Evaluation of PWR tubesheet crevice-flushing approaches: Final report

Technical Report · Sat Nov 01 00:00:00 EST 1986

OSTI ID:7228688

Sawochka, S G; McNea, D A; Clouse, M E; Kassen, W R

Processes for removing impurities from tube-to-tubesheet crevices of PWR steam generators were evaluated employing a rectangular flat plate simulant of the crevice region. Either sodium chloride or sodium hydroxide solutions were used to prepare the crevice fill media with magnetite powder used to simulate the crevice corrosion product. The effectiveness of the tested impurity removal processes is discussed in light of the physical/chemical basis of each process. Heatup/cooldown cycling and low temperature depressurization both appear to offer promise relative to improving the efficiency of normally employed crevice flushing efforts at commercial units.

• Research Organization: NWT Corp., San Jose, CA (USA)
• OSTI ID: 7228688
• Report Number(s): EPRI-NP-4898; ON: TI87920140
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
PWR TYPE REACTORS
REACTOR MAINTENANCE
STEAM GENERATORS
TUBES
CREVICE CORROSION
CORROSION PROTECTION
EVALUATION
STAINLESS STEELS
WATER CHEMISTRY
ALLOYS
BOILERS
CHEMICAL REACTIONS
CHEMISTRY
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MAINTENANCE
REACTORS
STEELS
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
360105 - Metals & Alloys- Corrosion & Erosion