Philippine Nuclear Research Institute (PNRI)
The premier government center for the peaceful applications of nuclear science, technology transfer, and atomic research in the Philippines. Operating under the Department of Science and Technology (DOST), the PNRI manages specialized radiation laboratories, cancer radiopharmaceutical compounding, crop mutation breeding, and the revived PRR-1 SATER nuclear reactor, while transitioning regulatory oversight to the newly created Philippine Atomic Energy Regulatory Authority (PhilATOM) under Republic Act No. 12305.
Republic Act No. 12305 and the Creation of PhilATOM
For over six decades, Philippine nuclear governance operated under a dual mandate established by Republic Act No. 2067 (Science Act of 1958) and Executive Order 128 (1987), placing both the promotion of nuclear science and the regulation of radioactive materials under the same roof. The enactment of Republic Act No. 12305, the Philippine National Nuclear Energy Safety Act, introduces the most consequential statutory reform in Philippine nuclear history.
DOST-PNRI: Dedicated R&D and Technology Transfer
Under the modern legal architecture, the Philippine Nuclear Research Institute concentrates squarely on its foundational mission as the national center for nuclear research, isotope technology, radiation processing, cancer radiopharmaceutical synthesis, and nuclear education.
Free from regulatory enforcement burdens, PNRI accelerates scientific partnerships, operates national research infrastructure such as the PRR-1 SATER and Electron Beam facilities, and drives practical technology transfer to Filipino farmers, healthcare institutions, and private industries.
PhilATOM: Independent Nuclear Regulatory Authority
Created under Republic Act No. 12305, the Philippine Atomic Energy Regulatory Authority (PhilATOM) operates as an autonomous, quasi-judicial regulatory body exercising exclusive oversight over all nuclear installations, radioactive materials, and ionizing radiation sources.
This structural separation fulfills core International Atomic Energy Agency (IAEA) safety standards, ensuring that safety licensing, inspections, safeguards enforcement, and emergency response coordination remain completely independent from promotional interests.
Historic Continuity: From Colonel Medina to Dr. Carlo Arcilla
On July 16, 1958, Colonel Florencio Medina, revered as the Father of Atomic Energy in the Philippines, was sworn in as the first commissioner of the Philippine Atomic Energy Commission (PAEC). In 1987, under Executive Order 128, the body was renamed PNRI. Today, under Director Dr. Carlo A. Arcilla, the institute has completed the revitalization of its research reactor, expanded its private industrial partnerships, and spearheaded the institutional transition into the PhilATOM regulatory era.
Philippine Research Reactor-1 (PRR-1) and SATER
The Philippine Research Reactor-1 (PRR-1), located on the PNRI campus inside the University of the Philippines Diliman district, is the country’s first and only nuclear reactor. After remaining dormant for 34 years following its 1988 shutdown, the facility was re-engineered and revived as the Subcritical Assembly for Training, Education, and Research (SATER).
Built initially under the United States Atoms for Peace nuclear exchange program, the PRR-1 attained its historic first criticality on August 26, 1963 as a 1 MW MTR-type open pool reactor engineered by General Atomics. It was converted to a 3 MW TRIGA Mark III reactor in 1984, achieving criticality in April 1988 using low-enriched uranium fuel before unforeseen technical and operational factors forced an extended shutdown.
Recognizing the critical national need for hands-on nuclear engineering capacity, the PNRI conceptualized the SATER revival in 2014 with technical guidance from the International Atomic Energy Agency (IAEA). On June 20, 2022, 44 TRIGA fuel rods were safely loaded into the core. Following rigorous system validation, the facility achieved full operational commissioning on March 9, 2023 under authorization from the Nuclear Regulatory Division.
As a subcritical assembly operating with a zero-power configuration, SATER is inherently safe: it cannot sustain a runaway chain reaction without an external neutron source. It provides Philippine scientists, university scholars, and nuclear regulators with invaluable practical training in reactor physics, neutron flux measurement, and operational protocols.
| Technical Parameter | Operational Specification |
|---|---|
| Facility Designation | PRR-1 SATER (Subcritical Assembly for Training, Education, and Research) |
| Location | PNRI Compound, Diliman, Quezon City |
| Original Criticality | August 26, 1963 (1 MW MTR-type reactor) |
| TRIGA Conversion | April 1988 (3 MW TRIGA Mark III configuration) |
| SATER Fuel Loading | June 20, 2022 (44 TRIGA low-enriched uranium fuel rods) |
| Full Operational Readiness | March 9, 2023 (Authorized for training and research) |
| Reactor Power Rating | Zero-power subcritical assembly (Inherently safe) |
| Core Mission | Reactor operator training, nuclear engineering curricula, neutron physics experiments |
Specialized Nuclear and Radiation Facilities
The PNRI compound in Quezon City houses an advanced cluster of specialized laboratories, irradiation equipment, and radiochemical facilities supporting Philippine agriculture, industry, healthcare, and environmental monitoring.
Electron Beam Irradiation Facility (EBIF)
Inaugurated as the first high-energy electron beam facility in the Philippines, this installation provides high-throughput irradiation for polymer modification, wire and cable crosslinking, and medical product sterilization.
On December 2, 2024, DOST-PNRI entered into a Memorandum of Understanding with Irradiation Solutions Inc. (ISI E-BEAM) to expand semi-commercial radiation processing capabilities across Philippine industrial manufacturing.
Cobalt-60 Multipurpose Irradiation Facility (MIF)
Utilizing gamma radiation from Cobalt-60 sources, this multipurpose plant provides microbial decontamination, disinfestation of agricultural grains, and cold sterilization of medical and pharmaceutical packaging.
The facility prolongs the shelf life of spices, dried seafood, and crops without introducing chemical residues or compromising nutrient composition.
Technetium-99m Generator Facility
Technetium-99m (Tc-99m) is the workhorse radioisotope in nuclear medicine, utilized in over 80 percent of diagnostic imaging scans worldwide for myocardial perfusion, bone cancer metastasis, and renal evaluation.
The PNRI generator laboratory extracts and compounds radiopharmaceuticals, supporting hospital nuclear medicine departments across Metro Manila and surrounding provinces.
Secondary Standards Dosimetry Laboratory (SSDL)
Designated as the national metrology laboratory for ionizing radiation, the SSDL maintains traceable measurement standards linked to the International Bureau of Weights and Measures (BIPM) and IAEA.
It performs calibration of teletherapy units, linear accelerators, diagnostic X-ray devices, and radiation survey meters used by hospitals and industrial facilities throughout the country.
Radioactive Waste Management Facility (RWMF)
The centralized national repository responsible for the collection, characterization, treatment, conditioning, and interim storage of disused sealed radioactive sources (DSRS) and radioactive waste generated in the country.
It handles decommissioned Cobalt-60 teletherapy machines, industrial gamma gauges, obsolete lightning arresters, and institutional laboratory wastes under strict containment standards.
Environmental Radiation Monitoring (EFRD-3300)
PNRI operates automated real-time environmental radiation monitors, including EFRD-3300 stations contributed through bilateral cooperation with South Korea and the IAEA.
The network provides continuous 24/7 background gamma surveillance across the Philippine archipelago, functioning as an early warning shield against regional or domestic radiological emergencies.
Nuclear Innovations Transforming Four Key Sectors
Beyond theoretical physics, the DOST-PNRI harnesses radiation chemistry and radioisotopes to solve tangible challenges in Philippine agriculture, healthcare, environmental conservation, and strategic industry.
1. Agriculture and Food Security
Carrageenan Plant Growth Promoter (PGP): Developed by irradiating natural seaweed carrageenan, this plant food supplement degrades polymers into bio-active oligosaccharides. Field trials across Luzon, Visayas, and Mindanao confirm a 20 to 30 percent increase in rice harvest yield, reinforced root development, and enhanced resistance to tungro virus and bacterial leaf blight.
Crop Mutation Breeding: Using gamma irradiation to induce beneficial genetic mutations, PNRI scientists have bred improved rice strains, high-yielding mungbean varieties, and disease-resistant ornamental plants suitable for local climates.
Sterile Insect Technique (SIT): Male fruit flies (Bactrocera philippinensis) are mass reared, sterilized using controlled gamma radiation, and released into mango-producing regions to mate without reproducing, suppressing pest populations without chemical pesticides.
Isotope Hydrology & Soil Moisture: Soil Moisture Neutron Probes and Nitrogen-15 isotopic assays determine exact crop water uptake and fertilizer absorption, eliminating nutrient waste.
2. Health and Advanced Medicine
Hydrogel Burn and Wound Dressings: Formulated from radiation-crosslinked polyvinylpyrrolidone (PVP) and carrageenan, these sterile sheets contain over 90 percent water. They provide sterile, cooling protection for extensive burns, bedsores, and diabetic foot wounds.
Honey-Alginate Dressing: Radiation-sterilized wound coverings incorporating natural Philippine honey and sodium alginate, accelerating tissue granulation and epithelialization in exudating lesions.
Cytogenetic Biodosimetry: The Biomedical Research Section analyzes blood lymphocyte chromosomes through the dicentric assay, reconstructing biological radiation doses received by workers or individuals in suspected exposure events.
Radiopharmaceutical Production: Tc-99m compounding and lyophilized cold kits enable immediate diagnostic organ imaging across regional cancer centers.
3. Environmental Protection and Surveillance
Harmful Algal Bloom (Red Tide) Nuclear Assay: Utilizing radioligand receptor binding assays (RBA), PNRI detects paralytic shellfish poisons (saxitoxin) in coastal waters with extreme sensitivity, enabling rapid advisory releases to protect coastal communities and fisheries.
Marine Sediment Geochronology: Employing Lead-210 and Cesium-137 radiometric dating, researchers track historical pollution patterns, erosion rates, and siltation across vital marine habitats and bays.
Air Particulate Pollution Analysis: Multi-elemental analysis using X-ray fluorescence and nuclear analytical techniques measures fine particulate matter (PM2.5 and PM10), identifying specific industrial, vehicular, and oceanic sources in urban air basins.
Post-Fukushima Marine Surveillance: Routine radiological baseline monitoring of Philippine seawater, sediments, and marine organisms ensures public safety from transboundary nuclear discharges.
4. Industry and Strategic Minerals
Gamma-Ray Column Scanning: Non-invasive online diagnostic technology utilizing collimated gamma sources to scan distillation columns, piping, and chemical reactors in oil refineries and petrochemical complexes without shutting down operation.
Non-Destructive Testing (NDT): Industrial radiography using Iridium-192 and Cobalt-60 sources to inspect critical welds, bridges, storage tanks, and aircraft components for interior flaws and fatigue cracks.
Rare Earth Element (REE) Exploration: Radiometric stream sediment surveys conducted across northwestern Palawan identified prospective deposits of strategic rare earth elements, thorium, and uranium essential for renewable energy and advanced electronics manufacturing.
Radiotracer Industrial Troubleshooting: Injecting minute radiotracer pulses to detect underground pipeline leaks, optimize industrial mixing kinetics, and map geothermal reservoir flows.
Technical Services for Industry, Medicine, and Research
The PNRI provides official laboratory testing, calibration, irradiation, and waste handling services to public and private clients under the DOST Citizen’s Charter.
Analytical Laboratory Services
High-precision testing conducted by the Nuclear Analytical Techniques Applications (NATA) section:
- Gamma spectrometry and elemental analysis
- Gross alpha and gross beta radioactivity counting
- Total uranium and thorium determination
- Radiometric and chemical analysis job orders
Clients submit samples through the official Job Order form at the Diliman campus service counter.
Irradiation and Sterilization
Commercial and semi-commercial irradiation services through the MIF and EBIF facilities:
- Gamma irradiation of spices, herbs, and seasonings
- Sterilization of surgical gloves, gowns, and implants
- Polymer modification and hydrogel synthesis
- Research sample dose testing and bioburden validation
Applications require the Irradiation Service Agreement and dosing protocol submission.
Radiation Metrology and SSDL
Calibration services ensuring international traceability for healthcare and industrial safety:
- Calibration of radiation survey meters and monitors
- Output verification of cancer teletherapy machines
- Personnel monitoring via TLD and OSL badge services
- Leak testing of sealed industrial radioactive sources
Accredited under ISO standards with formal calibration certificates issued to licensees.
Nuclear Training Center and Academic Outreach
The Nuclear Training Center (NTC), operating under the Technology Diffusion Division, serves as the national academy for nuclear education, radiation protection training, and professional certification.
Professional Training Courses
NTC conducts accredited certification programs required for regulatory compliance:
- Radiation Safety Officer (RSO) Course: Medical, Industrial, and Research streams
- Course on Medical Use of Radiopharmaceuticals
- Industrial Radiography and Radiation Safety (IRRS)
- Non-Destructive Testing (NDT) Level I and II certification
Applicants submit the official PNRI/NTC Form 01-B along with requisite medical fitness certificates.
Academic Research and OJT
PNRI collaborates closely with Philippine colleges and universities to nurture future atomic scientists:
- Thesis Advisorship and Research Advising (PNRI/NTC Form 24)
- On-the-Job Training and Student Internships (PNRI/NTC Form 31)
- Student access to PRR-1 SATER reactor physics experiments
- Confidentiality and safety onboarding protocols (Form 26)
Thousands of undergraduate and graduate scholars conduct laboratory practicums at PNRI annually.
Multimedia Learning and Outreach
The DOST-PNRI maintains an active digital media presence to promote public scientific awareness:
- Official YouTube Channel (@dostpnri) educational videos
- Comprehensive video playlists detailing nuclear medicine, agriculture, and reactor safety
- Atomic Energy Week (AEW) annual nationwide celebration each December
- Guided campus visits and virtual laboratory briefings for schools
Resources demystify nuclear physics and foster informed national discourse on atomic energy.
Five Divisions of the Institute
PNRI operates under the leadership of the Director and Deputy Director, organized into five specialized divisions comprising over 225 scientists, engineers, health physicists, and administrative professionals.
1. Atomic Research Division (ARD) Scientific Research
Spearheads fundamental and applied research in nuclear science, materials development, radiobiology, and environmental isotopic tracing.
2. Nuclear Services Division (NSD) Technical Operations
Maintains core nuclear installations, operates the PRR-1 SATER reactor, manages irradiation facilities, and provides metrological calibration.
3. Nuclear Regulatory Division (NRD) Transitioning to PhilATOM
Executes licensing, safeguards, inspections, and radiological standards, currently in transition to the independent PhilATOM regulatory authority under RA 12305.
4. Technology Diffusion Division (TDD) Public & Training
Manages nuclear education, scientific information dissemination, commercial business development, and international liaison with the IAEA.
5. Finance and Administrative Division (FAD) Corporate Services
Provides institutional support, budget administration, procurement, records management, and human capital stewardship for the institute.
Diliman Campus Location and Visitor Directory
The PNRI compound occupies a secure scientific enclave along Commonwealth Avenue in Diliman, Quezon City, situated in close proximity to the University of the Philippines Diliman and major national research agencies.
Campus Access and Location
Physical Address: Commonwealth Avenue, Diliman, Quezon City, 1101 Metro Manila, Philippines.
Coordinates: 14°39'40.36" N, 121°03'20.52" E (Plus Code: M364+PW4, Quezon City).
Office Operating Hours: Monday to Friday, 8:00 AM to 5:00 PM (Philippine Standard Time, PHT).
Landmarks: Accessible via Commonwealth Avenue, located adjacent to the Philippine Coconut Authority (PCA) complex and near the University of the Philippines Diliman campus.
Visitor Protocol: Because the compound houses operational radiological facilities and the PRR-1 SATER reactor, all visitors must present valid government identification at the main gate, register with security, and wear an official visitor badge at all times.
Contact Channels and Inquiries
Trunkline: (02) 8929 6011 to 19
Direct Line: (02) 8920 8738
Facsimile: (02) 8920 1646
Official Website: pnri.dost.gov.ph
Parent Ministry: Department of Science and Technology (dost.gov.ph)
Official Social Media: YouTube (@dostpnri), Facebook (DOST-PNRI official agency page).
Frequently Asked Questions
Key information regarding the Philippine Nuclear Research Institute, reactor operations, radiation safety, and public services.
What is the primary role of the Philippine Nuclear Research Institute (PNRI)?
The PNRI is the dedicated national agency under the Department of Science and Technology (DOST) tasked with conducting research and development on the peaceful applications of nuclear science, delivering specialized radiation and testing services to hospitals and industries, transferring atomic innovations to Filipino end-users, and operating national nuclear facilities such as the PRR-1 SATER reactor.
How does Republic Act No. 12305 change the PNRI mandate?
Republic Act No. 12305, known as the Philippine National Nuclear Energy Safety Act, creates the Philippine Atomic Energy Regulatory Authority (PhilATOM) as an independent regulatory body. This historic law legally separates promotional research from regulatory oversight. PhilATOM assumes full responsibility for safety standards, licensing, and inspections, enabling DOST-PNRI to focus entirely on nuclear science, advanced R&D, and technological diffusion.
Is the PRR-1 SATER reactor operational, and is it safe for nearby communities?
Yes, the PRR-1 SATER (Subcritical Assembly for Training, Education, and Research) was loaded with 44 TRIGA fuel rods in June 2022 and achieved full operational readiness on March 9, 2023. It is inherently safe: designed with a zero-power subcritical core configuration, it cannot sustain a chain reaction without an external neutron source and produces negligible thermal power, eliminating any risk of core overheating or runaway reactions.
What agricultural technologies has PNRI developed for Filipino farmers?
PNRI developed the Carrageenan Plant Growth Promoter (PGP), an oligosaccharide supplement produced by irradiating natural seaweed carrageenan that increases rice harvest yields by 20 to 30 percent while enhancing plant resistance to diseases like tungro virus. PNRI also utilizes crop mutation breeding to develop high-yielding mutant rice and mungbean varieties, alongside the Sterile Insect Technique (SIT) to suppress fruit fly pests without chemical sprays.
How does PNRI support cancer patients and healthcare facilities in the Philippines?
PNRI operates the Technetium-99m Generator Facility, compounding critical radiopharmaceuticals for hospital diagnostic scans. Its Secondary Standards Dosimetry Laboratory (SSDL) calibrates cancer therapy linear accelerators and teletherapy units nationwide to ensure accurate radiation dosages, while its Biomedical Research Section provides sterile hydrogel wound dressings and cytogenetic biodosimetry testing.
How can professionals or students enroll in Nuclear Training Center (NTC) courses?
Professionals seeking Radiation Safety Officer (RSO) or Non-Destructive Testing (NDT) certification submit the official PNRI/NTC Form 01-B to the Nuclear Training Center. University students seeking thesis advisorship submit NTC Form 24, while internship candidates apply via NTC Form 31. Course schedules and fee advisories are published periodically on the official PNRI portal.
How does the Philippines monitor environmental radiation?
PNRI operates a nationwide network of automated environmental radiation monitoring stations, including the EFRD-3300 real-time ambient gamma monitors. These stations continuously measure background radiation levels, functioning as an early warning network against radiological incidents, while marine teams perform routine radionuclide analysis across Philippine coastal waters.
Can members of the public or school groups visit the PNRI compound in Quezon City?
Yes, academic groups and educational institutions may request guided educational tours, particularly during the annual Atomic Energy Week celebrated every December. Requests must be arranged in advance with the Technology Diffusion Division, and all visitors must adhere to strict campus identification and safety clearance protocols.
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