Document: NUREG-0800
Document ID: 48fcca4d-4efe-4600-b4ca-9911efb87843
Document Type: srp
Title: and 5.2.1.2.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070446.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.1.1
CFR Part: 
CFR Title: 

Content:
impurities (particularly chloride, ammonia and silica) in the steam generator water should be measured at least three times per week. e. For plants utilizing phosphate treatment: (1) The composition, quantity, and addition rate of each additive should be recorded initially and thereafter whenever a change is made. (2) The Na/P0 molar ratio of the secondary coolant should be recorded 4 initially and whenever a change is made. Na/P0 ratio must be rigidly 4 controlled. (Na/P0 ratio is to be held 2.3 2.6). 4 (3) The electrical conductivity and pH of the bulk steam generator water and feedwater should be measured continuously. Assurance should be provided that the sample taken at the blowdown is typical of the bulk steam generator water and that there is a minimum bypass between the feedwater inlet and the blowdown sampling point. (4) The concentration of suspended/dissolved solids and impurities (particularly free caustic, chloride, and silica) in the steam generator water should be measured daily. (5) The concentration of dissolved solids (particularly sodium and phosphate) in the blowdown liquid should be measured once each week. (6) The rate of blowdown should be recorded initially and whenever a change in rate is made. (7) The hideout and reverse hideout of phosphate should be recorded. The phosphate concentration in each steam generator (or in one steam generator if this is shown to be representative of all) and in the blowdown liquid should be measured before and after each planned power level change of 10% or greater, and should be measured after each unplanned power level change of 20% or greater. 5.4.2.1-17 DRAFT Rev. 3 - April 1996 f. For All PWR Plants (1) Condenser cooling water in-leakage to the condensate has been identified as the major source of impurity ingress in the PWR secondary feedwater. The combination of impurity ingress with corrosion of copper containing alloys and corrosion product transport (Fe 0 , Ni0 , etc.) in the secondary 3 4 2 water