Background
The project was to supply South Ukraine NNP Unit 3 with an appropriate and reliable on-line monitoring system for the most significant chemical parameters of the secondary circuit as well as equipment for chemical laboratories. In order to fit the minimal chemistry requirements imposed on the secondary water, specific equipments were required in the South Ukraine NPP Unit 3 as well as in laboratories. One part of the equipment was dedicated to on-line measurements (sublot 01.01, 01.02, 02.01 and 02.02) and the other monitors or systems were meant to be off-line (lot 03, lot 04 and lot 05).
Objectives
This action was to increase the diagnostic capability in case of deviations in the plant‘s water chemistry conditions.
The project was divided into different lots:
Sublot 01.01 : Two Na+ monitors for the condenser hotwell water that enable to quantify and locate the condenser circulation water in leakage rate (four decades minimum for measurement range)
Sublot 01.02: Four Na+ monitors for the Steam Generator Blowdown (SGBD) and the Steam Generator Blowdown Processing System (SGBDPS).
Sublot 02.01: One O2 monitor for extraction water to verify that the hydrazine treatment (N2H4) is efficient enough to keep O2 concentration in the operation limits.
Sublot 02.02: Two O2 monitors to control on-line the completion of O2 scavenging.
Lot 03: Three Cl- analyzers for off-line laboratory purposes (One analyzer per NPP Unit).
Lot 04: Capillary Electrophoresis system and auxiliary standard equipment to perform analyses on the liquid streams of the plant (this lot was not contracted).
Lot 05: Water purification system meant to produce ultra pure water for chemical blank solutions.
The monitoring equipment on-line (sublot 01.01, 01.02, 02.01 and 02.02) shall be implemented in South Ukraine NPP Unit 3 and off-line (lot 03, lot 04 and lot 05) systems will take place in laboratories.
Functional test and appropriate on-site training and two years maintenance were part of the contract.
Project Results
The project was contracted in September 2001.
The supply was made available in May 2003. Provisional acceptance was signed in December 2003.
The Capillary Electrophoresis system was not contracted due to an unsuccessful tender.
End of Warranty period has been achieved without any specific problem. Project is completed.
The integrity of the steam generators will be preserved by a better chemistry control of the most significant chemical parameters of the secondary water. The diagnostic capability in case of deviations in water chemistry conditions is enhanced.