SYMPOSIA PAPER Published: 01 January 1999
STP13882S

Role and Experience with Thermal Monitors in Reactor Vessel Surveillance Capsules

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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.

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Lowe, AL
, Lynchburg, VA, USA
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Developed by Committee: E10
Pages: 485–499
DOI: 10.1520/STP13882S
ISBN-EB: 978-0-8031-5395-0
ISBN-13: 978-0-8031-2614-5