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Evaluation of hydride blisters in zirconium pressure tube in CANDU reactor

Abstract

When the garter springs for maintaining the gap between the pressure tube and the calandria tube are displaced in the CANDU reactor, the sagging of pressure tube results in a contact to the calandria tube. This causes a temperature difference between the inner and outer surface of the pressure tube. The hydride can be formed at the cold spot of outer surface and the volume expansion by hydride dormation causes the blistering in the zirconium alloys. An incident of pressure tube rupture due to the hydride blisters had happened in the Canadian CANDU reactor. This report describes the theoretical development and models on the formation and growth of hydride blister and some experimental results. The evaluation methodology and non-destructive testing for hydride blister in operating reactors are also described.
Publication Date:
Sep 01, 2000
Product Type:
Technical Report
Report Number:
KAERI/TR-1675/2000
Reference Number:
EDB-01:093528
Resource Relation:
Other Information: 32 figs, 3 tabs; PBD: Sep 2000
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; BLISTERS; CALANDRIAS; CALCULATION METHODS; CANDU TYPE REACTORS; DIFFUSION; DOUGLAS POINT ONTARIO REACTOR; EXPERIMENTAL DATA; FAILURES; HYDRIDES; NONDESTRUCTIVE TESTING; PRESSURE TUBES; RUPTURES; TEMPERATURE GRADIENTS; ZIRCONIUM ALLOYS
OSTI ID:
20199297
Research Organizations:
Korea Atomic Energy Research Institute, Taejon (Korea, Republic of)
Country of Origin:
Korea, Republic of
Language:
Korean
Other Identifying Numbers:
TRN: KR0100815049234
Availability:
Available from INIS in electronic form; Also available from Korea Atomic Energy Research Institute, Taejon (Korea, Republic of)
Submitting Site:
KRN
Size:
76 pages
Announcement Date:

Citation Formats

Cheong, Y M, Kim, Y S, Gong, U S, Kwon, S C, Kim, S S, and Choo, K N. Evaluation of hydride blisters in zirconium pressure tube in CANDU reactor. Korea, Republic of: N. p., 2000. Web.
Cheong, Y M, Kim, Y S, Gong, U S, Kwon, S C, Kim, S S, & Choo, K N. Evaluation of hydride blisters in zirconium pressure tube in CANDU reactor. Korea, Republic of.
Cheong, Y M, Kim, Y S, Gong, U S, Kwon, S C, Kim, S S, and Choo, K N. 2000. "Evaluation of hydride blisters in zirconium pressure tube in CANDU reactor." Korea, Republic of.
@misc{etde_20199297,
title = {Evaluation of hydride blisters in zirconium pressure tube in CANDU reactor}
author = {Cheong, Y M, Kim, Y S, Gong, U S, Kwon, S C, Kim, S S, and Choo, K N}
abstractNote = {When the garter springs for maintaining the gap between the pressure tube and the calandria tube are displaced in the CANDU reactor, the sagging of pressure tube results in a contact to the calandria tube. This causes a temperature difference between the inner and outer surface of the pressure tube. The hydride can be formed at the cold spot of outer surface and the volume expansion by hydride dormation causes the blistering in the zirconium alloys. An incident of pressure tube rupture due to the hydride blisters had happened in the Canadian CANDU reactor. This report describes the theoretical development and models on the formation and growth of hydride blister and some experimental results. The evaluation methodology and non-destructive testing for hydride blister in operating reactors are also described.}
place = {Korea, Republic of}
year = {2000}
month = {Sep}
}