Document: NRC Regulatory Guide
Document ID: 4a45938b-46f4-4b26-9191-2914fcf357f1
Document Type: regulatory_guide
Title: Inservice Inspection of Pressurized Water Reactor Steam Generator Tubes (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740256.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.83
CFR Part: 
CFR Title: 

Content:
le to the NRC staff of Implementing specific pans @1 the Service Section. Commission's regulations, to delineate techniques used by the staff in evalu- The guides are issued in the following ten broad divisions: ating specific problems or postulated accidents, or to provide guidance to appli cents. Regulatory Guides are not substitutes for regulations. and compliance 1. Power Reactors ". Products with them is not required. Methods and solutions different from those set out in 2. Research end Test Reactors 7. Transportation the guides will be accepteble if they provides basis for the findings requisite to 3. Fuels and Materials Facilities S. Occupational Health the issuance or continuance of a permit or license by the Commission. 4. Environmental and Siting 9. Antitrust Review Comments end suggestions for improvements in these guides are encouraged S Materials and Plant Protection 10 General ot all times, and guides will be revised, as appropriate. to accommodate cam ments and to reflect new information or esperience. This guide was revised as a Copies of published guides may be obtained by written request indicating the result of substantive comments received from the public and additional staff divisions desired to the U.S. Nuclear Regulatory Commission. Washington. D.C. review. 2055. Attention: Director. Oflice of Standards Development. of steam generator tube degradation and failure. There is evidence that excessive steam-side corrosion attack occurs in restricted flow areas that permit high local concentration of free caustic, phosphates, and Impurities that may enter the steam generator tnruugh'concenser inleakage. Therefore, secondary water chemistry specifi cations must reflect the limitation of the materials in the secondary system, and the supporting auxiliary chemical feed system must be designed to maintain desired feedwater quality to each steam generator. Effective monitoring of water chemistry with in-line continuous analytical instrumentation