ML21053A002
| ML21053A002 | |
| Person / Time | |
|---|---|
| Issue date: | 02/26/2021 |
| From: | Istvan Frankl, Raj Iyengar NRC/RES/DE/CIB, NRC/RES/DE/CMB |
| To: | Louise Lund NRC/RES/DE |
| R. Roche-Rivera | |
| Shared Package | |
| ML21050A473 | List: |
| References | |
| RG 1.87 | |
| Download: ML21053A002 (3) | |
Text
February 26, 2021 MEMORANDUM TO:
Louise Lund, Director Division of Engineering Office of Nuclear Regulatory Research FROM:
Istvan Frankl, Chief /RA/
Corrosion & Metallurgy Branch Division of Engineering Office of Nuclear Regulatory Research Raj M. Iyengar, Chief /RA/
Component Integrity Branch Division of Engineering Office of Nuclear Regulatory Research
SUBJECT:
RESULTS OF PERIODIC REVIEW OF REGULATORY GUIDE 1.87 This memorandum documents the US Nuclear Regulatory Commission (NRC) periodic review of regulatory guide (RG) 1.87, Revision 1, Guidance for Construction of Class 1 Components in Elevated-Temperature Reactors. The RG, published in June 1975, approves, with conditions, the initial revisions of five American Society of Mechanical Engineers (ASME) Code Cases (1592-0, 1593-0, 1594-0, 1595-0, and 1596-0). These Code Cases are the precursors to the other iterations of ASMEs high temperature construction rules - Code Cases N-47 through N-51; ASME Section III, Subsection NH; and currently ASME Section III, Division 5.
Documentation of the NRC staff review is enclosed.
The guidance in RG 1.87, Revision 1 is outdated and nonconservative, in part, as evidenced by the development of the 2017 Edition of ASME Section III, Division 5. The nonconservative areas have been revised in ASME Section III, Division 5. The parts of the Code Case that have not been revised are still appropriate for use.
Based on the comparison of RG 1.87, Rev. 1 with the 2017 Edition of ASME Section III, Division 5, the staff recommend that RG 1.87, Rev. 1, be revised to endorse ASME Section III, Division 5 (with conditions, if necessary). The staff plans to issue proposed Revision 2 to RG 1.87 for public comment by June 2021.
Enclosure:
Regulatory Guide Periodic Review: Guidance for Construction of Class 1 Components in Elevated-Temperature Reactors CONTACTS: Amy B. Hull, Ph.D., RES/DE/CMB Shah N. Malik, Ph.D, RES/DE/CIB 301-415-2435 301-415-2436
L. Lund 2
SUBJECT:
RESULTS OF PERIODIC REVIEW OF REGULATORY GUIDE 1.87 DISTRIBUTION:
M. Rahimi, RES I. Frankl, RES A. Hull, RES R. Roche-Rivera, RES R. Iyengar, RES S. Malik, RES J. Poehler, RES M. Hayes, NRR J. Hoellman, NRR ADAMS Accession No.: Pkg ML ML21050A473 OFFICE RES/CMB RES/CIB SUNSI Review BC:RES/DE BC:RES/CIB BC:RES/RGGIB NAME A. Hull S. Malik R. Roche-Rivera I. Frankl R. Iyengar M. Rahimi DATE 02/22/2021 02/22/2021 02/22/2021 02/23/2021 02/26/2021 02/26/2021 OFFICE RECORD COPY
ML21050A473; Memo ML21053A002 OFFICE RES/DE/CMB RES/DE/CIB RES/DE/CIB RES/DE/CMB NAME AHull SMalik RRoche-Rivera IFrankl DATE Feb 22, 2021 Feb 22, 2021 Feb 22, 2021 Feb 23, 2021 OFFICE RES/DE/CIB NAME RIyengar DATE Feb 26, 2021