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Journal Articles

Evaluation of change of LSD spikes by long-term storage

Shibano, Koya; Abe, Katsuo; Tsukasa, Kazuo*; Hosogane, Tatsuya; Kayano, Masashi; Sumi, Mika; Fujiwara, Hideki*; Yamaguchi, Kazuya*; Motoki, Chika*

Dai-41-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2020/11

Large-sized dried spikes, called LSD spike, are used as reference material for accountancy analysis for Plutonium and Uranium by Isotope Dilution Mass Spectrometry. LSD spikes preparation is performed each steps as followed (1) Preparing Plutonium and Uranium mix solution, (2) Aliquoting mix solution to vials, and (3) Drying. J-MOX have planned prepared in-house LSD spike and utilized it for accountancy analysis. If LSD spikes are stored for long term, dried material peel off from bottom of vial and it may affect analytical results. In this study, LSD spikes, which have composition suitable for accountancy analysis in J-MOX, had been stored for about 2 years, then long-term stability of LSD spikes had been evaluated.

Journal Articles

Development of Pu standard material preparation and characterization technique in Japan

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.

Journal Articles

Approaches to the ISO/IEC 17025 accreditation for Pu and U accountancy analysis

Okazaki, Hiro; Sumi, Mika; Abe, Katsuo; Sato, Mitsuhiro; Kageyama, Tomio

Kaku Busshitsu Kanri Gakkai (INMM) Nippon Shibu Dai-34-Kai Nenji Taikai Rombunshu (Internet), 9 Pages, 2013/10

The quality control section of Plutonium Fuel Development Center (PFDC) has been analyzing isotopic compositions by Mass Spectrometry as well as content by Isotope Dilution Mass Spectrometry (IDMS) of plutonium and uranium in nuclear materials. Along with establishing and managing the quality assurance system, ensuring the reliability of the analysis data is important. PFDC has been establishing the quality management system with ISO 9001. We addressed technical improvement to improve further reliability of analysis quality, and accredited for ISO/IEC 17025 in March 2010. While ISO 9001 consists of management requirements for quality system of organizations, ISO/IEC 17025 consists of technical requirements for the competence of testing and calibration laboratories in addition to the management requirements. In this presentation, we report our approaches to have accreditation and operation status for isotopic compositions and content of plutonium and uranium in nuclear materials.

Journal Articles

ISO/IEC 17025 accreditation for accountancy analysis at PFDC

Okazaki, Hiro; Sumi, Mika; Abe, Katsuo; Kageyama, Tomio; Nakazawa, Hiroaki

Proceedings of INMM 53rd Annual Meeting (CD-ROM), 9 Pages, 2012/07

Accurate and precise measurement of Pu and U is critically important for safeguards and is the premise of safeguards inspection by IAEA at Nuclear Fuel handling facilities. Quality control section of Plutonium Fuel Development Center (PFDC-lab) has been analyzing the Pu and U isotopic compositions by MS as well as its content by IDMS of the MOX fuel pellet and its source materials for the accountancy purposes. To maintain and improve analysis quality and analysis reliability, PFDC-lab decided to have accreditation of ISO/IEC 17025 (International standard for the General requirements for the competence of testing and calibration laboratories). PFDC-lab established analysis quality management system, acquired the knowledge and information of uncertainty evaluation under cooperative study with US DOE's NBL, ensured our analysis traceability and validates our methods to meet technical requirements. In conclusion, we have accredited for ISO/IEC 17025 in March 1st, 2010.

Journal Articles

Quality control and uncertainty evaluation for accountancy analysis at PFDC-JAEA

Sumi, Mika; Okazaki, Hiro; Abe, Katsuo; Kageyama, Tomio; Nakazawa, Hiroaki

Proceedings of INMM 53rd Annual Meeting (CD-ROM), 9 Pages, 2012/07

PFDC has been developing various technologies for MOX fuel production, and Pu and U isotopic composition and content of these samples are analyzed at PFDC-lab. For the analysis of MOX fuel material including raw material powders, PFDC-lab is accredited as the testing laboratory of ISO/IEC 17025 scoped for (1) Pu and U isotopic composition measurement in the nuclear fuel materials by MS and (2) Pu and U content measurement in the nuclear fuel materials by IDMS. This accreditation was granted in March 2010. While preparing for accreditation, the PFDC-lab established the capability to estimate measurement uncertainty in accordance with the GUM Guide and developed calculation program combining GUM-Workbench and Excel. This paper presents details of our quality control system and measurement uncertainty evaluation systems.

Journal Articles

Verification of LSD spikes prepared in Japan from a MOX source material

Sumi, Mika; Abe, Katsuo; Kageyama, Tomio; Nakazawa, Hiroaki; Kurosawa, Akira; Yamamoto, Masahiko; Mason, P.*; Neuhoff, J.*; Doubek, N.*; Balsley, S.*; et al.

Proceedings of INMM 51st Annual Meeting (CD-ROM), 9 Pages, 2010/07

Large Size Dried (LSD) spikes are currently used in many facilities in Japan (and around the world) for U and Pu accountancy analysis by Isotope Dilution Mass Spectrometry (IDMS). Because of the large quantity of plutonium standard materials are needed to support Japanese facilities for nuclear fuel cycle and expected difficulties in the long term supply and transport of Pu reference materials, JAEA decided to evaluate the possibility of using MOX stored at Plutonium Fuel Development Center (PFDC) as a source of Pu standard material for LSD spike preparation. At PFDC, Pu nitrate solution was prepared from MOX and two types of the LSD spikes were prepared. The samples of each spike were distributed for verification measurements to international and domestic laboratories. Details of the Pu make-up value evaluation, the LSD spike preparation and the evaluation of the verification results will be presented.

Journal Articles

Experience on preparation of LSD spikes for MOX samples

Sumi, Mika; Abe, Katsuo; Kageyama, Tomio; Nakazawa, Hiroaki; Kacchi, Tomokazu*; Murakami, Yoshiki*; Hishi, Tomoyuki*; Ai, Hironobu*

Proceedings of INMM 50th Annual Meeting (CD-ROM), 9 Pages, 2009/07

Currently, many laboratories who measure Pu and U concentration by isotope dilution mass spectrometry (IDMS) use Large Size Dried (LSD) spikes, which contain both Pu and U in individual vials. Plutonium Fuel Development Center (PFDC) prepared LSD spikes for MOX samples and has been used while LSD spikes prepared at inspection laboratories and commercially supplied are mainly aimed to measure input solution for reprocessing. Difficulties of importing reference materials are increasing though the needs of Pu reference materials are increasing. Stable securing Pu reference material is essential for facility operation and it is considered to be important to acquire technique to prepare domestic Pu reference material. Pu were prepared from MOX powder at PFDC and used for LSD spike preparation. Practical tests were performed with JNFL. Experience of preparation and utilization of LSD spike for MOX, consideration of certification method for MOX-Pu will be explained also in this paper.

JAEA Reports

JASPAS JC-11(A556); Non-destructive Assay for Uranium and Plutonium in Reprocessing Input Solutions -Hybrid K-edge/XRF Densitometer- (JASPAS JC-11 Final)

Surugaya, Naoki; Abe, Katsuo; Kurosawa, A.; Ikeda, H.; Kuno, Yusuke

PNC-TN8410 97-211, 156 Pages, 1997/05

PNC-TN8410-97-211.pdf:4.1MB

As a part of JASPAS programme, a non-radioactive assay system for the accountability of uranium and plutonium in input dissolver solutions of a spent fuel reprocessing plant, called Hybrid K-edge/XRF Densitometer, has been developed at the Tokai Reprocessing plant (TRP) since 1991. The instrument is the one of the hybrid type combined K-edge densitometry (KED) and X-ray fluorescence (XRF) analysis. The KED is used to determine the uranium concentration and the XRF is used to determine the U/Pu ratio. These results give the plutonium concentration in consequence. It is considered that the instrument has the capability of timely on-site verification for input accountancy. The instrument had been installed in the analytical hot cell at the TRP and the experiments comparing with Isotope Dilution Mass Spectrometry (IDMS) method have been carried out. As the results of measurements for the actual input solutions in the acceptance and performance tests, it was typically confirmed that the precision for determining uranium concentration by the KED was within 0.2%, whereas the XRF for Plutonium performed within 0.7%. This final report summarizes the design information and performance data so as to end the JASPAS programme.

JAEA Reports

Summary of facility and operating experience on Heliu Engineering Demonstration Loop, HENDEL

; Fujisaki, Katsuo; ; ; Ota, Yukimaru; Watanabe, Shuji; Kobayashi, Hideki*;

JAERI-Tech 96-030, 244 Pages, 1996/07

JAERI-Tech-96-030.pdf:7.65MB

no abstracts in English

JAEA Reports

None

Kurosawa, A.; Abe, Katsuo; Kaminaga, Kazuhiro; Kuno, Yusuke; ;

PNC-TN8410 93-031, 191 Pages, 1993/03

PNC-TN8410-93-031.pdf:3.91MB

So far, samples have been taken by both Japan Government and the International Atomic Energy Agency (IAEA) from the feed accounting tank of the Reprocessing Plant. Upon transporting the samples, one A-type transport container per batch sample has been required. To simplify the transport of samples, the resin bead technique requiring the trace amounts of samples (several mg for uranium and for plutonium) has been developed with the Oak Ridge National Laboratory, USA being the center. This technique was introduced into the Power Reactor and Nuclear Fuel Development Corporation (PNC) as part of the TASTEX project, and then has been incorporated into the JASPAS project as one of the joint researches between the PNC and the IAEA, in which the PNC has played a leading role. Up to now, joint experiments have been performed seven times, and the resin bead technique may have reached a certain technical level with a few technical problems. In these joint experiments, the PNC prepared and transported samples, whereas the IAEA analysed them. In addition, the PNC has investigated the resin bead technique independently. As mentioned above, the most outstanding merit of the resin bead technique lies in the simplified transport of samples. The technique is also provided with another merit by which uranium and plutonium can be measured without separating them from each other, leading to the necessity of research and development of it on the part of the Reprocessing Plant. This paper describes the results of investigation on the measurement technique of uranium and plutonium by means of the resin bead technique, together with the results from the 3rd to 7th PNC-IAEA joint experiments.

Journal Articles

Further improvement of richman's densitometer

Abe, Katsuo; ; ; Kuno, Yusuke;

IAEA Symposium on International Security Measure, 0 Pages, 1993/00

None

Journal Articles

None

; Abe, Katsuo; ; Kuno, Yusuke; Masui, Jinichi

1994 IAEA Symposium on International Safeguards, , 

None

Journal Articles

None

; Abe, Katsuo; ; Kuno, Yusuke; Masui, Jinichi

Dai-15-Kai Hosho Sochi To Kaku Busshitsu Kanri Shimpojiumu, , 

None

Journal Articles

None

Surugaya, Naoki; Abe, Katsuo; ; ; Kuno, Yusuke;

INMM, , 

None

Journal Articles

None

; Abe, Katsuo; ; ; Kuno, Yusuke

INMM Annual Meeing, , 

None

Journal Articles

None

Surugaya, Naoki; Abe, Katsuo; ; ; ; Kuno, Yusuke

INMM Annual Meeing, , 

None

Oral presentation

Preparation and evaluation of reference materials (LSD spikes), 2; Evaluation

Sumi, Mika; Takamatsu, Mai*; Ebisawa, Noriyuki; Abe, Katsuo; Kageyama, Tomio; Chiba, Masahiko; Nakazawa, Hiroaki; Suzuki, Toru; Kacchi, Tomokazu*; Kushigeta, Yoshiyuki*; et al.

no journal, , 

Standard material which called Large Size Dried (LSD) spikes is required for Plutonium and Uranium measurement by Isotope Dilution Mass Spectrometry (IDMS). Collaboration work between JAEA and JNFL is performed to validate efficient use of standard material (primary) and to evaluate the effectivity of the Pu which separated and purified from MOX stored at JAEA. According to the presentation "Preparation and evaluation of reference materials (LSD spikes) (1) Preparation and testing", uncertainty of the actual sample measurements at Rokkasho Reprocessing plant are evaluated with GUM. Also, the effectivity of the half sized LSD spikes from generally used at JAEA and LSD spikes which prepared from Pu purified from MOX at JAEA are statistically evaluated and validated.

Oral presentation

Preparation and evaluation of reference materials (LSD spikes), 1; Preparation and testing

Kacchi, Tomokazu*; Kushigeta, Yoshiyuki*; Murakami, Yoshiki*; Hishi, Tomoyuki*; Ai, Hironobu*; Takamatsu, Mai*; Ebisawa, Noriyuki; Sumi, Mika; Abe, Katsuo; Kageyama, Tomio; et al.

no journal, , 

Standard material which called Large Size Dried (LSD) spikes is required for Plutonium and Uranium measurement by Isotope Dilution Mass Spectrometry (IDMS). Collaboration work between JAEA and JNFL is performed to validate efficient use of standard material (primary) and to evaluate the effectivity of the Pu which separated and purified from MOX stored at JAEA. Preparation of the LSD spikes at JAEA and evaluation with actual samples with remote operation systems at JNFL will be presented.

Oral presentation

Preparation and evaluation of reference materials for accountancy analysis, 1; Preparation and evaluation method

Sumi, Mika; Abe, Katsuo; Kageyama, Tomio; Nakazawa, Hiroaki; Takamatsu, Mai*; Kacchi, Tomokazu*; Murakami, Yoshiki*; Ai, Hironobu*

no journal, , 

Isotope dilution mass spectrometry method used for the accountancy analysis at nuclear fuel facilities requires the standard materials called LSD(Large Size Dried) spike. Generally, LSD spikes are prepared from certified reference materials which supplied from foreign countries. However, the difficulty of Pu reference material importation is increasing. It is important for safeguard to attain and continue highly reliable accountancy analysis and stable securing of LSD spike is essential. Therefore, under collaboration work between JAEA and JNFL, several types of LSD spike were prepared. Measurement experiments with actual samples were performed and those results were compared with the results obtained using LSD spike which supplied from foreign laboratory. This report presents preparation of LSD spikes, determination of value of plutonium which separated and purified from MOX and used as raw material, practical test and evaluation method of uncertainty based on ISO-GUM.

Oral presentation

Preparation and evaluation of reference materials for accountancy analysis, 2; Evaluation results

Sumi, Mika; Abe, Katsuo; Kageyama, Tomio; Nakazawa, Hiroaki; Takamatsu, Mai*; Kacchi, Tomokazu*; Murakami, Yoshiki*; Ai, Hironobu*

no journal, , 

Destructive analysis for accountancy at nuclear fuel facilities should attain international target values for measurement uncertainties in safeguarding nuclear materials (ITVs).Since measurement uncertainties of isotope dilution mass spectrometry depend on uncertainties of standard materials (spikes) used, utilizing highly reliable standard material is essential. The LSD spikes prepared under collaboration work with JAEA and JNFL has different Pu/U ratio and smaller nuclear material in a spike compared with the LSD spikes used at safeguard laboratories, and the value of Pu which separated and purified from MOX and used as raw material for one of the LSD spike prepared at JAEA were measured at JAEA. Uncertainties of the prepared LSD spikes and the measurement results of actual samples with these LSD spikes were evaluated based on ISO-GUM and compared with ITVs.

24 (Records 1-20 displayed on this page)