Brown-Paul · Source catalogue

Brown applies Tesla's resonance idea to radioactive decay. A 'resonant nuclear oscillator' is an LC (inductor-capacitor) tank circuit with a radioactive source built in, tuned to its self-resonant frequency. He says the source adds energy every cycle through the 'Beta Voltaic Effect', so only a start-up energy equal to the losses is needed and the tank then becomes a self-driven 'Nuclear Powered Oscillator'. Output leaves through an impedance-matched transformer as high-frequency AC. Start-up: a high-voltage supply charges the capacitor, which is discharged to ground through a Class C amplifier at the resonant rate; once a spectrum analyser shows clean oscillation both are 'removed' within seconds. Output power is found from the voltage drop across a known resistor and 'double-checked' by direct current measurement. The beta-voltaic effect is explained as ionisation: one Sr-90 beta absorbed in copper frees 80,000 ions in 0.030 inch, swept along by the applied emf, which he reads as 'current amplification', lower resistance and higher conductivity in a 'Burke Cell' (a battery in series with a radioactive conductor). He states that the energy comes from the work of ionisation, not from the ions, field or electrodes. Moseley's 1913 beta cell is credited as the first demonstration. An early prototype 'generated electricity' but showed frequency instability and material degradation; Cs, Sr, Ra, Kr, tritium and promethium sources are said to have been tried; Kr-85 or Sr-90 are planned. Kr-85 supply: about 1 MCi per year from processing, 42 MCi in existing inventory, 8,500 Ci per ton of spent fuel; Kr-85 is called 'the most environmentally acceptable radioisotope available for power production'. 'Preliminary data suggests' 0.25 W per cm3 (the text does not say thermal or electrical, nor name the isotope in that sentence). Targets: batteries of 10 to 5,000 mW for oil-well tools and ocean sonar, competitive with chemical batteries for lifetimes over two years at remote sites. Brown's 1987 reference is titled 'The Moray Device and the Hubbard Coil were Nuclear Batteries'. The paper contains no measured input or output power, efficiency, component values or raw data.

Key claims

• An LC tank circuit containing a radioactive source, tuned to resonance, can sustain oscillation and deliver net electrical power to a load beyond its own losses, after a one-time start-up pulse.
• Ionizing radiation absorbed in a current-carrying conductor produces 'current amplification' in proportion to source activity, with lower resistance and higher conductivity (the 'Beta Voltaic Effect' as applied in the Burke Cell).
• Resonant power output is measured as the voltage drop across a known resistor and double-checked by direct current measurement, with the start-up supply and Class C amplifier removed after a few seconds.
• Cs, Sr, Ra, Kr, tritium and promethium sources all worked in his prototypes (as stated, with no data).
• A Kr-85 fuelled resonant nuclear battery can reach 'on the order of' 0.25 W per cubic centimetre ('preliminary data suggests'; thermal or electrical not stated).
• Kr-85 is the most environmentally acceptable radioisotope for power production.
• A resonant nuclear generator avoids the low efficiency, isotope limits and heavy shielding of conventional radioisotope generators.
• Radioisotope batteries are competitive with chemical batteries for lifetimes over two years at remote sites (10 to 5,000 mW range).
• The Moray device and the Hubbard coil were nuclear batteries (title of his 1987 reference only; no argument given).

Relevance: Brown's primary technical document: it sets out the resonant nuclear oscillator, the Tesla-resonance framing, the beta-voltaic explanation, the measurement method and the numbers (0.25 W/cm3, Kr-85 inventory) that the review checks. It names four earlier Brown papers (1987 to 1990) not in the folder.

Mainstream conflict: The ordinary beta-voltaic effect (radiation making electron-hole pairs collected at a junction) is mainstream and used in real betavoltaic cells with efficiencies of a few percent up to about 10 percent [memory] medium. Conflict lies in the 'resonant amplification' idea: resonance stores energy but cannot create it, so output cannot exceed the power carried by the decay particles; a radioactive source cannot lower a metal wire's own resistance by 'amplifying' current (ionisation adds carriers in gas, insulator or junction, not in a metal). No measured figures are given for how 'net' power was measured. Wording of 0.25 W/cm3 as an 'energy density' is a unit slip (W/cm3 is power density).

Front page transcribed from the page image: Appl. No. 153,070, filed Feb. 8, 1988, a continuation of Ser. No. 855,607 (Apr. 23, 1986, abandoned); Int. Cl. G21H 1/00; U.S. Cl. 310/305, 136/202, 376/320; ten cited US patents including Burke 3,409,820 and 3,530,316 (also printed beside the Burke cell in the paper's Fig. 3); examiner Deborah L. Kyle; '10 Claims, 4 Drawing Sheets'. Abstract (verbatim, read from image): 'A nuclear battery in which the energy imparted to radioactive decay products during the spontaneous disintegrations of radioactive material is utilized to sustain and amplify the oscillations in a high-Q LC tank circuit is provided. The circuit inductance comprises a coil wound on a core composed of radioactive nuclides connected in series with the primary winding of a power transformer. The core is fabricated from a mixture of three radioactive materials which decay primarily by alpha emission and provides a greater flux of radioactive decay products than the equivalent amount of a single radioactive nuclide.' The drawing shows a segmented ring core with eight pole pieces (9a-9h), coils, a hub and a capacitor. The only performance statement, from the full patent text on Google Patents [web, https://patents.google.com/patent/US4835433A/en, verified by the arbiter], is 23 A at 400 V at 86 kHz into a resistive load from a 1 mCi radium needle plus 200 g uranium plus 100 g thorium, with no efficiency or input power given. Design shift: the patent puts the radioactive material in the inductor core (alpha emitters), while the 1990 paper puts a Sr-90 beta source beside the coils and never mentions the three-nuclide core.

Key claims

• A coil wound on a core of radioactive nuclides, in series with a transformer primary in a high-Q LC tank, can sustain and amplify oscillations from the energy of the decay products.
• A mixture of three alpha-emitting radionuclides provides a greater flux of decay products than the equivalent amount of a single nuclide.
• [web] The patent example delivers 23 A at 400 V (about 9.2 kW if volts times amps were real power) from a 1 mCi radium needle plus 200 g U plus 100 g Th, a ratio of about 5e7 to the decay power available (see example.py).

Relevance: Gives the only quantitative performance figure in the whole project and the legal statement of the resonant-oscillator claim. A granted patent is not evidence the device works.

Mainstream conflict: Decay power of the stated sources is of order 1e-4 W, so 9 kW cannot come from the decay; activities of a mixture simply add and cannot exceed the sum of the separate activities, so the 'greater flux than a single nuclide' wording is only true per unit mass of a hotter nuclide, not as a gain. Volts times amps is not real power without phase information.

p.4 holds Figs 1-6 and p.5 holds Figs 7-12. Fig. 2 (inner title wrongly printed 'Figure 4') shows prior-art nuclear converters (USP 2,552,050 Beta Cell; 2,858,459 secondary emission; 3,094,634 p-n junction; SNAP-27 RTG) and a table of 60 patent numbers. Fig. 3 is the Burke cell (battery, radioactive conductor, load; USP 3,409,820 and 3,530,316). Fig. 4: Sr-90 beta in a copper wire, '80,000 ions, .030 in', with a six-item list that includes 'flux cutting', 'collapsing magnetic field' and 'reduced resistance & increased conductivity', which the text never explains. Fig. 5: beta-voltaic converter cartoon with electrodes A and B. Fig. 6: LC tank with R < 2 sqrt(L/C) and dU/dt = -i^2 R. Fig. 7: LC tank with a 'Source' bar and the key criterion 'Beta Flux >= i^2 R' with f = 1/(2 pi sqrt(LC)). Fig. 8: transformer output to a load marked '50 KHz'. Fig. 9: start-up and metering schematic: a '10 KV' supply through a diode charges the tank capacitor; a 'Class C' element goes from the tank to ground; a spectrum analyser is inductively coupled; the transformer secondary has a centre tap tied to a ground symbol (not a battery) between two capacitor pairs and series inductors, ending in a load with a voltmeter across it and an ammeter in series in the lower return lead. No switches are drawn. Fig. 10: photograph of disassembled hardware with a radiation trefoil. Fig. 11: prototype schematic with an Sr-90 box, coils labelled 'Be-Cu' and 'Ag', terminals '1. HVDC in to start' and '2. Class C Amp. to ground (to start)', the same filter and meters (a schematic, not 'the actual wiring' as the text says). Fig. 12: photograph of a bench with a box 'RADIOACTIVE MATERIALS' (not the 'economic comparison' the text says). No values for L, C, R, power or efficiency appear on any sheet.

Key claims

• Fig. 7: the beta flux must be at least the ohmic loss i^2 R for the tank to sustain itself.
• Fig. 8: the operating frequency is 50 kHz (the patent example gives 86 kHz).
• Fig. 4: radiation in a wire gives reduced resistance through 'flux cutting' and a 'collapsing magnetic field'.

Relevance: Shows how the power was supposedly measured (voltmeter across load, ammeter in series, no phase measurement) and states the one energy criterion of the scheme. Fig. 7 is load-bearing for the review.

Mainstream conflict: Fig. 4's magnetic mechanism is not a known conductivity mechanism and is inconsistent with the paper's own statement that the energy comes from ionisation work. Voltmeter-times-ammeter readings on a reactive 50 kHz network do not give real power without phase.

Ph.D.; External Professor of Electrical Engineering and Physics at EuroTechnical Research University; former Director of IsoGen Isotopic Research Laboratory; member of ANS, AIAA, SAE and the Association of Distinguished American Scientists; five US and five international patents; over 30 disclosure documents; Who's Who listings 1992-93 and 1993-94; books 'Isotopic Power' and 'Alternate Energy Notebook'. Talks: ANS Annual Meeting June 1990 (Beta Voltaic Effect), 26th IECEC (Intersociety Energy Conversion Engineering Conference) Aug 1991 (resonant nuclear generators), 27th IECEC Aug 1992 (solid state isotopic energy converter), 3rd National Technology Transfer Conference Dec 1992, 10th Symposium on Space Nuclear Power Jan 1993. Isotopic energy conversion research since September 1982; worked at Atomic Energy of Canada Nordion, Oak Ridge and Battelle Pacific Northwest. All self-reported and unchecked.

Key claims

• Brown held five US patents and a PhD and has presented resonant nuclear generator work at conferences 1990 to 1993 (self-reported).

Relevance: Context on credentials and the later publication trail; he published in conference proceedings and magazines, not refereed journals. Postdates the 1990 paper.

Mainstream conflict: none (biographical; credentials not verified)

The US Department of Energy expects to spend $150 billion disposing of Cold War radioactive waste. Paul Brown, 'a physics PhD from Boise, Idaho', says he can do it for less than a quarter of that (under $37.5 billion) without burying waste, by bombarding it with gamma rays (the article also says alpha particles) so that long-lived isotopes become compounds that are safe 'within a few months' rather than thousands of years. He calls it 'textbook radiochemistry' and says he found no earlier proposal. Bob Park (American Institute of Physics) says it is 'not far-fetched'; John Schiffer (Argonne) agrees that gamma radiation 'could convert long-lived radioactive isotopes into shorter-lived ones' but warns of enormous excess heat; Gary Doolen (Los Alamos) says high-energy gamma rays are very expensive to make. Brown replies that the heat could generate more electricity than the plant needs, that a typical neutron-beam research project costs $1.3 billion, and that he plans a plant for $5 million. With a pending patent he formed a company, Nuclear Solutions, to run tests at the University of Illinois or MIT 'soon'; he is negotiating with the DOE (which has already spent $2.5 billion on waste-cleanup technologies) to fund a pilot plant. The article says 'Some waste products have half-lives of 24,000 years' (the Pu-239 half-life is about 24,100 y [memory, high], which makes plutonium, a transuranic, Brown's own headline example) and that 'Brown showed that when nuclear waste is showered with gamma rays, it's transformed'; no demonstration, data, cross-sections, named experiment or independent test is given. Brown's vision: nuclear stations that neutralise waste as it is produced. The article loosely says alpha particles turn beryllium into carbon.

Key claims

• Gamma-ray irradiation of nuclear waste can transmute long-lived isotopes into species that become safe within months.
• A gamma-ray transmutation plant could treat US Cold War waste for under a quarter of the DOE's $150 billion estimate.
• The heat from gamma irradiation could generate more electricity than the plant itself consumes.
• A complete plant could be built for about $5 million.
• 'Brown showed' the transformation (stated by the journalist; no demonstration is on record).

Relevance: Brown's later (1999) project: waste transmutation by photonuclear reactions, distinct from the 1990 battery. The second set of claims in the folder and the only outside reaction (three physicists, with caveats).

Mainstream conflict: Photonuclear (gamma,n) reactions are real and transmutation of waste is a mainstream research topic (accelerator-driven systems, laser-Compton gamma sources) [memory] medium. Conflict is in scale, cost and net energy: high-energy gamma beams are costly, photonuclear cross sections are millibarn-scale around the giant dipole resonance, 'safe within months for all waste' is not shown, and (gamma,n) on Pu-239 gives Pu-238 (about 88 y [memory, high]) while competing photofission makes new fission products, so Brown's own long-lived example is the case where the idea works worst.