IGA resistance of TT Alloy 690 and concentration behavior of Broached Egg Crate tube support configuration

Conference · Wed Dec 30 23:00:00 EST 1992

OSTI ID:48122

Suzuki, S ^[1]; Kusakabe, T; Yamamoto, H; Arioka, K; Ochi, T ^[2]

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1. Kansai Electric Power Co., Inc. (Japan)
2. Mitsubishi Heavy Industries, Ltd. (Japan)

In order to improve the reliability of the Steam Generator (SG), TT Alloy 690 and BEC (Broached Egg Crate) type tube support plate has been developed. Some tests are carried out to heighten the reliability for these improvements all the more and the following results are obtained. (1) SERT test (Slow Extension Rate Test) made clear that TT690 has less IGA susceptibility in comparison with MA600. (2) The alkaline susceptibility on the occurrence of IGA/SCC on TT690 and MA600 obtained by SERT corresponds to that obtained by Model Boiler test. (3) By model boiler test, superior concentration behaviors for BEC type tube support plate configuration have been recognized in comparison with Drill type. This result is obtained by the joint research of the five utilities (Kansai Epco, Hokkaido Epco, Shikoku Epco, Kyushu Epco, JAPCO) and MHI.

• OSTI ID: 48122
• Report Number(s): CONF-910808--
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
INCONEL 690
INTERGRANULAR CORROSION
PWR TYPE REACTORS
STEAM GENERATORS
STRESS CORROSION
TENSILE PROPERTIES
TESTING
TUBES