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Wu, H.*; Wang, Y.*; Ikeda, Atsushi; Miller, C. J.*; Waite, T. D.*
Environmental Science; Water Research & Technology, 5(8), p.1400 - 1411, 2019/08
Times Cited Count：7 Percentile：33.28(Engineering, Environmental)In this study, the distributions of iron and phosphorus species in a 1.25 m
pilot scale submerged membrane bioreactor dosed with Fe(II) salts to either the membrane chamber or the 1st anoxic chamber were determined using X-ray absorption spectroscopy (XAS) at the iron and phosphorus K-edges. Significant differences in the distribution of Fe species were evident at the commencement of dosing depending on the chamber to which Fe(II) was dosed though these differences were much less distinct by the time steady state conditions were achieved. Both the co-precipitation of P with Fe and adsorption of phosphorus to iron oxides play important roles with regard to the removal of phosphorus from the MBR supernatant with the results of this work suggesting that P removal via formation of Fe(III)-phosphate mineral species is preferred if Fe(II) is dosed to the membrane chamber rather than the 1st anoxic chamber.
Shinohara, Kunihiko; Takeishi, Minoru; ; ; Mizutani, Tomoko
JNC TN8440 2001-019, 141 Pages, 2001/11
JNC-TN8440-2001-019.pdf:12.69MB
This report was written about the effluent control in JNC Tokai Works from 1
April 2000 to 31 March 2001. In this period, the quantities and concentrations of retroactivities in liquid waste from Tokai Works were under the discharge limits of "Safety Regulations for the Tokai Reprocessing Plant", "Safety Regulations for the Tokai Reprocessing Plant" and regulations of government.
Maruo, Yoshihiro; ; ;
JNC TN8440 2001-001, 135 Pages, 2000/12
JNC-TN8440-2001-001.pdf:4.61MB
None
March, 2000); Shinohara, Kunihiko; ; ; ; Isozaki, Tokuju; ; *
JNC TN8440 2000-003, 93 Pages, 2000/08
The investigation on the radioactivity concentration for gross beta, H and 
Cs in seawater collected around the discharge point had been performed in order to grasp the change of the activity level of the coastal seawater offshore the JNC Tokai Works from the low level liquid effluent of the reprocessing plant. After the investigation on the radioactivity in seawater during the hot examination, the detailed investigation on the environmental effects from the liquid effluent of JNC reprocessing plant has been performed since July 1978 on the basis of the request from Ibaraki prefecture as the full-scale operation of the reprocessing plant. Consequently, no increase of the radioactive concentration due to the discharged effluent has been observed. And also, as the result of the consideration to the investigation on the environmental effect from the liquid effluent throughout 22 years since 1978, no change of the radioactive concentration level in seawater was recognized.
Arai, Hidehiko
Hoshasen Riyo Ni Okeru Saikin No Shimpo, p.183 - 192, 2000/06
no abstracts in English
Kawai, Katsuo
Hokeikyo Nyusu, (25), p.2 - 6, 2000/03
no abstracts in English
Takachi, Kazuhiko; Suzuki, Hideaki*
JNC TN8400 99-041, 76 Pages, 1999/11
The buffer material is expected to maintain its low water permeability, self-sealing properties, radionuclides adsorption and retardation properties, thermal conductivity, chemical buffering properties, overpack supporting properties, stress buffering properties, etc. over a long period of time. Natural clay is mentioned as a material that can relatively satisfy above. Among the kinds of natural clay, bentonite when compacted is superior because (1)it has exceptionally low water permeability and properties to control the movement of water in buffer, (2)it fills void spaces in the buffer and fractures in the host rock as it swells upon water uptake, (3)it has the ability to exchange cations and to adsorb cationic radioelements. In order to confirm these functions for the purpose of safety assessment, it is necessary to evaluate buffer properties through laboratory tests and engineering-scale tests, and to make assessments based on the ranges in the data obtained. This report describes the procedures, test conditions, results and examinations on the buffer material of unconfined compression tests, one-dimensional consolidation tests, consolidated-undrained triaxial compression tests and consolidated-undrained triaxial creep tests that aim at getting hold of static mechanical properties. We can get hold of the relationship between the dry density and tensile stress etc. by Brazillian tests, between the dry density and unconfined compressive strength etc. by unconfined compression tests, between the consolidation stress and void ratio etc. by one-dimensional consolidation tests, the stress pass of each effective confining pressure etc. by consolidated-undrained triaxial compression tests and the axial strain rate with time of each axial stress etc. by consolidated-undrained triaxial creep tests.
; ; Isozaki, Tokuju; ; ; *
PNC TN8440 97-037, 501 Pages, 1997/10
None
Sugihara, Yoichiro*; Mukai, Katsuyuki*; Nunomiya, Ichiro*
PNC TJ6357 97-001, 40 Pages, 1997/03
None
S concentration in primary cooling water by LSCSato, Koichi;
Hoken Butsuri, 31(2), p.230 - 233, 1996/00
no abstracts in English
; ; ; ; ; ;
PNC TN8520 93-003, 410 Pages, 1994/01
This manual includes the standard procedures for analysis of radioactive materials and chemical polluants in liquid and gaseous waste elluent discharged into the environment from the nuclear facilities of Tokai Works of PNC. The third edition, PNC N852-84-06 was published in 1984. Almost all analytical procedures have been modified and new technique has been used for nine years, so the forth edition revised entirely was to be published this time. And most of analytical procedures will be revised with the point of improving of reliabiliy.
