Tubular penetration part for the vessel head of a nuclear reactor having dismountable thermal sleeve and inspection method

The tubular part (3) is a penetration adaptor for the vessel head of a nuclear reactor. The thermal sleeve (5) of the adaptor comprises two successive sections (5b, 5c) in the axial direction. The first tubular section (5b) comprises a terminal widening which rests on a bearing part in the bore (6)...

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description The tubular part (3) is a penetration adaptor for the vessel head of a nuclear reactor. The thermal sleeve (5) of the adaptor comprises two successive sections (5b, 5c) in the axial direction. The first tubular section (5b) comprises a terminal widening which rests on a bearing part in the bore (6) of the tubular penetration part (3) and an annular groove (12) machined in its inner wall. The second tubular section (5c) comprises at least two cylindrical sectors which can be deformed in flexion (20a, 20b), separated by at least two axially directed slots passing through the wall of the second tubular section (5c). Two attachment heels (22a, 22b) constituting the end parts of the cylindrical sections (20a, 20b) engage in the groove (12) of the first section (5b) in order to join the two sections (5b, 5c). La pièce tubulaire (3) est un adaptateur de traversée du couvercle de la cuve d'un réacteur nucléaire. La manchette thermique (5) de l'adaptateur comporte deux tronçons successifs (5b, 5c) dans la direction axiale. Le premier tronçon tubulaire (5b) comporte un épanouissement terminal venant reposer sur une partie d'appui dans l'alésage (6) de la pièce tubulaire de traversée (3) et une gorge annulaire (12) usinée dans sa paroi interne. Le second tronçon tubulaire (5c) comporte au moins deux secteurs cylindriques déformables en flexion (20a, 20b) séparés par au moins deux lumières de direction axiale traversant la paroi du second tronçon tubulaire (5c). Deux talons d'accrochage (22a, 22b) constituant les parties d'extrémité des secteurs cylindriques (20a, 20b) viennent s'engager dans la gorge (12) du premier tronçon (5b) pour réaliser la jonction des deux tronçons (5b, 5c).
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The thermal sleeve (5) of the adaptor comprises two successive sections (5b, 5c) in the axial direction. The first tubular section (5b) comprises a terminal widening which rests on a bearing part in the bore (6) of the tubular penetration part (3) and an annular groove (12) machined in its inner wall. The second tubular section (5c) comprises at least two cylindrical sectors which can be deformed in flexion (20a, 20b), separated by at least two axially directed slots passing through the wall of the second tubular section (5c). Two attachment heels (22a, 22b) constituting the end parts of the cylindrical sections (20a, 20b) engage in the groove (12) of the first section (5b) in order to join the two sections (5b, 5c). La pièce tubulaire (3) est un adaptateur de traversée du couvercle de la cuve d'un réacteur nucléaire. La manchette thermique (5) de l'adaptateur comporte deux tronçons successifs (5b, 5c) dans la direction axiale. Le premier tronçon tubulaire (5b) comporte un épanouissement terminal venant reposer sur une partie d'appui dans l'alésage (6) de la pièce tubulaire de traversée (3) et une gorge annulaire (12) usinée dans sa paroi interne. Le second tronçon tubulaire (5c) comporte au moins deux secteurs cylindriques déformables en flexion (20a, 20b) séparés par au moins deux lumières de direction axiale traversant la paroi du second tronçon tubulaire (5c). Deux talons d'accrochage (22a, 22b) constituant les parties d'extrémité des secteurs cylindriques (20a, 20b) viennent s'engager dans la gorge (12) du premier tronçon (5b) pour réaliser la jonction des deux tronçons (5b, 5c).</abstract><edition>5</edition><oa>free_for_read</oa></addata></record>
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language eng ; fre
recordid cdi_epo_espacenet_FR2701785A1
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subjects GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
title Tubular penetration part for the vessel head of a nuclear reactor having dismountable thermal sleeve and inspection method
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