Chemical impurity monitoring in the turbine environment at ANO-1. Final report

Technical Report · Sat May 01 04:00:00 EDT 1982

OSTI ID:5337412

Bour, D P

An overview is presented here of three independent measurement campaigns for trace impurities in the secondary side water/steam of ANO-1, a PWR containing a once-through steam generator. The measurements took place in 1978-1979 between two turbine disc cracking incidents near the point of first condensation in the low pressure turbines. Turbine disc cracking occurred despite maintenance of conditions near the turbine manufacturers recommended limits. Measurements focused on sodium, chloride, and sulfate. The primary source of contamination was found to be the condensate polishing plant. Major improvements were seen to result from changes in regeneration procedures. Turbine damage may be the result of acid conditions at the Wilson Line since chloride and sulfate were enriched relative to sodium in the LP turbine inlet steam.

• Research Organization: NUS Corp., Pittsburgh, PA (USA). Cyrus William Rice Div.
• OSTI ID: 5337412
• Report Number(s): EPRI-NP-2397; ON: DE82904981
• Country of Publication: United States
• Language: English

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21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
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Light-Water Moderated
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ARKANSAS-1 REACTOR
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CHEMISTRY
CRACKS
ENRICHED URANIUM REACTORS
IMPURITIES
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