Treatment of a heater tube intended for a pressurizer of the primary cooling system of a nuclear reactor
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United States of America Patent
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Oct 27, 2015
Grant Date -
Feb 21, 2013
app pub date -
Apr 6, 2011
filing date -
Apr 8, 2010
priority date (Note) -
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Abstract
A treatment of a heater tube intended to be used in a pressurizer of the primary cooling system of a nuclear reactor. In particular, the heater tube comprises a heater housed in a substantially cylindrical sheath. The material of which this sheath is made is a work-hardened austenitic stainless steel. In particular, the external surface of the sheath is liable to undergo a stress corrosion during use of the heatertube. The method includes a heat treatment step, preferably using induction heating, in which the external surface of the sheath is heat-treated so as to recrystallize the material of the sheath at least on the surface thereof.
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