Published June 2024 | Version v1
Report Restricted

Differential pressure rise event for filters of HTTR primary helium gas circulators (2). Investigation of filter deposits and recurrence prevention measures

Creators

  • 1. Japan Atomic Energy Agency, Sector of Fast Reactor and Advanced Reactor Research and Development, Oarai Research and Development Institute, HTGR Research and Development Center, Department of HTTR, Oarai, Ibaraki (Japan)
  • 2. Japan Atomic Energy Agency, Sector of Fast Reactor and Advanced Reactor Research and Development, Oarai Research and Development Institute, Fast Reactor Cycle System Research and Development Center, Fuels and Materials Department, Oarai, Ibaraki (Japan)

Description

In order to investigate the cause of the increase in differential pressure in the primary helium circulator filter that occurred during the RS-14 cycle, a clogged filter was investigated. As a result of the investigation, deposits caused by silicone oil were confirmed on the surface of the filter element. These results revealed that the cause of filter clogging was silicone oil mixed into the primary system due to performance deterioration of the charcoal filter in the gas circulator of primary helium purification system. As a measure to prevent the recurrence of this event, in addition to the conventional management based on operating hours for replacing of charcoal filter in the gas circulator of primary helium purification system, we have established a new replacement plan for every three years. (author)

Availability note (English)

Also available from DOI: https://doi.org/10.11484/jaea-technology-2024-003

Abstract (Japanese)

RS-14サイクルに発生した1次ヘリウム循環機フィルタの差圧上昇の原因を調査するため、フィルタ付着物を調査した。調査の結果、フィルタエレメント表面にシリコンオイルに起因する付着物を確認した。この結果から、フィルタ差圧上昇の原因は、1次ヘリウム純化設備ガス循環機のチャコールフィルタの性能劣化により、1次系内にシリコンオイルが混入したためであることが明らかとなった。また、この再発防止対策として、従来の1次ヘリウム純化設備ガス循環機の運転時間による管理に加え、チャコールフィルタの交換頻度を3年毎とする定期交換計画を新たに策定した。(著者)

Files

Restricted

The record is publicly accessible, but files are restricted to users with access.

Additional details

Additional titles

Original title (Japanese)
HTTR1次ヘリウム循環機フィルタの差圧上昇事象(2).フィルタ付着物の調査と再発防止対策

Identifiers

DOI
10.11484/jaea-technology-2024-003;

Publishing Information

Imprint Title
Differential pressure rise event for filters of HTTR primary helium gas circulators (2). Investigation of filter deposits and recurrence prevention measures
Imprint Pagination
26 p.
Report number
JAEA-Technology--2024-003

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
56006855
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
AIR FILTERS; CHARCOAL; DOSE RATES; HELIUM; HTTR REACTOR; ORGANIC SOLVENTS; QUALITY ASSURANCE; RADIATION PROTECTION; REACTOR OPERATION; SCANNING ELECTRON MICROSCOPY; THERMAL INSULATION; X-RAY SPECTROSCOPY
Descriptors DEC
ADSORBENTS; ELECTRON MICROSCOPY; ELEMENTS; ENRICHED URANIUM REACTORS; EQUIPMENT; EXPERIMENTAL REACTORS; FILTERS; FLUIDS; GAS COOLED REACTORS; GASES; GRAPHITE MODERATED REACTORS; HELIUM COOLED REACTORS; HTGR TYPE REACTORS; MANAGEMENT; MICROSCOPY; NONAQUEOUS SOLVENTS; NONMETALS; OPERATION; POLLUTION CONTROL EQUIPMENT; QUALITY MANAGEMENT; RARE GASES; REACTOR LIFE CYCLE; REACTORS; RESEARCH AND TEST REACTORS; SOLVENTS; SPECTROSCOPY

Optional Information

Notes
7 refs., 12 figs., 4 tabs.