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VAEC 2007 Science and technics publishing house Vietnam atomic energy commission The annualAnnual report report for 2007 Editorial board: Porf. Vuong Huu Tan, Chief Editor Dr. Le Van Hong Mr. Nguyen Hoang Anh Ms. Dang Thi Hong Mr. Nguyen Trong Trang Hanoi, 11 - 2008 The VAEC Annual Report for 2007 has been prepared as an account of works carried out at VAEC for the period 2007. Many results presented in the report have been obtained in collaboration with scientists from national and overseas universities and research institutions. The ANNUAL REPORT for 2007 Edited by Vietnam Atomic Energy Commission 59 Ly Thuong Kiet, Hanoi Vietnam Chairman: Prof. Dr Vuong Huu Tan Tel: +84-4-39422756 Fax: +84-4-39424133 This report is available from: Training and Information Division Dept. of Planning and R&D Management Vietnam Atomic Energy Commission 59 Ly Thuong Kiet, Hanoi,Vietnam Tel: +84-4-39423591 Fax: +84-4-39424133 E-mail: [email protected] [email protected] Contents Preface 11 1. CONTRIBUTIONS 13 1.1 - NUCLEAR PHYSICS 15 Study on Neutron Capture Cross Sections Using The Filtered Neutron Beams of 55keV 17 and 144keV at The Dalat Reactor and Related Applications. Vuong Huu Tan, Nguyen Canh Hai, Pham Ngoc Son and Tran Tuan Anh On The Phase Transition in Stable Quark Matter. 27 Tran Huu Phat, Nguyen Tuan Anh, Nguyen Van Long and Le Viet Hoa. Development of a Method for Measurement of Total Neutron Cross Sections Based on 33 The Neutron Transmission Method Using a He-3 Counter on Filtered Neutron Beams at Dalat Research Reactor. Tran Tuan Anh, Dang Lanh, Nguyen Canh Hai, Nguyen Xuan Hai, Pham Kien, Nguyen Thuy Nham, Pham Ngoc Son and Ho Huu Thang. Microscopic Study of Elastic and Inelastic Alpha-Nucleus Scattering at Medium 38 Energies. Dao Tien Khoa, Hoang Si Than, Do Cong Cuong, Ngo Van Luyen, Nguyen Ngoc Quynh and Nguyen Tuan Anh. 1.2 - REACTOR PHYSICS, REACTORS AND NUCLEAR POWER 43 Conceptual Nuclear Design of Two Models of Research Reactor Proposed for 45 Vietnam. Nguyen Nhi Dien, Huynh Ton Nghiem, Le Vinh Vinh and Vo Doan Hai Dang. Evaluations of Physical Parameters of Heu and Leu Fuel Assemblies Used in Dalat 55 Nuclear Research Reactor Using MVP Code. Le Dai Dien and Hoang Minh Giang. Investigation of The Thermal Hydraulics Safety Characteristic Parameters on The 59 Dalat Research Reactor as Inserting Additional Fresh Fuel Assemblies with High Enriched Uranium or Fuel Assemblies with Low Enriched Uranium. Luu Anh Tuan, Tran Van Hien and Hoang Duc Huynh.. 1.3 - INSTRUMENTATION 67 Experimental Evaluation of Systematic Errors of Gamma Spectrometer for Assay of 69 Radioactive Waste Drums. Tran Quoc Dung, Nguyen Duc Thanh, Luu Anh Tuyen, Lo Thai Son and Phan Dinh Phuc. Develop The Spectrometer Systems to Measure Gamma Cascade, Nuclear Data and 75 Other Applications on The Neutron Beam. Vuong Huu Tan, Pham Dinh Khang, Nguyen Xuan Hai, Pham Ngoc Son, Tran Tuan Anh, Ho Huu Thang, Nguyen Canh Hai, Pham Ngoc Tuan and Nguyen Thi Thuy Nham. Study of Beam Dynamics in Cyclotron. 81 Nguyen Tien Dung, Trinh Dinh Truong, Nguyen Manh Hung, Pham Dinh Khang and Others. 5 Standardization of Irradiation Values at The Radiation Calibration Laboratory. 85 Pham Van Dung, Hoang Van Nguyen, Phan Van Toan, Phan Dinh Sinh, Tran Thi Tuyet and Do Thi Phuong. Design and Construction of The 8K Multi-Channel Gamma Spectrometer Module 88 (AMPLIFIER+ADC+MCD). Truong Van Dat, Hoang Thi Ngoc Bich, Pham Ngoc Tuan, Dang Lanh, Tuong Thi Thu Huong and Vu Xuan Cach. Design and Construct an Interface Card for Spectroscopy of Amplitude of Coincident 93 Pulses. Nguyen Xuan Hai, Pham Ngoc Tuan, Pham Dinh Khang, Vu Xuan Cach, Ho Huu Thang, Tran Tuan Anh, Hoang Thi Ngoc Bich, Nguyen Canh Hai, Nguyen Thi Thuy Nham, Tuong Thi Thu Huong, Pham Ngoc Son and Pham Duy Tung. Design and Construction of The Ethanol-Chlorobenzene Dosimetry System Using 97 Oscillometric Method. Nguyen Duc Hoa, Tran Khac An, Huynh Dong Phuong, Bui Phi Khanh, Chau Le Ha, et al. Improvement of Quality of Radiation Indicator Used for Food Irradiation in Dose 103 Range of 3-10 kGy Hoang Hoa Mai, Pham Duy Duong and Nguyen Dinh Duong. Thyroid Uptake Measurement System. 107 Nguyen Duc Tuan, Nguyen Thi Bao My and Nguyen Van Sy. 1.4 - INDUSTRIAL APPLICATIONS 113 Establishment of Tracer Technologies in Gas Phase. 115 Nguyen Huu Quang, Bui Quang Tri, Huynh Thai Kim Ngan, Dang Nguyen The Duy, Tran Tri Hai, Pham Hoang Ha, To Ba Cuong, Bui Trong Duy and Phan Thanh Khoa. Building of Training Program of Non-Destructive Testing for Concrete Structures 125 (Part 1: Radiographic Testing; Ultrasonic Pulse Velocity Measurement;nuclear Moisture-density Gauge). Nguyen Le Son, Phan Chanh Vu, Pham The Hung and Vu Huy Thuc. 1.5 - ECOLOGY, ENVIRONMENT AND GEOLOGY 129 Study of Isotopic Technical Application to Estimate Origin of Nitrogen Composision 131 of Groundwater in Hanoi Area. Trinh Van Giap, Dinh Bich Lieu, Dang Anh Minh, Vo Thi Anh, Bui Dac Dung, Nguyen Thi Hong Thinh, Nguyen Manh Hung, Nguyen Van Hoan and Nguyen Van Hai. Biodegradation of Organ Chlorine Pesticides in Contaminated Soil Collected from Yen 135 Tap, Cam Khe, Phu Tho. Nguyen Thuy Binh, Nguyen Van Toan, Pham Thi Thai and Dinh Thi Thu Hang. Studying on The Contaminative Determination of Existing Forms of As3+, As5+, Sb3+ 140 and Sb5+ in Ground Water at Lamdong Province. Nguyen Giang, Nguyen Thanh Tam, Truong Phuong Mai, Ho Tran The Huu and Nguyen Van Minh. Combined Use of Cs-137 and Be-7 to Assess The Effectiveness of Soil Conservation 146 for Vetiver Grass Strips in Coffee Crop Lands in The Central Highlands. Phan Son Hai, Nguyen Dao, Tran Van Hoa, Tran Dinh Khoa, Nguyen Thi Mui and Trinh Cong Tu. 6 Determination of 22 Elements in Marine Environmental Samples in Special Areas at 152 The South of Vietnam. Nguyen Ngoc Tuan, Nguyen Giang, Nguyen Thanh Tam and Truong Phuong Mai. 1.6 - BIOLOGY, AGRICULTURE AND MEDICINE 161 Study on The Procedures for Determining of Pesticide Residues in Green Vegetables. 163 Le Tat Mua, Nguyen Tien Ẹat, Nguyen Van Minh, Nguyen Ngoc Tuan, Le Thi Ngoc Trinh, Ta Thi Tuyet Nhung, Truong Van Tai, Tran Thanh Nha and Nguyen Thi Hong Tham. Study on The Application of Nutrient Immobilized Hydrogel as a Substrate for 176 Hydroponics Culture. Vo Thi Thu Ha, Le Quang Luan, Nguyen Thi Nu, Nguyen Thi Vang, Phan Dinh Thai Son and Nguyen Quang Khanh. Study on Procedure for Determination of Cr, As, Se, Cd, Hg, Pb in Some Kinds of 183 Herb Products Such as: Kind of Fungus, Philamin... by ICP-MS”. Pham Ngoc Khai, Do Van Thuan, Nguyen Thi Kim Dung and Nguyen Hong Minh. Study on Application of Molecular Techniques (RAPD–PCR and RAMP-PCR) to 189 Detect Mutation in Rice Breeding. Hoang Thi My Linh, Phan D. T. Son, N. T.vang, Nguyen T. T. Hien and Le Xuan Tham. 1.7 - RADIATION PROTECTION AND RADIOACTIVE WASTE 197 MANAGEMENT Study on Technology for Radioactive Waste Treatment and Management from 199 Uranium Production. Vu Hung Trieu, Vu Thanh Quang, Nguyen Duc Thanh, Trinh Giang Huong, Tran Van Hoa, Hoang Minh Chau, Ngo Van Tuyen, Nguyen Hoang Lan and Vuong Huu Anh. Study of Exposure Dose in Some Serious Hypothesis Accidents of SVST-CO60/B 207 Irradiator for Planning Accident Responses. Tran Van Hung, Tran Khac An, Cao Van Chun and Nguyen Anh Tuan. 1.8 - RADIATION TECHNOLOGY 213 Study on The Synthesis of Colloidal Silver Nanoparticles by γ-Irradiation for Using as 215 An Antimicrobial Substance. Dang Van Phu, Bui Duy Du, Nguyen Trieu, Vo Thi Kim Lang, Doan Thi The and Nguyen Quoc Hien. Study of Gamma Radiation Effect on Natural Polymer of Extracted Peat 221 HUMIC/HUMATE to Apply in Agriculture. Le Huu Tu, Le Hai, Nguyen Tan Man, Tran Thi Tam, Tran Thu Hong, Pham Thi Sam, Nguyen Tuong Ly Lan and Le Van Toan. 1.9 - RADIOCHEMISTRY AND MATERIALS SCIENCE 225 Study on Preparing Porous Hydroxyapatite Ceramic for Born Replacement in Animal. 227 Do Ngoc Lien, Nguyen Duc Kim, Dang Ngoc Thang, Cao Phuong Anh, Tran Thi Thanh Hien, Trinh Binh, Ngo Duy Thin and Luu Dinh Mui. Processing Pa Lua Uranium Ore by Mixing and Curing with Sulfuric Acid on a Scale 231 of 500 Kg/Batch to Recover Yellowcake. Le Quang Thai, Cao Hung Thai, Le Thi Kim Dung, Phung Vu Phong, Tran Van Son, 7 Doan Thi Mo, Hoang Bich Ngoc, Nguyen Hong Ha, Vu Khac Tuan, Vu Hung Trieu, Tran Van Hoa, Nguyen Duy Phap, Doan Thanh Son and Pham Quang Minh. Study on Precipitation of Amoni Diuranate - (NH4)3U2O7 from UO2F2- HF Solution for 240 Fuel Ceramic UO2 Powder Preparation. Dang Ngoc Thang, Pham Danh Khanh, Ha Dinh Khai, Nguyen Van Doan, Tran Thi Hong Thai and Pham Hung Vuong. Study on The Synthesis of Disida Derivatives for Labeling with 99mTc. 243 Pham Ngoc Dien, Duong Van Dong, Nguyen Thi Thu, Bui Van Cuong, Mai Phuoc Tho and Vo Cam Hoa. Designing, Making Apparatus and Study on Technology of Forming Ceramics by 250 Extrusion Method. Dao Truong Giang, Nguyen Duc Kim, Ngo Quang Hien, Cao Phuong Anh and Ha Dinh Khai. Study on Technology for Manufacturing Alloy (Lead – Tin – Bismuth – Cadmium) 253 Having Low Melting Temperature (≤ 800C) Used to Shield Radioactive Rays for Treating Cancer. Ngo Xuan Hung, Pham Duc Thai, Nguyen The Khanh, Vu Quang Chat, Nguyen Huu Quyet Research on The Recovery of Neodymium and Iron from NdFeB Permanent Magnet 260 Scraps. Hoang Nhuan, Tran Ngoc Ha, Nguyen Thuc Phuong, Hoang Van Duc and Nguyen Thi Thanh Thuy.