SEDL / STP / STP1325-EB / STP13882S



Role and Experience with Thermal Monitors in Reactor Vessel Surveillance Capsules

Lowe, AL
Lowe Associates, Lynchburg, VA


Pages: 15    Published: Jan 1999


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Abstract

The surveillance capsule irradiation temperature is important to assure that the data obtained are representative of the reactor vessel beltline materials. Capsules evaluated showed that the temperatures exceed 588°F(309°C) during in-reactor exposure. The monitors melt as the result of normal system operating temperature transients up to 588°F(309°C). The apparent melting of thermal monitors at temperatures greater than 588°F(309°C) is the result of long term exposure to temperatures close to the material melting temperature, causing slumping and the appearance of melting.


Keywords:
surveillance capsules, thermal monitors, operating temperatures, low-melting alloys, long-term creep

Paper ID: STP13882S
Committee/Subcommittee: E10.07
DOI: 10.1520/STP13882S
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