Los Alamos National Laboratory Support for Domestic 99 Mo Production - - PowerPoint PPT Presentation

▶
los alamos national laboratory support for domestic 99 mo
SMART_READER_LITE
LIVE PREVIEW

Los Alamos National Laboratory Support for Domestic 99 Mo Production - - PowerPoint PPT Presentation

Dec 20, 2023 116 likes •325 views

Los Alamos National Laboratory Support for Domestic 99 Mo Production Gregory E. Dale 2017 99 Mo Topical Meeting Montreal, Quebec, Canada September 13, 2017 Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

slide-1
SLIDE 1

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

Los Alamos National Laboratory Support for Domestic 99Mo Production

2017 99Mo Topical Meeting Montreal, Quebec, Canada September 13, 2017

Gregory E. Dale

slide-2
SLIDE 2

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

LANL Support for Domestic 99Mo Production

  • As part of the NNSA Material Management and

Minimization (M3) Program, LANL is supporting:

– Shine Medical Technologies with the

production of fission product 99Mo from a DT accelerator driven subcritical uranium salt solution.

– NorthStar Medical Radioisotopes with the

electron accelerator production of 99Mo from

100Mo(γ,n)99Mo.

slide-3
SLIDE 3

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

SHINE Medical Technologies Production Overview

SHINE Medical Technologies will produce fission product 99Mo in a subcritical accelerator driven low enriched uranium salt solution. In FY17 LANL has been supporting SHINE in the development of coupled thermal hydraulics and neutron transport modeling.

slide-4
SLIDE 4

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

Coupled Neutron Transport/ CFD Modeling

D-T neutron production MCNP neutron transport for fission rate (power and gas generation profiles) CFD Model for flow velocity, temperature (density) and void profile

slide-5
SLIDE 5

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

Coupled Modeling Iteration Loop

1 2 3 4 5 1 2 3 4 5 6 7

System power [KW] Iterative coupled calculation loop #

1 2 3 4 5 10 20 30 40 50 60 70 80

Operating Temperature [C] Iterative coupled calculation loop #

MCNP

(Energy deposition)

M-CFD

(Temp. Void profile) (updated density)

Steady state system condition analysis

slide-6
SLIDE 6

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

Coupled Modeling Results

slide-7
SLIDE 7

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

Supo “Super-Power” Thermal Modeling

  • 45 kW water boiler reactor

– Uranyl-nitrate solution – Operated from 1951 to 1974 – Used for neutron research – Contained water-cooled spiral coils to maintain desired operating temperatures

  • Multiphase steady state CFD

simulations using ANSYS Fluent

– 2-D axisymmetric model – Modeled natural convective heat transfer of solution

  • Assumed laminar flow

– Gaussian power deposition profile – Radiolytic gas bubble generation (H2+02) proportional to power deposition

  • Rising bubbles enhance fluid motion

and heat transfer

slide-8
SLIDE 8

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

SUPO Modeling Results

500 1000 1500 2000 2500 3000 3500 4000 4500 5000 0.5 1 1.5 2 2.5 3 3.5 Free-Conv HTC [W/m2-K] Power Density [kW/L] Group A Experiment Group B Experiment Group C Experiment Bunker Experiment Group A Simulation Group B Simulation Group C Simulation Bunker Simulation

  • Simulation vs. past experiment data
  • Heat Transfer Coefficient (HTC)

– Under predicted HTC of highest power by 40% – Over predicted HTC of lowest power by 479%

  • Avg. Solution Temperature

– Over predicted temp. at highest power by 8.6°C – Under predicted temp. at lowest power by 25.4°C

  • Future Work

– Assume turbulent flow at high powers – Assume laminar flow at low powers – Remove radiolytic bubbles at low powers Steady state temperature profile

  • f 3.05 kW/L (40

kW) reactor Max temp. = 96.18°C

slide-9
SLIDE 9

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

NorthStar Electron Accelerator Production

  • The NorthStar process uses an

electron accelerator to create a high flux of bremsstrahlung photons in enriched 100Mo targets to create 99Mo through the photonuclear reaction

100Mo(γ,n)99Mo.

–

Reaction threshold is 9 MeV.

–

Peak cross section is 150 mb at 14.5 MeV.

  • We are exploring electron beams

in the 35-42 MeV range. Average bremsstrahlung photon spectra produced with 20, 35, and 42 MeV electron beams in a Mo target compared to the photonuclear cross section of 100Mo.

10 20 30 40 0.5 1 1.5 2 2.5 flux (1011γ/cm2/s/µA) energy (MeV) 50 100 150 cross section (mb)

20 MeV 35 MeV 42 MeV

σ(γ,n)

slide-10
SLIDE 10

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

29 mm Target System for Testing at ANL

A larger diameter target will be needed for production at the beam powers being considered. The new target design also varies the target disk thickness, which creates a more even power profile through the length of the target.

100 200 300 400 500 600 W 1 2 3 4 5 6 7 8 9 10 Peak Temperature, K Front Window and Target Disks

Peak Window and Target Disk Temperature: 35 MeV @ 285 psi Inlet (ṁ = 0.116 kg/s)

slide-11
SLIDE 11

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

LANL 29 mm Diameter Mo Target for Testing at ANL

Target Side View Beam Target window Components inside vacuum Helium cooling lines Lead Shielding

slide-12
SLIDE 12

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

29 mm Target Installed at ANL

slide-13
SLIDE 13

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

29 mm Target

Target consisting of 29 mm diameter disks with 0.5 mm cooling gaps. Five disks are 1 mm thick, three are 1.5 mm thick, and two are 2 mm thick. Coolant View Beam View 29 mm Targets before irradiation

slide-14
SLIDE 14

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

29 mm Target with Lead Shielding

Thermal test performed

  • n August 18.

Results currently being analyzed.

slide-15
SLIDE 15

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

Resistively Heated Target Experiments

Thermocouple wires Heater wires Heaters (7) Each of the 7 heaters can generate ~ 1 kW and has an embedded thermocouple. Each heater is 2.5 mm thick. There is a 0.7 mm cooling gap between heaters.

slide-16
SLIDE 16

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

Resistively Heated Target Testing

  • n the Helium Flow Loop
  • The resistively heated

target will be installed for testing on the prototype helium flow loop at LANL.

  • We are also continuing our

long duration flow tests on this system, having recently started our third 7-week continuous run test this FY.

Resistively heated target

slide-17
SLIDE 17

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

OTR/IR Coupon Testing

  • Test the performance of coated and uncoated

Inconel mock windows in beam with our Optical Transition Radiation (OTR) and Infrared (IR) diagnostics.

Uncoated Inconel mock window Inconel mock window coated with very high temperature (VHT) thermal paint.

slide-18
SLIDE 18

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

Mock Window Testing Results at 35 MeV

OTR IR Uncoated Coated Remaining work:

  • In-situ IR

Calibration

  • Longevity studies
  • n the coating.
slide-19
SLIDE 19

Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA

LA-UR-17-28212

Summary

  • LANL is partnering closely with NNSA and the
  • ther National Laboratories to help develop the

commercial domestic production of 99Mo without the use of HEU.

  • Under the M3 99Mo Program, we are currently

supporting SHINE Medical Technologies and NorthStar Medical Radioisotopes.

  • Leveraging the unique capabilities of the

National Laboratories to facilitate the domestic production of 99Mo.