Stator Water Caustic Dosing System
|Scope of Supply:||DESIGN ¦ BUILD ¦ DELIVERY|
|Client:||EDF Energy – Heysham 2|
|Key Deliverables:||Design & supply caustic dosing systems for units 7 & 8|
Due to chemical control issues with TG7 and 8 stator winding cooling water systems, there became a requirement to improve the pH control within the circuit. The best approach would be through the deployment of a caustic dosing system. pH control is essential in stator water systems to minimize corrosion rates during operation but most importantly when dissolved oxygen transients are experienced. The mandatory requirement for pH control between pH 8 and 9 is now incorporated into relevant client internal documentation.
AMS had previously delivered a caustic dosing system to Hinkley Point B’s Chemistry Department. The positive feedback from Hinkley Point B was relayed to Heysham 2 directly from EDF.
The particulate and sulphur 35 (S-35) gaseous discharge monitoring panels at Hinkley Point B required upgrades.
EDF Energy – Hinkley Point B
This project involved the design of a modification to valve B/G/90 to provide automatic operation of the valve to overcome the potential local hazards which could prevent isolation of the system if a seismic event were to occur.