Improving the reliability of open-cycle water systems: Application of biofouling surveillance and control techniques to sediment and corrosion fouling at nuclear power plants

Technical Report · Sun Mar 01 00:00:00 EST 1987

OSTI ID:6440484

Johnson, K I; Neitzel, D A

Biofouling surveillance and control techniques are evaluated for their applicability to sediment and corrosion fouling and suggestions are given to improve their effectiveness. Alternate techniques to better detect and control sedimentation and corrosion are also evaluated. Environmental conditions that allow biofouling, sedimentation, and corrosion to occur are summarized. A correlation between sediment and corrosion is identified and the causes are described. Environmental regulations, especially those in the Clean Water Act of 1977, are reviewed to identify those that may limit or prevent the use of surveillance and control techniques described in this report. Flow velocity is the major design factor that determines whether or not biofouling, sedimentation, and corrosion will occur. Monitoring flow conditions can provide early warning of conditions that will allow fouling to occur. Visual inspection is the most common and most effective technique for identifying the cause and extent of fouling in the open-cycle water system. Most biofouling control techniques in current use are not effective against sediment and corrosion. Frequent, high-velocity flushing of cooling loops may effectively remove sediment and reduce under-sediment corrosion. Alternate biocide treatments such as targeted chlorination or the use of ozone or 2,2-dibromo-3-nitrilo propionamide (DBNPA) may also be effective in reducing under-sediment corrosion.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA); Nuclear Regulatory Commission, Washington, DC (USA). Div. of Safety Review and Oversight
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6440484
• Report Number(s): NUREG/CR-4626-Vol.2; PNL-5876-Vol.2; ON: TI87006795; TRN: 87-028152
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
NUCLEAR POWER PLANTS
BIOLOGICAL FOULING
OPEN-CYCLE COOLING SYSTEMS
FOULING
RELIABILITY
ANTIFOULANTS
CHLORINATION
CLEAN WATER ACT
CORROSION
POLLUTION REGULATIONS
SEDIMENTATION
WATER POLLUTION ABATEMENT
CHEMICAL REACTIONS
COOLING SYSTEMS
ENERGY SYSTEMS
HALOGENATION
LAWS
NUCLEAR FACILITIES
POLLUTION ABATEMENT
POLLUTION LAWS
POWER PLANTS
REGULATIONS
THERMAL POWER PLANTS
220400* - Nuclear Reactor Technology- Control Systems