Methods for Removal of Secondary Side Deposits
Proactive
Restorative
Solution Advanced Scale Conditioning Agent (ASCA)
Objective
Structurally modify scale to temperature improvements and removal of bulk deposits by dissolution
Benefit
Realize steam pressure increases up to 24 psi
Solution Inhibited Advanced Scale Conditioning Agent (iASCA)
Objective
Maximum bulk deposit removal without high chemical concentrations
Benefit
Deposit removal up to 2600 lbs./SG and addresses chemical hideout for stress corrosion cracking
Solution Consolidated Deposit Extraction (CODE)
Objective
Dissolution of deposit binding species
Benefit
Breaks down 50-90% skeletal binding species for ease of deposit removal by chemical or mechanical methods to allow for reduced tube denting and improved heat transfer
Solution EPRI/Steam Generator Owners Group (SGOG) Process
Objective
Concentrated chemical with high temperatures to restore the SG to like new condition
Benefit
Proven process to remove excessive deposit loading and relieve the conditions that create stress corrosion cracking
