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Development of reconstitution technique of irradiated specimen. Progress report for FY1993 on cooperated research between JAERI and IHI

Technical Report:

Abstract

Regulatory codes require the surveillance test to evaluate the irradiation embrittlement of reactor pressure vessel steel during operation. However, it is anticipated that the number of those specimens is insufficient in case plant life is extended. Reconstitution techniques by electron beam weld, laser weld, arc stud weld as well as surface-activated joining (SAJ) have been investigated for the reuse of undeformed parts from tested Charpy impact specimen. The important items for the reconstitution technique are to reduce the width of heat affected zone to maximize the material available, and to lower the maximum temperature of specimen during joining process to preclude the recovery of radiation damage. SAJ can be achieved from a removal of surface contamination by rotating one-side specimen in vacuum with applying modest friction force. Therefore, SAJ method is expected to be suitable for specimen reconstitution in view of material heating and melting. This paper describes preliminary study to develop Charpy specimen reconstitution technique using reactor pressure vessel steel, A533B-1, by SAJ method. Test results showed that the SAJ method had a capability of joining affected zone less than 1.5 mm in half width, and over-temperature region less than 3 mm in half width above reactor operating temperature  More>>
Authors:
Onizawa, Kunio; [1]  Fukaya, Kiyoshi; Nishiyama, Yutaka [2] 
  1. Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment
  2. and others
Publication Date:
Sep 01, 1994
Product Type:
Technical Report
Report Number:
JAERI-Tech-94-017
Reference Number:
SCA: 220200; PA: JPN-94:011249; EDB-95:007483; SN: 95001296283
Resource Relation:
Other Information: PBD: Sep 1994
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; RECYCLING; EMBRITTLEMENT; PRESSURE VESSELS; STEEL-MNNIMO; IRRADIATION; CAPSULES; CHARPY TEST; SAMPLING; JOINING; TRANSITION TEMPERATURE; 220200; COMPONENTS AND ACCESSORIES
OSTI ID:
10102348
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE95722091; TRN: JP9411249
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
66 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Onizawa, Kunio, Fukaya, Kiyoshi, and Nishiyama, Yutaka. Development of reconstitution technique of irradiated specimen. Progress report for FY1993 on cooperated research between JAERI and IHI. Japan: N. p., 1994. Web.
Onizawa, Kunio, Fukaya, Kiyoshi, & Nishiyama, Yutaka. Development of reconstitution technique of irradiated specimen. Progress report for FY1993 on cooperated research between JAERI and IHI. Japan.
Onizawa, Kunio, Fukaya, Kiyoshi, and Nishiyama, Yutaka. 1994. "Development of reconstitution technique of irradiated specimen. Progress report for FY1993 on cooperated research between JAERI and IHI." Japan.
@misc{etde_10102348,
title = {Development of reconstitution technique of irradiated specimen. Progress report for FY1993 on cooperated research between JAERI and IHI}
author = {Onizawa, Kunio, Fukaya, Kiyoshi, and Nishiyama, Yutaka}
abstractNote = {Regulatory codes require the surveillance test to evaluate the irradiation embrittlement of reactor pressure vessel steel during operation. However, it is anticipated that the number of those specimens is insufficient in case plant life is extended. Reconstitution techniques by electron beam weld, laser weld, arc stud weld as well as surface-activated joining (SAJ) have been investigated for the reuse of undeformed parts from tested Charpy impact specimen. The important items for the reconstitution technique are to reduce the width of heat affected zone to maximize the material available, and to lower the maximum temperature of specimen during joining process to preclude the recovery of radiation damage. SAJ can be achieved from a removal of surface contamination by rotating one-side specimen in vacuum with applying modest friction force. Therefore, SAJ method is expected to be suitable for specimen reconstitution in view of material heating and melting. This paper describes preliminary study to develop Charpy specimen reconstitution technique using reactor pressure vessel steel, A533B-1, by SAJ method. Test results showed that the SAJ method had a capability of joining affected zone less than 1.5 mm in half width, and over-temperature region less than 3 mm in half width above reactor operating temperature during joining. It was also found that transition temperature from reconstituted Charpy specimen could be evaluated. It can be concluded from these results that SAJ method is attractive technique for reconstituting the irradiated surveillance specimen. (author).}
place = {Japan}
year = {1994}
month = {Sep}
}