Core Thermal-Hydraulics Methods Engineer at Oklo Inc in Santa Clara, CA | USD73,000-157,000 | Kablio

Role

Description

thermal modeling

method development

tool automation

verification

design collaboration

technical reporting

Developing methods to analyze core thermal-hydraulic behavior at steady-state and during transients
Modeling core thermal-hydraulic behavior using
Developing and utilizing analysis methods that efficiently and effectively build confidence in a design
Collaborating cross-functionally to define design requirements, and providing technical feedback to quick-iterating design teams
Document work using modern tools and techniques, and write well-written, thoughtful technical reports
Automation, verification, and validation of modeling and simulation tools in support of analyses

Requirements

python

ci/cd

cfd

subchannel

heat transfer

phd

Experience with CI/CD computing environments
Comfortable in a fast-paced, highly iterative environment
Experience with numerical methods and software development for heat transfer and fluid flow problems
Experience with subchannel analysis codes, such as DASSH, MOOSE-Subchannel, COBRA-TF, or similar
first principles approaches and in-house flow network models
Experience with low-fidelity and intermediate-fidelity (e.g., porous body and correlation-based) models for heat transfer and fluid flow
Willing and able to learn quickly
Core competencies in heat transfer, fluid dynamics, and thermodynamics first principles
Experience with reactor systems codes, such as SAS4A/SASSYS-1, SAM, RELAP, TRACE, or GOTHIC
one-dimensional systems codes such as SAS4A/SASSYS-1 or SAM
Experience with high-fidelity computational fluid dynamics analysis
Able to communicate technical content and results verbally
Experience with qualification and validation of analyses
Fluency with Python
Bachelors, Masters, or PhD in a technical field, such as nuclear, mechanical, or aerospace engineering
Knowledgeable about the fluid physics related to reactor cores and subchannel-level thermal-hydraulic (thermal fluids) analysis
Proficiency with thermal-hydraulics (thermal fluids) analysis methods
subchannel codes such as DASSH, or MOOSE-Subchannel
Experience with data processing (e.g., pre-processing, post-processing, scripting)
An excellent writer who can write in modern active voice, so make your cover letter compelling and write it well!

Benefits

Information not given or found

Training + Development

Information not given or found

Interview process

Information not given or found

Visa Sponsorship

Information not given or found

Security clearance

Information not given or found

Company

Overview

Pioneering the future of nuclear energy with compact and efficient reactor designs.
Aiming to provide reliable, low-cost power to address the global clean energy challenge.
Innovative approach prioritizes scalability and sustainability.
Reshaping energy perception with a team of passionate engineers and scientists.
Enabling small modular reactors for energy delivery to remote locations and industries.
Focus on safety and minimal waste to meet rising global energy demand.
Utilizing a unique fuel design for greater efficiency and sustainability compared to traditional reactors.
Supported by private investment and government grants advancing clean energy solutions.
Developing prototypes with commercialization goals for the future.

Culture + Values

A startup person: you aren't driven by titles or hierarchy, and prefer efficiency to excess process.
Motivated: you are self-motivated and bring an enthusiasm to the team that goes beyond clocking in and clocking out.
A team-player: Oklo genuinely is a team; we aren't about taking credit for ourselves or pushing blame to others.
An excellent communicator: technically competent and a clear, upbeat communicator.
Creative: able to identify and invent solutions when things fall outside clear scopes or processes without micromanagement.
Detail-oriented: focus on excellence, consistency, quality; even grammar and spelling matter.

Environment + Sustainability

15–50 MWe

Aurora Reactors Capacity

Delivers clean, reliable, and affordable energy with a 10-year refuel cycle.

over 90%

Fuel Recycling Efficiency

Advanced fuel recycling extracts over 90% of remaining potential energy from used fuel, lowering fuel costs significantly.

2030s

Fuel Recycling Facility Deployment

Commercial-scale fuel recycling facility deployment planned for the 2030s.

2027

First Aurora Deployment

First Aurora powerhouse deployment at Idaho National Laboratory targeted for 2027.

Developing fast fission power plants to deliver clean, reliable, affordable energy at scale using Aurora reactors with a 10-year refuel cycle.
Master Power Agreement to deploy up to 12 GW of Aurora powerhouses for Switch through 2044.
Secured Letters of Intent covering up to 750 MW and a pipeline of ~2,100 MW of low-carbon power for U.S. data centers.
Strategic alliance with Liberty Energy combining near-term natural gas solutions with future integration of zero-carbon Aurora reactors.
No explicit net-zero target date published.

Inclusion & Diversity

Articles

Energy overview

Oklo selects Kiewit as lead constructor

Proposed acquisition of Atomic Alchemy

Role

Description

thermal modeling

method development

tool automation

verification

design collaboration

technical reporting

Developing methods to analyze core thermal-hydraulic behavior at steady-state and during transients
Modeling core thermal-hydraulic behavior using
Developing and utilizing analysis methods that efficiently and effectively build confidence in a design
Collaborating cross-functionally to define design requirements, and providing technical feedback to quick-iterating design teams
Document work using modern tools and techniques, and write well-written, thoughtful technical reports
Automation, verification, and validation of modeling and simulation tools in support of analyses

Requirements

python

ci/cd

cfd

subchannel

heat transfer

phd

Experience with CI/CD computing environments
Comfortable in a fast-paced, highly iterative environment
Experience with numerical methods and software development for heat transfer and fluid flow problems
Experience with subchannel analysis codes, such as DASSH, MOOSE-Subchannel, COBRA-TF, or similar
first principles approaches and in-house flow network models
Experience with low-fidelity and intermediate-fidelity (e.g., porous body and correlation-based) models for heat transfer and fluid flow
Willing and able to learn quickly
Core competencies in heat transfer, fluid dynamics, and thermodynamics first principles
Experience with reactor systems codes, such as SAS4A/SASSYS-1, SAM, RELAP, TRACE, or GOTHIC
one-dimensional systems codes such as SAS4A/SASSYS-1 or SAM
Experience with high-fidelity computational fluid dynamics analysis
Able to communicate technical content and results verbally
Experience with qualification and validation of analyses
Fluency with Python
Bachelors, Masters, or PhD in a technical field, such as nuclear, mechanical, or aerospace engineering
Knowledgeable about the fluid physics related to reactor cores and subchannel-level thermal-hydraulic (thermal fluids) analysis
Proficiency with thermal-hydraulics (thermal fluids) analysis methods
subchannel codes such as DASSH, or MOOSE-Subchannel
Experience with data processing (e.g., pre-processing, post-processing, scripting)
An excellent writer who can write in modern active voice, so make your cover letter compelling and write it well!

Benefits

Information not given or found

Training + Development

Information not given or found

Interview process

Information not given or found

Visa Sponsorship

Information not given or found

Security clearance

Information not given or found

Company

Overview

Pioneering the future of nuclear energy with compact and efficient reactor designs.
Aiming to provide reliable, low-cost power to address the global clean energy challenge.
Innovative approach prioritizes scalability and sustainability.
Reshaping energy perception with a team of passionate engineers and scientists.
Enabling small modular reactors for energy delivery to remote locations and industries.
Focus on safety and minimal waste to meet rising global energy demand.
Utilizing a unique fuel design for greater efficiency and sustainability compared to traditional reactors.
Supported by private investment and government grants advancing clean energy solutions.
Developing prototypes with commercialization goals for the future.

Culture + Values

A startup person: you aren't driven by titles or hierarchy, and prefer efficiency to excess process.
Motivated: you are self-motivated and bring an enthusiasm to the team that goes beyond clocking in and clocking out.
A team-player: Oklo genuinely is a team; we aren't about taking credit for ourselves or pushing blame to others.
An excellent communicator: technically competent and a clear, upbeat communicator.
Creative: able to identify and invent solutions when things fall outside clear scopes or processes without micromanagement.
Detail-oriented: focus on excellence, consistency, quality; even grammar and spelling matter.

Environment + Sustainability

15–50 MWe

Aurora Reactors Capacity

Delivers clean, reliable, and affordable energy with a 10-year refuel cycle.

over 90%

Fuel Recycling Efficiency

Advanced fuel recycling extracts over 90% of remaining potential energy from used fuel, lowering fuel costs significantly.

2030s

Fuel Recycling Facility Deployment

Commercial-scale fuel recycling facility deployment planned for the 2030s.

2027

First Aurora Deployment

First Aurora powerhouse deployment at Idaho National Laboratory targeted for 2027.

Developing fast fission power plants to deliver clean, reliable, affordable energy at scale using Aurora reactors with a 10-year refuel cycle.
Master Power Agreement to deploy up to 12 GW of Aurora powerhouses for Switch through 2044.
Secured Letters of Intent covering up to 750 MW and a pipeline of ~2,100 MW of low-carbon power for U.S. data centers.
Strategic alliance with Liberty Energy combining near-term natural gas solutions with future integration of zero-carbon Aurora reactors.
No explicit net-zero target date published.

Inclusion & Diversity

Articles

Energy overview

Oklo selects Kiewit as lead constructor

Proposed acquisition of Atomic Alchemy