ERDL-NPFO--CORROSION TESTING OF INCONEL AND CROLOY 16-1 HEAT EXCHANGERS

Technical Report · Tue Mar 01 04:00:00 EST 1960

OSTI ID:4180721

Two sets of model heat exchangers and five miniature heat exchangers were tested in dynamic and static pressurized water loops, respectively. The model heat exchangers were MOD SG-5 and MOD SH-5 with Croloy 16-1 tubes and MOD SG-6 and MOD SH-6 with Inconel tubes. The miniature heat exchangers MIn 4, MIN 5, and MIN 6 had Croloy 16-1 tubes; MIN 8 and MIN 9 had Inconel tubes. Miniature beat exchangers MIN 4, 5, and 6 were tested for MIN 4 and 5 was discontinued after leaks occurred in each; MW 6 did not leak. Miniature heat exchangers MIN 8 and 9, both fabricated completely of Inconel, were service tested 5296 and 2631 hours, respectively. Model heat exchangers MOD SG-5 (steam generator) and SH-5 (superheater) with Croloy 16-1 tubes were service tested 4253 hours. Model heat exchangers MOD SG-6 and SH-6, a stesm generator and superheater with Inconel tubes, were service tested 3819 hours. The performance of the Croloy 16-1 heat exchangers, although superior to other materials tested in the past, fell far short of tbe performance shown by the Inconel test vessels. The Croloy 16-1 tubes pitted in all of the vessels; pitting was particularly bad in the superheater. Measurements were made which gave some qualitative indication of the heat transfer characteristics of the model steam generators. It was found that these characteristics were different for the exchanger containing Inconel tubes (MOD SG-6) as compared to those of the unit containing Croloy 16-1 tubes (MOD SG-5). (auth)

• Research Organization: Martin Co. Nuclear Div., Baltimore
• NSA Number: NSA-14-016964
• OSTI ID: 4180721
• Report Number(s): MND-E-2326
• Country of Publication: United States
• Language: English

Related Subjects

CHROMIUM ALLOYS
GENERATORS
HEAT EXCHANGERS
HEAT TRANSFER
LEAKS
MATERIALS TESTING
METALS, CERAMICS, AND OTHER MATERIALS
NICKEL ALLOYS
PIPES
PRESSURE
STEAM
VESSELS
WATER