Research Reactor Details - JRR-3M


Country Japan
Facility Name JRR-3M
Facility Number JP-0008
Status OPERATIONAL
Last Updated 2002/08/30


General Data
Owner  JAPAN ATOMIC ENERGY RESEARCH INSTITUTE
Operator  TOKAI RESEARCH ESTABLISHMENT
Licensing  MINISTRY OF EDUCATION, CULTURE, SPORTS, SCIENCE & TECHNOLOGY
Construction Date  1985/08/02
Criticality Date  1990/03/22
Safeguards  IAEA
Initial Cost 32.5 B YEN
Annual Cost 1.8 B YEN
Total Staff 41
No of Operators 25


Technical Data
Reactor Type POOL
Thermal Power, Steady (kW) 20,000.00
Max Flux SS, Thermal (n/cm2-s) 2.7 E14
Max Flux SS, Fast (n/cm2-s) 1.4E14
Thermal Power, Pulsed (MW) 0.00
Max Flux Pulsed, Thermal (n/cm2-s)
Max Flux Pulsed, Fast (n/cm2-s)
Moderator LIGHT WATER
Coolant LIGHT WATER
Natural Convection Cooling
Forced Cooling 2400 M3/HR
Coolant Velocity in Core 5.9 M/S
Reflector BE,D2O,H2O
Reflector Number of Sides 4
Control Rods Material HF
Control Rods number 6


Experimental Facilities
Horizontal Channels 9
Horizontal Max Flux (n/cm2-s)
Horizontal Use BEAM EXPERIMENTS
Vertical Channels 17
Vertical Max Flux (n/cm2-s) 2.7E14
Vertical Use MATERIAL IRRADIATION TESTS, RADIOISOTOPES PRODUCTION
Core Irradiation Facilities 9
Core Max Flux (n/cm2-s) 2.7E14
Reflector Irradiation Facilities 8
Loops Number
Loops Max Flux
Loops use


Fuel data
Origin of Fissile Material USA
Enrichment Supplier USA
Equilibrium Core Size 26
Plates per Element 21
Dimensions of Plates 1.521X 71.0 X 770
Rods per Element
Dimensions of Rods, mm
Tubes per Element
Dimensions of Tubes, mm
Cladding Material AL ALLOY
Cladding Thickness, mm 0.38
Fuel Material U3O8ALX & U3SI2ALX
Fuel Thickness, mm 0.51
Uranium Density, g/cm3 4.8
Burnup on Discharge, max % 60
Burnup Average, % 30
Last Shipment Year
Last Receipt Year 2002
Fuel Fabricator CERCA, FRANCE


Utilization
Hours per Day  24
Days per Week  7
Weeks per Year  28
MW Days per Year  3300
Materials/fuel test experiments  Number of runs: 6
Isotope Production  192 Ir, 198Au, 196Yb, 60Co
  • Total Activity (GBq)
  •  600000
    Neutron Scattering  Neutron scattering
  • On-line beam hours
  •  926
    Neutron Radiography  On-line beam hours: 1500
    Neutron capture therapy  NO
    Activation Analysis  PGNAA, INAA
  • number of samples irradiated
  •  1500
    Transmutation  Mass of Silicon (kg) : 2354
     Mass of gemstones (kg): N/A
    Geochronology  Fission Track
  • number of samples irradiated
  •  2
    Teaching  NO
    Training  NO
    Other Uses  NO


    Operating Experience
    Reactor Thermal Power Date of Operational for
    Category Type kW Criticality Construction Years Months
     RESEARCH  POOL  20000.00  1990/03/22  1985/08/02  19  11