Countermeasure against Thermal Fatigue Crack of Primary Loop Recirculation Pump in BWR
-
- NODA Hiroshi
- Division of Energy and Environmental Systems, Graduate School of Engineering, Hokkaido University
-
- NARABAYASHI Tadashi
- Division of Energy and Environmental Systems, Graduate School of Engineering, Hokkaido University
-
- TAKAHASHI Yuuji
- Nuclear Division, The Federation of Electric Power Companies of Japan
Bibliographic Information
- Other Title
-
- 原子炉再循環ポンプ熱疲労割れ対策
- ゲンシロ サイジュンカン ポンプ ネツ ヒロウ ワレ タイサク
Search this article
Abstract
The reactor water was fed to the purge water of the mechanical seal on the original design of the primary loop recirculation pump. Because the mechanical seal had a short life due to the cruds in the reactor water, the clean purge water was adopted instead of the reactor water. After this modification, the shallow cracks were found on the surface of the pump shaft and casing cover due to the temperature fluctuation between the cold purge water and the hot pump discharge water. The fundamental mechanism and countermeasure were investigated by scale test, mock-up test and so on. The flow barrier with a heater was contrived through these tests. It has been introduced gradually in operating and constructing PLR pumps after its completion in 1995. The PLR pumps are overhauled around every 10 years in Japan. The first overhaul of the PLR pumps showed no cracks around the pump shaft and casing cover after 10 years' operation. This paper presents both its development process and inspection results.<br>
Journal
-
- Transactions of the Atomic Energy Society of Japan
-
Transactions of the Atomic Energy Society of Japan 7 (4), 338-349, 2008
Atomic Energy Society of Japan
- Tweet
Keywords
- primary loop recirculation pump
- purge water of mechanical seal
- thermal fatigue cracks due to temperature fluctuation
- fundamental mechanism investigation and countermeasure by scale and mock-up tests
- flow barrier with heater to prevent the temperature fluctuation
- inspection results after 10 years' operation
Details 詳細情報について
-
- CRID
- 1390282680162906496
-
- NII Article ID
- 10024631963
-
- NII Book ID
- AA11643165
-
- ISSN
- 21862931
- 13472879
-
- NDL BIB ID
- 9732440
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed