Executive Team

Meet our Leaders


Learn about the unique backgrounds they bring to their work at the XLNT Foundation






Dr. Mohan Doss is the President of the XLNT Foundation, an organization dedicated to overcoming the LNT model problem and facilitating full utilization of beneficial effects of radiation, for enhanced health. 


Dr. Mohan Doss has a PhD degree in Physics and has board certification from the Canadian College of Physicists in Medicine in nuclear medicine physics. He provides physics support for diagnostic imaging in a cancer center in Philadelphia.


Dr. Doss began a detailed study of the health effects of low-dose radiation to investigate the claims of increased cancer risk from diagnostic imaging based on the linear no-threshold (LNT) model. He noted that although considerable amount of evidence exists for the cancer preventive effect of low-dose radiation, such data have been ignored and the atomic bomb survivor data have been used to raise low dose radiation carcinogenic concerns in many publications. Dr. Doss’s analysis of the 2012 update to the atomic bomb survivor data showed that these data no longer support the LNT model but are consistent with the radiation hormesis model. However, many influential scientists continue to use the LNT model by quoting older atomic bomb survivor data as supportive evidence. Dr. Doss is also concerned that many publications with faulty data, analysis, and/or interpretation are used to support the LNT model while the evidences against the LNT model are ignored, and he has written several articles on the subject. Dr. Doss has participated in several debates and discussions on the health effects of radiation. 

Dr. Doss is one of the founding members of the international group Scientists for Accurate Radiation Information (SARI) that was formed in 2013 to correct the misinformation that is currently prevalent in our society on radiation health effects. Dr. Doss was given the Outstanding Leadership Award in the Field of Dose Response by the International Dose-Response Society in 2014. 





Dr. Jerry Cuttler is the Vice-President of the XLNT Foundation, an organization dedicated to overcoming the LNT model problem and facilitating full utilization of beneficial effects of radiation, for enhanced health.


Dr. Cuttler received his BASc-Eng degree (1964) in engineering physics from the University of Toronto and his MSc and DSc degrees (1967-1971) in nuclear sciences and engineering from the Israel Institute of Technology. Until 1974, he managed a radiation detector company.

At Atomic Energy of Canada Limited, he led the design and procurement of the reactor control, safety systems and radiation monitoring instrumentation for the first CANDU-6 reactors, the four-reactor Pickering-B station and the four-reactor Bruce-B station. He was engineering manager of AECL’s Bruce-B Project, resident engineering manager in Romania, engineering manager district heating reactors, manager of services to the eight-reactor Pickering station, engineering integration manager of the CANDU-9 Project and manager of technical services including Y2K support to 28 reactors.

Dr. Cuttler has been an active member of Professional Engineers Ontario, Canadian Nuclear Society (president 1995-1996), American Nuclear Society, American Physical Society, Canadian Nuclear Association, Health Physics Society, Canadian Radiation Protection Association and the International Dose-Response Society. He has written hundreds of technical reports for nuclear stations, tens of conferences papers and articles for peer-reviewed journals.

Starting in 2000, he provided services to Ontario Power Generation for returning Pickering Unit-4 to service and extending the life of the Pickering-B station, to AECL for completing reactors to supply radioisotopes for diagnostic scanning, to Bruce Power for restarting reactors 1/2 and extending the Bruce-B reactor lives for 30 years.

Since 1995, Dr. Cuttler has been assessing the health effects of ionizing radiation and drawing international attention to radiation hormesis. He presented tens of papers at many conferences pointing out that low exposures are stimulating for curing infections, extending life and reducing the incidences of cancer and congenital malformations. He organized adaptive response sessions at nuclear energy conferences, inviting renowned radiobiologists to present remarkable evidence. He has urged many oncologists to use total-body low-dose radiation in cancer therapy. He has intervened with regulators with submissions that identify beneficial effects following low doses and debunk the LNT assumption. He arranged presentations by world specialists in low dose at hospitals, universities, nuclear centers and societies. He continues to communicate positive low dose information and fight politicized radiation scares on the Internet and at professional and social clubs.





Charles Pennington is the Secretary of the XLNT Foundation, an organization dedicated to overcoming the LNT model problem and facilitating full utilization of beneficial effects of radiation, for enhanced health.


Charles W. Pennington is an executive level consultant in spent nuclear fuel storage/transport and radiological design and licensing, having retired from NAC International, Inc. in 2013. As a corporate officer and Vice President at NAC, Mr. Pennington led consulting, development, engineering, nuclear analysis, licensing, and business development over his 18 years there.  He also served as an IAEA consultant on technology issues, and as the Director of NAC’s Nuclear Spent Fuel Academy, an educational colloquium on nuclear spent fuel.


Following graduation from Duke University on an NROTC Scholarship with a degree in mathematics, Mr. Pennington served in the US Navy Nuclear Power program as an officer aboard a nuclear submarine.  He held positions of responsibility for both the submarine's reactor and for its nuclear weapons. Following this, he received an MS degree from North Carolina State University in Nuclear Engineering and an MBA from the University of Connecticut in Marketing and Finance.


Mr. Pennington led Business Development at NAC for many years prior to his retirement. As  Group Senior Vice President of Engineering and Development, he directed NAC’s successful development of several spent fuel technologies. Earlier, Mr. Pennington served as the Group Senior Vice President for  Consulting in all nuclear fuel cycle areas.


Before joining NAC, Mr. Pennington was Vice President, Technology and Business Development, for Holtec International, leading the company's initial development of nuclear spent fuel dry storage and transport technology. Prior to that,  Mr. Pennington served as Vice President at Transnuclear Inc., a subsidiary of AREVA, leading design development, commercialization, and sales efforts for a number of modular storage and transport systems, resulting in the successful deployment of these systems.  He also performed studies for entities like the Electric Power Research Institute on spent fuel technologies and economics, resulting in early testing of such systems.


Mr. Pennington has been involved with nuclear energy for almost 50 years. He holds six patents for nuclear technology involving criticality control, radiation shielding, packaging design, closure/sealing systems, and heat transfer designs. There are more than 600 spent fuel storage and transportation systems deployed globally for which he first led the development, then became responsible for their sales. He is also active in publishing and public outreach efforts, having authored more than 60 published industry papers and journal articles involving nuclear technology, ionizing radiation, and comparative assessments of radiation exposure from nuclear and non-nuclear industries. Additionally, he has provided expert witness services for utilities, supporting their licensing, state approval, and litigation activities, and has delivered both closed-door and public presentations at the Nuclear Regulatory Commission, as well as the National Academy of Sciences on the safety and security of dry spent fuel storage and transport. His experience includes responsibility for the commercialization of more than a dozen major storage and transport systems involving both domestic and foreign technologies. In 2010 and 2011, he provided significant input at the request of the President’s Blue Ribbon Commission on America’s Nuclear Future regarding the comparative safety of nuclear plants and nuclear spent fuel storage and transport systems.  He now works with Scientists for Accurate Radiation Information (SARI) in opposition to the application of the scientifically flawed Linear No-Threshold (LNT) hypothesis to low-dose, ionizing radiation and has published several papers and letters with his colleagues in SARI on the LNT hypothesis.






Dr. Joseph Bevelacqua is the Treasurer of the XLNT Foundation, an organization dedicated to overcoming the LNT model problem and facilitating full utilization of beneficial effects of radiation, for enhanced health.


Dr. Joseph Bevelacqua received his PhD in theoretical nuclear physics from Florida State University in 1976.  He has over 100 publications in nuclear theory, high-energy theory, mathematical physics, gravitation, cancer therapy, and radiation protection/health physics.  Dr. Bevelacqua is the author of three health physics textbooks with two in their second edition, and a fourth book to appear early 2016.  He is a Certified Health Physicist, Registered Radiation Protection Technologist, and a Certified Senior Reactor Operator.


His books address a variety of health physics areas including contemporary as well as emerging topics.  The most recent book reviews the nuclear fuel cycle including Laser Uranium Enrichment and Generation IV Reactors, nuclear terrorism, nuclear emergencies, medical imaging and therapy including advanced applications, public exposures including space tourism, and issues associated with radiation protection and nuclear safety regulations.  The LNT hypothesis is an integral aspect of this work.


Dr. Bevelacqua was a key player in the Three Mile Island Unit-2 Recovery Program and served as a Radiation Safety Engineer, Emergency Preparedness Manager, Safety Review Group Manager, and Radiological Controls Director.  He was also an Emergency Director for TMI-2 emergency response team.


Dr. Bevelacqua also participated in a variety of assignments at the Hanford Site and its cleanup program.  He was a Senior Radiological Controls Technical Advisor, acting Environmental Director, and acting Assistant Manager for Environment, Health, Safety, and Quality for the Hanford Waste Tank Farms activities. 


He has extensive experience in the commercial nuclear power industry and served as Health Physics Manager, Production Planning Manager, and Outage Manager at a commercial nuclear power reactor.  He also has plant operations, training, nuclear safety, and emergency preparedness expertise through his reactor employment.


In 1990, Dr. Bevelacqua founded his small business to provide radiation protection services to the nuclear industry.  Bevelacqua Resources has supported over 100 organizations including both domestic and foreign corporations.  Government agencies, universities, hospitals, national laboratories, and private industry have utilized Bevelacqua Resources’ services.


His interest in the LNT hypothesis began as a physics undergraduate student during a radiation biophysics course.  This interest intensified during various assignments in the radiation protection field including the accelerator, university, fuel cycle, research reactor, power reactor, environmental, and medical areas.  The resources devoted to saving small radiation doses were apparent, but these dose savings were only justified if the LNT hypothesis was valid.  Considerably fewer resources were being devoted to the safety and protection of workers from industrial hazards.  Unfortunately, numerous industrial incidents including falls, trips, burns, fires, and load drops have occurred at nuclear facilities and led to worker injuries.  The resources devoted to saving minimal dose would have been more appropriately devoted to real hazards rather a postulated radiological detriment.


As Dr. Bevelacqua’s research activities expanded to include cancer therapy using internal radiation-generating devices and vascular disruption using microspheres loaded with radioactive material, it became more apparent that the LNT hypothesis was in need of revision.  There is considerable research supporting the beneficial effects of low doses of ionizing radiation which is in conflict with the LNT hypothesis.  The updated atomic bomb data, studies supporting hormesis, importance of the human immune system in biological repair, and efficiency of DNA repair at low doses are additional evidence that suggest the LNT hypothesis is flawed.