JP2016010805A5

JP2016010805A5 -

Info

Publication number: JP2016010805A5
Application number: JP2014133808A
Authority: JP
Filing date: 2014-06-30
Publication date: 2017-03-30
Anticipated expiration: 2034-06-30

Claims

In the welding method of the heat transfer copper fin for metal casks of any one of Claim 3 thru | or 7,
When the heat transfer Netsudo thickness T1 of the fins is 5mm, the CuSi wire wire welding sectional area Aw is 30 mm ² or more 55 mm ² or less ^{(30 ≦ Aw ≦ 55mm 2)} , the welding heat input Q is 12 kJ / cm or more While using the condition of 35 kJ / cm or less (12 ≦ Q ≦ 35 kJ / cm), the position where the position of the CuSi wire or the torch position is shifted to the surface side of the heat transfer copper fin by a predetermined distance should be welded For a metal cask characterized in that it is determined to be a weld line of a fillet joint part, and then welded to the weld line of the fillet joint part by composite welding of the preceding TIG and subsequent MIG or the MIG welding Welding method for heat transfer copper fins.

In the welding method of the heat transfer copper fin for metal casks of Claim 4 or 7 ,
Instead of the throat thickness L, the following first empirical formula (1) showing the relationship between the bead vertical height H and the throat thickness L is used, from the steel side surface near the weld bead to the copper side. The bead vertical height H up to the weld bead toe is measured by the measuring means, and the value of the bead vertical height H measured by the measuring means is substituted into the first empirical formula (1) to determine the inside of the weld. The value of the throat thickness L is calculated, and it is determined whether or not the calculated value of the throat thickness L satisfies the L ≧ T1. Welding method.
First empirical formula: L≈b1 × H (1)
However, b1 is a constant of 1.

In the welding method of the heat transfer copper fin for metal casks of any one of Claim 2, 4 or 7 ,
In place of the penetration depth c, the bead vertical height H is measured using the following second empirical formula (2) showing the relationship between the bead vertical height H and the penetration depth c. And the value of the bead vertical height H measured by the measuring means is substituted into the second empirical formula (2) to calculate the value of the penetration depth c inside the weld. It is determined whether or not the value of the penetration depth c satisfies the predetermined 0.05 ≦ c ≦ 6 mm, or the relationship between the previously prepared throat thickness L and the penetration depth c is shown below. 3 and the following first experimental formula (1) showing the relationship between the bead vertical height H and the throat thickness L, the measured value of the bead vertical height H is The value of the throat thickness L inside the weld is calculated by substituting it into the first empirical formula (1), and the calculated value of the throat thickness L is substituted into the third empirical formula (3). A metal characterized by calculating a value of a penetration depth c inside the contact and determining whether or not the calculated value of the penetration depth c satisfies a predetermined 0.05 ≦ c ≦ 6 mm Welding method for heat transfer copper fin for cask.
First empirical formula: L≈b1 × H (1)
Second empirical formula: C = b2 × H ³ + b3 × H ² + b4 × H + b5 (2)
Third empirical formula: C = b6 × L ³ + b7 × L ² + b8 × L + b9 (3)
However, b1 is a constant, b2 is a constant of -0.0067, b3 is a constant of 0.22, b4 is a constant of -2.62, b5 is a constant of 10.3, and b6 is a constant of -0.0067. B7 is a constant of 0.24, b8 is a constant of -2.87, and b9 is a constant of 11.4.

In the welding method of the heat transfer copper fin for metal casks of any one of Claims 9 thru | or 11 ,
The means for automatically measuring the bead vertical height H is a slit light cutting type sensor, and the slit light cutting type sensor is disposed at an upper position on the surface of the weld bead after the end of welding, and the welding bead on the welding start side is arranged. The slit light cutting type is moved on the welding line from the surface position to the welding bead surface position on the welding end side, or moved backward on the welding line in the direction of the welding start side from the direction on the welding end side. Let the sensor perform a detection action,
A line image representing the shape of the weld bead surface portion and the vicinity thereof from the slit light cutting type sensor is taken into an image processing apparatus at substantially constant time intervals or at substantially constant distances, and subjected to image processing. Draw an extended straight line by extending the straight part of the surface part in the direction of the bead toe part, and determine the point of intersection of the other bead toe part intersecting with the straight part of the other copper side base metal surface part as a point , A position where a straight line drawn in a direction perpendicular to the point a and the extended line intersects the extension line at a right angle is determined as a point d, and a distance between the points a and d (a point−d Point), the measured distance (point a-point d) is specified as the value of the bead vertical height H, and the value of the bead vertical height H is determined as the first empirical formula (1). A method for welding a heat transfer copper fin for a metal cask, wherein the value of the throat thickness L inside the weld is calculated by substituting

A steel inner cylinder that houses an assembly of spent fuel having a radioactive substance, a steel outer cylinder that is coaxially disposed outside the inner cylinder, and a circumference between the inner cylinder and the outer cylinder With a plurality of copper heat transfer copper fins inclined and arranged at substantially equal intervals in the direction,
Each fillet joint portion having a wide-angle inclination on the inner cylinder side formed by abutting one end face portions of the heat transfer copper fins at substantially equal intervals in the longitudinal direction of the outer surface of the inner cylinder made of steel, or Each outer joint side wide-angle inclined fillet joint portion formed by abutting the other end face portions of the predetermined number of heat transfer copper fins at substantially equal intervals in the longitudinal direction of the inner cylinder inner surface, or the inner cylinder And a metal cask with heat transfer copper fins formed by welding each fillet joint formed on both surfaces of the outer cylinder, one pass at a time by composite welding of the preceding TIG and the subsequent MIG or MIG welding. And
A plate having a heat transfer copper fin having a throat thickness L of at least the throat thickness L at a welded portion of each fillet joint portion welded by one pass by a composite welding of the preceding TIG and the subsequent MIG or the MIG welding using a CuSi wire. It is formed in thickness T1 or more, and the penetration depth c of the steel inner cylinder side or the outer cylinder side or both sides of the inner cylinder and the outer cylinder is formed in a range of 0.05 ≦ c ≦ 4 mm. A metal cask with heat transfer copper fins.