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Evaluation of shut down margin in scram condition for High Temperature Engineering Test Reactor (HTTR)

Technical Report:

Abstract

The reactor outlet coolant temperature of High Temperature Engineering Test Reactor (HTTR) aims to achieve extremely high temperature of 950degC. In order to mitigate a damage of control rod casing in high temperature environment, the two-step control rods insertion method was adopted. In case of reactor scram, the control rods in reflector region are inserted in the core immediately, then the control rods in fuel region are inserted automatically after the reactor outlet coolant temperature decreases down to 750degC or after the present time of 2400 sec is elapsed. This report describes the evaluation results of shutdown margin when the control rods in the fuel region are inserted after reactor scram. It was found from the present study that the shutdown margin with one control rod stuck is higher than 0.7% {Delta}k/k in the severest case. (author).
Authors:
Murata, Isao; Yamashita, Kiyonobu; Maruyama, So; Fujimoto, Nozomu; Shindo, Ryuichi; Sudo, Yukio [1] 
  1. Japan Atomic Energy Research Inst., Oarai, Ibaraki (Japan). Oarai Research Establishment
Publication Date:
Oct 01, 1991
Product Type:
Technical Report
Report Number:
JAERI-M-91-165
Reference Number:
SCA: 220600; 210300; PA: JPN-91:012205; SN: 92000659239
Resource Relation:
Other Information: PBD: Oct 1991
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; HTTR REACTOR; CONTROL ROD DRIVES; SCRAM; TEMPERATURE RANGE 1000-4000 K; CRITICALITY; TEMPERATURE DISTRIBUTION; TIME DEPENDENCE; BORON CARBIDES; LIFETIME; ROD DROP METHOD; 220600; 210300; RESEARCH, TEST, TRAINING, PRODUCTION, IRRADIATION, MATERIALS TESTING REACTORS; POWER REACTORS, NONBREEDING, GRAPHITE MODERATED
OSTI ID:
10117401
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE92768127; TRN: JP9112205
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
JPN
Size:
77 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Murata, Isao, Yamashita, Kiyonobu, Maruyama, So, Fujimoto, Nozomu, Shindo, Ryuichi, and Sudo, Yukio. Evaluation of shut down margin in scram condition for High Temperature Engineering Test Reactor (HTTR). Japan: N. p., 1991. Web.
Murata, Isao, Yamashita, Kiyonobu, Maruyama, So, Fujimoto, Nozomu, Shindo, Ryuichi, & Sudo, Yukio. Evaluation of shut down margin in scram condition for High Temperature Engineering Test Reactor (HTTR). Japan.
Murata, Isao, Yamashita, Kiyonobu, Maruyama, So, Fujimoto, Nozomu, Shindo, Ryuichi, and Sudo, Yukio. 1991. "Evaluation of shut down margin in scram condition for High Temperature Engineering Test Reactor (HTTR)." Japan.
@misc{etde_10117401,
title = {Evaluation of shut down margin in scram condition for High Temperature Engineering Test Reactor (HTTR)}
author = {Murata, Isao, Yamashita, Kiyonobu, Maruyama, So, Fujimoto, Nozomu, Shindo, Ryuichi, and Sudo, Yukio}
abstractNote = {The reactor outlet coolant temperature of High Temperature Engineering Test Reactor (HTTR) aims to achieve extremely high temperature of 950degC. In order to mitigate a damage of control rod casing in high temperature environment, the two-step control rods insertion method was adopted. In case of reactor scram, the control rods in reflector region are inserted in the core immediately, then the control rods in fuel region are inserted automatically after the reactor outlet coolant temperature decreases down to 750degC or after the present time of 2400 sec is elapsed. This report describes the evaluation results of shutdown margin when the control rods in the fuel region are inserted after reactor scram. It was found from the present study that the shutdown margin with one control rod stuck is higher than 0.7% {Delta}k/k in the severest case. (author).}
place = {Japan}
year = {1991}
month = {Oct}
}