ML22193A237 (4)

Text

July 12, 2022 Technical Specifications Task Force 11921 Rockville Pike, Suite 100 Rockville, MD 20852

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION RE: TRAVELER TSTF-589, ELIMINATE AUTOMATIC DIESEL GENERATOR START DURING SHUTDOWN (EPID L 2022-PMP-0000)

Dear Members of the Technical Specifications Task Force:

By letter dated February 3, 2022 (ML22034A015), you submitted a request to the U.S. Nuclear Regulatory Commission (NRC) to incorporate Traveler TSTF-589, Eliminate Automatic Diesel Generator Start During Shutdown, into the standard technical specifications.

Upon review of the information provided, the NRC staff has determined that additional information is needed to complete the review. Mr. Brian Mann, Vice President of Industry Programs, EXCEL Services Corporation, agreed that the NRC staff will receive your response to the enclosed request for additional information questions within 30 calendar days of the date of this letter.

The review schedule that was provided in the acceptance letter dated March 8, 2022 (ML22062B336), has not changed.

MILESTONE SCHEDULE DATE Issue Draft Safety Evaluation March 30, 2023 Issue Final Safety Evaluation July 28, 2023 If you have any questions, please contact me at (301) 415-1774 or via e-mail to Michelle.Honcharik@nrc.gov.

Sincerely, Michelle C. Digitally signed by Michelle C. Honcharik Honcharik Date: 2022.07.13 20:17:14 -04'00' Michelle C. Honcharik, Senior Project Manager Technical Specifications Branch Division of Safety Systems Office of Nuclear Reactor Regulation Project No. 753

Enclosure:

Request for Additional Information cc: See next page

Technical Specifications Task Force Project 753 cc:

Technical Specifications Task Force c/o EXCEL Services Corporation 11921 Rockville Pike, Suite 100 Rockville, MD 20852 Attention: Brian D. Mann E-mail: brian.mann@excelservices.com Drew Richards STP Nuclear Operating Company 12090 FM 521 Mail Code: N5016 Wadsworth, TX 77483 Email: amrichards@stpegs.com Kevin Lueshen Constellation Energy Generation 4300 Winfield Road Warrenville IL 60555 Email: kevin.lueshen@constellation.com Jordan L. Vaughan Duke Energy EC07C / P.O. Box 1006 Charlotte, NC 28202 Email: jordan.vaughan@duke-energy.com Ryan M. Joyce Southern Nuclear Operating Company 3535 Colonnade Parkway / Bin N-274-EC Birmingham, AL 35243 Email: rmjoyce@southernco.com Wesley Sparkman Southern Nuclear Operating Company 3535 Colonnade Parkway / Bin N-226-EC Birmingham, AL 35242 Email: wasparkm@southernco.com

ML22193A237 *via e-mail NRR-106 OFFICE NRR/DSS/STSB/BC NRR/DSS/STSB/PM NAME VCusumano MHoncharik DATE 07/12/2022 07/12/2022 REQUEST FOR ADDITIONAL INFORMATION TECHNICAL SPECIFICATIONS TASK FORCE TSTF-589, "ELIMINATE AUTOMATIC DIESEL GENERATOR START DURING SHUTDOWN (EPID L-2022-PMP-0000)

By letter dated February 3, 2022 (ML22034A015), you submitted a request to the U.S. Nuclear Regulatory Commission (NRC) to incorporate Traveler TSTF-589, Eliminate Automatic Diesel Generator [DG] Start During Shutdown, into the standard technical specifications (STS). The proposed change eliminates the technical specifications requirements for automatic DG start and loading during shutdown. The proposed change affects the STS in NUREG-1430, NUREG-1431, and NUREG-1432. Upon review of the information provided, the NRC staff has determined that additional information is needed to complete the review.

1. Describe any hardware changes that may be required to distinguish a loss of offsite power (LOOP) between plant operating condition (Modes 1, 2, 3 and 4) and shutdown condition (Modes 5 and 6) so that a DG is not fast started if a LOOP occurs during Modes 5 or 6 condition. Describe any impact on the plant procedures that may be required to detect a LOOP, requiring a manual start of a DG during Modes 5 and 6.

2. Describe any hardware changes in the load sequencer that may be required to distinguish a LOOP between plant operating condition (Modes 1, 2, 3 and 4) and shutdown condition (Modes 5 and 6) so that automatic load sequencing does not occur during Modes 5 and 6.