The US Department of Energy has greenlit the safety basis for the MARVEL microreactor, clearing the path for its first experiments.
The US Department of Energy has officially greenlit a critical safety blueprint for the MARVEL microreactor. This clears the path for the project to begin its first nuclear physics experiments at Idaho National Laboratory .
The approval of the Preliminary Documented Safety Analysis marks a definitive shift from design to demonstration. This document serves as the “safety basis” for MARVEL’s initial “dry criticality” test, which is a near zero-power experiment designed to validate how the reactor’s physics behave before it transitions to full-power operation.“The PDSA affirms that the reactor can operate safely under this configuration and paves the way for final safety documentation and full assembly of the reactor,” said INL in a press release.A “blueprint” for the IndustryMARVEL is a sodium-potassium-cooled reactor designed to generate 85–100 kilowatts of thermal energy and roughly 20 kW of electricity. While small in scale, its regulatory impact is expected to be massive.“This is more than just a regulatory requirement—it’s a blueprint for the future of advanced nuclear,” added Abdalla Abou-Jaoude, the MARVEL microreactor lead at INL.“By receiving approval for our safety documentation, we are now able to share this template with developers to learn from our process and streamline their own timelines.”The project’s risk-informed methodology has already begun influencing other high-profile DOE-authorized projects, including Pele, the Molten Chloride Reactor Experiment, and VALKRE.Precision control with swapping rods for drumsThe safety approval follows a significant engineering milestone in how the reactor is controlled. In a departure from decades of nuclear tradition, INL researchers have successfully tested a Reactivity Control System that ditches bulky vertical control rods in favor of high-precision rotating drums.Standard nuclear plants typically regulate power by sliding rods in and out of the core. MARVEL, however, utilizes four drums positioned on the core’s periphery. The reflective side of the drum bounces neutrons back into the core to increase power, while the absorber side soaks up neutrons to slow or stop the reaction.“The control drum and control rod have the same basic functions—one translates, one rotates,” explained Anthony Crawford, a researcher in INL’s mechatronics group. This rotating design allows operators to fine-tune the reactor’s output with extreme precision, a necessity for the compact nature of microreactors.Identifying potential issues earlyThe upcoming “dry criticality” experiment will be conducted at INL’s Transient Reactor Test Facility. This phased approach allows researchers to identify potential issues early before moving toward final assembly and fuel loading.“We’re proud to play a leading role in helping to make microreactors commercially available,” remarked John Jackson, national technical director for the DOE Office of Nuclear Energy’s Microreactor Program.With the safety documentation secured and the control systems tested, the team is now finalizing the requirements for full reactor assembly, bringing the prospect of portable, carbon-free nuclear power one step closer to reality.“The next phase includes engagement with DOE-Idaho and project stakeholders to finalize the safety basis for full reactor assembly and fuel loading,” concluded the press release.
Environment MARVEL Nuclear Energy Nuclear Reactor
United States Latest News, United States Headlines
Similar News:You can also read news stories similar to this one that we have collected from other news sources.
State Department allows up to $40M to be used for evacuation flights for Americans in MideastThe administration faces accusations of not adequately planning for the war launched on Iran.
Read more »
New Mexico Justice Department Searches Epstein's Zorro RanchThe New Mexico Department of Justice conducted a search of Zorro Ranch, a property once owned by Jeffrey Epstein, as part of an ongoing criminal investigation into allegations of illegal activity. The investigation was reopened following the release of new information by the U.S. Department of Justice.
Read more »
Justice Department official Ed Martin accused of ethics violations for letter to Georgetown deanThe office that enforces the ethics code for attorneys in the nation’s capital has accused Justice Department official Ed Martin of professional misconduct for a threatening letter that he sent to Georgetown Law School’s dean last year.
Read more »
Ethics office targets Justice Department official Ed Martin over letter to Georgetown deanThe office that enforces the ethics code for attorneys in the nation’s capital has accused Justice Department official Ed Martin of professional misconduct for a threatening letter that he sent to Georgetown Law School’s dean last year. Martin was the interim U.S.
Read more »
Justice Department official Ed Martin accused of ethics violations for letter to Georgetown dean -WASHINGTON (AP) — The office that enforces ethics standards for attorneys in the nation's capital has accused Justice Department official Ed Martin of
Read more »
Guardians of the Galaxy’s MCU Future Addressed by Marvel StarsVeterans of Marvel's Guardians of the Galaxy films discuss the possibility of a fourth installment ever getting off the ground.
Read more »