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Okazaki, Hiro; Shibano, Koya; Abe, Katsuo; Sumi, Mika; Kayano, Masashi; Kageyama, Tomio; Mason, P.*
Proceedings of INMM 57th Annual Meeting (Internet), 7 Pages, 2016/07
The reference materials used for accountancy analysis by IDMS, referred to as LSD spikes allows to obtain accurate measurement results for a variety of nuclear materials under potentially difficult handling or measurement conditions. Because of expected difficulties in a stably long term supply of plutonium reference materials, which are the main source of plutonium for LSD spikes preparation, the JAEA's PFDC decided to evaluate the possibility of using domestically available MOX powders as a plutonium source material for LSD spikes. Therefore, PFDC started to separate, purify and characterize plutonium in MOX powders for plutonium reference materials (MOX-Pu) preparation that are suitable for source of LSD spikes in cooperation with the US DOE's NBL. The detailed preparation procedure of the latest MOX-Pu standard material and results of intercomparison for verification are presented.
Sumi, Mika; Kageyama, Tomio; Suzuki, Toru
Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Dai-27-Kai Nenji Taikai Rombunshu (CD-ROM), 7 Pages, 2006/00
All accountancy analysis at the PFDC of JAEA is performed by isotope dilution mass spectrometry with well-characterized standard materials. Though Pu reference materials has been supplied from foreign country, importing those Pu is gradually becoming more difficult and may be almost impossible to import them in future. Thus, in order to establish the capability and expertise for the preparation of Pu reference materials, JAEA has started collaborative work with NBL who has high skills for preparing and supplying nuclear reference materials for long periods. One of the targets of this collaboration is preparation of standard material for IDMS. MOX powder which has been stored in JAEA was dissolved and purified to obtain Pu solution. A small portion of the purified solution was transported to NBL for analysis. LSD spike will be prepared from this Pu solution and then validation analysis and performance test including stability test will be performed with NBL and JAEA.
Sumi, Mika; Kageyama, Tomio; Suzuki, Toru
no journal, ,
All accountancy analysis at the Plutonium Fuel Development Center of JAEA is performed by isotope dilution mass spectrometry (IDMS) with well-characterized standard materials. Though Pu reference materials has been supplied from foreign country, importing those Pu materials is gradually becoming more difficult. Thus, in order to establish the capability for the preparation of Pu reference materials, JAEA has started collaborative work with New Brunswick Laboratory (NBL) who has high skills for preparing and supplying nuclear reference materials for long periods. One of the targets of this collaboration is preparation of standard material for IDMS which called LSD spike. MOX powder which has been stored in JAEA was dissolved and purified to obtain Pu solution. A small portion of the purified solution was transported to NBL for analysis. LSD spike will be prepared from this Pu solution and then validation analysis and performance test including stability test will be performed.
Sumi, Mika; Suzuki, Toru; Kageyama, Tomio; Mason, P.*; Neuhoff, J.*
no journal, ,
JAEA, with the technical assistance of New Brunswick Laboratory, is developing the capability to produce a small quantity of plutonium material of suitable purity and composition to serve as the basis for standard material of isotope dilution mass spectrometry which called LSD spike. The starting material consists of a mixed oxide of plutonium and uranium (MOX). The MOX material was dissolved and subjected to a series of purification steps to remove as much uranium as possible. The purified plutonium solution was sampled and analyzed for both uranium and plutonium isotopics and elemental concentrations via isotope dilution mass spectrometry using the total evaporation method on thermal ionization mass spectrometers. This report describes the evaluation of the measurement data, performed at JAEA and summarizes the results of the detailed uncertainty analyses performed for each data set at NBL. The detailed uncertainty analyses are performed based on GUM.
Sumi, Mika; Abe, Katsuo; Kageyama, Tomio; Mason, P.*
no journal, ,
In order to obtain reliable accountancy analysis results, IDMS is applied at most of the Pu handling facilities in Japan. Reference materials, referred to as LSD spikes were developed to allow facilities, regulatory and safeguards organizations to accurately measure nuclear materials. Because of expected difficulties in the long term supply of Pu reference materials, which are the main source for LSD spike preparation, the JAEA decided to evaluate the possibility of using domestically available MOX as a Pu source material. JAEA-PFDC started to produce and certify Pu reference materials that are suitable for use in producing LSD spikes in collaboration with the US DOE-NBL. From the MOX-Pu characterized in 2008, two types of the LSD spikes were prepared and distributed for verification. The detailed purification procedure, results of the intercomparison of LSD spikes and interim intercomparison of the MOX-Pu prepared in 2012 will be presented.
Mason, P.*; Sumi, Mika; Kageyama, Tomio; Suzuki, Toru; Holland, M. K.*; Cordaro, J.*
no journal, ,
In the early 2000's it had become clear that Japanese fuel cycle facilities would require plutonium RMs needed to perform a large number of accountancy measurements beyond the capacity of the producers. Additionally, the increasing difficulty in producing plutonium CRMs would further limit the amount of imported plutonium RMs available for safeguards. In order to help address the issue, in 2003 the US DOE's NNSA and JAEA began a cooperation to develop Japanese capabilities for plutonium RM production. Under this auspices, the DOE's NBL and JAEA's PFDC began efforts to establish plutonium RM production capability. In 2013 the DOE's SRNL established a similar cooperative agreement with JAEA's TRP to develop and maintain expertise in plutonium coulometry. This paper will discuss the development and status of these efforts and others.