WJP execution method for reactor vessel lid and jigs
AssigneeMitsubishi Heavy Industries, Ltd.
InventorHideshi Sakashita
Life of this patent
Estimating the term…
Abstract
In a WJP execution method for a reactor vessel lid, WJP is executed on the inner surface of the reactor vessel lid in a state in which an underwater environment is formed on the inner surface of the reactor vessel lid and an aerial environment is formed on the outer surface thereof. In addition, the reactor vessel lid with a waterproof jig attached thereto is arranged in water, the waterproof jig having a cylindrical shape extending to the side of the outer surface of the reactor vessel lid and constituting a vessel with the reactor vessel lid as the bottom portion thereof. Moreover, the reactor vessel lid is arranged on a base installed in the water.
Claims11
A water jet peening (WJP) execution method for a reactor vessel lid, comprising:
- forming an underwater environment on an inner surface of the reactor vessel lid and an atmospheric environment on an outer surface of the reactor vessel lid;
- executing WJP on the inner surface of the reactor vessel lid.
A jig comprising:
- a reactor vessel lid disposed at a bottom;
- and
- a barrel that is attached on a periphery of the reactor vessel lid and has a cylindrical shape to surround a side of an outer surface of the reactor vessel lid.
Dependencies are inferred from the claim text.