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Electronic Resource
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Publication
DOE SF 10499 T65; Report; August 1984.
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Library's review
ABSTRACT:
Procedure objectives include:
- Velocity flush the lines at maximum allowable velocities to remove loose material.
Manually clean condenser hotwell, deaerator, inline demineralizers, TSS Flash Tank, where debris may be trapped.
- Alkaline flush the system with a solution of 10% Vertan 643
- Rust removal flush the system with the above solution with a pH of 5.0 adjusted with formic acid and inhibited with A-196 inhibitor at a temperature of 140° to 160°F to remove mill scale and iron oxide. Follow with a citric acid rinse and a neutralization and passivation solution of pH 9.5 to 10 and 200 ppm hydrazine and circulated at a temperature of 180° to 200°F.
- Steam blow the steam lines with saturated steam from the rental boiler at a sufficient velocity to produce a cleaning ratio greater than one.
- Lay up system with inhibited water or GN2 as appropriate.
Procedure objectives include:
- Velocity flush the lines at maximum allowable velocities to remove loose material.
Manually clean condenser hotwell, deaerator, inline demineralizers, TSS Flash Tank, where debris may be trapped.
- Alkaline flush the system with a solution of 10% Vertan 643
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and 1% trisodium phosphate at 160° to 180°F to remove grease, paint, and loose corrosion products. Follow with demineralized water flush.- Rust removal flush the system with the above solution with a pH of 5.0 adjusted with formic acid and inhibited with A-196 inhibitor at a temperature of 140° to 160°F to remove mill scale and iron oxide. Follow with a citric acid rinse and a neutralization and passivation solution of pH 9.5 to 10 and 200 ppm hydrazine and circulated at a temperature of 180° to 200°F.
- Steam blow the steam lines with saturated steam from the rental boiler at a sufficient velocity to produce a cleaning ratio greater than one.
- Lay up system with inhibited water or GN2 as appropriate.
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