JPS5861496A - Shielding structure of pipe through portion - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は配管貫通部に係り、特に高温薄肉配管で熱移動
の大きい配管貫通部の遮蔽に好適な配管貫通部遮蔽構造
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to pipe penetrations, and particularly to a pipe penetration shielding structure suitable for shielding pipe penetrations that are high-temperature, thin-walled pipes and undergo large heat transfer.

第１図（イ）６：Ｉ）及び第２図（イ）（ロ）は、従来
技術による配管貫通部遮蔽構造を示したものである。第
１図（イ）（ロ）において、保温材１を有した配管２が
コンクリート３を貫通しているが、当該コンクリート３
の貫通部スリーブ４の大きさは、配管熱移動を拘束しな
い機関孔面積を大きく取っている。従って配管２とスリ
ーブ４内面との間隙を透過する放射線の遮蔽に関しては
問題が多い。この対策゛として貫通部コンクリート３側
にリング状の遮蔽カラー７及び配管軸方向の熱移動量を
考慮した位置の配管２に取付金具６を介してリング状の
配管側遮蔽カラー５をコンクリート側遮蔽カラー７と重
ね合わせた形に設けている。配管側遮蔽カラー５は、当
該配管２の軸直角方向の熱移動量Ｂを考慮した大きさに
なっており、配管軸方向熱移動時にコンクリート側遮蔽
カラー７とに隙間が生じ放射線透過がなき大きさである
様にリング外径寸法を決めている。このため、配管側遮
蔽カラー５は、大形で、江つ、大重量となり第２図（ロ
）断面ａａに示す様に薄肉配管であることから遮蔽カラ
ー取付部配管にひずみδが生じ過大な応力が集中し配管
破損等の重大事故が生じることも考えられ、特に、地震
時の配管構造の成立性、健全性が問題上なる。FIG. 1(a) 6:I) and FIG. 2(a) and (b) show a pipe penetration portion shielding structure according to the prior art. In Fig. 1 (a) and (b), the pipe 2 having the heat insulating material 1 penetrates through the concrete 3.
The size of the penetration sleeve 4 is such that the area of the engine hole is large enough to not restrict heat transfer in the piping. Therefore, there are many problems in shielding radiation that passes through the gap between the pipe 2 and the inner surface of the sleeve 4. As a countermeasure for this, a ring-shaped shielding collar 7 is installed on the concrete 3 side of the penetration part, and a ring-shaped piping-side shielding collar 5 is installed on the concrete side via a mounting bracket 6 on the piping 2 at a position that takes into account the amount of heat transfer in the axial direction of the piping. It is provided in a shape that overlaps color 7. The pipe-side shielding collar 5 is sized in consideration of the amount of heat transfer B in the direction perpendicular to the axis of the pipe 2, and is sized so that a gap is created with the concrete-side shielding collar 7 when heat transfers in the axial direction of the pipe, resulting in no radiation transmission. The outer diameter of the ring is determined so that it is the same. For this reason, the piping-side shielding collar 5 is large, thick, and heavy, and as shown in cross section aa in Figure 2 (b), since it is a thin-walled piping, strain δ occurs in the piping at the shielding collar attachment part, resulting in excessive stress. Stress concentration may cause serious accidents such as pipe damage, and in particular, the viability and soundness of the piping structure during an earthquake will be a problem.

第２図（イ）は、配管側遮蔽カラー５の詳細を示したも
のである。遮蔽カラー５は、取付時の作業性を考え数分
割化されており、これを２つ割のバンド状から成る取付
金具６にボルト、ナツト８により固定され、−更に、取
付金具６がボルト、ナツト９により配管２に固定されて
いるが、前記の如く、大形で重量が重いためカラー搬入
、取付が非常に大変であるという問題も有する。FIG. 2(a) shows details of the piping-side shielding collar 5. The shielding collar 5 is divided into several parts in consideration of workability during installation, and is fixed to a mounting bracket 6 consisting of a two-part band shape with bolts and nuts 8. Although it is fixed to the piping 2 with the nut 9, as mentioned above, it is large and heavy, so it has the problem that it is very difficult to carry in and install the collar.

本発明は、従来技術にみられた問題点を解消することを
目的とするもので、放射線に対する遮蔽効果を十分に保
証するとともに、配管の強度の面でも問題のない信頼性
、健全性の優れた配管貫通部遮蔽構造を提供するもので
ある。The purpose of the present invention is to solve the problems seen in the prior art, and it not only ensures a sufficient shielding effect against radiation, but also provides excellent reliability and soundness without any problem in terms of the strength of the piping. The present invention provides a pipe penetration part shielding structure.

本発明は、上記目的を果たすために従来の配管側遮蔽カ
ラーの支持を配管と壁コンクリ−ト側に設けた摺動部に
分散することにより配管にかかる荷重の軽減を計り、且
つ、遮蔽効果も十分に満足する配管熱移動追従可能な貫
通部遮蔽カラー構造とするものである。In order to achieve the above object, the present invention reduces the load on the piping by distributing the support of the conventional piping-side shielding collar between the piping and the sliding parts provided on the wall concrete side, and also improves the shielding effect. The purpose of the present invention is to provide a penetrating portion shielding collar structure that is capable of following piping heat transfer that fully satisfies the above requirements.

以下、本発明の一実施例を第３図（イ）（ロ）（ハ）、
第４図に示す。Hereinafter, one embodiment of the present invention will be described in FIGS. 3(a), (b), and
It is shown in Figure 4.

本発明による配管貫通部遮蔽構造では、配管側支持とな
る遮蔽カラー５と壁コンクリート側にて支持する摺動部
側遮蔽カラー１０により構成される遮蔽構造である。配
管２に取付支持される配管　、側遮蔽カラー５は配管に
かかる荷重を可能な限ぎり軽減させるため、摺動部側遮
蔽カラー１０との取合を考慮し、配管保温１とほぼ同様
な外径寸法から成るリング形状となっている。このだめ
、従来構造にて問題の一つとして有する作業性の問題は
大幅に改善される。リング状の配管側遮蔽カラーに接続
する摺動部遮蔽カラー１０は、遮蔽カラー支持が容易な
よう長方形の中央分割の２つ網形状からなり−１その大
きさは配管軸方内熱移動時遮蔽効果を損うことのない大
きさとなっている。また、遮蔽カラー１０の支持は、貫
通部コンクリート３に取付けた摺動部カバー１１内に上
下左右４方向に設けられたコロ１２により支持される。The piping penetration part shielding structure according to the present invention is a shielding structure composed of a shielding collar 5 that supports the piping side and a sliding part side shielding collar 10 that supports the wall concrete side. In order to reduce the load on the piping 2 and the side shielding collar 5 as much as possible, the side shielding collar 5 has an outer structure that is almost the same as the piping insulation 1, taking into consideration the connection with the sliding part side shielding collar 10. It has a ring shape consisting of diameter dimensions. As a result, the problem of workability, which is one of the problems in the conventional structure, is significantly improved. The sliding part shielding collar 10 connected to the ring-shaped piping-side shielding collar has a rectangular center-divided two-mesh shape for easy support of the shielding collar. The size is such that the effect is not compromised. Further, the shielding collar 10 is supported by rollers 12 provided in four directions, up, down, right and left, within a sliding part cover 11 attached to the concrete 3 of the penetration part.

コロ１２は、配管熱移動に伴なう遮蔽カラーの摺動時抵
抗により摺動部が破壊しない機構動性を容易にし健全性
を維持するために設けたものである。The rollers 12 are provided in order to facilitate mechanical movement and maintain soundness so that the sliding portion will not be destroyed due to resistance during sliding of the shielding collar due to heat transfer of the piping.

配管側遮蔽カラー５と摺動部側遮蔽カラー１０との取合
部は、第３図（ハ）Ａ部詳細に示すように、周方向に設
けたボルト・ナツト１３により取合う。The piping-side shielding collar 5 and the sliding part-side shielding collar 10 are joined together by bolts and nuts 13 provided in the circumferential direction, as shown in detail at section A in FIG. 3(c).

取合部は、遮蔽及び配管の軸方向熱動を拘束或いは損う
ことのないようオフセット形状としている。The connecting portion has an offset shape so as not to restrict or impair the axial thermal movement of the shield and piping.

第４図は、配管側遮蔽カラー５と摺動部側遮蔽カラー１
０との数台形状を差し込み構造としたもので、配管側遮
蔽カラー５の厚さは、配管軸方向熱移動を吸収するため
の欠損を有すため、遮蔽効果を損なうことのなきよう欠
損分だけ厚くなっている。Figure 4 shows the piping side shielding collar 5 and the sliding part side shielding collar 1.
The thickness of the piping-side shielding collar 5 has a defect to absorb heat transfer in the axial direction of the pipe, so the thickness of the piping-side shielding collar 5 is adjusted so as not to impair the shielding effect. It's just thicker.

本発明による配管貫通部遮蔽構造によれば、遮蔽カラー
取付部にかかる荷重は大幅に軽減されるため、配管のひ
ずみ変形は大幅に減小せしめることになり、配管の健全
性は大幅に向上する。また、遮蔽カラーは放射線に対す
る遮蔽効果も損なうことなく、配管の熱移動に追従でき
るため、遮蔽カラー取付部配管に対する信頼性、健全性
は著るしく高められることばかりでなく、放射線に対す
る安全性も十分保証でき、機器の放射化防止及びプラン
ト健全性大幅向上の効果がある。According to the piping penetration shielding structure according to the present invention, the load applied to the shielding collar attachment part is significantly reduced, so the strain and deformation of the piping is significantly reduced, and the integrity of the piping is greatly improved. . In addition, since the shielding collar can follow the heat transfer of the piping without impairing its radiation shielding effect, it not only significantly improves the reliability and soundness of the piping where the shielding collar is attached, but also improves the safety against radiation. It can be fully guaranteed and has the effect of preventing equipment radiation and greatly improving plant integrity.

【図面の簡単な説明】[Brief explanation of drawings]

第１図（イ）及び０）は従来例の配管貫通部遮蔽構造の
平面図及び側面図、第２図（イ）及び（ロ）は配管側遮
蔽力、ラー構造詳細図及び断面図、第３図（イ）（ロ）
及び（ハ）は本発明に適用した配管貫通部遮蔽構造の平
面図、側面図及びＡ部詳細図、第４図は配管側支持カラ
ーと摺動側支持カラーの接続部の構造図である。Figures 1 (a) and 0) are a plan view and side view of a conventional pipe penetration shielding structure, Figures 2 (a) and (b) are a diagram showing the shielding force on the piping side, a detailed view of the lar structure, and a sectional view. Figure 3 (a) (b)
and (c) are a plan view, a side view, and a detailed view of part A of the piping penetration part shielding structure applied to the present invention, and FIG. 4 is a structural diagram of the connection part between the piping side support collar and the sliding side support collar.

Claims (1)

【特許請求の範囲】[Claims] １、　放射線量が高く遮蔽を必要とする配管貫通部で壁
コンクリート等の貫通開口部に設けたスリー・ブの内部
を貫通する配管の外表面に遮蔽体カラーを有してなる配
管貫通部遮蔽構造において、前記配管への負荷を軽減さ
せるため遮蔽体カラー支持を貫通部壁に設けた摺動部に
より行ない、配管熱移動に対し追従可能な様にしたこと
を特徴とする配管貫通部遮蔽構造。1. Pipe penetration shielding that has a shielding collar on the outer surface of the pipe that penetrates the inside of a sleeve provided in a penetration opening in a wall concrete, etc. at a pipe penetration part where the radiation dose is high and requires shielding. A piping penetration shielding structure characterized in that, in order to reduce the load on the piping, the shielding collar is supported by a sliding part provided on the wall of the penetration part, so that it can follow the heat movement of the piping. .