Foreword
This standard replaces EJ/T 345-1988 Technical specifications of water chemistry for pressurized water reactor nuclear power plant During the preparation of this standard, the relevant technology and experience of water chemistry for pressurized water reactor nuclear power plants at home and abroad are fully applied, feedbacks of operating experience of domestic pressurized water reactor nuclear power plants are also reflected.
The following main changes have been made with respect to EJ/T 345-1988:
a) The normative references are added;
b) The terms and definitions are added;
c) The analytical method requirements of water chemical parameters are added;
d) The relevant contents of the water chemistry of the primary circuit system are modified, the concentration of chloride and fluoride ions in the reactor coolant system is modified from ≤0.15ppm to ≤0.10mg/kg; and the relevant contents of 12% boric acid concentration in Table 6 are canceled;
e) The relevant contents of the water chemistry of the secondary coolant circuit system are modified, the dissolved oxygen concentration of supplied water during power operation is modified from [O2]+0.005ppm to >0.02mg/kg, etc.;
f) The contents of chemical reagent technical conditions and ion exchange resin technical conditions in the original standard are canceled;
g) The contents of usage guidelines of several chemical materials in the original standard are canceled;
h) The contents of Annex A in the original standard for protective coatings used for containment structures and system equipment inside containment are canceled.
This standard was proposed by China National Nuclear Corporation.
This standard is under the jurisdiction of the Institute for Standardization of Nuclear Industry.
Drafting organization of this standard: Shanghai Nuclear Engineering Research & Design Institute.
Chief drafters of this standard: Shi Xiuqiang and Xu Xuelian.
This standard was issued in July 1988 for the first time.
The control of water chemistry for pressurized water reactor nuclear power plant
1 Scope
This standard specifies the main water chemical parameters of the primary circuit system and the secondary coolant circuit system for pressurized water reactor nuclear power plant.
This standard is applicable to the control of water chemistry of the primary circuit system and the secondary coolant circuit system for pressurized water reactor nuclear power plant.
2 Normative references
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document applies.
GB/T 4960.2-1996 Glossary of terms: nuclear science and technology - Fission reactor
GB/T 9721 Chemical reagent - General rules for the molecular absorption spectrophotometry (ultraviolet and visible)
GB/T 9722 Chemical reagent - General rules for the gas chromatography
GB/T 9723 Chemical reagent - General rule for flame atomic absorption spectrometric analysis
GB/T 9724 Chemical reagent - General rule for the determination of pH
GB/T 10724 Chemical reagent - General rules for the flameless (graphite furnace) atomic absorption spectrometry
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 4960.2-1996 apply.
4 Analytical method requirements of water chemical parameters
The analytical method requirements of water chemical parameters shall meet those specified in GB/T 9721, GB/T 9722, GB/T 9723, GB/T 9724 and GB/T 10724.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Analytical method requirements of water chemical parameters
5 Water chemistry of primary circuit system
6 Water chemistry of secondary coolant circuit system
7 Requirements for water for hydrostatic test of nuclear power plant equipment
