ML21243A076

Rulemaking: Proposed Rule: Preliminary Rule Language for the Part 53 Rulemaking: Subpart I - Maintaining and Revising Licensing Basis Information, Section 53.1322 - Evaluating Changes to Facility as Described in Final Safety Analysis Report

ML21243A076
Person / Time
Issue date:	08/31/2021
From:	Robert Beall NRC/NMSS/DREFS/RRPB
To:
Beall, Robert
Shared Package
ML20289A534	List: ML20289A556 ML20289A591 ML20311A004 ML20337A422 ML20337A432 ML20349A267 ML21012A278 ML21012A284 ML21042B855 ML21083A031 ML21095A165 ML21106A001 ML21106A002 ML21112A195 ML21145A028 ML21145A029 ML21145A035 ML21145A043 ML21145A047 ML21148A062 ML21148A173 ML21202A162 ML21202A175 ML21202A178 ML21225A224 ML21243A076 ML21267A004 ML21267A006 ML21270A005 ML21308A026 ML21308A028 ML21348A123 ML22024A066 ML22125A000 ML22145A000 ML22146A041 ML22146A045 ML22160A039 ML22165A265
References
10 CFR Part 53, NRC-2019-0062, RIN 3150-AK31
Download: ML21243A076 (2)

Text

THIS PRELIMINARY PROPOSED RULE LANGUAGE IS BEING RELEASED TO SUPPORT INTERACTIONS WITH STAKEHOLDERS AND THE ADVISORY COMMITTEE ON REACTOR SAFEGUARDS (ACRS). THIS LANGUAGE HAS NOT BEEN SUBJECT TO COMPLETE NRC MANAGEMENT OR LEGAL REVIEW, AND ITS CONTENTS SHOULD NOT BE INTERPRETED AS OFFICIAL AGENCY POSITIONS. THE NRC STAFF PLANS TO CONTINUE WORKING ON THE CONCEPTS AND DETAILS PROVIDED IN THIS DOCUMENT AND WILL CONTINUE TO PROVIDE OPPORTUNITIES FOR PUBLIC PARTICIPATION AS PART OF THE RULEMAKING ACTIVITIES.

THE STAFF IS PRIMARILY SEEKING INSIGHTS REGARDING THE CONCEPTS IN THIS PRELIMINARY LANGUAGE AND SECONDARILY SEEKING INSIGHTS RELATED TO DETAILS SUCH AS NUMERICAL VALUES FOR VARIOUS CRITERIA.

SUBPART I - Maintaining and Revising Licensing Basis Informati on PRELIMINARY RULE LANGUAGE FOR SECTION 53.1322

§ 53.1322 Evaluating changes to facility as described in final safety analysis reports.

(a) A licensee may make changes in the facility as described i n the UFSAR and make changes in the procedures as described in the UFSAR without obt aining a license amendment pursuant to § 53.1311 only if:

(1) A change to the technical specifications incorporated in t he license is not required and

(2) The change meets all of the following criteria:

(i) Does not result in a change to the frequency or consequenc es of an event sequence such that an event sequence previ ously deemed not risk signific ant becomes risk significant by the analyses performed in accordance with § 53.450(e).

(ii) Does not result in a change to the frequency or consequen ces of an event sequence such that an event sequence deemed risk significant in accordan ce with § 53.450(e) has a decrease of 10 percent or more in the calculated margins to the LBE evaluation criteria required to be established in accordance with § 53.450(e).

(iii) Does not result in a change to the frequency or conseque nces of one or more event sequences such that the margin between the calculated cumulativ e risks posed by the commercial nuclear plant and the safety criteria of § 53.220 de creases by 10 percent or more.

(iv) Does not involve a departure from a method of evaluation described in the UFSAR used in assessing margins in accordance with § 53.450(e) unless the results of the analysis are conservative or essentially the same, the revised method of eva luation has been previously approved by the NRC for the intended application, or the revise d method of evaluation can be used in accordance with an NRC endorsed consensus code or stand ard.

(v) For commercial nuclear plants licensed under this part for which alternative evaluation criteria are applicable in accordance with § 53.470, does not result in a change to the frequency or consequences of event sequences such that the calc ulated margins between the results for event sequences evaluated in accordance with § 53.4 50(e) and the alternative evaluation criteria decreases by 25 percent or more.

(3) In implementing this paragraph, the UFSAR is considered to include FSAR changes since submittal of the last update of the UFSAR pursuant to § 5 3.1320.

(4) The provisions in this section do not apply to changes to the facility or procedures when the applicable regulations establish more specific criteri a for accomplishing such changes.

(b)(1) A licensee who references a design certification rule m ay make departures from the standard design, without prior Commission approval, unless the proposed departure involves a change to the design as described in the rule certif ying the design, in which case the requirements of § 53.1315 are applicable.

(2) The licensee shall maintain records of all departures from the certified design of the facility and these records must be maintained and available for audit until the date of termination of the license. The licensee will identify the location and na ture of departures from licensing basis information within supporting documents for a certified d esign within the updates to the safety analysis report required by § 53.1321.

(3) Licensees for which the NRC has docketed the certifications required under Subpart G of this part are not required to retain records of departures from the design of the facility associated with structures, systems, and components that have b een permanently removed from service using an NRC-approved change process.

(c)(1) The licensee shall maintain records of changes in the f acility and procedures made pursuant to paragraph (a) of this section. These records must include a written evaluation which provides the bases for the determination that the change does not require a license amendment pursuant to paragraph (a)(2) of this section.

(2) The licensee shall submit, as specified in § 53.040 of thi s part, a report containing a brief description of any changes, including a summary of the ev aluation of each. A report must be submitted at intervals not to exceed 24 months. For combine d licenses, the report must be submitted at intervals not to exceed 6 months during the period from the date of application for a combined license to the date the Commission makes its findings under 10 CFR 53.yyy (52.103(g)).

(3) The records of changes in the facility must be maintained until the termination of an operating license or combined license issued under this part, o r the termination of a renewed license issued under [ ], whichever is later. Records of cha nges in procedures must be maintained for a period of 5 years.

(d) [Reserved]

(e) [Reserved]