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Analysis of shadowing effect produced by irregularly positioned transient rods during combined pulse operation in NSRR, (1)

Technical Report:

Abstract

In NSRR, pulse operation is performed by rapid withdrawals of three transient control rods at low power or high power critical. Under combined pulse operation mode, the pulse operation follows a high power operation up to 10 MW (for several seconds) which is controlled by a bank operation of regulating control rods. During the high power operation, the transient control rods are irregularly inserted into the core to prepare for the pulse operation at the end of the run. Partial or full insertion of the transient rod causes so called shadowing effect, that is, neutronic instruments located closer to the deeply inserted rod indicates lower reactor power than the others. The shadowing effects on the neutronic instruments are evaluated by three-dimensional neutron diffusion calculation of NSRR. (author).
Authors:
Nakamura, Takehiko; Yachi, Shigeyasu; Ishijima, Kiyomi; [1]  Hosoyamada, Ryuji
  1. Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment
Publication Date:
Nov 01, 1991
Product Type:
Technical Report
Report Number:
JAERI-M-91-185
Reference Number:
SCA: 220600; PA: JPN-91:012210; SN: 92000659244
Resource Relation:
Other Information: PBD: Nov 1991
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; NSRR REACTOR; CONTROL ROD DRIVES; SHADOW EFFECT; PULSED NEUTRON TECHNIQUES; REACTOR OPERATION; TRANSIENTS; CONTROL ELEMENTS; NEUTRON DIFFUSION EQUATION; THREE-DIMENSIONAL CALCULATIONS; 220600; RESEARCH, TEST, TRAINING, PRODUCTION, IRRADIATION, MATERIALS TESTING REACTORS
OSTI ID:
10117126
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE92768132; TRN: JP9112210
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
JPN
Size:
103 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Nakamura, Takehiko, Yachi, Shigeyasu, Ishijima, Kiyomi, and Hosoyamada, Ryuji. Analysis of shadowing effect produced by irregularly positioned transient rods during combined pulse operation in NSRR, (1). Japan: N. p., 1991. Web.
Nakamura, Takehiko, Yachi, Shigeyasu, Ishijima, Kiyomi, & Hosoyamada, Ryuji. Analysis of shadowing effect produced by irregularly positioned transient rods during combined pulse operation in NSRR, (1). Japan.
Nakamura, Takehiko, Yachi, Shigeyasu, Ishijima, Kiyomi, and Hosoyamada, Ryuji. 1991. "Analysis of shadowing effect produced by irregularly positioned transient rods during combined pulse operation in NSRR, (1)." Japan.
@misc{etde_10117126,
title = {Analysis of shadowing effect produced by irregularly positioned transient rods during combined pulse operation in NSRR, (1)}
author = {Nakamura, Takehiko, Yachi, Shigeyasu, Ishijima, Kiyomi, and Hosoyamada, Ryuji}
abstractNote = {In NSRR, pulse operation is performed by rapid withdrawals of three transient control rods at low power or high power critical. Under combined pulse operation mode, the pulse operation follows a high power operation up to 10 MW (for several seconds) which is controlled by a bank operation of regulating control rods. During the high power operation, the transient control rods are irregularly inserted into the core to prepare for the pulse operation at the end of the run. Partial or full insertion of the transient rod causes so called shadowing effect, that is, neutronic instruments located closer to the deeply inserted rod indicates lower reactor power than the others. The shadowing effects on the neutronic instruments are evaluated by three-dimensional neutron diffusion calculation of NSRR. (author).}
place = {Japan}
year = {1991}
month = {Nov}
}