Nuclear Research Reactor TRIGA IAN-R1. Jaime Sandoval Lagos Supervisor Reactor Nuclear October 2014

Transcription

1 Nuclear Research Reactor TRIGA IAN-R1 Jaime Sandoval Lagos Supervisor Reactor Nuclear October 2014

2 INTRODUCTION The Nuclear Reactor IAN-R1 went critical on February It was run by the Instituto de Asuntos Nucleares (IAN) and operated to a power of 10kWth. Its operating power was upgraded to 30 kwth in General Atomics succesfully converted its MTR-HEU 93% U-235 into LEU 20% enriched TRIGA fuel in The Instituto Colombiano de Geología y Minería INGEOMINAS, currently Servicio Geológico Colombiano (SGC), has been in charge of the Nuclear Reactor since The Reactor had been on extended shutdown from 1998 to The Colombian Geological Survey (SGC) formed a qualified group for operation, upgraded the Reactor s Instrumentation and Control Systems, and was granted an operating licence for the next 5 consecutive years.

3 The TRIGA Nuclear Reactor IAN-R1 is a graphite reflected, water moderated, pool type reactor. It operates at 30kWth and uses 20% enriched U235 for fuel. DESCRIPTION The Reactor s Core lies inside a 16 m 3 cylindrical pool surrounded by concrete. A Plutonium-Beryllium (Pu-Be) neutron source is used to start the nuclear chain reaction.

4 Instrumentation & Controls

5 Irradiation Facilities Two Pneumatic Systems: In-core Flux: 7.8 x10 11 n/cm 2 s. Out-of-core Flux: 1 x10 9 n/cm 2 s Two Beam Ports. (Not currently in use) One Hot Cell

6 Cooling System t<40 C

7 Water Purification System Conductivity < 2 μs/cm ph [ ]

8 Physical Security Colombia is part of the Convención Protección Física de Materiales Nucleares (Ley 728 de 2001) Follow guidelines from the IAEA Perimeter Infrared System Biometric and Intercom Systems Access Control Alarms Fire Safety

9 Legal Aspects Regulating Authority: Ministerio de Minas y Energía. Resolución Nov Licence requirements for Nuclear Installations and Regulations. Resolución Dic-2002 Radiation Protection and Safety Regulations. Resolución Ene-2010 Regulations for Nuclear Waste Disposal. Actual Licence: Licencia Número IANR1 011 Expedida el 16 de septiembre de Valid for up to Five (5) Years. Reactor s Legal Documents Reporte Análisis de Seguridad (SAR). Manual de Seguridad. Manual de Funcionamiento. Manual de Protección Radiológica. Manual de Mantenimiento. Manual Plan de Emergencias. Manual de Garantía de Calidad. Manual de Protección Física. Manual de Especificaciones Técnicas.

10 International Treaties The Treaty on the Non-Proliferation of Nuclear Weapons, commonly known as the Non-Proliferation Treaty or NPT. Tlatelolco Treaty of Prohibition of Nuclear Weapons in Latin America. Safeguards (IAEA). Law 47, December Tratado de la prohibición completa de ensayos nucleares. Ley 660 del 30 de julio de COLOMBIA.

11 Nuclear Fission U-235 A + B MeV Neutron Flux Newborn neutrons scatter in all directions. Nuclear Fission IAN-R1 s Neutrón Flux: 4C= 7.8 x10 11 n/cm 2 s 3D= 6.5 x10 11 n/cm 2 s 5E= 3.6 x10 11 n/cm 2 s 4F= 3.8 x10 11 n/cm 2 s [1]

12 Multiplication Factor Average Neutrón s Lifetime 10-7 s Not all newborn neutrons cause another nuclear fission in the fuel. K eff = 1 Critical K eff > 1 Super-Critical K eff < 1 Sub-Critical K =εpfη ε = Fast fission factor η = Thermal fission factor p = Resonance escape probability f = Thermal utilization factor

13 Reactivity (ρ) It is the deviation from Critical (K eff = 1 Critical Reactor). K eff = +/- δk = K excess Relation between ρ and K eff

14 Control Rods 3 Boron Carbide (B 4 C) Control Rods. Control Rod Worth: Rod 1 $ 3.25 Rod 2 $ 2.89 Rod 3 $ 3.39 Excess Reactivity: $2.18 Shutdown Margin (Rod 3 out of core) $3.96

15 Nuclear Waste Disposal Decay Pool. Radioactive Waste Center (Deposit) U.S.A. Nuclear Fuel Repatriation.

16 Reactor Uses Potential uses: Research Neutron Radiography Neutron Diffraction Training Nuclear Physics Reactor Operation Radioisotope Production Br-82, P-32, La-140, Au-198. Sample Analysis Neutron Activation Analysis (NAA) Delayed Neutrons Thermochronology (Fission Tracks) Biological Samples

17 Bibliography 1. H. Böck, M. Villa. Physics and Kinetics Of TRIGA Reactor. Vienna University of Technology, Atomic Institute of the Austrian Universities J.A. Sarta, L.A. Castiblanco. Neutron Flux Measurement and Thermal Power Calibration of The IAN-R1 TRIGA Reactor R.M. Gomes do Prado Souza, A.Z. Mesquita, L.A. Castiblanco. Hot Commissioning Test and Technical Results of the IAN-R1 TRIGA Reactor. 3 nd WORLD TRIGA USERS CONFERENCE Belo Horizonte, MG, Brazil.2005.

18 Thank You