Daily Rules, Proposed Rules, and Notices of the Federal Government
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The NRC is issuing a revision to an existing guide in the NRC's “Regulatory Guide” series. This series was developed to describe and make available to the public information such as methods that are acceptable to the NRC staff for implementing specific parts of the agency's regulations, techniques that the staff uses in evaluating specific problems or postulated accidents, and data that the staff needs in its review of applications for permits and licenses.
Revision 2 of RG 1.90 was issued with a temporary identification as Draft Regulatory Guide, DG-1197. The recommendations described in this guide constitute an approach that the NRC staff finds acceptable for satisfying the requirements of General Design Criterion (GDC) 53, “Provisions for Containment Testing and Inspection,” of Appendix A, “General Design Criteria for Nuclear Power Plants,” part 50 of Title 10 of the
The previous Revision 1 of this RG was published in 1977. Since this publication, the industry and the NRC have been involved in research and testing to determine and evaluate the effectiveness of containment inservice inspection (ISI) programs, particularly the reliability of installed instrumentation and the use of periodic pressure tests. In addition, the NRC has reviewed containment tendon ISI programs as part of license applications. Revision 2 of RG 1.90 is a result of these efforts. It provides an ISI program that is based on a real-time, multiple-strategy approach (i.e., appropriate grout design and installation, installed instrumentation, periodic pressure tests, and visual examination).
DG-1197 was published in the
Issuance of this final regulatory guide does not constitute backfitting as defined in 10 CFR 50.109 (the Backfit Rule) and is not otherwise inconsistent with the issue finality provisions in 10 CFR part 52. As discussed in the “Implementation” section of this regulatory guide, the NRC has no current intention to impose this regulatory guide on holders of current operating licenses or combined licenses.
This regulatory guide may be applied to applications for operating licenses and combined licenses docketed by the NRC as of the date of issuance of the final regulatory guide, as well as future applications for operating licenses and combined licenses submitted after the issuance of the regulatory guide. Such action does not constitute backfitting as defined in 10 CRF 50.109(a)(1) or is otherwise inconsistent with the applicable issue finality provision in 10 CFR Part 52, inasmuch as such
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