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NEI Slides for ROP Public Meeting Sept 2024
	ML24267A003
Person / Time
Site:	Nuclear Energy Institute
Issue date:	09/25/2024
From:	; Nuclear Energy Institute
To:	Brian Benney; NRC/NRR/DRO/IOEB
References
	NEI 99-02, Rev 8
	Download: ML24267A003 (1)
	v • d • e

NEI 99-02, Rev. 8

ROP Public Meeting

Sept 25, 2024

Provide update on NEI 99-02 rev. 8

Since revision 7 was issued in 2013 Over 50 FAQs have been dispositioned*

1 White Paper approved, AP1000 (included in rev. 8)

SECY 0010 approved to replace the ANS PI with ERFER PI (FAQ 22- 01)

More recently 2 NRC public workshops conducted 23 NRC staff review comments dispositioned (ML24074A472)

The current list of approved FAQs can be found on the NRC website.

Replaced references to Consolidated Data Entry (CDE) with Industry Reporting and Information System (IRIS) throughout Incorporated definition of concurrent failure Additional clarity added to the Unplanned Scram with Complications Section

Added definition of initial transient

Updated criteria to account for AP1000 design differences

Updated BWR question for verifying rod position

Clarified use of SRVs for pressure control following the initial transient

Clarified conditions for meeting MFW availability

Add clarity to unplanned power changes when addressing unrelated issues during planned power reductions Added new plant specific FAQs Major reformatting of MSPI section including App. F & G Major reformatting/rewrite of EP section including retirement of ANS PI and addition of new ERFER PI*

ERFER PI pilot reporting began 1Q2024.

Removed proposed examples of unplanned scrams and exceptions described in IE white paper

To be discussed later

Complete updates & submit NEI 99-02 rev. 8 to NRC for final review Implement NEI 99-02 rev. 8 (ECD fall 2024)

ROP Public Meeting

Sept 25, 2024

White paper submitted to NRC to provide recommended clarifications to NEI 99- 02, unplanned scrams per 7000 critical hours PI. (ML24185A209)

Discussed at NEI 99- 02 public meeting on Aug 28th for consideration in rev. 8.

Clarify when manual scrams are used as part of a normal reactor shutdown sequence.

After removing the main generator from the electrical grid to shutdown the reactor versus reaching manual or automatic scram criteria because of a transient/required action.

As part of main turbine post maintenance testing following major maintenance to address expected rubs/vibrations versus as a response to equipment failures.

Examples pulled from NEI 99-02 draft rev. 8 based on NRC questions/comments discussed at the public meeting.

Subject of a future public meeting/workshops (late 4th quarter or early 1st quarter 2025) to discuss white paper and other examples after rev. 8 is issued.

Potential outcomes provided alignment is reached.

Additional clarification and descriptions for unplanned scrams under the IE cornerstone section

New appendix similar to App. H, USwC Basis Document, that provides more details and supporting information/examples.

Improved guidance when exceptions should be pursued/considered based on certain criteria and situations that may be encountered.

ML24267A003

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