Document: NRC Regulatory Guide
Document ID: e7cef6d0-2869-4d77-9a08-126120ae6043
Document Type: regulatory_guide
Title: Fuel Oil Systems for Emergency Power Supplies + HISTORY – HISTORY 06/2012 – DG-1282 , Proposed Revision 2 Prior to the issuance of DG-1282, RG 1.137 was entitled "Fuel –Oil Systems for Standby Diesel Generators (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1210/ML121090447.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.137
CFR Part: 
CFR Title: 

Content:
on 6.2.5, “Other Requirements,” of ANSI/ANS-59.51-1997 states, in part, that “…protection shall be provided as required against external and internal corrosion, such as by coatings or cathodic protection, or both, in accordance with NACE Standard RP0169-1983, ‘Recommended Practice - Control of External Corrosion on Underground or Submerged Metallic Piping Systems’.” (Ref. 12) The NRC does not endorse this NACE standard however applicants and licensees may find it useful. If corrosion protection is required, coatings and cathodic protection should be provided as follows: 9.1. The internal coatings applied to the safety-related components of the fuel oil system should be safety-related coatings and the selection, application, qualification, inspection, and maintenance of the coatings should be in accordance with RG 1.54, Rev. 2, “Service Level I, II, and III Protective Coatings Applied to Nuclear Power Plants” (Ref. 13), and DG-1282, Page 6 ASTM D5144-08e, “Use of Protective Coating Standards in Nuclear Power Plants” (Ref. 14). Protective coatings for the safety-related components of the fuel oil system should be classified as Coating Service Level III per RG 1.54, Rev. 2. Tank interior coatings should not detach or dissolve and thereby impair the adequate and uninterrupted supply of fuel oil to the diesel generators. Coatings should prevent tank corrosion products from contaminating and fouling filters, which could starve the diesel generator of the necessary fuel. Any qualification of coatings should be done for the expected range of fuel sulfur content. 9.2. Although not specifically endorsed by the NRC, a more recent version of the NACE Standard, i.e., NACE SP0169-2007, “Control of External Corrosion on Underground or Submerged Metallic Piping Systems” (Ref. 15), contains more specific information concerning both external coatings and cathodic protection. This information may be useful to applicants and licensees. Section 5 of SP0169-2007