Development of whole energy absorption spectrometer for decay heat measurement on fusion reactor materials Maekawa, Fujio; Ikeda, Yujiro [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment] 70 PLASMA PHYSICS AND FUSION; THERMONUCLEAR REACTOR MATERIALS; AFTER-HEAT; SPECTROMETERS; BGO DETECTORS; MEASURING METHODS; ENERGY ABSORPTION; SPECIFICATIONS; BENCH-SCALE EXPERIMENTS; NEUTRON SOURCE FACILITIES; STAINLESS STEEL-316; COPPER; VANADIUM; TITANIUM; NIOBIUM; MOLYBDENUM To measure decay heat on fusion reactor materials irradiated by D-T neutrons, a Whole Energy Absorption Spectrometer (WEAS) consisting of a pair of large BGO (bismuth-germanate) scintillators was developed. Feasibility of decay heat measurement with WEAS for various materials and for a wide range of half-lives (seconds - years) was demonstrated by experiments at FNS. Features of WEAS, such as high sensitivity, radioactivity identification, and reasonably low experimental uncertainty of {approx} 10 %, were found. (author) Japan Atomic Energy Research Inst., Tokyo (Japan) OSTI as DE97758662 Japan 1997-03-01 English Conference Conference: 1996 symposium on nuclear data, Tokai (Japan), 21-22 Nov 1996; Other Information: PBD: Mar 1997; Related Information: Is Part Of Proceedings of the 1996 symposium on nuclear data; Iguchi, Tetsuo [Nagoya Univ. (Japan)]; Fukahori, Tokio [eds.]; PB: 332 p. Medium: X; Size: pp. 182-187 https://doi.org/ ON: DE97758662 [] JAERI-Conf-97-005; CONF-9611184-; INDC(JPN)-179/U Other: ON: DE97758662; TRN: JP9709103 JPN; SCA: 700480; PA: JPN-97:009103; EDB-98:026952; SN: 97001867007 2008-02-05 580334 https://www.osti.gov/etdeweb/servlets/purl/580334