Company: US Navy
Posted on: November 19, 2021
It takes hard work and smarts to get you into the reactor room. But
if you have a strong interest in math, chemistry, physics and
engineering, you might just have what it takes to be a Machinist's
Mate Nuclear. As an MMN, you are the Navy's nuclear reactor
mechanic. It is your responsibility to perform all maintenance on
the steam-powered propulsion plants aboard aircraft carriers and
submarines to ensure our fleet can move safely. And your hard work
can lead to great rewards. As an MMN, you'll be eligible to receive
up to a $28,000 bonus for first-time enlistment. Re-enlistment
bonuses are also available. Think you have what it takes to make a
nuclear-powered ship run?
What to Expect
Machinist's Mate Nuclear
Nuclear Machinist's Mates operate and maintain steam turbines and
reduction gears used for nuclear ship propulsion and auxiliary
machinery such as turbogenerators, pumps and oil purifiers. They
also maintain auxiliary machinery outside of main machinery spaces,
such as electrohydraulic steering engines and elevators,
refrigeration plants, air conditioning systems and desalinization
plants. They may also operate and maintain compressed gas producing
plants. Nuclear-trained MMs perform duties in nuclear propulsion
plants operating reactor control, propulsion and power generation
As a Machinist's Mate Nuclear, you'll have the opportunity to work
at sea or ashore. Your assignment could also place you in an
intense, fast-paced environment aboard a nuclear-powered submarine
or aircraft carrier.
Learn more about submarine service and life on a ship .
Training & Advancement
Upon completion of the initial 7-9 week training at Recruit
Training Command Great Lakes, (known as Boot Camp), those pursuing
a Machinist's Mate Nuclear role report to "A" School in Charleston,
SC, for six months. Here, they develop a working knowledge of
technical mathematics and power distribution. Students learn to
solve basic equations using phasors, vector notations and basic
trigonometry and analyze DC and AC circuits. They also learn how to
operate electrical equipment using controllers, and how to properly
test, maintain, troubleshoot, and repair electrical circuits,
motors and other related electrical equipment.
From there, MMNs move on to Naval Nuclear Power School (NNPS), also
in Charleston, SC. Here they learn theory and practical application
of nuclear physics and reactor engineering. The six-month course
provides a comprehensive understanding of a pressurized-water Naval
nuclear power plant, including reactor core nuclear principles,
heat transfer and fluid systems, plant chemistry and materials,
mechanical and electrical systems, and radiological control.
Following NNPS, MMNs begin prototype training in their rating
specialty at one of two Nuclear Power Training Units (NPTUs) -
located in Charleston, SC, and Ballston Spa, NY. This six-month
course teaches the fundamentals of a Naval nuclear power plant and
the interrelationship of its mechanical, electrical, and reactor
subsystems. Students develop oral communications skills, obtain an
understanding of nuclear radiation, and gain knowledge of the safe
operation of a complex Naval nuclear power plant.
In Nuclear Operations, promotion opportunities are regularly
available but competitive and based on performance.
It's also important to note that specialized training received and
work experience gained in the course of service can lead to
valuable credentialing and occupational opportunities in related
fields in the civilian sector.
Beyond offering access to professional credentials and
certifications, Navy technical and operational training for a
Machinist's Mate Nuclear can translate to credit hours toward a
bachelor's or associate degree through the American Council on
You may also continue your education through undergraduate degree
opportunities like the Navy College Program and Tuition Assistance
and the Post-9/11 GI Bill.
Qualifications & Requirements
A high-school diploma or equivalent is required to become an
Enlisted Sailor and Machinist's Mate Nuclear in the Navy. Those
seeking a role as a Machinist's Mate Nuclear must be U.S. citizens
with successful completion of one year of Algebra, and who can meet
eligibility requirements for a security clearance.
General qualifications may vary depending upon whether you're
currently serving , whether you've served before or whether you've
never served before .
There are no part-time jobs as a Navy Reserve Sailor in this role.
Go back to Careers to find other jobs that have a Reserve
component. You can also find out more about what life is like as a
Reserve Sailor in the Navy.
Keywords: US Navy, Buffalo , Nuclear Engineer, Engineering , Buffalo, New York
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