• Title/Summary/Keyword: Sipping technology

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SIPPING TEST: CHECKING FOR FAILURE OF FUEL ELEMENTS AT THE OPAL REACTOR

  • Smith, Michael Leslie;Bignell, Lindsey Jorden;Alexiev, Dimitri;Mo, Li
    • Nuclear Engineering and Technology
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    • v.42 no.1
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    • pp.125-130
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    • 2010
  • Sipping measurements were implemented at the Open Pool Australian Light water reactor (OPAL) to test for failure in reactor fuel elements. Fission product released by the fuel element into the pool water was measured using both High Purity Germanium (HPGe) detection via samples and a NaI(Tl) detection in-situ with the sipping device. Results from two fuel elements are presented.

Sipping Test Technology for Leak Detection of Fission Products from Spent Nuclear Fuel (사용후핵연료 핵분열생성물 누출탐상 Sipping 검사기술)

  • Shin, Jung Cheol;Yang, Jong Dae;Sung, Un Hak;Ryu, Sung Woo;Park, Young Woo
    • Transactions of the Korean Society of Pressure Vessels and Piping
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    • v.16 no.2
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    • pp.18-24
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    • 2020
  • When a damage occurs in the nuclear fuel burning in the reactor, fission products that should be in the nuclear fuel rod are released into the reactor coolant. In this case, sipping test, a series of non-destructive inspection methods, are used to find leakage in nuclear fuel assemblies during the power plant overhaul period. In addition, the sipping test is also used to check the integrity of the spent fuel for moving to an intermediate dry storage, which is carried out as the first step of nuclear decommissioning, . In this paper, the principle and characteristics of the sipping test are described. The structure of the sipping inspection equipment is largely divided into a suction device that collects fissile material emitted from a damaged assembly and an analysis device that analyzes their nuclides. In order to make good use of the sipping technology, the radioactive level behavior of the primary system coolant and major damage mechanisms in the event of nuclear fuel damage are also introduced. This will be a reference for selecting an appropriate sipping method when dismantling a nuclear power plant in the future.

CURRENT STATUS OF INTEGRITY ASSESSMENT BY SIPPING SYSTEM OF SPENT FUEL BUNDLES IRRADIATED IN CANDU REACTOR

  • Park, Jong-Youl;Shim, Moon-Soo;Lee, Jong-Hyeon
    • Nuclear Engineering and Technology
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    • v.46 no.6
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    • pp.875-882
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    • 2014
  • In terms of safety and the efficient management of spent fuel storage, detecting failed fuel is one of the most important tasks in a CANada Deuterium Uranium (CANDU) reactor operation. It has been successfully demonstrated that in a CANDU reactor, on-power failed fuel detection and location systems, along with alarm area gamma monitors, can detect and locate defective and suspect fuel bundles before discharging them from the reactor to the spent fuel storage bay. In the reception bay, however, only visual inspection has been used to identify suspect bundles. Gaseous fission product and delayed neutron monitoring systems cannot precisely distinguish failed fuel elements from each fuel bundle. This study reports the use of a sipping system in a CANDU reactor for the integrity assessment of spent fuel bundles. The integrity assessment of spent fuel bundles using this sipping system has shown promise as a nondestructive test for detecting a defective fuel bundle in a CANDU reactor.

Analysis of the Trend for SIP based Internet Telephony Service on IETF (SIP기반 인터넷 텔레포니 서비스를 위한 IETF 동향 분석)

  • 박선옥;허미영;강신각
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2002.11a
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    • pp.331-334
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    • 2002
  • According as internet service diffusion is popularized by internet user's increase, internet telehpony technology is becoming main issue of Internet Service Providers. Standardization issue about technologies related VoIP is discussed keeping in step on market's fast change and request in IETF. Specially, Standardizaiton is working through discussion on MMUSIC WG, SIP WG, SIPPING WG about SIP that is proposed by the alternative of ITU-T's H.323. Therefore in this Paper, introduce SIP standard that is established through several reconsideration revision works, and examine about IETF's trend for SIP based internet telephony service.

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Development of CANDU Spent Fuel Bundle Inspection System and Technology (중수로 사용후연료 건전성 검사장비 개발)

  • Kim, Yong-Chan;Lee, Jong-Hyeon;Song, Tae-Han
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.11 no.1
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    • pp.31-39
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    • 2013
  • Nuclear fuel can be damaged under unexpected circumstances in a nuclear reactor. Fuel rod failure can be occurred due to debris fretting or excessive hydriding or PCI (Pellet-to-clad Interaction) etc. It is important to identify the causes of such failed fuel rods for the safe operation of nuclear power plants. If a fuel rod failure occurs during the operation of a nuclear power plant, the coolant water is contaminated by leaked fission products, and in some case the power level of the plant may be lowered or the operation stopped. In addition, all spent fuels must be transferred to a dry storage. But failed fuel can not be transferred to a dry storage. Therefore, the purpose of this study is to develop a system which is capable of inspecting whether the spent fuel in the storage pool is failed or not. The sipping technology is to analyze the leakage of fission products in state of gas and liquid. The failed fuel inspection system with gamma analyzer has successfully demonstrated that the system is enough to find the failed fuel at Wolsong plant.