Four fields. Three tools published.

Radiation performance testing, computed in the browser.

Instrument performance against IEC standards, dose rate and shielding, radionuclide transport. Every tool names the standard or model it implements, runs with nothing to install, and gives you a record you can keep.

RadCalc RadiMeter M-Phreefiteq

A working bench in daylight. At the left a handheld radiation survey meter stands on its folding bail: a segmented display showing a bar-graph scale above a four-figure reading, three membrane keys marked with a triangle, a square and a circle, a knurled rotary selector, and an engraved data plate. A coiled cable runs from it to a detector probe lying in the foam of an open hard case. At the centre an open laptop shows a numbered table of measured figures beside a plot on a logarithmic grid, each point carrying a short error bar, with one horizontal amber reference line across it. At the right an open notebook repeats the same figures in two hand-written columns under a plotted copy of the curve, with a steel rule and a mechanical pencil across the page.

Published tools

Drafting plate showing the geometry of a dose calculation, drawn on a tinted drawing ground with a faint grid. At the left a point source, a small red bead. From it a fan of amber rays spreads to the right and keeps spreading — rays from a point never converge again. Across the middle stands a shield wall seen edge-on and cut through: a thick layer of dense lead in tight hatching bonded to a thick layer of concrete showing coarse aggregate in its cut face. The rays pass through the wall and continue thinner on the far side, which is the attenuation. Two dashed amber rays leave the source at a steeper angle, bend once inside the wall material and arrive at the dose point — the build-up from scattered radiation. On the axis a dose point is marked by an amber circle and cross, with the fan continuing past it, and a dash-dot centre line runs the whole width with regular distance ticks.

01Dose assessment and shielding

RadCalc

The hand calculations this field repeats — point-source dose rate with attenuation and buildup, beta range and bremsstrahlung, detection limits, decay, specific activity and stay time. Constants are computed from IAEA and NIST open data rather than copied from a table, so every assumption behind a number stays visible.

Open RadCalc

Cutaway drawing of a calibration irradiation room. An irradiator stands on the floor at the left: a shielded housing, cut open to show a small sealed source, with a collimator whose stepped bore opens the beam into a cone. The cone ends on a radiation protection instrument standing on an XYZ positioning stage that rides a rail along the beam, level with the beam axis. Beyond the room wall is a control station with a desk and computer.

02Instrument metrology

RadiMeter

Performance testing of radiation measuring instruments against IEC standards — energy and angular response, linearity, statistical fluctuation, response time and alarm accuracy. The characteristic tests those standards define are performance tests, run here as a worksheet that keeps every measured figure.

Open RadiMeter

Cutaway block diagram of a deep geological repository with vertical emplacement. From the top down: grass and conifers, topsoil, subsoil, blocky weathered rock, then deep granite filling the block, its cut faces hatched and scattered with mineral grains and crossed by long thin fracture traces and pale veins. A deposition tunnel is cut open along its length, with a segmented sprayed-concrete arch, rock bolts in the crown and layered backfill closing its far end. A row of six vertical deposition holes is bored down into the tunnel floor, so many canisters can be emplaced along one tunnel. The two nearest holes are cut open: stacked bentonite ring blocks line the wall and a steel canister stands upright inside on a bentonite bottom block, half in section so the wall thickness shows as hatching and the waste as red. Three further holes are sealed with caps flush to the floor, and one beyond is still empty. A concrete-lined shaft rises to the surface. Thin amber streamlines leave the canisters, pass outward through the bentonite and up through the rock fractures, and dashed amber contours mark the spreading plume.

03Waste disposal and transport

M-Phreefiteq Beta

Migration of radionuclides through the geosphere after deep geological disposal. Thermodynamic speciation and surface-complexation modelling coupled to transport, so that sorption and solubility are derived rather than assumed.

In beta: the calculations run, but the code has not been through the verification and validation a licensing safety assessment requires. The interface is in Korean for now. Open M-Phreefiteq

A fourth field — environmental radioactivity and dispersion — is in development. This page names a tool only once it exists.

How the tools are built

Stated basis

Every calculation names the standard, clause or model it implements. The clause is cited, never reproduced.

Nothing to install

No desktop install, no input deck. The input is a form and the result is immediate.

A record you keep

Export to a spreadsheet or print a report. Your data stays in your browser unless you send it.

Scope and limitations

Radiation Lab is not an accredited calibration or testing laboratory, and the tools published here do not replace accredited calibration, testing, or a licensed safety assessment. A result is only as good as the data and assumptions entered into it, and remains the responsibility of the person who records it. Each tool states this in full.

Each lab publishes its own documents, and those documents govern that lab. RadiMeter — disclaimer, privacy, terms. M-Phreefiteq — disclaimer, privacy, terms (Korean). One account works across the platform, and each lab's privacy policy states what it stores.

Who runs this. Radiation Lab is built and maintained by one person, who works in the radiation field at a non-profit organisation. It is a personal project, built outside that work: it is not published by that organisation, carries no institutional endorsement, and the organisation is not responsible for anything here.

Questions, corrections and collaboration: contact@radiation-lab.com