ML20337A396
| ML20337A396 | |
| Person / Time | |
|---|---|
| Issue date: | 01/06/2021 |
| From: | Victoria Huckabay NRC/NMSS/DREFS/RRPB |
| To: | |
| Victoria Huckabay | |
| References | |
| 10 CFR Part 50, ASME 2019-2020, NRC-2018-0290, RIN 3150-AK22 | |
| Download: ML20337A396 (1) | |
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NOTE: The NRC is making this preliminary proposed rule language available to the public solely for the purpose of providing information to the public and to provide preparatory material for upcoming public meetings. The release of the preliminary proposed rule language will facilitate discussions at upcoming public meetings. This language does not represent a final NRC staff position, nor has it been reviewed by the Commission. Therefore, the preliminary proposed rule language may undergo significant revision during the rulemaking process. The NRC is not requesting public comments on this preliminary proposed rule language, and no stakeholder requests for a comment period will be granted at this stage in the rulemaking process. Following Commission direction to proceed with the proposed rule, the NRC will seek public comment on the proposed rule in the Federal Register.
NOTE: This preliminary proposed rule language does not include any necessary conforming changes 1
United States Nuclear Regulatory Commission Preliminary Proposed Rule Language Section 55a of Part 50 of Title 10 of the Code of Federal Regulations (10 CFR)
[NRC-2018-0290]
The NRC is proposing to amend the regulations in 10 CFR 50.55a, Codes and standards.
One of the changes under consideration is a new paragraph at 10 CFR 50.55a(g)(4)(vi), as shown below:
(iv) Applicable ISI Code: Operational leakage.
(A) Operational Leakage is leakage through a flaw in the pressure retaining boundary discovered outside any ASME BPV Code required pressure test. The term, through-wall, is an adjective used to describe a condition that extends from one surface to another surface in a component. For the purposes of paragraph (B) below, a component is defined as a vessel, pump, valve, storage tank, or piping system.
(B) If through-wall Operational Leakage is observed from an ASME BPV Code Class 1, 2 or 3 component and the structural integrity of the component must be established, then the methods described in the provisions of the applicable inservice inspection requirements, as specified in paragraph (g) of this section, must be used. These methods require implementation of an NRC approved Code Case or Nonmandatory Appendix U of ASME BPV Code,Section XI, to verify structural integrity or perform a repair/replacement activity.