Document: NRC Regulatory Guide
Document ID: a81802d8-8b24-447a-bb5a-fe24b27963a8
Document Type: regulatory_guide
Title: Quality Assurance Requirements for Cleaning of Fluid Systems and Associated Components of Water-Cooled Nuclear Power Plants
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0702/ML070250571.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.37
CFR Part: 
CFR Title: 

Content:
ndorsing the applicable sections of ASME NQA-1-1994, Part II, Subpart 2.1. The other regulatory positions from the original version of RG 1.37 are no longer needed because they have been subsumed into ASME NQA-1-1994, Part II, Subpart 2.1. However, Regulatory Position 3 is new and states that licensees should follow the precautions in ASME NQA-1-1994, Part III, Subpart 3.2, Nonmandatory Appendix 2.1, “Guidance on Cleaning of Fluid Systems and Associated Components for Nuclear Power Plants.” In addition, the new Regulatory Position 3 includes a recommendation to use a suitable chloride stress-corrosion cracking inhibitor when using fresh water to flush systems containing austenitic stainless steel components. Rev. 1 of RG 1.37, Page 4 C. REGULATORY POSITION The NRC staff finds that the provisions and recommendations included in ASME NQA-1-1994, Part II, Subpart 2.1 are generally acceptable for onsite cleaning of materials and components, cleanness control, and preoperational cleaning and layup of water-cooled nuclear power plant fluid systems. These provisions and recommendations provide an adequate basis for complying with the pertinent QA requirements of Appendix B to 10 CFR Part 50, subject to the following regulatory positions: 1. Referenced Documents Section 7 of the Introduction to ASME NQA-1-1994, Part II, which is applicable to Subpart 2.1, states that the codes, standards, and specifications referenced in this Part may be identified with the applicable date or citation at the point of reference or in Table entitled “Codes, Standards, and Specifications Referenced in Text.” The specific applicability or acceptability of these listed documents has been (or will be) covered separately in other regulatory guides or in Commission regulations, as appropriate. 2. Water Quality Section 3.4.1 of ASME NQA-1-1994, Part II, Subpart 2.1 states that “the water quality for mixing cleaning solutions, rinsing, and flushing shall be specified by the organization