本レポートは国立研究開発法人日本原子力研究開発機構が不定期に発行する成果報告書です本レポートの入手並びに著作権利用に関するお問い合わせは下記あてにお問い合わせ下さいなお本レポートの全文は日本原子力研究開発機構ホームページ ( より発信されています

Size: px

Start display at page:

Download "本レポートは国立研究開発法人日本原子力研究開発機構が不定期に発行する成果報告書です本レポートの入手並びに著作権利用に関するお問い合わせは下記あてにお問い合わせ下さいなお本レポートの全文は日本原子力研究開発機構ホームページ ( より発信されています"

ひろとかわらい
5 years ago
Views:

1 JAEA-Data/Code DOI: /jaea-data-code JENDL Decay Data File 2015 Jun-ichi KATAKURA and Futoshi MINATO Nuclear Science and Engineering Center Sector of Nuclear Science Research March 2016 Japan Atomic Energy Agency 日本原子力研究開発機構

2 本レポートは国立研究開発法人日本原子力研究開発機構が不定期に発行する成果報告書です本レポートの入手並びに著作権利用に関するお問い合わせは下記あてにお問い合わせ下さいなお本レポートの全文は日本原子力研究開発機構ホームページ ( より発信されています国立研究開発法人日本原子力研究開発機構研究連携成果展開部研究成果管理課茨城県那珂郡東海村大字白方 2 番地 4 電話 , Fax , ird-support@jaea.go.jp This report is issued irregularly by Japan Atomic Energy Agency. Inquiries about availability and/or copyright of this report should be addressed to Institutional Repository Section, Intellectual Resources Management and R&D Collaboration Department, Japan Atomic Energy Agency. 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki-ken Japan Tel , Fax , ird-support@jaea.go.jp Japan Atomic Energy Agency, 2016

3 JENDL Decay Data File 2015 Jun-ichi KATAKURA and Futoshi MINATO Nuclear Science and Engineering Center Sector of Nuclear Science Research Japan Atomic Energy Agency Tokai-mura, Naka-gun, Ibaraki-ken (Received December 18, 2015) JENDL Decay Data File 2015 (JENDL/DDF-2015) has been produced. The decay data of nuclides with mass numbers from 1 to 260 are included. The nuclides with unknown gamma- and/or beta-emission are also included in order to keep decay chains. The data of 1,284 fission product nuclides with mass from 66 to 172 remain unchanged from JENDL/FPD-2011 except several corrections which had been claimed by users, and those of the newly added 1,953 nuclides are taken from ENSDF. Finally, the decay data of 3,237 nuclides including 244 stable nuclides were compiled as JENDL/DDF-2015 file. Keywords: JENDL, Decay Data, Half-life, Branching Ratio, Q Value Nagaoka University of Technology i

4 JENDL 2015 ( ) JENDL 2015 JENDL/DDF ,284 JENDL/FPD ,953 ENSDF 244 3,237 JENDL/DDF-2015 : ii

5 Contents 1 Introduction Data sources Processing decay data Summary Acknowlegdement References Appendix: List of included nuclides iii

6 This is a blank page.

7 1 Introduction JENDL FP Decay Data File 2011 (JENDL/FPD-2011) 1) was released in It covers fission products (FPs) with masses from 66 to 172. The decay data of the file can be used for calculating the generation and depletion of FPs in a reactor. As most of the FP nuclides are short-lived and β-unstable, they decay to more stable nuclides and emit γ- and β-rays during the decay process. The emitted radiations then become the sources of decay heat of spent fuels. The data of the file have been used for the decay heat analyses. They have been also applied to the aggregate β- and γ-ray spectrum calculations. The results have showed good agreement with the measured data for major fissionable nuclides and it has been confirmed that the data of the file could be used for these kinds of calculations. The radioactive nuclides produced in a nuclear reactor are, however, not limited to only FP nuclides. There are many other radioactive nuclides including trans-uranium elements and activation products. Those radioactive nuclides play an important role for many application fields such as reprocessing spent fuels, disposal of high level radioactive waste, decommissioning nuclear facilities and so on. Then the decay data file including other radioactive nuclides than FPs is required for applying those decay data to various kinds of nuclear application fields. The decay data of nuclides from A=1 to A=260 were compiled as JENDL Decay Data File 2015 (JENDL/DDF- 2015). The present report describes the compilation of the JENDL/DDF-2015 file. 2 Data sources As the decay data of fission products have already compiled as JENDL/FPD-2011 file and they have been successfully applied to decay heat analyses, they were adopted for the JENDL/DDF-2015 file. However, some data of the JENDL/FPD-2011 file were claimed to be incorrect after the release of the file. For an example, the most strong gamma-ray of 144 Pr decay, kev- gamma-ray, is not included because of some mis-processing original decay data. These incorrect data in the JENDL/FPD-2011 file were corrected and the corrected data were incorporated into the JENDL/DDF-2015 file. The ENSDF (Evaluated Nuclear Structure and Decay Data File) file 2) is an internationally recognized evaluated data file of nuclear structure and decay data. It contains recommended decay data sets based on experimentally measured decay data. The recent decay data of the ENSDF file were adopted for JENDL/DDF-2015 when they are available excepting the data of fission products. In the compilation, it was intended that the links of decay chains were not broken until stable nuclides. The decay data of the ENSDF file, however, do not always give full decay data. Most of short-lived nuclides suffer from data incompleteness, that is, enough spectral data are not given for them. It then happens that such short-lived nuclides have only the half-lives, decay types and branching ratios with their Q values. The JENDL/DDF-2015 file includes such data without spectral data. When these data were not available in the ENSDF file, measured data and/or other data bases were consulted. The Q values were taken from the recent 2012 evaluation of M. Wang et al. 3) The Q values of FP nuclides from JENDL/FPD-2011 which were the 2009 evaluation of G. Audi et al. were also changed

8 3 Processing decay data The ENSDF file includes nuclear structure and decay data of each nuclide. The file consists of a collection of data sets. The data sets of a given nuclide include the information of the evaluated results of a single type of experiment, that is, a radioactive decay or a nuclear reaction. In the compilation of the JENDL Decay Data File, the decay data sets were retrieved from the ENSDF file and converted to the data of JENDL/DDF The conversion of the data from ENSDF to JENDL/DDF-2015 was performed using RADLST code 4) provided by BNL. As the main concern of the ENSDF file is the nuclear structure, the decay data sets are arranged for each daughter nuclides. When there are two more decay modes, the corresponding daughter nuclides are different and the data sets we are interested in are belonged to those of all the daughter nuclide. The data sets belonging to different daughter nuclides have to be merged to produce the data for the JENDL file. For example 132 Cs has two decay mode, that is, β decay and EC/β + decay. The decay data of β decay are included in 132 Ba nuclide data sets in the ENSDF file. However, those of EC/β + decay belong to the data sets of 132 Xe nuclide. The two data sets have to be merged to produce the 132 Cs decay data of JENDL/DDF When isomers exist, another problem of treating the ENSDF decay data sets occurs. As an example, the ENSDF decay data set of 137 Cs beta decay is shown here. 137BA 137CS B- DECAY 1983BE18,1996BI23,1997WAZZ07NDS BA H TYP=ERR$AUT=J. Tuli$DAT=10-Feb-2008$COM=fixed logft values$ 137BA H TYP=ERR$AUT=J. Tuli$DAT=17-Dec-2007$COM=fixed typos noted by PNPI$ 137BA H TYP=FUL$AUT=E. BROWNE, J. K. TULI$CIT=NDS 108,2173 (2007)$ 137BA2 H CUT=1-Oct-2006$ 137BA C Measured: E(B-) (1983Be18,1978Ch22,1968Wo02,1966Hs02,1958Yo01), 137BA2C shape of the B spectra (1983Be18,1978Ch22,1978Gr09,1969Sc23,1966Hs02), 137BA3C longitudinal polarization of B (1975Do14), internal bremsstrahlung 137BA4C (1977We04,1975Ba20) 137BA C 1996Bi23, 1997WaZZ: measured 283G, HPGe 137BA CG 1997WaZZ, 1996Bi23 looked for but did not find a transition 137BA2CG from the 661 level to the level. 137BA CG 2007NI04: Measured 137BA2CG EKC(127.5 KEV E3 in 134CS)/EKC(661.7 KEV M4 in 137CS)= BA CG 2007YA02: Measured K X-ray ratios obtained in decay vs 137BA2CG photo-ionization. Values agreed with previous measurements and theory. 137BA3CG Other: 2006Ha36 137BA CL J Adopted values 137CS P 0.0 7/ Y BA N BA PN 3 137BA L 0.0 3/2+ 137BA B BAS B EAV= BA CB E from 1966Hs02, (1958Yo01), (1983Be18) 137BA CB IB$from 100-IB(661 level). 137BA2CB Others: (1983Be18), (1968Wo02), (1969Ha05), 137BA3CB (1966Hs02), (1958Yo01) 137BA CB Shape: DJ=2(no) (1966Hs02,1969Sc23,1978Gr09) 137BA L /2+ 137BA B U 137BA CB IB$from IG. 2007SE05 have recomputed logf2ut= , IB=8.7E-4 20, 137BA2CB superseding their earlier value of 13.5 (2006SEZY) 137BAS B EAV= BA G E BA CG E,RI$EG from 1997Wa37, %IG average of 5.3E-4 14 (1996Bi23), 137BA2CG 6.1E-4 10 (1997Wa37) - 2 -

9 137BA L / M 1 M 137BA CL T$from adopted levels 137BA B U 137BAS B EAV= BA CB E from 1983Be18. Others: (1978Ch22), 137BA2CB (1968Wo02), (1966Hs02), (1958Yo01) 137BA CB IB$from IG. Others: (1968Wo02), (1966Hs02), BAxCB (1958Yo01). IB=94.6, LOGF1UT=8.5 (2006SEZY) 137BA CB 137BA CB Shape: DJ=2(yes)-1U (1983Be18,1978Gr09,1969Sc23,1966Hs02) 137BA G M BAS G KC= $LC= $MC= $NC+= BAS G NC= $OC= $PC=7.21E BA CG E$from 1995HeZZ 137BA CG RI$recommended by 1991BaZS on the basis of following values: 137BA2CG (1983Be18), (1978Gr09), (1978MeZM), BA2CG (1975Go28), (1973LeZJ), (1969Ha05) 137BA CG Mult.,CC: see 137BA IT DECAY The 662 kev level of 137 Ba has the half-life of minutes and is treated as an isomeric state in the JENDL/DDF file. So the gamma-ray of 662 kev emitted from this level should belong to the 137m Ba decay, not to the 137 Cs decay as the nuclide of 137m Ba is treated as a different nuclide from 137 Ba. The isomer of 137m Ba is also treated as another decay data set in the ENSDF file. The data set of 137m Ba is shown here. 137BA 137BA IT DECAY (2.552 M) 07NDS BA H TYP=FUL$AUT=E. BROWNE, J. K. TULI$CIT=NDS 108,2173 (2007)$ 137BA2 H CUT=1-Oct-2006$ 137BA C Measured: G, CE, double-decay processes 137BA CL J Adopted values 137BA P / M 1 137BA N BA PN 3 137BA L 0.0 3/2+ STABLE 137BA L / M 1 M1 137BA G M BAB G BM4W= BAS G K/T= $L/T= $M/T= $N+/T= BAS G N/T= $O/T= $P/T=6.49E BA CG E$from 1995HeZZ 137BA CG CC$evaluated by 1991BaZS based on the following values: 137BA2CG (1983Be18), (1975Go28), (1973LeZJ), 137BA3CG (1969Ha05), (1965Me03) 137BA CG $EKC= (1992NE04). Also EKC: from 1992Ne04 given as 137BA2CG weighted mean of 137BA2CG EKC= (1973LeZJ), (1973Wi10), 137BA3CG (1965Me03). Others: EKC= (1983Be18), 137BA4CG (1978Ch22), (1969Ha05) 137BA CG M K:L1:L2:L3= :151 4:22 1:19 1 (1962Ge09), K/L= , 137BA2CG L1:L2:L3=341 10:100:50 3 (1967Ka24) 137BA CG RI$from TI/(1+CC) 137BA CG Double-decay processes: see 1971Lj02, 1971Lj01, 1971Po04, 137BAxCG 1969Lj01. Probability ratio of two-ce(k)/one-ce(k)=8e-5 4 (1999VI15) When we treat both data sets differently, the 662 kev gamma-ray would be double counted. So the gammaray of 662 kev from the 662 kev level has to be removed from the 137 Cs β decay when the both data sets are treated with the RADLST code. When the isomers are processed, similar treatment is indispensable for making decay data file. However, the treatment of removing gamma-rays from the isomer levels causes another problem for using the RADLST code. The energy balance is not kept when gamma rays are removed from the data sets. When the energy balance is not kept, RADLST code stops the processing. So some modification was needed to treat the decay through a meta stable state

10 Basically the meta stable states with half-lives longer than 0.1 s are treated as other nuclides than the ground state. However, the excited states with decay branchings to change Z number are included as meta stable states even if the half-lives are shorter than 0.1 s. The number of the meta stable states in the JENDL/DDF-2015 file is limited to at most 2 for each isotope. When the compilation of JENDL Decay Data File was started, the MAT number of each nuclide was intended to coincide with that attached to the nuclide in the general purpose file. The MAT numbers attached to the nuclides of the general purpose file allow at most 2 isomeric states for each isotope. Although it was finally decided that the MAT number of the JENDL/DDF file was uniquely adopted, the number of the meta stable states remained to be 2 for a isotope. 4 Summary JENDL/DDF-2015 was produced and released in November The file contains the decay data of 3237 nuclides from neutron to 260 Lr. The data of FP region were adopted from the JENDL/FPD-2011 file with necessary modification because of the reported deficiency of some nuclides. Excepting FP nuclides, the decay data were compiled based on the ENSDF file. Even if there is no enough data, the half-lives, the Q values and branching ratios were contained in the compiled file in order to keep the decay chains. It would be better to compensate the deficit decay data by theoretical calculation. Such a work would be necessary in future to keep the consistency of the file. In any case, the compiled decay data seem to cover the number of nuclides which are required in the nuclear application fields for the moment. However, it is true that the data included in the file are not completed due to the deficit of some data, e.g. spectra. It will be needed to make the file more complete and reliable. Such a development is left for future work. Acknowledgement The authors are grateful to the members of Nuclide Generation Evaluation Working Group of Japanese Nuclear Data Committee and the members of Nuclear Data Center, JAEA, for the continuous support and encouragement to the present work. References 1) J. Katakura, JENDL FP Decay Data File 2011 and Fission Yields Data File 2011, JAEA-Data/Code , (2012), 73p. 2) M.R. Bhat, Evaluated Nuclear Structure Data File (ENSDF), Proc. of International Conference on Nuclear Data for Science and Technology, Springer-Verlag, Berlin, Germany (1992). 3) M. Wang, G. Audi, A.H. Wapstra, F.G. Kondev, M. MacCormick, X. Xu, and B. Pfeiffer, Chin. Phys. C, 36(12), pp (2012). 4) T.W. Burrows, The Program RADLST, BNL-NSC (1988); NNDC, 5) T.R. England, Private Communication. 6) M. Herman, A. Trkov (Eds.), ENDF-6 Formats Manual, BNL , (2009), 389p

11 Appendix: List of included nuclides The number of nuclides included in the JENDL/DDF-2015 file is 3237 from neutron to 260 Lr. Summary of the number of included nuclides are listed in Table 4.1. The discrete beta spectra means here that the beta transitions to the levels of daughter nuclide are given with maximum energy of beta ray and its transition intensity. And the conversion electrons are included as the discrete beta spectra when they are available. The continuous gamma and beta spectra are those of theoretically estimated ones which are adopted for FP nuclides with short half-lives and no measured spectral data. They are also included in JENDL/FPD Excepting FP nuclides, no theoretically estimated decay data are included. Recently the half-lives of double beta decay have been reported. Even if the reported values are lower limits, the half-lives are included in the decay data file. Table 4.1 Number of nuclides of various types No. of Nuclides Data Types 3237 Total number of contained nuclides 244 Stable nuclides 2993 Unstable nuclides or states 650 Isomeric states 58 Second isomeric states 2431 Gamma spectra 2012 Discrete gamma spectra 509 Continuous gamma spectra 1265 Beta spectra 842 Discrete beta spectra 486 Continuous beta spectra 988 Positron or EC spectra 567 Alpha spectra - 5 -

12 The following pages show the tables of the included decay data for each nuclide. The table was produced by the ENDF decay data processing code SPEC5 5) developed by T.R. England. The meanings of the column heading of the list are shown below. The SPEC5 code is also used to check the consistency of the decay data included. Col. Heading No. Symbol S ZZAAAS Halflife E-beta, E-gamma, E-alpha RTYP Quantity Serial number of included nuclide Chemical symbol preceded by the Z value and followed by the atomic number. Neutron is expressed by nn here in order to distinguish from N (Nytrogen). The isomeric state number (0 - ground state, 1 = 1st isomeric state, 2 = 2nd isomeric state). Numeric identifier consisting of the quantity Z A 10 + S, where S is the isomeric state number. Total decay half-life in seconds. Average beta, gamma and alpha decay energies. E-beta is the total electronrelated radiation such as β, β +, conversion electron, Auger etc. E-gamma is the average energy of all electromagnetic radiation such as gamma rays, X rays, and annihilation radiation. E-alpha is the average energy of all heavy particles and delayed neutrons. Initial or primary decay mode for the listed line of data. See ENDF-6 manual 6). RFS Daughter state following the decay (0 = ground state, 1 = 1st isomeric state, 2 = 2nd isomeric state). Q Branching AWR NDK NSP MAT Total Q value for the decay mode. Fraction of decays from type RTYP to state RFS. Atomic weight ratio, meaning the ratio of the atomic mass to the mass of a neutron. Number of decay mode. Number of spectral types. Material identification number - 6 -

13 1 0-nn E E E E E E E H stable E H stable E H E E E E E E E He stable E He stable E He E E E E E E E Li stable E Li stable E Be E E E E E E E He E E E E E E E E E Li E E E E E E E B E E E E E E E Li E E E E E E E E E Be stable E B E E E E E E E C E E E E E E E E E Be E E E E E E E B stable E C E E E E E E E Li E E E E E E E E E Be E E E E E E E E E B stable E C E E E E E E E Be E E E E E E E B E E E E E E E C stable E N E E E E E E E B E E E E E E E C stable E N E E E E E E E O E E E E E E E B E E E E E E E C E E E E E E E N stable E O E E E E E E E C E E E E E E E N stable E O E E E E E E E C E E E E E E E E E N E E E E E E E E E O stable E C E E E E E E E E E

14 44 7- N E E E E E E E E E O stable E F E E E E E E E Ne E E E E E E E C E E E E E E E E E N E E E E E E E E E E E O stable E F E E E E E E E Ne E E E E E E E N E E E E E E E O E E E E E E E F stable E Ne E E E E E E E O E E E E E E E F E E E E E E E Ne stable E Na E E E E E E E Mg E E E E E E E N E E E E E E E E E O E E E E E E E F E E E E E E E Ne stable E Na E E E E E E E Mg E E E E E E E E E C E E E E E E E E E E E N E E E E E E E E E E E O E E E E E E E E E F E E E E E E E Ne stable E Na E E E E E E E Mg E E E E E E E Al E E E E E E E E E O E E E E E E E F E E E E E E E Ne E E E E E E E Na stable E Mg E E E E E E E O E E E E E E E E E

15 82 9- F E E E E E E E Ne E E E E E E E Na E E E E E E E Na E E E E E E E E E Mg stable E Al E E E E E E E Al E E E E E E E E E F E E E E E E E E E Ne E E E E E E E Na E E E E E E E Mg stable E Al E E E E E E E Si E E E E E E E E E F E E E E E E E Ne E E E E E E E Na E E E E E E E Mg stable E Al E E E E E E E Al E E E E E E E Si E E E E E E E E E Ne E E E E E E E Na E E E E E E E E E Mg E E E E E E E Al stable E Si E E E E E E E P E E E E E E E E E Ne E E E E E E E E E Na E E E E E E E Mg E E E E E E E Al E E E E E E E Si stable E P E E E E E E E E E S E E E E E E E E E Ne E E E E E E E E E E E Na E E E E E E E E E Mg E E E E E E E Al E E E E E E E

16 Si stable E P E E E E E E E S E E E E E E E E E Ne E E E E E E E E E E E Na E E E E E E E E E E E Mg E E E E E E E Al E E E E E E E Si stable E P E E E E E E E S E E E E E E E Na E E E E E E E E E E E Mg E E E E E E E Al E E E E E E E Si E E E E E E E P stable E S E E E E E E E Cl E E E E E E E E E Ar E E E E E E E E E Na E E E E E E E E E E E Mg E E E E E E E E E Al E E E E E E E Si E E E E E E E P E E E E E E E S stable E Cl E E E E E E E E E E E Ar E E E E E E E E E Na E E E E E E E E E E E Mg E E E E E E E E E Al E E E E E E E E E Si E E E E E E E P E E E E E E E

17 S stable E Cl E E E E E E E Ar E E E E E E E E E Al E E E E E E E E E Si E E E E E E E P E E E E E E E S stable E Cl E E E E E E E Cl E E E E E E E E E Ar E E E E E E E Si E E E E E E E P E E E E E E E S E E E E E E E Cl stable E Ar E E E E E E E K E E E E E E E E E E E Si E E E E E E E E E P E E E E E E E S stable E Cl E E E E E E E E E Ar stable E K E E E E E E E E E E E Ca E E E E E E E E E S E E E E E E E Cl stable E Ar E E E E E E E K E E E E E E E Ca E E E E E E E E E P E E E E E E E E E S E E E E E E E Cl E E E E E E E Cl E E E E E E E Ar stable E K E E E E E E E K E E E E E E E Ca E E E E E E E E E S E E E E E E E

18 Cl E E E E E E E Ar E E E E E E E K stable E Ca E E E E E E E P E E E E E E E E E S E E E E E E E Cl E E E E E E E Ar stable E K E E E E E E E E E Ca stable E Sc E E E E E E E E E E E Ti E E E E E E E E E Ar E E E E E E E K stable E Ca E E E E E E E Sc E E E E E E E Ti E E E E E E E S E E E E E E E Cl E E E E E E E Ar E E E E E E E K E E E E E E E Ca stable E Sc E E E E E E E Sc E E E E E E E Ti E E E E E E E Cl E E E E E E E Ar E E E E E E E K E E E E E E E Ca stable E Sc E E E E E E E Ti E E E E E E E Ar E E E E E E E K E E E E E E E Ca stable E Sc E E E E E E E Sc E E E E E E E E E Ti E E E E E E E V E E E E E E E V E E E E E E E Cl E E E E E E E E E Ar E E E E E E E K E E E E E E E Ca E E E E E E E

19 Sc stable E Sc E E E E E E E Ti E E E E E E E E E V E E E E E E E Ar E E E E E E E K E E E E E E E Ca stable E Sc E E E E E E E Sc E E E E E E E Ti stable E V E E E E E E E V E E E E E E E Cr E E E E E E E Ar E E E E E E E K E E E E E E E Ca E E E E E E E Sc E E E E E E E Ti stable E V E E E E E E E Cr E E E E E E E K E E E E E E E Ca E E E E E E E E E Sc E E E E E E E Ti stable E V E E E E E E E Cr E E E E E E E Mn E E E E E E E E E K E E E E E E E E E Ca E E E E E E E Sc E E E E E E E Ti stable E V E E E E E E E Cr E E E E E E E Mn E E E E E E E K E E E E E E E E E Ca E E E E E E E E E Sc E E E E E E E Sc E E E E E E E E E Ti stable E V E E E E E E E E E Cr E E E E E E E Mn E E E E E E E

20 Mn E E E E E E E Fe E E E E E E E Ca E E E E E E E Sc E E E E E E E Ti E E E E E E E V stable E Cr E E E E E E E Mn E E E E E E E Fe E E E E E E E Ca E E E E E E E Sc E E E E E E E Ti E E E E E E E V E E E E E E E Cr stable E Mn E E E E E E E Mn E E E E E E E E E Fe E E E E E E E Fe E E E E E E E Co E E E E E E E Ti E E E E E E E V E E E E E E E Cr stable E Mn E E E E E E E Fe E E E E E E E Fe E E E E E E E Co E E E E E E E Co E E E E E E E E E Sc E E E E E E E Ti E E E E E E E V E E E E E E E Cr stable E Mn E E E E E E E E E Fe stable E Co E E E E E E E Co E E E E E E E Ti E E E E E E E V E E E E E E E Cr E E E E E E E Mn stable E Fe E E E E E E E Co E E E E E E E Ni E E E E E E E Cr E E E E E E E Mn E E E E E E E Fe stable E Co E E E E E E E Ni E E E E E E E

すべて見る

Tec032(ⅰ-25E).pwd

Tec032(ⅰ-25E).pwd 本レポートは独立行政法人日本原子力研究開発機構が不定期に発行する成果報告書です本レポートの入手並びに著作権利用に関するお問い合わせは下記あてにお問い合わせ下さいなお本レポートの全文は日本原子力研究開発機構ホームページ (http://www.jaea.go.jp) より発信されています独立行政法人日本原子力研究開発機構研究技術情報部研究技術情報課 319-1195 茨城県那珂郡東海村白方白根