Document: NUREG-0800
Document ID: ae3a3dbc-a317-4493-a09c-c4fb244194bd
Document Type: srp
Title: Revision 3 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0708/ML070850019.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5
CFR Part: 
CFR Title: 

Content:
ally in crevices. BTP 5-1-2 Revision 3 - March 2007 Less than thoroughly effective water treatment, operational procedures, and design factors have led to the degradation of steam generator tubing, as documented by an extensive history of stress-corrosion cracking, wastage, and denting of steam generator tubing in operating PWRs. Therefore, the staff recommends the criteria below. Industry water chemistry guidelines (e.g., the Electric Power Research Institute (EPRI) Secondary Water Chemistry Guidelines) continue to evolve to include more recent research and operating experience. Although the staff does not review or evaluate these guidelines, there is an expectation that plant water chemistry programs will be periodically reviewed and updated to reflect more recent information and trends in water chemistry management. B. BRANCH TECHNICAL POSITION 1. The applicant’s final safety analysis report (FSAR) should describe the implementation of a secondary water chemistry monitoring and control program in accordance with the supplier’s recommended procedure to inhibit steam generator corrosion and tube degradation. The applicant should address how its program meets industry guidelines (e.g., EPRI’s secondary water chemistry guidelines and Nuclear Energy Institute (NEI) 97-06). In addition, this program should cover all operational modes. Each of the modes should be defined with regard to percent rated thermal power and approximate temperature range. 2. The secondary water chemistry monitoring and control program should identify a sampling schedule for critical parameters during each mode of operation, as well as the acceptance control criteria for these parameters. At a minimum, the program should control pH, cation conductivity, sodium, and dissolved oxygen. However, other parameters merit consideration, such as specific conductivity, chloride, fluoride, suspended solids, silica, total iron, copper, sulfate, lead, ammonia, and residual hydrazine. Additives to each