ML18269A357

NRR E-mail Capture - Request for Additional Information Monticello License Amendment Request to Adopt TSTF-425

ML18269A357
Person / Time
Site:	Monticello
Issue date:	09/26/2018
From:	Robert Kuntz Plant Licensing Branch III
To:	Scott S Northern States Power Company, Minnesota
References
Download: ML18269A357 (3)

Text

NRR-DMPSPEm Resource From: Kuntz, Robert Sent: Wednesday, September 26, 2018 9:19 AM To: 'Scott, Sara'

Subject:

Request for Additional Information RE: Monticello license amendment request to adopt TSTF-425 By letter dated December 19, 2017 (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML17353A189) as supplemented in letter dated April 24, 2018 (ADAMS Accession No. ML18114A401), Northern States Power Company, a Minnesota corporation (NSPM), submitted a license amendment request (LAR) to adopt Technical Specification Change Traveler-425 Revision 3, for the Monticello Nuclear Generating Plant (MNGP). The NRC staff has reviewed the LAR submitted by NSPM and determined that additional information is required in order to complete the review. The following is a request for additional information (RAI). As discussed during a clarification call on September 26, 2018, a response to the RAI is expected by October 26, 2018.

Robert Kuntz Senior Project Manager (Monticello and Prairie Island)

NRC/NRR/DORL/LPL3 (301)415-3733 REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO ADOPT TECHNICAL SPECIFICATION CHANGE TRAVELER-425, REVISION 3, RELOCATE SURVEILLANCE FREQUENCIES TO LICENSEE CONTROL - RISK INFORMED TECHNICAL SPECIFICATION TASK FORCE INITIATIVE 5B NORTHERN STATES POWER COMPANY MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO. 50-263 RAI 01 - LAR Attachment 2, MNGP Open Fire PRA Peer Review Findings The LAR Attachment 2, Table 2-1, MNGP Open Fire PRA Peer Review Findings, provides resolutions for the open facts and observations (F&Os) from the full-scope 2015 and focused-scope 2017 Fire PRA (FPRA) peer reviews that were not closed by the October 2017 Finding Closure Review.

For F&O 2-5, the peer review team stated the influencing factors assigned in the FPRA model were based on engineering judgement and a set of rules documented in Section 5.6.2 of the Ignition Frequency Notebook.

The peer review team further stated that the influencing factors assigned resulted in comparatively low values (i.e., averaging much less than 3). The resolution of this F&O indicates, in part, that a better justification of application of a very low factor in two compartments needs to be provided. As related to F&O 2-5, of the MNGP submittal, dated March 28, 2018, (ADAMS Accession No. ML18087A323) for the implementation of a program related to 10 CFR 50.69 further indicates that the compartments 8 and 33 were assigned very low influencing factors.

The update for treatment of influence factors for the two fire compartment areas, compartments 8 and 33, which were assigned very low influencing factors, could have an impact on this risk-informed application.

Additionally, Frequently Asked Question (FAQ) 12-0064, Close-Out of National Fire Protection Association 1

805 Frequently Asked Question 12-0064 on Hot Work/Transient Fire Frequency Influence Factors (ADAMS Accession No. ML12346A488), provides related guidance for consideration in the use of influencing factors in an FPRA.

EITHER

a. Provide justification for why the treatment (use of the influencing factors) used in the MNGP FPRA for fire compartments 8 and 33 is appropriate for this application (e.g., explain how the influencing factors used for fire compartments 8 and 33 are consistent with or bound the guidance in FAQ 12-0064; discuss the results of a sensitivity analysis that confirms the F&O will have negligible impact on the surveillance test interval (STI) evaluations).

OR

b. If justification to confirm the influencing factors used for fire compartments 8 and 33 cannot be provided, propose a mechanism that ensures F&O 2-5 will be resolved for supporting requirement IGN-A7 at Capability Category (CC) II, consistent with the NEI 04-10 guidance. The proposed mechanism should ensure the activities and changes associated with F&O 2-5 will be completed, appropriately reviewed, and any issues resolved prior to any future STI evaluations. Additionally, this mechanism should specify how F&O 2-5 will be resolved in the PRA (e.g., provide an explicit description or a reference to the appropriate section of the LAR). An example would be a table of listed implementation items referenced in a license condition.

2

Hearing Identifier: NRR_DMPS Email Number: 588 Mail Envelope Properties (BN6PR09MB1507010481C0CD2A413443DA99150)

Subject:

Request for Additional Information RE: Monticello license amendment request to adopt TSTF-425 Sent Date: 9/26/2018 9:19:25 AM Received Date: 9/26/2018 9:19:25 AM From: Kuntz, Robert Created By: Robert.Kuntz@nrc.gov Recipients:

"'Scott, Sara'" <Sara.Scott@xenuclear.com>

Tracking Status: None Post Office: BN6PR09MB1507.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 4122 9/26/2018 9:19:25 AM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received: