astronomy

Universities Research Reactor

Universities Research Reactor is a astronomy 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 Universities Research Reactor rather than just read about it. In short: Universities Research Reactor, also known as Universities' Research Reactor or University Research Reactor, was a small Argonaut class nuclear research reactor in Risley, Warrington, England that went critical on 7 July 1964. It was jointly owned and operated by Manchester and Liverpool universities and used for performing neutron activation work and training reactor operators.

Key takeaways

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

Reference excerpt

Universities Research Reactor, also known as Universities' Research Reactor or University Research Reactor, was a small Argonaut class nuclear research reactor in Risley, Warrington, England that went critical on 7 July 1964. It was jointly owned and operated by Manchester and Liverpool universities and used for performing neutron activation work and training reactor operators.

Design

The reactor used highly enriched uranium metal fuel clad in aluminium. The fuel elements consisted of bundles of flat plates rather than rods. The core was cooled by light water. The fuel elements were situated within six open-topped aluminium tanks containing water that were separated and surrounded by graphite. This meant that moderation was part by the water within the tanks and part by graphite - with graphite serving as the reflector. Reactivity control was provided by four semaphore signal–type control blades held by magnetic clutches to shafts that could be driven by geared electric motors. The blades were made of cadmium plates riveted to aluminium blades. The insertion of a single blade was sufficient to shut down the fission chain reaction. The simple control system did not use voting logic. Any detected fault resulted in an immediate scram. Power failure also produced an immediate scram as the magnetic clutches on the control blades would disengage, certain control instrumentation had battery back up support. The heat generated by fission was carried away by the cooling water and disposed of outside the facility by means of a forced-draft cooling radiator. Due to the small size of the core and low burn up of the fuel, the disposal of fission product heating was not an issue. The concrete shielding was penetrated by a number of holes enabling neutron beams to be obtained for the purpose of irradiating samples and several pipes that enabled samples in sample carriers to be inserted into the reactor and subsequently removed to the adjoining radiochemical laboratory for study.

Operations The construction works started in 1962 and went critical on 7 July 1964. In later years the reactor was rated at 300 kW thermal however originally the output was 100 kW thermal. A study was undertaken (around 1980) to investigate increasing the power to 1 MW thermal; however, this was deemed to be too difficult and the plans were abandoned.

Decommissioning Decommissioning work began in 1992 and was finished in 2006. The reactor fuel being reprocessed. The nuclear waste produced during the dismantling operations was moved to Sellafield for permanent storage.

References

Worked examples

Example 1 — a first encounter with Universities Research Reactor

Start with the simplest possible case. Write down what Universities Research Reactor claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Universities Research 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 Universities Research 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 Universities Research Reactor

In research: Universities Research Reactor appears in astronomy 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 Universities Research 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: Universities Research Reactor is common in secondary-school and first-year university syllabi. It links to neighbouring topics Argonaut class reactor, Buildings and structures in Warrington, Buildings at the University of Manchester, so understanding it makes those chapters shorter.
In everyday life: Look for Universities Research 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 Universities Research Reactor in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Universities Research 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 Universities Research Reactor out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Universities Research Reactor in simple terms?

Why does Universities Research Reactor matter?

Because it connects several astronomy 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 Universities Research 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 Universities Research Reactor.