physics

McMaster Nuclear Reactor

McMaster Nuclear Reactor is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand McMaster Nuclear Reactor rather than just read about it. In short: The McMaster Nuclear Reactor (MNR) is a 5 MWth open pool reactor located on the campus of McMaster University, in Hamilton, Ontario, Canada. Description MNR began operating in April 1959, as the first university-based research reactor in the Commonwealth of Nations, and has been the highest-flux research reactor in Canada since the closing of the National Research Universal (NRU) reactor at Chalk River Laboratories…

Key takeaways

McMaster Nuclear Reactor belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect McMaster Nuclear Reactor to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of McMaster Nuclear Reactor from memory before moving on to harder problems.

Reference excerpt

The McMaster Nuclear Reactor (MNR) is a 5 MWth open pool reactor located on the campus of McMaster University, in Hamilton, Ontario, Canada.

Description MNR began operating in April 1959, as the first university-based research reactor in the Commonwealth of Nations, and has been the highest-flux research reactor in Canada since the closing of the National Research Universal (NRU) reactor at Chalk River Laboratories in 2018. The reactor consists of two connected pools; the core can be located and operated in either one. This allows the core to be moved away from experimental apparatus for maintenance. MNR is an example of a reactor where the core is visible while the reactor is operating. The core itself appears to be glowing blue when looked at from the surface, as a result of the Cherenkov radiation. MNR is the only research reactor in Canada with a full containment structure. The reactor is fuelled with low-enrichment uranium and cooled and moderated with light water. Heat is transported to the atmosphere through the secondary coolant system via two cooling towers adjacent to the reactor building. The reactor is used for a variety of purposes: undergraduate education involves NAA (Neutron Activation Analysis), reactor physics experiments and radioisotopes for tracers and counting experiments. Graduate studies use neutron beams for neutron radiography, neutron diffraction, prompt gamma NAA and geochronological techniques. Commercial activities include radioisotope production and neutron radiography. The facilities also include a hot cell and high-activity cobalt source and high level radioisotope laboratories. Researchers using MNR are based at McMaster as well as other universities in Canada and around the world. The MNR also produces half of the world's supply of iodine-125, a radioisotope that is used to treat various types of cancer. During the 2009 shutdown of the Chalk River reactor, however, the university increased production of iodine-125 by 20% and offered to retrofit the MNR to handle the production of molybdenum-99. The MNR had previously handled the production of molybdenum in the 1970s when the Chalk River facilities underwent a vessel replacement.

Alleged links to terrorism and lawsuit Paul L. Williams, an American author, has published books which claim that McMaster University in general and the nuclear reactor specifically have been infiltrated by terrorist groups, who have managed to steal 82 kilograms (181 lb) of unspecified nuclear material. The University strenuously denies these claims, and in 2007 was in the process of suing Williams for upwards of $2 million. The Canadian Nuclear Safety Commission, which regulates all radioactive material in Canada, have released a letter stating that "We can confirm that there has never been a report of any nuclear material that has been lost or stolen from McMaster's reactor".

See also Nuclear reactor Research reactor

References

External links Official website

Illustrations

Worked examples

Example 1 — a first encounter with McMaster Nuclear Reactor

Start with the simplest possible case. Write down what McMaster Nuclear Reactor claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to McMaster Nuclear Reactor before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about McMaster Nuclear Reactor ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of McMaster Nuclear Reactor

In research: McMaster Nuclear Reactor appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses McMaster Nuclear Reactor in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: McMaster Nuclear Reactor is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1959 establishments in Ontario, Buildings and structures in Hamilton, Ontario, Nuclear research institutes in Canada, so understanding it makes those chapters shorter.
In everyday life: Look for McMaster Nuclear Reactor outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study McMaster Nuclear Reactor in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what McMaster Nuclear Reactor means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain McMaster Nuclear Reactor out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is McMaster Nuclear Reactor in simple terms?

The McMaster Nuclear Reactor (MNR) is a 5 MWth open pool reactor located on the campus of McMaster University, in Hamilton, Ontario, Canada. Description MNR began operating in April 1959, as the first university-based research reactor in the Commonwealth of Nations, and has been the highest-flux re…

Why does McMaster Nuclear Reactor matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study McMaster Nuclear Reactor?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on McMaster Nuclear Reactor.