Vibration measuring apparatus for nuclear reactor internal structure and vibration measurement method therefor
AssigneeKabushiki Kaisha Toshiba
InventorsKatsuhiko Sato, Hidehiko Kuroda, Mitsuhiro Enomoto, Hidefumi Amanai, Tooru Ootsubo
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Abstract
A vibration measuring apparatus for nuclear reactor internal structure includes a holder which has an opening contact on a surface of a pressure vessel of a nuclear reactor; a vibrator accommodated in the holder so as to transmit or receive an ultrasonic wave; a couplant with which the holder is filled up; and, a bias component applies a biasing force to the vibrator in the direction of the opening; The couplant is a solid state of metal material at normal temperature and change to liquid stage by heat transfer from the pressure vessel.
Claims6
A vibration measuring apparatus comprising:
- a holder comprising an interior space and an opening, the holder being formed with a slot to at least a portion of a circumferential edge of the opening and retaining a bonding agent for bonding the holder on the surface of the pressure vessel, the opening being configured to closely contact with a surface of a pressure vessel of a nuclear reactor without a gap therebetween;
- a vibrator configured to be provided in the interior space of the holder, the vibrator comprising an end side and a transmitting/receiving side opposite to the end side, wherein the transmitting/receiving side of the vibrator is configured to transmit or receive an ultrasonic wave;
- a bias component configured to be provided in the interior space between the holder and the end side of the vibrator, the bias component being configured to apply a biasing force to the vibrator in a direction of to the transmittinq/receiving side from the end side;
- and a metal couplant configured to be filled in the interior space of the holder between the transmitting/receiving of the vibrator and the opening of holder, wherein the metal couplant at a first temperature is configured to be filled in the interior space in a solid state and at a second temperature greater than the first temperature is configured to be in a liquid state when heated to the second temperature by heat transferred to the metal couplant via the opening.
A vibration measuring apparatus comprising:
- a holder comprising an interior space and an opening the opening being configured to closely contact with a surface of a pressure vessel of a nuclear reactor;
- a vibrator configured to be provided in the interior space of the holder, the vibrator comprising an end side and a transmitting/receiving side opposite to the end side, wherein the transmitting/receiving side of the vibrator is configured to transmit or receive an ultrasonic wave;
- a bias component configured to be provided in the interior space between the holder and the end side of the vibrator, the bias component being configured to apply a biasing force to the vibrator in a direction to the transmitting/receiving side from the end side,
- an inlet formed in the holder to communicate an exterior of the holder with the interior space;
- and
- a metal couplant being a liquid state configured to be injected in the interior space via the inlet under condition where the opening of the holder closely contacts with the surface of a pressure vessel without a gap therebetween.
Dependencies are inferred from the claim text.