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Critical element development of double seal door for tritium containment

Technical Report:

Abstract

In fusion experimental reactors, the in-vessel components such as blanket are activated due to D-T operation and they have to be assembled and replaced by remote operation through port penetration of plasma vacuum vessel. A double seal door is inevitably required at an interface between vacuum vessel port and maintenance cask in order to avoid the dispersion of tritium and activated dust during in-vessel component handling. The double seal door should have two open/close doors with four seal surfaces so as to keep leak tightness both of the vacuum vessel and the maintenance cask when doors closed, and to provide access space for handling in-vessel components when doors opened. A prototype compact double seal door with an attractive kinematics of parabolic trajectory has been proposed so as to minimize dead space for the door open/close operation, compared with ordinary slide or hinge type door. Based on this design concept, a sub-scaled model of double seal door with trapezoidal cross-section of around 0.2 m{sup 2} has been fabricated. Through the preliminary experiments such as open/close performance, the double seal door mechanism with parabolic trajectory has been successfully demonstrated. As for leak tightness, seal characteristics of a polyimide ring irradiated up to  More>>
Authors:
Kanamori, Naokazu; Kakudate, Satoshi; Oka, Kiyoshi; Nakahira, Masataka; Taguchi, Kou; Obara, Kenjiro; Tada, Eisuke; Shibanuma, Kiyoshi; Seki, Masahiro [1] 
  1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
Publication Date:
Aug 01, 1994
Product Type:
Technical Report
Report Number:
JAERI-Tech-94-012
Reference Number:
SCA: 700480; PA: JPN-94:012129; EDB-95:026598; SN: 95001319937
Resource Relation:
Other Information: PBD: Aug 1994
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; D-T REACTORS; TRITIUM; CONTAINMENT SYSTEMS; BREEDING BLANKETS; CONTAINMENT BUILDINGS; SECURITY SEALS; PHYSICAL PROTECTION; LEAKS; 700480; COMPONENT DEVELOPMENT; MATERIALS STUDIES
OSTI ID:
10109262
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE95737221; TRN: JP9412129
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
25 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Kanamori, Naokazu, Kakudate, Satoshi, Oka, Kiyoshi, Nakahira, Masataka, Taguchi, Kou, Obara, Kenjiro, Tada, Eisuke, Shibanuma, Kiyoshi, and Seki, Masahiro. Critical element development of double seal door for tritium containment. Japan: N. p., 1994. Web.
Kanamori, Naokazu, Kakudate, Satoshi, Oka, Kiyoshi, Nakahira, Masataka, Taguchi, Kou, Obara, Kenjiro, Tada, Eisuke, Shibanuma, Kiyoshi, & Seki, Masahiro. Critical element development of double seal door for tritium containment. Japan.
Kanamori, Naokazu, Kakudate, Satoshi, Oka, Kiyoshi, Nakahira, Masataka, Taguchi, Kou, Obara, Kenjiro, Tada, Eisuke, Shibanuma, Kiyoshi, and Seki, Masahiro. 1994. "Critical element development of double seal door for tritium containment." Japan.
@misc{etde_10109262,
title = {Critical element development of double seal door for tritium containment}
author = {Kanamori, Naokazu, Kakudate, Satoshi, Oka, Kiyoshi, Nakahira, Masataka, Taguchi, Kou, Obara, Kenjiro, Tada, Eisuke, Shibanuma, Kiyoshi, and Seki, Masahiro}
abstractNote = {In fusion experimental reactors, the in-vessel components such as blanket are activated due to D-T operation and they have to be assembled and replaced by remote operation through port penetration of plasma vacuum vessel. A double seal door is inevitably required at an interface between vacuum vessel port and maintenance cask in order to avoid the dispersion of tritium and activated dust during in-vessel component handling. The double seal door should have two open/close doors with four seal surfaces so as to keep leak tightness both of the vacuum vessel and the maintenance cask when doors closed, and to provide access space for handling in-vessel components when doors opened. A prototype compact double seal door with an attractive kinematics of parabolic trajectory has been proposed so as to minimize dead space for the door open/close operation, compared with ordinary slide or hinge type door. Based on this design concept, a sub-scaled model of double seal door with trapezoidal cross-section of around 0.2 m{sup 2} has been fabricated. Through the preliminary experiments such as open/close performance, the double seal door mechanism with parabolic trajectory has been successfully demonstrated. As for leak tightness, seal characteristics of a polyimide ring irradiated up to 10 MGy have been measured. (author).}
place = {Japan}
year = {1994}
month = {Aug}
}