ML18267A259

Final Revised Model Safety Evaluation of Traveler TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4B

ML18267A259
Person / Time
Site:	Technical Specifications Task Force
Issue date:	11/21/2018
From:	Cusumano V G NRC/NRR/DSS/STSB
To:
Honcharik M C, NRR/DSS, 301-415-1774
Shared Package
ML18269A041	List: ML18253A085 ML18267A259
References
TSTF-505 Rev. 2
Download: ML18267A259 (28)

Text

General Directions: This Model safety evaluation (SE) provides the format and content to be used when preparing the plant-specific SE of a license amendment request (LAR) to adopt

TSTF-505. The bolded bracketed information shows text that should be filled in for the specific amendment; individual licensees would furnish plant-specific nomenclature or values for these bracketed items. The italicized wording provides guidance on what should be included in each section and should not be included in the SE.

Federal Register{NOTE: The following 3 paragraphs are historical in nature, documenting the review of TSTF-505. They do not need to be included in the plant-specific SEs for LARs adopting TSTF-505.

The methodology is based on the Nuclear Energy Institute (NEI) Topical Report 06-09, Revision 0-A (hereafter referred to as NEI 06-09-A), "Risk-Informed Technical Specifications Initiative 4b, Risk-Managed Technical Specifications (RMTS) Guidelines," November 2006 (ADAMS Accession No. ML12286A322 (part of ADAMS Package Accession No. ML122860402)). The NEI developed the guidance in NEI 06-09-A as a methodology to evaluate and extend TS LCO Required Action Completion Times (CTs). The NRC staff's SE dated May 17, 2007 (ADAMS Accession No. ML071200238), found the guidance in NEI 06-09, Revision 0, to be acceptable, with clarification from the NRC staff positions, limitations, and conditions. In its letter dated October 12, 2012 (ADAMS Accession No. ML12286A321), which provided the NRC with NEI 06-09-A, the NEI stated that "[t]his version incorporates NRC's final safety evaluation, dated May 17, 2007, and is designated as the [']A['] version." The 93-page submittal (ADAMS Accession No. ML12286A322) included the entirety of the NRC's final SE (pdf page numbers 6/93 to 32/93 of ADAMS Accession No. ML12286A322), and NEI 06-09, Revision 0, November 2006 (pdf page numbers 33/93 to 93/93 of ADAMS Accession No. ML12286A322). The October 12, 2012, NEI letter did not include a marked-up version of NEI 06-09, Revision 0, that could have shown how NEI 06-09, Revision 0 needed to be changed to fit within the scope of the NRC's approval. This was in accordance with the process at the time.

The availability of TSTF-505, Revision 1, was announced in the Federal Register (77 FR 15399) on March 15, 2012. The NRC staff identified concerns with TSTF-505, Revision 1, during its review of plant-specific LARs requesting adoption of a RICT program. The NRC staff notified the TSTF of its concerns in a letter dated November 15, 2016, and suspended its approval of Revision 1 at that time (ADAMS Accession No. ML16281A021). Following a series of public meetings and teleconferences, the TSTF responded via letter dated September 27, 2017 (ADAMS Accession Package No. ML17290B229).

The NRC staff reviewed the changes described in the September 27, 2017, TSTF letter and developed a revised draft Model SE (ADAMS Accession No. ML17290A005). The TSTF subsequently submitted Traveler TSTF-505, Revision 2, based on the revised draft Model SE. Traveler TSTF-505, Revision 2, provides a model LAR that licensees should use to adopt TSTF-505. As part of TSTF-505, Revision 2, adoption, the licensee must follow NEI 06-09-A

guidance.}{NOTE: This paragraph may be used for facilities that have not converted to STS.}

{NOTE: The RICT is only applicable in MODES supported by the licensee's PRA. Licensees applying the RICT Program to MODES other than MODES 1 and 2 must demonstrate that they have the capability to calculate a RICT in those MODES or that the risk indicated by their MODES 1 and 2 PRA model is bounding with respect to the lower MODE conditions.}

OR In accordance with the

Risk Informed Completion Time Program

{The suggested format is LCO 3.X.X Title of LCO 3.X.X

• Required Action X.1 (Describe Condition)}

{NOTE: These are Conditions included in TSTF-505, Revision 2, which are applicable when one or more subsystems/channels are inoperable and there is no TS loss of function. The CT of these specific ACTIONS are modified to accommodate a RICT. Example:

LCO 3.x.x Title of LCO 3.x.x The existing ACTIONS requirement states:

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One or more [channel/subsystem/

train] inoperable. A.1 Restore [channel/ subsystem/train] to OPERABLE status.

[24 hours]

The revised ACTIONS requirement states:

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One or more [channel/subsystem/

train] inoperable. A.1 Restore [channel/ subsystem/train] to OPERABLE status.

[24 hours]

OR --------NOTE------------

Not applicable when

[all/two/four/both] required

[channel/subsystem/train]

are inoperable.

In accordance with the Risk Informed Completion Time Program

The suggested format is:

LCO 3.X.X Title of LCO 3.X.X

• Required Action X.1 (Describe Condition)}{NOTE: This SE uses the term "Configuration Risk Management Program" or "CRMP" to refer to the real-time risk assessment tool. These terms are used throughout RG 1.177 and NEI 06-09. The NRC staff recognizes that these terms are not used in TSTF-505, Revision 2, and some licensees have existing TS programs of that name that serve a different purpose. Licensees who already use these terms for another purpose in their TS can use an alternate term when adopting TSTF-505. They should define the alternate term in the LAR.} {NOTE: List any additional variations from TSTF-505, Revision 2.

The suggested format is:

LCO 3.X.X Title of LCO 3.X.X

• Required Action X.1 (Describe Condition)}

Code of Federal Regulations

Federal Register

{NOTE: This SE can only be used when there are no TS or PRA loss of function conditions included in the RICT program.}

{NOTE: This paragraph is only included if Section 3.1.2.2 is needed.}

{NOTE: Include this section of the SE if the licensee proposed to include instrumentation and control TS in the RICT Program.}

{NOTE: If using bracketed option, staff should consider making this a license condition, discussing it in the cover letter, and including it in the implementation requirements.}

{NOTE: The addition to TS Section 5 paragraph (e) requires that RICTs be calculated using NRC-accepted methods. The NRC documents acceptance of PRA methods in a number of different ways including plant-specific SEs, topical report SEs, facts and observations (F&O) closures, FAQs, and through the proposed vetting panel process.}

{NOTE: This section is to be prepared by the plant project manager.}

{NOTE: This section is to be prepared by the plant project manager in accordance with current procedures.}

{NOTE: This section is to be prepared by the plant project manager.}

{NOTE: Optional section to be prepared by the PM and primary reviewers. If document is publicly available, the ADAMS Accession No. should be listed for all references.}

{NOTE: These are the principal contributors for the model SE of the traveler. Replace these names with those you prepared the plant-specific SE.}